uk: Комп'ютерні науки

description: Depth-Image Based Rendering (DIBR) techniques enable the creation of virtual views from color and corresponding depth images. In stereoscopic 3D film making, the ability of DIBR to render views at arbitrary viewing positions allows adaption of a 3D scene’s depth budget to address physical depth limitations of the display and to optimize for visual viewing comfort. This rendering of stereoscopic videos requires the determination of optimal depth range adaptions, which typically depends on the scene content, the display system and the viewers’ experience. We show that this configuration problem can be modeled by a linear optimization problem that aims at maximizing the overall quality of experience (QoE) based on depth range adaption. Rules from literature are refined by data analysis and feature extraction based on datasets from film industry and human attention models. We discuss our approach in terms of practical feasibility, generalizability w.r.t different content and subjective image quality, visual discomfort and stereoscopic effects and demonstrate its performance in a user study on publicly available and self-recorded datasets. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Linear optimization approach for depth range adaption of stereoscopic videos


Gauthier Lafruit

type: Person

cs: Informatika

de: Informatik

fi: tietojenkäsittelytiede

uk: Комп'ютерні науки

en: Computer Science

fr: Informatique

da: Datalogi

es: Ciencias de la Computación

nl: Informatica

cs: Technické vědy

de: Ingenieurwissenschaften

fi: tekniikka

uk: Інженерія

en: Engineering Sciences

fr: Ingénierie

da: Ingeniørvidenskab

es: Ingeniería

nl: Engineering

description: ISO/IEC MPEG and ITU-T VCEG have recently jointly issued a new multiview video compression standard, called 3D-HEVC, which reaches unpreceded compression performances for linear, dense camera arrangements. For instance, 80 full-HD views for so-called Super-MultiView (SMV) autostereoscopic 3D displays can be transmitted by 3D-HEVC at 15 to 60 Mbps, comparable to the bandwidth requirements of 4k/8k video. Novel SMV displays capable of displaying a couple of hundreds of full-HD views, that are already prototyped in R&D labs, would benefit from an additional two-fold compression gain. Transmitting depth maps along with coded video in a single 3D-HEVC stream and synthesizing additional output views using Depth Image Based Rendering (DIBR) techniques, opens opportunities for omitting some camera views for higher compression. However, high quality-bitrate penalties have been observed in applications where the multiview content is captured by an arc camera arrangement surrounding the scene, e.g. in sports events. Moreover, there is currently no out of the box technology that can provide high quality virtual views synthesized from relatively sparse, arbitrarily arranged cameras in Free Navigation (FN) for e.g. the Matrix bullet effect with only a dozen of cameras. The MPEG standardization committee has therefore issued a Call for Evidence in June 2015 [N15348], calling for improved compression technologies to support near-future SMV and FN applications. OBJECTIVE: The main objective is to improve view prediction/synthesis for better SMV compression performance when omitting/decimating some of the input views during transmission, as well as supporting FN functionalities in non-linear, sparse camera arrangements. Visually-pleasant DIBR view synthesis methods therefore require multi-camera depth estimation and inpainting approaches that are currently not supported in the MPEG reference software, which historically has mainly been confined to stereoscopic scene analysis/prediction/synthesis methods. METHOD: Multi-camera plane sweeping, epipolar plane image and inpainting techniques that coherently integrate all available camera information into a single data representation, drastically improve the visual coherence between successive virtual views. Moreover, Human Visual System (HVS) masking effects in spatio-temporally adjacent views provide a high degree of forgiveness in decimating the multi-camera input information, similar to what has been done in the TV pioneering era for inserting low-bandwidth chrominance data into the settled luminance spectrum bandwidth of B&W TV. RESULTS: While omitting some input views in the transmission chain and resynthesizing these views at the decoder represents a huge objective PSNR penalty (5 to 10 dB), limited subjective MOS impact has been observed with improved, non-linear multi-camera processing tools (color calibration, depth estimation and view synthesis), proper view decimation and Group of Views (GoV) data interleaving, cf. graph in attachment. NOVELTY: Continued work on [Jorissen2015] and [Dricot2015] with the inclusion of aforementioned tools, deep into the 3D-HEVC coding chain, provides substantial visual quality gains. New subjective quality metrics with stereoscopic and angular velocity viewpoint transition considerations - as opposed to a fixed viewpoint in traditional TV – give additional HVS masking, reaching higher MOS scores. Further validation on Holografika SMV displays with a more extensive set of dozens of video sequences is pursued. © 2016, Society for Imaging Science and Technology (IS&T).

TIB AV-Portal

type: Service

type: WebContent

type: MediaObject

@language: en

cs: přihlášení není vyžadováno

de: keine Anmeldung erforderlich

uk: вхід без авторизації

en: no login required

nl: geen login vereist

name: New visual coding exploration in MPEG: Super-multiView and free navigation in free viewpoint TV

IS&T Electronic Imaging (EI) Symposium

type: Organization

cs: Video

de: Video

fi: Video

uk: Відео

en: Video

fr: Vidéo

da: Video

nl: Video

es: Video


uk: Комп'ютерні науки

description: Real 360-degree holographic display method based on the CGCH’s using high-speed projection and rotating screen is proposed. The laser beam reflects on the high-speed DMD during the DMD displays computer-generated holograms in the generated consistency of for cylindrical surface and 3D images are reconstructed on the rotating screen. Reconstructed 3D images for the corresponding cylindrical holograms are tailored along horizontal direction while rotating screen is synchronized with DMD projection. Horizontally assembled entire 3D image is observed from anywhere around the display and CGCH can be demonstrated successfully. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Optical realization for the computer-generated cylindrical hologram


uk: Комп'ютерні науки

description: The performance and comfort of aircrew using stereoscopic displays viewed at a near distance over long periods of time is now an important operational factor to consider with the introduction of aerial refueling tankers using remote vision system technology. Due to concern that the current USAF vision standards and test procedures may not be adequate for accurately identifying aircrew medically fit to operate this new technology for long mission durations, we investigated performance with the use of a simulated remote vision system, and the ability of different vision tests to predict performance and reported discomfort. The results showed that the use of stereoscopic cameras generally improved performance but that individuals with poorer vision test scores performed more poorly and reported greater levels of discomfort. In general, newly developed computer-based vision tests were more predictive of both performance and reported discomfort than standard optometric tests. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Stereoscopic remote vision system aerial refueling visual performance


uk: Комп'ютерні науки

description: Public presentations in large-scale stereoscopic 3D environments like CAVEs are usually accompanied by strong side-effects, such as unexpected movements or even motion sickness caused by, for example, imprecisely-tracked wands and a disturbed stereoscopic vision. On one hand, 3D navigation is required to enable an appropriate interaction with the spatial objects. On the other hand, in most cases only one person is the navigator, whereas all other persons are forming the audience. Moreover, both usually lack the overview in a complex environment. Therefore, a new approach is proposed here, enabling 1) 3D navigation on a precise navigation screen representing an overview map (also known as worlds in miniature), and 2) processing the movement information to a large-scale environment representing the real world. The interactive virtual map is stereoscopically visualized by the zSpace 200® (using CELLmicrocosmos 1.2 CellExplorer), whereas the virtual world is shown on a panoramic 330° CAVE2TM (using Omegalib). We will show that the distinction between the navigation interface and the virtual world environment is reasonable for stereoscopic 3D presentation and exploration purposes, because the stereoscopic virtual world rendering can be optimized with respect to the different tour points, extending our previously published interactive projection plane approach. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Stereoscopic space map – A semi-immersive navigation interface for 3D multi-display presentations


uk: Комп'ютерні науки

description: Procedural generation of virtual scenes (like e.g., complex cities with buildings of different sizes and heights) is widely used in the CG movies and videogames industry. Even if this kind of scenes are often visualized using stereoscopy, however, to our knowledge, stereoscopy is not currently used as a tool in the procedural generation, while a more comprehensive integration of stereoscopic parameters can play a relevant role in the automatic creation and placement of virtual models. In this paper, we show how to use stereoscopic parameters to guide the procedural generation of a scene in an open-source modeling software. Virtual objects can be automatically placed inside the stereoscopic volume, in order to reach the maximum amount of parallax on screen, given a particular interocular distance, convergence plane and display size. The proposed approach allows to create again a virtual scene, given a particular context of visualization, avoiding problems related to excessive positive parallax in the final rendering. Moreover, the proposed approach can be used also to automatically detect window violations, by determining overlaps in negative parallax area between models and the view frustums of the stereoscopic camera, and to apply proper solutions, like e.g. the automatic placement of a floating window. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Stereoscopy-based procedural generation of virtual environments


uk: Комп'ютерні науки

description: We propose a semi-automatic 2D-to-3D conversion algorithm that is embedded in an efficient optimization framework, i.e., cost volume filtering, which assigns pixels to depth values initialized by user-given scribbles. The proposed algorithm is capable of capturing depth changes of objects that move towards or farther away from the camera. We achieve this by determining a rough depth order between objects in each frame, according to the motion observed in the video, and incorporate this depth order into the depth interpolation process. In contrast to previous publications, our algorithm focuses on avoiding conflicts between the generated depth maps and monocular depth cues that are present in the video, i.e., motion-caused occlusions, and thus takes a step towards the generation of perceptually coherent depth maps. We demonstrate the capabilities of our proposed algorithm on synthetic and recorded video data and by comparison with depth ground truth. Experimental evaluations show that we obtain temporally and perceptually coherent 2D-to-3D conversions in which temporal and spatial edges coincide with edges in the corresponding input video. Our proposed depth interpolation can clearly improve the conversion results for videos that contain objects which exhibit motion in depth, compared to commonly performed naïve depth interpolation techniques. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Towards perceptually coherent depth maps in 2D-to-3D conversion


uk: Комп'ютерні науки

description: 1) OBJECTIVE: The main objective of the large-scale quality analysis of S3D movies is to gain a better understanding of how quality control was performed in different movies. Also several novel quality metrics are presented, including channel swap detection, evaluation of temporal shifts between stereoscopic views and depth continuity. 2) METHOD: The main technical obstacle that we had to overcome was an enormous amount of computation and disc space required by such an analysis. Evaluation of one movie could take up to 4 weeks and required over 40GB for the source Blu-ray only. To maximize the efficiency we had to rewrite all of our metrics to exploit the multicore architecture of contemporary CPUs. We have also developed a system that efficiently distributes the computations across the cluster of up to 17 computers working in parallel. It enabled us to finish the evaluation of 105 movies in about 6 months. 3) RESULTS: An evaluation of 105 S3D movies’ technical quality has been conducted that span over 50 years of the stereoscopic cinema history. Our main observations are as follows: According to our measurements, “Avatar” in fact had a superior technical quality compared to the most S3D movies of the previous decade. So it is not surprising that it was positively received by the viewers. S3D quality improvement over the years is fairly obvious from the conducted evaluation, e.g. the results of average-quality movies from 2010 correspond to the results of the 2014 movies with nearly the worst technical quality. A more important conclusion from the analysis, however, is that it gradually becomes possible to produce low-budget movies with excellent technical quality, that was previously within reach only for high-budget blockbusters. We hope that new objective quality metrics like the channel mismatch metric will find their applications in production pipelines. It can further decrease the number of viewers experiencing discomfort and give a start to the new surge of S3D popularity. 4) CONCLUSION: Objective S3D quality metrics make it easier to find problematic frames or entire shots in movies, that could potentially lead to discomfort of a significant fraction of the audience. Our analysis have already revealed thousands of such scenes in real S3D movies. But to directly estimate this discomfort subjective evaluations are necessary. We have organized several of such evaluations with the help of volunteers, that were asked to watch some of the scenes with the worst technical quality according to our analysis. These experiments allow us to further improve the metrics and to develop a universal metric that could directly predict a percentage of the audience experiencing a noticeable discomfort. It is already clear that the development of such universal metric is a very challenging problem, so we are looking for collaboration. It is also clear to us that the majority of problems could be fixed in post-production with minimal user intervention, if not entirely automatically. Some of these techniques are not widely employed just because the problem itself is not considered important enough to require correction. We hope our work could help shed the light on the problem and more attention will be drawn to correcting the S3D production issues. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Trends in S3D movies quality as evaluated on 105 movies and 10 quality metrics


3-D movie rarities

uk: Комп'ютерні науки

description: Stereoscopic motion pictures have existed for 100 years, and the 3-D Film Archive - founded in 1990 - has a key role in saving and preserving these historic elements. Greg Kintz will discuss the many obstacles and challenges in locating and saving these precious stereo images. For example, their scanning, panel-matching, and stereoscopic image matching techniques have been widely recognized for their efficiency and precision. As Greg will present, the full restoration process begins with 2k or 4k wet-gate scanning of the best surviving 35 mm elements. The films are then aligned, shot-by-shot, for precise alignment and panel matching of the left / right elements. The 3-D Film Archive's multi-step process also includes image stabilization, flicker reduction, color balance, and dirt clean-up. At one time, the 3-D Film Archive held the largest collection of vintage stereoscopic film elements in the world. As such, Greg will display some of his favorite clips on the SD&A stereoscopic projection screen. In addition, the Archive's first four releases on Blu-ray 3D have enjoyed acclaim: Dragonfly Squadron, The Bubble, 3-D Rarities, and The Mask. For the first time, contemporary viewers are able to see these films at home in quality equal to or greater than the original theatrical experience. Greg will also discuss how the Archive is working to save and restore additional Golden Age 3-D films through licensing and partnerships. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації


uk: Комп'ютерні науки

description: In April/May 2015, a team led by Curtin University, WA Museum and DOF Subsea conducted a 3D imaging survey of the two historic shipwrecks HMAS Sydney (II) and HSK Kormoran. The Australian vessel HMAS Sydney and the German vessel HSK Kormoran encountered each other in the midst of World War II on the 19th of November in 1941 off the Western Australian coast. After a fierce battle both ships sank each other and they now lie in 2500 m (8200 feet) water depth, 200 km (125 miles) offshore from Shark Bay. This event is Australia's largest loss of life in a single maritime disaster - with the entire crew of 645 perishing on the Sydney and 82 crew lost on the Kormoran. The exact location of the two wrecks remained unknown for almost 70 years until they were discovered in 2008. The aim of the 2015 expedition was to conduct a detailed 3D imaging survey of the two wrecks and their extensive debris fields. A custom underwater lighting and camera package was developed for fitment to two work-class underwater remotely operated vehicles (ROVs) as often used in the offshore oil and gas industry. The camera package included six 3D cameras, and fourteen digital still cameras fitted across the two ROVs intended to capture feature photography, cinematography and 3D reconstruction photography. The camera package included six underwater stereoscopic cameras (three on each ROV) which captured a mix of 3D HD video footage, 3D stills, and 3D 4K video footage. High light levels are key to successful underwater photography and the system used a suite of ten LED underwater lights on each ROV to achieve artistic and effective lighting effects. At the conclusion of four days of diving, the team had collected over 500,000 stills and over 300 hours of HD footage. The collected materials will contribute towards the development of museum exhibitions at the WA Museum and partner institutions, and the development of a feature documentary. Another key technology being deployed on this project is photogrammetric 3D reconstruction which allows the generation of photo-realistic digital 3D models from a series of 2D photographs. These digital 3D models can be visualised in stereoscopic 3D and potentially 3D printed in full-colour to create physical reproductions of items from the sea floor. This presentation will provide an overview of the expedition, a summary of the technology deployed, and an insight into the 3D imaging materials captured. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Two shipwrecks, 2500 metres underwater, six 3D cameras: Let the survey begin


uk: Комп'ютерні науки

description: Im Vortrag wird «interaktiv» ganz langsam und in kleinen Schritten ein Shell-Skript entwickelt – um zu demonstrieren, wie einfach das mit ein wenig Übung sein kann (und wie nützlich zum Schluss!).

@language: de

uk: вхід без авторизації

name: Es muss mal wieder SHELL sein...: Haralds kleine Helferlein: die Shell und mehr

name: Free and Open Source Software Conference (FrOSCon) e.V.


Das X markiert die Stelle!

uk: Комп'ютерні науки

description: Neue Zusammenhänge mit Hilfe von Geodaten erkennen Der Wert von Daten entsteht oft erst durch die passende Aufbereitung. Durch eine räumliche Zuordnung oder geografische Aggregation können oftmals völlig neue Dimensionen und somit Mehrwerte geschaffen werden. Mit Hilfe von frei verfügbaren Geodaten und passenden Open Source Werkzeuge und Komponenten lassen sich weltweit anfallende Nachrichten so aufbereiten, dass man mit daraus entstehenden Heatmaps Nachrichtentrends identifizieren kann.

uk: вхід без авторизації


Cyborgs Unite!

uk: Комп'ютерні науки

description: When Karen discovered at a young age that she had a life threatening heart condition, the last thing she expected was to have to worry about software. Now, with a heart device implanted in her body, she has come to understand not only how vulnerable medical devices are but how we are making critical choices about software that will have huge societal impact. Karen will talk about the hacks which show how essential free and open source software is and will discuss her professional and personal view of the issues both as a patient and as a cyborg lawyer. Karen will also touch on potential avenues for accountability, transparency, and access to remedies as we hurtle towards an Internet of Things built on proprietary source code that prevents us from knowing exactly how these vital devices work, what data they are collecting and to what ends, what their vulnerabilities might be, and the extent to which their closed, proprietary nature keeps us from developing societal mechanisms and review processes to keep us safe.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Aleksander Zdyb will present unique security requirements of Internet of Things, automotive and other embedded devices.

uk: вхід без авторизації

name: Internet of Things – novelty and comfort vs. security


It's all about the goto

uk: Комп'ютерні науки

description: In this presentation, I am showing you some of the inner workings of PHP. We are going to look at how different language keywords and constructs are handled internally. Basically, everything is converted to goto, but the how and why, is not as simple as it seems! This is a very in depth talk, mostly interesting to people that want to know how PHP works internally. Expect lots of wonkyness, a form of assembly, and trees.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: The talk compares the advantages from MySQL, MariaDB and PostgreSQL. The intention for the talk is helping you finding the system that fits best to you and your applications.

uk: вхід без авторизації

name: MySQL, MariaDB versus PostgreSQL: Which system is mine?


uk: Комп'ютерні науки

description: Neben der klassischen MySQL Replikation bietet MySQL 5.7 nun eine neue Replikationstechnologie 'Group Replikation' für den hochverfügbaren MySQL Betrieb an. Um die Verwendung der Group Replikation zu vereinfachen stellt Oracle weiterhin den MySQL Router und die MySQL Shell zur Verfügung und nennt diese Technologie 'InnoDB Cluster'. Durch das unkomplizierte Setup erhält man eine Master-Master Architektur. In Verbindung mit MySQL Router schafft man ohne Änderungen in der Applikation eine Architektur für automatischen Failover ohne Datenverlust. Dieser Vortrag behandelt die Details einer InnoDB Cluster Lösung und vertieft diese durch eine Demo.

uk: вхід без авторизації

name: MySQL 5.7 - InnoDB Cluster [HA built in]


uk: Комп'ютерні науки

description: The complexity and amount of data rises. Modern graph databases are designed to handle the complexity but still not for the amount of data.

uk: вхід без авторизації

name: Handling Billions Of Edges in a Graph Database


uk: Комп'ютерні науки

description: Dieser Vortrag behandelt die Verwaltung von Linux-Systemen mittels Foreman/Katello und Red Hat Satellite 6. Neben Grundlagen wird auch die Migration von Spacewalk bzw. Red Hat Satellite 5 fokussiert.

uk: вхід без авторизації

name: Lifecycle-Management mit Foreman und Katello: Grundlagen und Spacewalk-Migration


uk: Комп'ютерні науки

description: How to implement reliable system software with transactions. Theory and practice.

uk: вхід без авторизації

name: System-Level Transactions with picotm: The Days of Plenty Are Yet to Come


uk: Комп'ютерні науки

description: "Mit Microservices wird jedes Problem zum Krimi," ist ein gängiges Vorurteil gegen diesen Entwicklungsansatz. Das muss es aber gar nicht sein! Der Vortrag zeigt, wie man eine Spring Boot Applikation einfach und rundum überwachen kann. Dazu sehen wir uns an: * Systemmetriken: Netzwerkverkehr und Systemlast im Auge behalten. * Applikations-Logs: Strukturiert loggen und die Daten zentral speichern. * Uptime-Monitoring: Dienste mit Heartbeat aktiv überwachen. * Applikations-Metriken: Spring Boot Metriken regelmäßig abfragen und speichern. * Request-Tracing: Requests durch das ganze System nachverfolgen mit Hilfe von Sleuth und den zeitlichen Ablauf mit Zipkin darstellen. Und wir probieren das alles auch gleich live aus, da es so einfach und auch wesentlich interaktiver ist.

uk: вхід без авторизації

name: Überwache deine Services: Logs, Metriken und Traces


Standards für barrierefreie Webseiten

uk: Комп'ютерні науки

description: Barrierefreiheit ist seit vielen Jahren ein Schlagwort bei der Web Entwicklung. Allerdings ist es für Einsteigerinnen und Einsteiger oft schwierig, einen Überblick über die Thematik zu bekommen. Der Vortrag stellt die aktuellen Standards für barrierefreie Webseiten und Webanwendungen aus Sicht von Webentwickerinnen und Webentwicklern vor.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: vutuv is to LinkedIn and XING what DuckDuckGo is to Google. We provide a free business network which has already a 7 digit user base. This talk dives into technical and business aspects of this project.

uk: вхід без авторизації

name: vutuv - An Open-Source Business Network: Fast, Free and Secure


uk: Комп'ютерні науки

description: Auch unter Verwendung von ausschließlich OpenSource-Software ist es möglich, eine Schule inklusive Verwaltung zu betreiben - von der Firewall über zentrale Benutzerverwaltung bis zur Telefonie und automatischen Installation von Computern. Übertragen lässt sich das Beispiel auch auf andere Organisationen.

uk: вхід без авторизації

name: Aufbau eines Schulnetzwerkes: Wie man Bildung unabhängiger von proprietärer Software macht


uk: Комп'ютерні науки

description: Upcoming web component technologies like the Client-side Component Model (ccm) bring us to a new kind of web. Each developed ccm-based web component, that is published under a free software licence, expands the functionality of the web as a whole and is embeddable in every web-based content. They are reusable and recombinable like Lego. In this talk we give a showcase, on the example of ccm, based on live demos, how it feels to think, work and develop in web components and what possibilities this will offer, specially to the free software community. After that, ccm will be explained in more detail.

uk: вхід без авторизації

name: Modular Web: New ways for free software developers to shape the world.


Virtual Observatory

uk: Комп'ютерні науки

description: Das Virtual Observatory (VO) ist eine Sammlung von astronomischen Datenarchiven und -diensten im Internet. Die Vision ist der transparente und nahtlose Zugriff auf alle astronomischen Daten. Astronomische Daten sind hierbei Daten verschiedenster Art, neben klassischen Katalogen auch Bilddaten, andere Messdaten und Daten aus Simulationen. Dies ermöglicht Forschern den einfachen Zugriff auf Daten und Ressourcen für ihre wissenschaftliche Tätigkeit, auch ist dieser offene Zugriff eine Grundlage für Reproduzierbarkeit und weitere Analysen. Die Veröffentlichung von Daten und Diensten im VO nimmt einen immer größeren Stellenwert ein, so werden z.B. die Daten des Astrometriesateliten Gaia auf diese Weise veröffenlicht.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: In this work we present a real-time system for face detection and emotion/gender classification using Convolutional Neural Networks and Haar-like features.

uk: вхід без авторизації

name: Real-time Face Detection and Emotion/Gender classification with Convolutional Neural Networks


uk: Комп'ютерні науки

description: Containers are not new and you can hardly find a job in IT nowadays which doesn't involve dealing with them one way or the other. But once you got your hands on the container technology you are inevitably run into the container management and orchestration topics. Kubernetes is a more or less vendor-independent orchestration platform, which provides out of the box automation for many standard infrastructure tasks (scaling, load-balancing, scheduling..).

uk: вхід без авторизації

name: Introduction to container orchestration with Kubernetes: Everything you need to know for your next job interview


uk: Комп'ютерні науки

description: Der derzeitige Trend zur Digitalisierung von vielen Arbeitsbereichen unseres täglichen Lebens wird grundlegende Veränderungen in nahezu allen Berufen bewirken. Diese Veränderungen, die ähnliche Auswirkungen haben wird wie damals die industrielle Revolution, betrifft auch den Job des Systemadministrators und die Art der Provisionierung und Verwaltung von Serversystemen und IT Diensten. Erfolgreiche Digitalisierung benötigt eine ganzheitliche, holistische Sicht der IT Administration und lässt sich nur mit einer Automatisierung aller Einzelschritte bewerkstelligen. Open Source Technologien wie KVM, Ceph und OpenVswitch sind professionelle Tools zum Aufbau und Betrieb von modernen IT Infrastrukturen. Die openQRM Community Edition stellt API Schnittstellen zu allen verbreiteten Open-Source Einzelkomponenten bereit und verknüpft Bare-Metal und VM Provisionierung, Konfigurationsmanagement, Netzwerk- und Storageadminstration sowie System- und Servicemonitoring und IT Dokumentation zu einem voll automatisiertem Cloud Arbeitsablauf. Der resultierende IaaS Selbstbedienungsdienst stellt die jeweiligen Einzelkomponenten als Cloud-Produkt zur eigenständigen Bestellung über das openQRM Cloud Portal zur Verfügung. Gepaart mit integrierten E-Commerce Frontend und Bugtracker, beinhaltet die openQRM Cloud auch ein eigenes Abrechnungssystem sowie einen Applikations-Marktplatz zur Automatisierung der Softwarebereitstellung. Diese Präsentation stellt die technischen und sozialen Herausforderungen zur bevorstehenden Digitalisierung dar und zeigt mögliche Lösungsszenarien mittels des Fallbeispiels: KVM/Ceph/OpenVswitch/Puppet/openQRM.

uk: вхід без авторизації

name: IaaS als Motor der Digitalisierung - IT Self-Service und Automatisierung auf Basis von Open-Source Technologien: Ein Anwendungsfall mit KVM, Ceph, OpenVswitch und openQRM Community Cloud


uk: Комп'ютерні науки

description: Gestartet Anfang der 2000er wurde Limux immer wieder als Leuchtturm-Projekt für Freie Software genannt. Seitdem hören wir regelmässig Gerüchte über den Stop des Projekts. Haben sie schon auf proprietäre Software zurückgewechselt? Haben sie nicht schon letztes Jahr zurückmigriert? Ist es ein Trend, dass die Öffentliche Verwaltung keine Freie Software mehr nutzt? Haben wir versagt und ist es Zeit depremiert zu sein und damit aufzuhören, was wir machen? Brauchen wir neue Strategien? Das sind die Fragen mit denen Menschen in unserer Gemeinschaft konfrontiert werden. Wir werden in dem Vortrag diese Fragen kritisch beleuchten, um herauszufinden was wir als Freie-Software-Gemeinschaft daraus für neue Strategien lernen können.

uk: вхід без авторизації

name: Limux: das Ende eines Leuchtturm-Projekts!?


uk: Комп'ютерні науки

description: The European General Data Protection Regulation will apply in May 2018. What does this mean for your software? What do you need to consider? Which information do you need to publish?

uk: вхід без авторизації

name: General Data Protection Regulation is coming: What does it mean for your software?


uk: Комп'ютерні науки

description: A presentation on an effort to implement Linux User Session Recording for the Enterprise using new and existing open-source software.

uk: вхід без авторизації

name: User Session Recording for the Enterprise: An Open-Source Effort by Red Hat


uk: Комп'ютерні науки

description: Wie wir den DLR-Wissenschaftlern Open-Source-Lizenzen näher bringen. Wie bringt man Wissenschaftlern und Ingenieuren Wissen über Open-Source-Lizenzen bei? In diesem Vortrag stellen wir unseren Ansatz im Deutschen Zentrum für Luft- und Raumfahrt (DLR) vor.

uk: вхід без авторизації

name: Wissenschaft & Open Source - It's Complicated

name: Free and Open Source Software Conference (FrOSCon) e.V.


uk: Комп'ютерні науки

description: A lot of progress has been made in the Linux kernel security in the last 10 years. Also, there are lot of things we could be doing better, and one could make the case that we have fallen behind the state of the art in a number of areas, including self-protection and hardening. Along with that there has been effort going on to improve the static/dynamic analysis to fix security issues. This talk aims at providing the overview of the work going on in the Linux kernel security including but not limited to secuirty modules, static/dynamic analysis tools, kernel self protection project etc.

uk: вхід без авторизації

name: What's up in the land of the Linux kernel security?


Bazel

uk: Комп'ютерні науки

description: Bazel is a build system open-sourced in 2015 after years of internal-only use at Google. It's main focus is efficiently building on large code bases achieving correctness by completely tracking all dependencies. BUILD files are written in a declarative style and new rules can be added via Bazel's extension language. The talk gives an overview of the basic concepts and design principles of Bazel, trying to explain why there is still room for yet another build system.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Thinking in small and self contained pieces brings wonderful benefits, but also a lot of new problems. In the last three years I had the chance to work on different microservice platforms. The challenges I faced in these platforms were more or less the same.

uk: вхід без авторизації

name: Microservice Toolbox: Building blocks for your next microservice platform


Storing Non-Scalar Data

uk: Комп'ютерні науки

description: In this presentation we will look at storing complex data in a single field. Many noSQL solutions are created around this (such as Redis' lists, sets and hashes; MongoDB's and CouchDB's records), and many relational database now also support storing complex data in a single field through specific data types (such as PostGreSQL's JSONB or hstore, MySQL's JSON). Each of the different database engines support different things, and handle these data types in different ways. In this session we compare the different approaches to storage, indexing and interactions with these data types in different databases.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Mit dem privacyIDEA LDAP Proxy setzen wir in einem Netzwerk leicht flächendeckend eine flexible Zwei-Faktor-Authentifizierung um.

uk: вхід без авторизації

name: Zwei-Faktor-Authentifizierung für LDAP: Der privacyIDEA LDAP-Proxy


Sicheres Löschen von Daten auf SSDs

uk: Комп'ютерні науки

description: Um Daten auf Festplatten sicher zu löschen gibt es etablierte Programme und Vorgehensweisen. Bei SSDs sieht das gänzlich anders aus: Diese speichern die Daten auf ganz andere Weise und erzeugen im normalen Betrieb eigenständig Kopien. Eine ganze SSD zuverlässig zu löschen ist relativ einfach, selektiv einzelne Daten aus Partitionen oder Dateien sicher zu entfernen ist hingegen schwer. Der Vortrag stellt das Problem und den Unterschied zwischen SSDs und Festplatten vor und präsentiert eine Erweiterung für cryptsetup für Linux, mittels derer das in vielen Geräten vorhandene TPM-Modul genutzt wird um Daten aus einzelnen verschlüsselten Containern von SSDs sicher zu entfernen.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Dieser Vortrag führt relevante Entwurfsmuster ein, um skalierbare, umgebungsunabhängige, fehlertolerante und versionierte Microservices bereitzustellen. Darauf basierend wird die Umsetzung durch Komponenten des Netflix Open Source Stacks vorgestellt: Konfiguration mit Archaius, elastische Dienste mit Eureka, Gateway Service mit Zuul, Resilience mit Hystrix und Service-Komposition mit RxJava.

uk: вхід без авторизації

name: Fehlertolerante und skalierbare Systeme mit dem Netflix OSS


uk: Комп'ютерні науки

description: 25 Jahre Linux! Ein Jubiläum zum Feiern und ein Grund für Microsoft in die Linux-Foundation einzutreten. Diese und andere Rückblicke auf das vergangene Jahr in der Open-Source und Free-Software-Welt nehmen auch in diesem Jahr Oliver Zendel und Michael Kleinhenz auf ironische Weise auf und reisen durch die Nachrichten, Ereignisse und Kuriositäten der letzten 12 Monate. Der IoT Sicherheitsalbtraum, fliegende Warenhäuser, die Technikverdrossenheit des gemeinen Esels und eine geklaute Straßenbahn sind nur einige der vielen Themen des Abends. Was bedeutet Fair Use nach Oracle-Definition? Warum ist ein Porsche die ideale Entwicklungsplattform für Open-Source-Spiele und was gibt es neues vom Tintenkrieg? Diese Fragen beantworten wir mit einem Augenzwinkern. Und obendrauf gibt es noch Open-Source-Pancakes.

uk: вхід без авторизації

name: State of the Union 2017: Das Open-Source, Free-Software und Technologie-Jahr 2016/2017 - Ein Rückblick


uk: Комп'ютерні науки

description: MariaDB 10.2 has brought two new important querying features, Common Table Expressions (CTEs) and Window Functions. Both features provide greater expressibility to queries, thus opening up opportunities for the optimiser to provide speedups not previously achievable. With a focus on analytical queries, we will see how to improve query performance sometimes by an order of magnitude compared to regular SQL.

uk: вхід без авторизації

name: Faster Analytics with MariaDB 10.2: Advanced SQL features - CTEs and Window Function


uk: Комп'ютерні науки

description: In this presentation we will be talking about SPICE project and its goal to provide a complete open source solution for remote access to virtual machines. It will be described how SPICE works and the recent improvements over video streaming.

uk: вхід без авторизації

name: SPICE: New ways to remote desktops with GStreamer integration


uk: Комп'ютерні науки

description: Bei Null oder mit einem Klon des Monolithen anfangen? Kurze Entwicklungszyklen ermöglichen? Wie ungenutzten Anwendungscode, ungenutzte Pakete, Datenbanktabellen und andere ungenutzte Assets finden? Wie gemeinsam genutzte Ressourcen aufteilen? Erfahrungen, Anregungen und ein Open Source-Tool zur Unterstützung.

uk: вхід без авторизації

name: Extraktion von Microservices aus einem Monolithen


uk: Комп'ютерні науки

description: Kubernetes is a powerful system to build and operate a modern cloud-native infrastructure. Monitoring with Prometheus ensures that Kubernetes stays healthy. Prometheus is a stateful application, so operating it in a cloud native environment can be a challenging task. The Prometheus Operator makes running highly available Prometheus clusters, and even an entire end to end monitoring pipeline, easily manageable. Max will explain the functionality of the Prometheus Operator and describe a desirable end-to-end monitoring stack, including alerts and dashboards.

uk: вхід без авторизації

name: End-to-end monitoring with the Prometheus Operator


Rise and Fall of Bananian Linux

uk: Комп'ютерні науки

description: Bis Mitte 2014 hatte ich nie ein (eigenständiges) Open Source Projekt veröffentlicht und hatte es eigentlich auch nicht vor. Doch dann kam irgendwie alles anders als geplant. Ich kaufte mir ein ARM Development Board, mein erster Banana Pi. Leider musste ich dann feststellen, dass es keine Linux-Distribution für diese Plattform gab, die man guten Gewissens verwenden wollte. Also okay, das bekomme ich hin. Kernel kompilieren und Debian „bootstrappen“. Fertig. Ist irgendwie super geworden – vielleicht kann das noch jemand gebrauchen? Hm. Ich stell‘s mal online! Und damit nahm das Schicksal seinen Lauf...

uk: вхід без авторизації


Eine Einführung in Ontologien

uk: Комп'ютерні науки

description: In letzter Zeit haben Maschine Learning Verfahren sehr viel Aufmerksamkeit, sowohl innerhalb der Wissenschaft als auch außerhalb, erfahren. Dadurch ist ein anderes Werkzeug, dass für bestimmte Probleme sinnvoller sein kann, ein wenig in den Hintergrund gerückt: Ontologien. Der Vortrag stellt das Konzept der Ontologien im Sinne der Informatik anhand verschiedener Anwendungsbeispiele vor.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Dieser Beitrag stellt das System Low Cost Action Photo (LCAP) und die Nutzung von Open Source Software für die Realisierung des Systems vor. LCAP erstellt automatisiert Action-Fotos von Akteuren bei Ausführen einer sportlichen Aktivität. LCAP analysiert und wählt die besten Fotos aus, um diese anschließend dem Akteur in einem Kiosk-System zur Verfügung zu stellen. Benutzer werden anhand von RFID Transpondern identifiziert. Als Anwendungsbeispiel für das System wurde eine Basketball-Station in einem Trampolinpark gewählt. Ziel des wissenschaftlichen Projekts ist der Entwurf einer Architektur und dem Demonstrieren der Machbarkeit anhand einer beispielhaften Umsetzung und einem Test mit Nutzerinnen und Nutzern.

uk: вхід без авторизації

name: LCAP - Low Cost Action Photos auf Open Source Basis


GitLab-CI und Docker Registry

uk: Комп'ютерні науки

description: Ein Erfahrungsbericht über die Einführung von GitLab-CI mit Docker Registry.

uk: вхід без авторизації


Containing Containers?

uk: Комп'ютерні науки

description: Der Vortrag gibt einen kurzen Überblick über Container auf Docker-Basis, den aktuellen Stand der Entwicklung und setzt den Fokus darauf, was sich hier im letzten Jahr im Hinblick auf Sicherheitsaspekte getan hat.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Distributing and deploying software inside (Docker-) containers for security, isolation and ease of use is the new big thing. But once you got all your services nicely wrapped - who takes care of all these containers? The open source project Kubernetes, originating from Google, helps you manage containerized applications, as the operating system of your datacenter, treating hundreds of machines as a single resource pool. This talk introduces the core concepts of Kubernetes, its benefits and its huge ecosystem and gives you an idea of how Google controls parts of their gigantic infrastructure.

uk: вхід без авторизації

name: Intro to Kubernetes: Rethink scalable infrastructure with containers


Sieben Deployment Sünden

uk: Комп'ютерні науки

description: Habt ihr etwas zu gestehen? Oder seid ihr euch noch nicht sicher, was es ist — obwohl ihr wisst, dass irgendetwas nicht so funktioniert wie es sollte? In dieser Präsentation besprechen wir gängige Deployment Sünden und wie man sie vermeiden kann: * Völlerei: Ich brauche möglichst viele oder möglichst große Dependencies. * Habgier: Ja, ich will den größten und langsamsten Application Server verwenden. * Trägheit: Continuous Deployment oder Delivery — wer braucht das schon?! * Wollust: Natürlich verwende ich Container, Microservices und die neuesten Trends in jedem Projekt! * Hochmut: Sobald der Code in Produktion ist, ist es ein Problem der Systemadministratoren. * Neid: Warum sollte ich nicht das Rad neu erfinden? Nur meine Implementierung erfüllt genau meine Anforderungen. * Rachsucht: Logging und Monitoring braucht man nur, wenn man keine guten Nerven hat.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Berlyne is free software and lets you create problems, following the principles of problem based learning. Berlyne can be used to host authentic Capture The Flag competitions in your own infrastructure. This talk explains what problem based learning is (and why it works well in IT security education), how to use Berlyne and how to extend it with own problems.

uk: вхід без авторизації

name: Hosting CTFs with Berlyne: Problem based learning in IT security


uk: Комп'ютерні науки

description: Linux verwaltet Zugriffsrechte als Erlaubnis zum Lesen ("r"), Schreiben ("w") und Ausführen ("x") für den Eigentümer ("u"), die Gruppe ("g") und alle anderen ("o"). So haben alle Anwendungen für einen Benutzer die gleichen Rechte, das ist aber oft nicht sinnvoll: Mein Mail-Client muss mein Adressbuch lesen und ändern können, aber warum soll z.B. mein Browser das tun dürfen? Die Kernel-Erweiterungen "SELinux" ("Security-Enhanced Linux") und "AppArmor" ("Application Armor") ändern das: Sie prüfen alle Zugriffe der Anwendungen und blockieren, was in der eingerichteten Sicherheitspolitik nicht vorgesehen ist. Im Vortrag werden diese beiden Systeme vorgestellt und die grundlegenden Admininistrations-Aufgaben beschrieben: - den Status der Komponente bestimmen und ändern (an- und ausschalten), - die eingestellte Politik anzeigen lassen und kontrollieren, - die Zugriffs-Erlaubnisse ändern, - die Defaults (der Distribution) an die geänderte Anwendungs-Konfiguration (Port, Data Directory, ...) anpassen (statt die Zugriffskontrolle einfach abzuschalten).

uk: вхід без авторизації

name: SELinux und AppArmor: Wenn rwx mit ugo zu ungenau ist


uk: Комп'ютерні науки

description: According to the Gartner Hype Cycle Machine Learning is currently at the peak of being hyped. Scanning current press publications we can find anything from Elon Musk warning about AI being the biggest existential threat to humanity, scientists fooling machine learning models with seemingly tiny modifications to street signs, machine learning enhancing smart phone pictures, as well as introductory material trying to explain what machine learning is about. According to Wikipedia "Machine learning is the subfield of computer science that, according to Arthur Samuel, gives "computers the ability to learn without being explicitly programmed." This keynote will detail what it takes to build a successful machine learning pipeline. We will explore some examples of how machine learning has evolved over the last twenty years and close with highlighting some of the implications that new machine learning based systems have.

uk: вхід без авторизації

name: Teaching machines new tricks: Machine learning: Silver bullet or route to evil?


Linux kernel debugging for sysadmins

uk: Комп'ютерні науки

description: A deeper understanding of linux kernel would help sysadmins to debug issues, tune systems and provide better root cause analysis. This talk would provide insights on investigative methods and tools, that can be used by Linux Admins to understand a bit more about the systems they manage.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Verschlüsselte Kommunikation, Anonymität im Netz, digitale Teilhabe - es gibt viele Open-Source-Tools, die unsere Freiheit im Netz bewahren helfen. Aber obwohl diese Werkzeuge so wichtig sind, ist es oft schwer, finanzielle Unterstützung für die Entwicklung zu bekommen, die Werkzeuge nachhaltig zu machen und Communitys um sie herum zu entwickeln. Wir vom Prototype Fund wollen euch nicht nur dabei helfen - wir wollen auch unsere Erfahrungen mit euch teilen, was einen guten Projektvorschlag ausmacht, um an Unterstützung zu kommen.

uk: вхід без авторизації

name: Funding für Open Source – Wer, Wie und Warum?: Tipps und Tricks vom Prototype Fund


uk: Комп'ютерні науки

description: Viele Unternehmen halten krampfhaft an ihren gewohnten, proprietären Produkten fest. Sind Mitarbeiter dann einmal sehr mutig oder Ist der Schmerz doch einmal so groß, dass eine neue Technologie Einzug halten darf ist weiterhin viel Überzeugungsarbeit zu leisten, um diese erfolgreich zu etablieren und aufrecht zu erhalten.

uk: вхід без авторизації

name: Herausforderungen bei der Einführung von Open Source Technologien in Unternehmen: Am Beispiel der Einführung von Containerisierung in der Finanzdienstleistungsbranche


Relax-and-Recover Automated Testing

uk: Комп'ютерні науки

description: Relax-and-Recover Automated Testing is a sub-project of Relax-and-Recover to perform fully automated recovery tests without human intervention. This way we can quickly verify every unstable release and test each commit as soon as it fits us.

uk: вхід без авторизації

name: Free and Open Source Software Conference (FrOSCon) e.V.


uk: Комп'ютерні науки

description: Dieser Talk handelt von verschwimmenden Grenzen und Zonen in der Welt automatisierter Tests. In welchen Situationen neigen wir Entwickler schnell zu "zu viel" Testing und welche Codestellen werden nur zu gerne vernachlässigt? Was ist ein absolutes No-Go und wann bewegen wir uns vielleicht gerade in einer Grauzone? Im Talk werden zwar Beispiele aus dem PHP Umfeld gezeigt und auch ein paar Lesetipps für symfony Entwickler gegeben doch mit nur wenig Übertragungsleistung sind auch Inspirationen für Entwickler im Umfeld anderer Programmiersprachen dabei!

uk: вхід без авторизації

name: Die Testing-Zonen: Dos und Don’ts des automatisierten Testings


uk: Комп'ютерні науки

description: The talk is about an operator’s view of his profession, an apology rather, in the sense of being an apology that G.H. Hardy wrote about, in his book A Mathematician’s Apology.

uk: вхід без авторизації

name: The little bot that wasn't: An operator's apology


uk: Комп'ютерні науки

description: Internet of Things is a toolbox, and thus it can be used for good and for bad. Issues range from insecure components and privacy invading business models to issues about regulation and culture. With a hacker mindset and my own home and body I’ve explored doing IoT in an ethical, secure and fun way.

uk: вхід без авторизації

name: IoT ethics: what I found out using my home and body as a test lab


uk: Комп'ютерні науки

description: Seit der Einführung von nativer Replikation mit Version 9.0 im Jahr 2010 hat PostgreSQL mit jeder neuen Version Verbesserungen und weitere Möglichkeiten bei der Replikation im Speziellen als auch in anderen Bereichen im Allgemeinen erhalten. Durch die traditionell umfangreiche Abdeckung von SQL-Features und Anbindungen an verschiedene Programmiersprachen, das inzwischen eingeführte Erweiterungs-System sowie die Zusammenarbeit mit externen Projekten ist heutzutage ein stabiler, performanter und auch hochverfügbarer Betrieb von Unternehmens-kritischen Datenbanken möglich.

uk: вхід без авторизації

name: PostgreSQL in der Praxis: Replikation und Hochverfügbarkeit


Clean Code: Benefits Code Refactoring

uk: Комп'ютерні науки

description: Welches sind die ersten Schritte in einem bestehenden Projekt, um mithilfe von Clean Code die Software-Qualität zu steigern?

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Transparently and securely use your existing keys to sign and encrypt ODF documents, using public key cryptography

uk: вхід без авторизації

name: gpg4libre - OpenPGP signing & encryption in LibreOffice


uk: Комп'ютерні науки

description: GNOME is a desktop that cares about its users and their freedom. To be free also includes to have the freedom to use your computer without having to fear of getting compromised or anyone listening to your communication. GNOME takes tries hard to put the user back into the control seat regarding security and privacy. We will see two examples of how GNOME gives you back that control. The first is a classic: The problem of signing OpenPGP keys. The second is the protection against malicious USB devices.

uk: вхід без авторизації

name: Towards a more secure operating system without sacrificing usability: The GNOME challenge


Domain Driven Design damals und heute

uk: Комп'ютерні науки

description: Seit Erscheinen des Referenzwerks "Domain Driven Design" von Eric Evans sind nun schon etwa 13 Jahre vergangen. Doch trotzdem scheint das Thema momentan aktuell wie nie zuvor zu sein: Dank der Vielfalt der technologischen Landschaft und neuer Konzepte wie Microservices und Event Sourcing scheint eine DDD Renaissance angebrochen zu sein.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Kotlin ist eine statisch typisierte Programmiersprache für die JVM und verspricht, wie viele andere auch, ein Plus an Sicherheit, Lesbarkeit und Produktivität. Aber der Einsatz neuer Technologien und Sprachen in eine bestehende Landschaft kann entweder zu einer Big-Bang Lösung oder zu einer Integrations-Hölle ausarten. Hier glänzt Kotlin mit dem Hohen Grad an Interoperabilität von und zu Java . In diesem Vortrag werden kurz die Vorteile der Nutzung von Kotlin erläutert um anschließend im Hauptteil die Kompatibilität in einem gemischten Java/Kotlin Projekt auf „Herz und Nieren“ zu prüfen. Abschließend werden noch Erfahrungen aus bereits in Produktion befindlichen Java/Kotlin Projekten berichtet.

uk: вхід без авторизації

name: Kotlin in Produktion: Integration in die Java Landschaft


uk: Комп'ютерні науки

description: In diesem Talk werde ich zeigen, wie man mit Dropwizard und Swagger mit einfachen mitteln REST-APIs bauen kann und diese auch gleich kommentieren kann.

uk: вхід без авторизації

name: Einfache REST-APIs mit Dropwizard und Swagger


Flow-Based Programming for JavaScript

uk: Комп'ютерні науки

description: NoFlo is a flow-based programming environment for JavaScript. Originally built for Node.js systems automation, the same visual development tools can also be used for developing full-stack applications from the browser to microcontrollers like Arduino. With NoFlo developers build their applications by wiring data streams together between different pre-built or custom components. The NoFlo environment is fully browser-based and can connect to NoFlo instances running on remote servers, allowing inspection and rewiring of running software.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Concourse ist eine Open Source Continuous Integration Lösung zum selber hosten. Concourse Test-Pipelines werden in Manifesten deklariert, die Jobs laufen in Containern. Zahlreiche Ressource Typen ermöglichen die Integration verschiedenster Dienste.

uk: вхід без авторизації

name: Concourse CI: Continuous Integration mit Pipelines


uk: Комп'ютерні науки

description: Dieser Vortrag stellt TypeScript detailliert vor. Alle relevanten Sprachfeatures inkl. deren Nutzen für die alltägliche Programmierung werden erklärt und mit viel Live-Coding präsentiert. Zusätzlich werden Integrationsmöglichkeiten in bestehende Anwendungen (Frontend und Backend) vorgestellt.

uk: вхід без авторизації

name: TypeScript - Endlich sauberer Code im Frontend


uk: Комп'ютерні науки

description: Der Chip ESP8266 ist eine interessante und kostengünstige Alternative, um sein eigenes Elektronikprojekt via Wi-Fi netzwerktauglich zu machen. Die Firmware NodeMCU bietet die Möglichkeit, mit der Scriptsprache Lua seine Applikation zu programmieren und auf dem Chip ablaufen zu lassen. Innerhalb des Vortrages wird darauf eingegangen, welche Möglichkeiten/Fähigkeiten der ESP8266 für eigene Mikrocontrollerprojekte bietet und wie diese mit der Scriptsprache Lua genutzt werden können.

uk: вхід без авторизації

name: Wi-Fi mit Lua: NodeMCU für ESP8266-Module


uk: Комп'ютерні науки

description: Der Vortrag erläutert die Vorgehensweise bei der Ablösung eines proprietären Betriebssystem (VMS) durch Linux und der Migration der Anwendungen und Datenbanken.

uk: вхід без авторизації

name: Betriebssystemwechsel von VMS nach Linux am Beispiel einer Produktionsumgebung: Betriebssystemwechsel von VMS nach Linux: Migration von Anwendungen am konkreten Fall.


uk: Комп'ютерні науки

description: Überblick über verschiedene Search-Engines aus Open-Source-Komponenten, sowie deren jeweilige Vor- und Nachteile.

uk: вхід без авторизації

name: OpenSource Search Engines: Suchen mit OpenSource-Komponenten


uk: Комп'ютерні науки

description: Hear a war story how trivago migrated a high-throughput Cache from memcached to Apache Cassandra with intermediate success, fulminating failures, surprising Cassandra bugs and a final victory doing 1 million writes per second.

uk: вхід без авторизації

name: Cassandra on Steroids: Migrating from memcached to Cassandra


uk: Комп'ютерні науки

description: Lifecycle Management von SUSE Systemen mit Foreman / Katello im Zusammenspiel mit SaltStack als Configuration Management Umgebung

uk: вхід без авторизації

name: Mehr als nur Puppenspieler: Foreman / Katello herstellerunabhängig


Terraform: Infrastructure as Code

uk: Комп'ютерні науки

description: Hashicorps Terraform ist das Open Source Werkzeug um eine Infrastruktur als Code zu beschreiben. Es benutzt eine deklarative Notation (ähnlich wie Puppet) um verschiedene Ressourcen, so zum Beispiel PaaS-Anwendungen, Serverinstanzen, Datenbanken oder DNS-Einträge sowie ihre Abhängigkeiten untereinander zu definieren. Im Vortrag soll am Beispiel einer kleinen Web-Anwendung gezeigt werden wie der Arbeitsablauf mit Terraform aussieht. Besonders sollen einige neue Funktionen der letzten Releases vorgestellt werden, die die Arbeit im Team und die Organisation größerer Projekte erleichtern.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Im Rahmen möchten wir gerne zeigen, wie mit Hilfe von Ansible das automatisierte Deployment, Orchestration und Configuration Management von Foreman/Katello realisiert werden kann. Wir möchten auch auf die Entwicklung von eigenen Ansible Modulen in Python eingehen, die hier zum Einsatz kommen können

uk: вхід без авторизації


uk: Комп'ютерні науки

description: D.R.Y. Don't repeat yourself (vermeide Wiederholungen) ist das Mantra des pragmatischen Programmieres Andrew Hunt. Konsequent eingesetzt und anhand von Code Beispielen verbessert die Anwendung dieses Axioms automatisch unsere Fähigkeit zu programmieren.

uk: вхід без авторизації

name: D.R.Y. Don't repeat yourself: Refactoring Code with just one simple Design Pattern


uk: Комп'ютерні науки

uk: вхід без авторизації

name: Mit Shell-Skripten zum Kernel-Treiber für neue HW: Aus dem wahren Leben eines SW-Entwicklers

name: Free and Open Source Software Conference (FrOSCon) e.V.


uk: Комп'ютерні науки

description: Was wäre, wenn Du in Deiner Organisation mit steigendem Bedarf an IT für die Server zuständig wärst und den Auftrag bekommen würdest, dass Dienste "immer verfügbar" sein sollen? (Natürlich ausnahmsweise nur mit knappen Budget.)

uk: вхід без авторизації

name: HA-Virtualisierungscluster mit oVirt, DRBD und Gluster


uk: Комп'ютерні науки

description: After this session you should be able to have an idea of how VMs can be run on a Kubernetes cluster.

uk: вхід без авторизації

name: Paving the transition - Herding unicorns VMs on Kubernetes


uk: Комп'ютерні науки

description: Linaro Automated Validation Architecture (LAVA) is without a doubt one of the best currently available tools for managing QA board farms. It is proven to be quite a handy tool for both developers and tests automation engineers. Although it is provided together with extensive documentation, creating first own laboratory might be a challenging task. Does it have to be for every newcomer? During this talk Paweł will guide through the process of setting up own LAVA instance. He will also present how to manage its configuration and how to easily make deployments automated and reproducible.

uk: вхід без авторизації

name: From zero to first test in your own LAVA laboratory: (in less than 45 minutes)


uk: Комп'ютерні науки

description: Starting with a small Puppet deployment in 2009, followed by the spread of Bcfg2 and finally the development and full-scale adoption of BundleWrap, we explore how configuration management at //SEIBERT/MEDIA has changed over the years.

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name: 8 Years of Config Management: a journey through one company's challenges and learnings


uk: Комп'ютерні науки

description: Über die Jahre haben sind verschiedene Designprinzipien, oder "Prinziples of Design", postuliert worden, die es in den Kanon der klassischen Design-Ausbildungen geschafft haben und deren Beachtung zu attraktiveren oder einfacher zu benutzenden Produkten führt. Wenn wir uns einige von diesen Prinzipien beim Entwurf von Software-Systemen vergegenwärtigen, dann werden auch diese besser.

uk: вхід без авторизації

name: Principles of Design in Software Systemen


uk: Комп'ютерні науки

description: Background data migration via MARS on sharded local storage is the key for massive cost savings and even better total performance, compared to big cluster architectures using expensive dedicated storage networks.

uk: вхід без авторизації

name: Cost-Efficient Virtual Petabytes Storage Pools: using MARS


uk: Комп'ютерні науки

description: Selbstfahrende Autos und maschinelles Lernen rücken in den letzten Jahren immer stärker in den Fokus der Öffentlichkeit. Dieser Talk soll die Grundlagen zu genetischen Algorithmen vermitteln und selbst-fahrenden Autos. Im weiteren wird gezeigt wie genetische Algorithmen genutzt werden können um Fahrstrategien im Open-Source Rennsimulator TORCS (The Open Race Car Simulator) zu entwickeln und zu optimieren.

uk: вхід без авторизації

name: Optimizing the Driving Behavior of Self-Driving Cars Using Genetic Algorithms


uk: Комп'ютерні науки

description: Mapnik is an open source toolkit for rendering maps, probably best known for producing the map tiles for openstreetmap.org. It provides a stylesheet language, input handlers for different GIS data formats, and C++ and Python API bindings.

uk: вхід без авторизації

name: Rendering map data with Mapnik and Python


uk: Комп'ютерні науки

description: In this talk I will share some insights, joy and difficulties of open data within the public transport organisations in German speaking countries. Since this is a free software and open source conference, there will be a speacial feature at the end of the talk.

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name: Struggling with open data in public transport


uk: Комп'ютерні науки

description: There are a lot of online services that produce nice maps from OpenStreetMap data, but only very few that generate output suitable for printing. This talk is going to present MapOSMatic, a service that produces large scale single and multi page high resolution maps.

uk: вхід без авторизації

name: Creating printable maps: From OpenStreetMap data to large scale maps on paper


uk: Комп'ютерні науки

description: Tiefenlinien sind für Seekarten unabdingbar, in Openseamap allerdings nicht vorhanden. Um die Tiefenlinien in Openseamap zu integrieren, stehen wir aus Sicht der Autoren vor folgenden Fragestellungen: Wie animieren wir Freizeitkapitäne wie uns, zum Loggen und Upload der Daten? Wie können die Rohdaten sinnvoll in Tiefenlinien überführt werden? Neben unseren Lösungsansätzen, sind wir an weiteren Sichtweisen interessiert und möchten, darauf aufbauend, mit Zustimmung der Community die nächsten Schritte erarbeiten und forcieren.

uk: вхід без авторизації

name: Tiefenlinien in Openseamap: Wie soll es weitergehen?


uk: Комп'ютерні науки

description: Der Vortrag behandelt die Frage was Datenbanken im Sinne des Urheberrechts sind und welche Unsicherheiten hieraus für Geodaten erwachsen.

uk: вхід без авторизації

name: Geodaten als Datenbank und ihre Lizenzierung: Datenbanken aus rechtlicher Sicht


uk: Комп'ютерні науки

uk: вхід без авторизації

name: Micro-Service Geo Daten-Infrastrukturen mit Docker


uk: Комп'ютерні науки

description: MySQL originally only had very rudimentary GIS support. Both MariaDB and recent MySQL releases have improved quite a bit on this front though. We will look at the improvements and at the differences between the two extended implementations.

uk: вхід без авторизації

name: GIS features in MariaDB and MySQL: What has happened in recent years ...


uk: Комп'ютерні науки

description: Erstellung einer plattformunabhängigen Geo-App auf Basis der YAGA Komponenten.

uk: вхід без авторизації

name: Angular 2 Geo-Apps mit YAGA: Leaflet Integration in Angular 2


Get to know OSGeo FOSSGIS FOSS4G OSM

uk: Комп'ютерні науки

description: We would like to introduce you to OSGeo FOSSGIS FOSS4G & OSM. Get information about the projects and learn how you could join the community and get involved.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Mapbender is a client framework for spatial data infrastructures. It provides web based interfaces for displaying, navigating and interacting with OGC compliant services.

uk: вхід без авторизації

name: Create WebMapping Applications with the Geoportal Framework Mapbender


uk: Комп'ютерні науки

description: Wegen Problem mit der Ankuendigung des gaplanten Vortrags "Mit Shell-Skripten zum Kernel-Treiber für neue HW" gab es hier nun die Fortsetzung vom Vortag: (Effizientes) suchen nach inhaltlichen Duplikaten/Dupletten (und löschen bzw. ersetzen durch Links)gab

uk: вхід без авторизації

name: Es muss mal wieder SHELL sein... (Teil 2): Haralds kleine Helferlein: die Shell und mehr

name: Free and Open Source Software Conference (FrOSCon) e.V.


uk: Комп'ютерні науки

description: We have created an ultralight, movable, “immaterial” fogscreen. It is based on the fogscreen mid-air imaging technology. The hand-held unit is roughly the size and weight of an ordinary toaster. If the screen is tracked, it can be swept in the air to create mid-air slices of volumetric objects, or to show augmented reality (AR) content on top of real objects. Interfacing devices and methodologies, such as hand and gesture trackers, camera-based trackers and object recognition, can make the screen interactive. The user can easily interact with any physical object or virtual information, as the screen is permeable. Any real objects can be seen through the screen, instead of e.g., through a video-based augmented reality screen. It creates a mixed reality setup where both the real world object and the augmented reality content can be viewed and interacted with simultaneously. The hand-held mid-air screen can be used e.g., as a novel collaborating or classroom tool for individual students or small groups. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: A hand-held immaterial volumetric display


uk: Комп'ютерні науки

description: A multilayer display is an autostereoscopic display constructed by stacking multiple layers of LC (liquid crystal) panels on top of a light source. It is capable of delivering smooth, continuous, and position-dependent images to viewers within a prescribed viewing zone. However, the images thus delivered may contain artifacts, which are inconsistent with real 3D scenes. For example, objects occluding one another may fuse together, or get obscured in the delivered images. To reduce such artifacts, it is often necessary to narrow the viewing zone. Using a directional rather than a uniform light source is one way to mitigate this problem. In this work, we present another solution to the problem. We propose an integrated architecture of multilayer and lenticular displays, where multiple LC panels are sandwiched between pairs of lenticular sheets. By associating a pair of lenticular sheets with a LC panel, each pixel in the panel is transformed into a view-dependent pixel, which is visible only from a particular viewing direction. Since all pixels in the integrated architecture are view-dependent, the display is partitioned into several sub-displays, each of which corresponds to a narrow viewing zone. The partitioning of display will reduce the possibility that the artifacts are noticeable in the delivered images. We will show several simulation results confirming that the proposed extension of multilayer display can deliver more plausible images than conventional multilayer display. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: A multilayer display augmented by alternating layers of lenticular sheets


uk: Комп'ютерні науки

description: Common stereoscopic 3D (S3D) displays utilize either spatial or temporal interlacing to send different images to each eye. Temporal interlacing sends content to the left and right eyes alternatingly in time, and is prone to artifacts such as flicker, unsmooth motion, and depth distortion. Spatial interlacing sends even pixel rows to one eye and odd rows to the other eye, and has a lower effective spatial resolution than temporal interlacing unless the viewing distance is large. We propose a spatiotemporal hybrid protocol that interlaces the left- and right-eye views spatially, but the rows corresponding to each eye alternate every frame. We performed psychophysical experiments to compare this novel stereoscopic display protocol to existing methods in terms of spatial and temporal properties. Using a haploscope to simulate the three protocols, we determined perceptual thresholds for flicker, motion artifacts, and depth distortion, and we measured the effective spatial resolution. Spatial resolution is improved, flicker and motion artifacts are reduced, and depth distortion is eliminated. These results suggest that the hybrid protocol maintains the benefits of spatial and temporal interlacing while eliminating the artifacts, thus creating a more realistic viewing experience. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: A novel stereoscopic display technique with improved spatial and temporal properties


uk: Комп'ютерні науки

description: In this paper, we present a novel application, 3D+Time Brain View, for the stereoscopic visualization of functional Magnetic Resonance Imaging (fMRI) data gathered from participants exposed to unfamiliar spoken languages. An analysis technique based on Independent Component Analysis (ICA) is used to identify statistically significant clusters of brain activity and their changes over time during different testing sessions. That is, our system illustrates the temporal evolution of participants' brain activity as they are introduced to a foreign language through displaying these clusters as they change over time. The raw fMRI data is presented as a stereoscopic pair in an immersive environment utilizing passive stereo rendering. The clusters are presented using a ray casting technique for volume rendering. Our system incorporates the temporal information and the results of the ICA into the stereoscopic 3D rendering, making it easier for domain experts to explore and analyze the data. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: A stereoscopic system for viewing the temporal evolution of brain activity clusters in response to linguistic stimuli


A variable-collimation display system

uk: Комп'ютерні науки

description: Two important human depth cues are accommodation and vergence. Normally, the eyes accommodate and converge or diverge in tandem; changes in viewing distance cause the eyes to simultaneously adjust both focus and orientation. However, ambiguity between accommodation and vergence cues is a well-known limitation in many stereoscopic display technologies. This limitation also arises in state-of-the-art full-flight simulator displays. In current full-flight simulators, the out-the-window (OTW) display (i.e., the front cockpit window display) employs a fixed collimated display technology which allows the pilot and copilot to perceive the OTW training scene without angular errors or distortions; however, accommodation and vergence cues are limited to fixed ranges (e.g., ~ 20 m). While this approach works well for long-range, the ambiguity of depth cues at shorter range hinders the pilot’s ability to gauge distances in critical maneuvers such as vertical take-off and landing (VTOL). This is the first in a series of papers on a novel, variable-collimation display (VCD) technology that is being developed under NAVY SBIR Topic N121-041 funding. The proposed VCD will integrate with rotary-wing and vertical take-off and landing simulators and provide accurate accommodation and vergence cues for distances ranging from approximately 3 m outside the chin window to ~ 20 m. A display that offers dynamic accommodation and vergence could improve pilot safety and training, and impact other applications presently limited by lack of these depth cues. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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uk: Комп'ютерні науки

description: Stereoscopic gaming is a popular source of content for consumer 3D display systems. There has been a significant shift in the gaming industry towards casual games for mobile devices running on the Android™ Operating System and driven by ARM™ and other low power processors. Such systems are now being integrated directly into the next generation of 3D TVs potentially removing the requirement for an external games console. Although native stereo support has been integrated into some high profile titles on established platforms like Windows PC and PS3 there is a lack of GPU independent 3D support for the emerging Android platform. We describe a framework for enabling stereoscopic 3D gaming on Android for applications on mobile devices, set top boxes and TVs. A core component of the architecture is a 3D game driver, which is integrated into the Android OpenGL™ ES graphics stack to convert existing 2D graphics applications into stereoscopic 3D in real-time. The architecture includes a method of analyzing 2D games and using rule based Artificial Intelligence (AI) to position separate objects in 3D space. We describe an innovative stereo 3D rendering technique to separate the views in the depth domain and render directly into the display buffer. The advantages of the stereo renderer are demonstrated by characterizing the performance in comparison to more traditional render techniques, including depth based image rendering, both in terms of frame rates and impact on battery consumption. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: Architecture for high performance stereoscopic game rendering on Android


uk: Комп'ютерні науки

description: In this paper we present algorithms for automatically detecting issues specific to converted S3D content. When a depth-image-based rendering approach produces a stereoscopic image, the quality of the result depends on both the depth maps and the warping algorithms. The most common problem with converted S3D video is edge-sharpness mismatch. This artifact may appear owing to depth-map blurriness at semitransparent edges: after warping, the object boundary becomes sharper in one view and blurrier in the other, yielding binocular rivalry. To detect this problem we estimate the disparity map, extract boundaries with noticeable differences, and analyze edge-sharpness correspondence between views. We pay additional attention to cases involving a complex background and large occlusions. Another problem is detection of scenes that lack depth volume: we present algorithms for detecting at scenes and scenes with at foreground objects. To identify these problems we analyze the features of the RGB image as well as uniform areas in the depth map. Testing of our algorithms involved examining 10 Blu-ray 3D releases with converted S3D content, including Clash of the Titans, The Avengers, and The Chronicles of Narnia: The Voyage of the Dawn Treader. The algorithms we present enable improved automatic quality assessment during the production stage. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: Automatic detection of artifacts in converted S3D video


uk: Комп'ютерні науки

description: Though theoretically superior, 3D video systems did not yet achieve a breakthrough in laparoscopic surgery. Furthermore, visual alterations, such as eye strain, diplopia and blur have been associated with the use of stereoscopic systems. Advancements in display and endoscope technology motivated a re-evaluation of such findings. A randomized study on 48 test subjects was conducted to investigate whether surgeons can benefit from using most current 3D visualization systems. Three different 3D systems, a glasses-based 3D monitor, an autostereoscopic display and a mirror-based theoretically ideal 3D display were compared to a state-of-the-art 2D HD system. The test subjects split into a novice and an expert surgeon group, which high experience in laparoscopic procedures. Each of them had to conduct a well comparable laparoscopic suturing task. Multiple performance parameters like task completion time and the precision of stitching were measured and compared. Electromagnetic tracking provided information on the instruments path length, movement velocity and economy. The NASA task load index was used to assess the mental work load. Subjective ratings were added to assess usability, comfort and image quality of each display. Almost all performance parameters were superior for the 3D glasses-based display as compared to the 2D and the autostereoscopic one, but were often significantly exceeded by the mirror-based 3D display. Subjects performed the task at average 20% faster and with a higher precision. Work-load parameters did not show significant differences. Experienced and non-experienced laparoscopists profited equally from 3D. The 3D mirror system gave clear evidence for additional potential of 3D visualization systems with higher resolution and motion parallax presentation. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: Comprehensive evaluation of latest 2D/3D monitors and comparison to a custom-built 3D mirror-based display in laparoscopic surgery


uk: Комп'ютерні науки

description: Full-parallax light field displays utilize a large volume of data and demand efficient real-time compression algorithms to be viable. Many compression techniques have been proposed. However, such solutions are impractical in bandwidth, processing or power requirements for a real-time implementation. Our method exploits the spatio angular redundancy in a full parallax light field to compress the light field image, while reducing the total computational load with minimal perceptual degradation. Objective analysis shows that depending on content, bandwidth reduction from two to four orders of magnitude is possible. Subjective analysis shows that the compression technique produces images with acceptable quality, and the system can successfully reproduce the 3D light field, providing natural binocular and full motion parallax. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

uk: вхід без авторизації

name: Compression for full-parallax light field displays


uk: Комп'ютерні науки

description: CONTEXT: In recent years, the problem of acquiring omnidirectional stereoscopic imagery of dynamic scenes has gained commercial interest and, consequently, new techniques have been proposed to address this problem [1]. The goal of many of these novel panoramic methods is to provide practical solutions for acquiring real-time omnidirectional stereoscopic imagery suitable to stimulate binocular human stereopsis in any gazing direction [2][3]. In particular, methods based on the acquisition of partially overlapped stereoscopic snapshots of the scene are the most attractive for real-time omnistereoscopic capture [1]. However, there is a need to rigorously model these acquisition techniques in order to provide useful design constraints for the corresponding omnidirectional stereoscopic systems. OBJECTIVE: Our main goal in this work is to propose an omnidirectional camera model, which is sufficiently flexible to describe a variety of omnistereoscopic camera configurations. We have developed a projective camera model suitable to describe a range of omnistereoscopic camera configurations and usable to determine constraints relevant to the design of omnistereoscopic acquisition systems. In addition, we applied our camera model to estimate the system constraints for the rendering approach based on mosaicking partially overlapped stereoscopic snapshots of the scene. METHOD: First, we grouped the possible stereoscopic panoramic methods, suitable to produce horizontal stereo for human viewing in every azimuthal direction, into four camera configurations. Then, we propose an omnistereoscopic camera model based on projective geometry which is suitable for describing each of the four camera configurations. Finally, we applied this model to obtain expressions for the horizontal and vertical disparity errors encountered when creating a stereoscopic panorama by mosaicking partial stereoscopic snapshots of the scene. RESULTS: We simulated the parameters of interest using the proposed geometric model combined with a ray tracing approach for each camera model. From these simulations, we extracted conclusions that can be used in the design of omnistereoscopic cameras for the acquisition of dynamic scenes. One important parameter used to contrast different camera configurations is the minimum distance to the scene to provide a continuous perception of depth in any gazing direction after mosaicking partial stereoscopic views. The other important contribution is to characterize the vertical disparities that cause ghosting at the stitching boundaries between mosaics. In the simulation, we studied the effect of the field-of-view of the lenses, and the pixel size and dimension of the sensor in the design of the system. NOVELTY: The main contribution of this work is to provide a tractable method for analyzing multiple camera configurations intended for omnistereoscopic imaging. In addition, we estimated and compared the system constraints to attain a continuous depth perception in all azimuth directions. Also important for the rendering process, we characterized mathematically the vertical disparities that would affect the mosaicking process in each omnistereoscopic configuration. This work complements and extends our previous work in stereoscopic panoramas acquisition [1][2][3] by proposing a mathematical framework to contrast different omnistereoscopic image acquisition strategies.

uk: вхід без авторизації

name: Depth consistency and vertical disparities in stereoscopic panoramas


uk: Комп'ютерні науки

description: We present a description of a time sequential stereoscopic display which separates the images using a segmented polarization switch and passive eyewear. Additionally, integrated tracking cameras and an SDK on the host PC allow us to implement motion parallax in real time. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: Stereoscopic display system with integrated motion parallax and direct manipulation


uk: Комп'ютерні науки

description: This paper investigates the presentation of moving stereo images on different display devices. We address three important issues. First, we propose temporal compensation for the Pulfrich effect when using anaglyph glasses. Second, we describe, how content-adaptive capture protocols can reduce false motion-in-depth sensation for time-multiplexing based displays. Third, we conclude with a recommendation how to improve rendering of synthetic stereo animations. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: Estimating impact of stereo 3D display technology on depth perception


uk: Комп'ютерні науки

description: A large-screen autostereoscopic display enables life-size realistic communication. In this study, we propose the tiling of frameless multi-view display modules employing flat-panel displays. A flat-panel multi-view display and an imaging system with a magnification greater than one are combined to construct a multi-view display module with a frameless screen. The module screen consists of a lens and a vertical diffuser to generate viewpoints in the observation space and to increase the vertical viewing zone. When the modules are tiled, the screen lens should be appropriately shifted to produce a common viewing area for all modules. We designed and constructed the multi-view display modules, which have a screen size of 27.3 in. and a resolution of 320 × 200. The module depth was 1.5 m and the number of viewpoints was 144. The viewpoints were generated with a horizontal interval of 16 mm at a distance of 5.1 m from the screen. Four modules were constructed and aligned in the vertical direction to demonstrate a middle-size screen system. The tiled screen had a screen size of 62.4 in. (589 mm × 1,472 mm). The prototype system can display almost human-size objects. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

uk: вхід без авторизації

name: Frameless multiview display modules employing flat-panel displays for a large-screen autostereoscopic display


uk: Комп'ютерні науки

description: With the recent advent in 3D display technology, there is an increasing need for conversion of existing 2D content into rendered 3D views. We propose a fully automatic 2D to 3D conversion algorithm that assigns relative depth values to the various objects in a given 2D image/scene and generates two different views (stereo pair) using a Depth Image Based Rendering (DIBR) algorithm for 3D displays. The algorithm described in this paper creates a scene model for each image based on certain low-level features like texture, gradient and pixel location and estimates a pseudo depth map. Since the capture environment is unknown, using low-level features alone creates inaccuracies in the depth map. Using such flawed depth map for 3D rendering will result in various artifacts, causing an unpleasant viewing experience. The proposed algorithm also uses certain high-level image features to overcome these imperfections and generates an enhanced depth map for improved viewing experience. Finally, we show several 3D results generated with our algorithm in the results section. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: Fully automatic 2D to 3D conversion with aid of high-level image features


uk: Комп'ютерні науки

description: This paper proposes a method for constructing a reasonable scale of end-to-end free-viewpoint video system that captures multiple view and depth data, reconstructs three-dimensional polygon models of objects, and display them on virtual 3D CG spaces. This system consists of a desktop PC and four Kinect sensors. First, multiple view plus depth data at four viewpoints are captured by Kinect sensors simultaneously. Then, the captured data are integrated to point cloud data by using camera parameters. The obtained point cloud data are sampled to volume data that consists of voxels. Since volume data that are generated from point cloud data are sparse, those data are made dense by using global optimization algorithm. Final step is to reconstruct surfaces on dense volume data by discrete marching cubes method. Since accuracy of depth maps affects to the quality of 3D polygon model, a simple inpainting method for improving depth maps is also presented.

uk: вхід без авторизації

name: Integration of multiple view plus depth data for free viewpoint 3D display


uk: Комп'ютерні науки

description: Background In recent years 3D-enabled televisions, VR headsets and computer displays have become more readily available in the home. This presents an opportunity for game designers to explore new stereoscopic game mechanics and techniques that have previously been unavailable in monocular gaming. Aims To investigate the visual cues that are present in binocular and monocular vision, identifying which are relevant when gaming using a stereoscopic display. To implement a game whose mechanics are so reliant on binocular cues that the game becomes impossible or at least very difficult to play in non-stereoscopic mode. Method A stereoscopic 3D game was developed whose objective was to shoot down advancing enemies (the Interlopers) before they reached their destination. Scoring highly required players to make accurate depth judgments and target the closest enemies first. A group of twenty participants played both a basic and advanced version of the game in both monoscopic 2D and stereoscopic 3D. Results The results show that in both the basic and advanced game participants achieved higher scores when playing in stereoscopic 3D. The advanced game showed that by disrupting the depth from motion cue the game became more difficult in monoscopic 2D. Results also show a certain amount of learning taking place over the course of the experiment, meaning that players were able to score higher and finish the game faster over the course of the experiment. Conclusions Although the game was not impossible to play in monoscopic 2D, participants results show that it put them at a significant disadvantage when compared to playing in stereoscopic 3D. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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name: Interlopers 3D: experiences designing a stereoscopic game


uk: Комп'ютерні науки

description: CONTEXT: We present a technique for achieving tracked vertical parallax for multiple users for a variety of autostereoscopic projector array setups including front- and rear- projection, and curved display surfaces. This “hybrid parallax” approach allows for immediate horizontal parallax as viewers move left and right, and tracked parallax as they move up and down, allowing cues such as 3D perspective and eye contact to be conveyed faithfully. OBJECTIVE: Projector arrays are well suited for 3D displays because of their ability to generate dense and steerable arrangements of pixels. We have developed a new autostereoscopic display utilizing a single dense row of 69 pico projectors. The projectors are focused on a 30x30cm vertically anisotropic screen that scatters the light from each lens into a vertical stripe while preserving horizontal angular variation. Each viewer’s eye observes the combined effect of image stripes from multiple projectors which combine to form a seamless 3D image. As every viewer sees a different 3D image, it is possible to customize each view with a different vertical perspective. Given a sparse set of tracked viewer positions, the challenge is to create a continuous estimate of viewer height and distance for all potential viewing angles to provide consistent vertical perspective to both tracked and untracked viewers. METHOD: Rendering to a dense projector display requires multiple-center of projection imagery, as adjacent projector pixels diverge to different viewer positions. If you assume constant viewer height and distance for each projector, viewers may see significant cross-talk and geometric distortion particularly when multiple viewers are in close proximity. We solve this problem with a custom GPU vertex shader projection that dynamically interpolates multiple viewer heights and distances within each projector frame. Thus, each projector’s image is rendered in a distorted manner representing multiple centers of projection, and might show an object from above on the left and from below on the right. RESULTS: We use a low-cost RGB depth sensor to simultaneously track multiple viewer head positions in 3D and interactively update the imagery sent to the array. Even though each user sees slices of multiple projectors, the perceived 3D image is consistent and smooth from any vantage point with reduced cross-talk. This rendering framework also frees us to explore different projector configurations including front and rear- mounted projector arrays and non-flat screens. Our rendering algorithm does not add significant overhead enabling realistic dynamic scenes. Our display produces full color autostereoscopic 3D imagery, with zero horizontal latency, and a wide 110o field of view which can accommodate numerous viewers. NOVELTY: While user tracking has long been used for single-user glasses displays, and single-user autosteroscopic display [Perlin et al. 2000] in order to update both horizontal and vertical parallax, our system is the first autostereoscopic projector array to incorporate tracking for vertical parallax. Our method could be adapted to other projector arrays [Rodriguez et al. 2007, Kawakita et al 2012, Kovacs and Zilly 2012, Yoshida et al 2011]. Furthermore, our display is reproducible with off-the-shelf projectors, screen materials, graphics cards, and video splitters.

uk: вхід без авторизації

name: Interpolating vertical parallax for an autostereoscopic 3D projector array


uk: Комп'ютерні науки

description: Light field cameras are attracting much attention as tools for acquiring 3D information of a scene through a single camera. The main drawback of typical lenselet-based light field cameras is the limited resolution. This limitation comes from the structure where a microlens array is inserted between the sensor and the main lens. The microlens array projects 4D light field on a single 2D image sensor at the sacrifice of the resolution; the angular resolution and the position resolution trade-off under the fixed resolution of the image sensor. This fundamental trade-off remains after the raw light field image is converted to a set of sub-aperture images. The purpose of our study is to estimate a higher resolution image from low resolution sub-aperture images using a framework of super-resolution reconstruction. In this reconstruction, these sub-aperture images should be registered as accurately as possible. This registration is equivalent to depth estimation. Therefore, we propose a method where super-resolution and depth refinement are performed alternatively. Most of the process of our method is implemented by image processing operations. We present several experimental results using a Lytro camera, where we increased the resolution of a sub-aperture image by three times horizontally and vertically. Our method can produce clearer images compared to the original sub-aperture images and the case without depth refinement. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

uk: вхід без авторизації

name: Joint estimation of high resolution images and depth maps from light field cameras


uk: Комп'ютерні науки

description: This research aims to develop an auto-stereoscopic display, which satisfies the conditions required for practical use, such as, high resolution and large image size comparable to ordinary display devices for television, arbitrary viewing position, multiple viewer availability, suppression of nonuniform luminance distribution, and compact system configuration. In the proposed system, an image display unit is illuminated with a direction-controlled illumination unit, which consists of a spatially modulated parallel light source and a steering optical system. The steering optical system is constructed with a slanted cylindrical array and vertical diffusers. The direction-controlled illumination unit can control output position and horizontal angle of vertically diffused light. The light from the image display unit is controlled to form narrow exit pupil. A viewer can watch the image only when an eye is located at the exit pupil. Auto-stereoscopic view can be achieved by alternately switching the position of an exit pupil at viewer's both eyes, and alternately displaying parallax images. An experimental system was constructed to verify the proposed method. The experimental system consists of a LCD projector and Fresnel lenses for the direction-controlled illumination unit, and a 32 inch full-HD LCD for image display. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

uk: вхід без авторизації

name: Multi-user autostereoscopic display based on direction-controlled illumination using a slanted cylindrical lens array


uk: Комп'ютерні науки

description: Displays supporting stereoscopic and head-coupled motion parallax can enhance human perception of containing 3D surfaces and 3D networks but less for so volumetric data. Volumetric data is characterized by a heavy presence of transparency, occlusion and highly ambiguous spatial structure. There are many different rendering and visualization algorithms and interactive techniques that enhance perception of volume data and these techniques‟ effectiveness have been evaluated. However, how VR display technologies affect perception of volume data is less well studied. Therefore, we conduct two formal experiments on how various display conditions affect a participant‟s depth perception accuracy of a volumetric dataset. Our results show effects of VR displays for human depth perception accuracy for volumetric data. We discuss the implications of these finding for designing volumetric data visualization tools that use VR displays. In addition, we compare our result to previous works on 3D networks and discuss possible reasons for and implications of the different results. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

uk: вхід без авторизації

name: Stereo and motion cues effect on depth judgment of volumetric data