uk: Комп'ютерні науки

description: The Locarno area (Switzerland, Canton Ticino) is exposed to lake floods with a return period of about 7-8 years. The risk is of particular concern because the area is located in a floodplain that registered in the last decades a great increase in settlement and values of the real estates. Moreover small differences in lake altitude may produce a significant increase in flooded area due to the very low average slope of the terrain. While fatalities are not generally registered, several important economic costs are associated, e.g.: damages to real estates, interruption of activities, evacuation and relocation and environmental damages. While important events were registered in 1978, 1993, 2000, 2002 and 2014 the local stakeholder invested time and money in the set-up of an up-to-date decision support system that allows for the reduction of risks. Thanks to impressive technological advances the visionary concept of the Digital Earth (Gore 1992, 1998) is being realizing: geospatial coverages and monitoring systems data are increasingly available on the Web, and more importantly, in a standard format. As a result, today is possible to develop innovative decision support systems which mesh-up several information sources and offers special features for risk scenarios evaluation. In agreement with the exposed view, the authors have recently developed a new Web system whose design is based on the Service Oriented Architecture pattern. Open source software (e.g.: Geoserver, PostGIS, OpenLayers) has been used throughout the whole system and geospatial Open Standards (e.g.: SOS, WMS, WFS) are the pillars it rely on. SITGAP 2.0, implemented in collaboration with the Civil protection of Locarno e Vallemaggia, combines a number of data sources such as the Federal Register of Buildings and Dwellings, the Cantonal Register of residents, the Cadastral Surveying, the Cantonal Hydro-meteorological monitoring observations, the Meteoswiss weather forecasts, and others. As a result of this orchestration of data, SITGAP 2.0 serves features that allows, for example, to be informed on active alarms, to visualize lake level forecasts and associated flooding areas, to evaluate and map exposed elements and people, to plan and manage evacuation by searching for people living in particular areas or buildings, by registering evacuation actions and by searching for evacuated people. System architecture and functionalities, and consideration on the integration and accessibility of the beneath information together with the lesson learnt during the usage of the system during the last floods of November 2014, provides interesting discussion points for the identification of current and future needs.

uk: вхід без авторизації

name: Open Source and Open Standard based decision support system: the example of lake Verbano floods management.


Anders Dahlgren

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: Sweden is a sparsely populated country. Normally market forces would regulate the number and location of both public and commercial services as schools, medical care, grocery stores and pharmacies. In sparsely populated areas these forces does not work. The Swedish government has realized this and gives economical support to some services in order to maintain or in some cases expand the service level. The aim with this grants is to provide conditions for living, working and contribute to economic growth in these in remote areas. To be as effective as possible a decision making system has been developed to support the administrators of the grant. The system allows the administrators to monitor the current situation, update changes in the service structure and simulate fictive scenarios. The system is built on an open source platform and is available through the internet to authorized administrators on the regional level of the Swedish administration. As platform for the system the following open source projects and formats are used GeoExt, Ext JS, Openlayers, Mapfish, Pylons, GEOAlchemy, Mapserver, PostGIS, GeoJSON.

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: Decision-making system for grants for maintaning services in rural areas

type: Organization

name: Open Source Geospatial Foundation (OSGeo)

cs: Video

de: Video

fi: Video

uk: Відео

en: Video

fr: Vidéo

da: Video

nl: Video

es: Video


uk: Комп'ютерні науки

description: With a dual 'open'-strategy the department of geoinformation at the canton of Zurich/Switzerland opts for a strategic orientation towards open source and open data: Open in the sense of an open web-mapping- infrastructure based on open source components: Mapfish Appserver was developed as a framework for building web map applications using OGC standards and the Mapfish REST protocol. It is freely available under the new BSD-license (http://mapfish-appserver.github.io/). The Ruby on Rails gem comes with the following out-of-the box features: - Organize maps by topics, categories, organisational units, keywords and more - Combine maps with background and overlay topics with adjustable opacity - Import UMN Mapserver mapfiles to publish new topics within seconds - Fully customizable legends and feature infos - Creation of complex custom searches - Rich digitizing and editing functionality - Role-based access control on topic, layer and attribute level - Access control for WMS and WFS - Rich library of ExtJS 4 based map components - Multiple customizable viewers from minimal mobile viewer to full featured portal - Multi-site support - Built-in administration backend - Self-organized user groups maps.zh.ch, the official geodata-viewer of the canton of Zurich, was developed using Mapfish Appserver. It contains more than 100 thematic maps and is considered an indispensable working tool for everyone working with spatial data in the canton of Z?rich/Switzerland. 'Open' in the sense of Open Government Data: Zurich is the first canton participating in the national open data portal opendata.admin.ch. The portal has the function of a central, national directory of open data from different backgrounds and themes. This makes it easier to find and use appropriate data for further projects. The department of geoinformatics aims to open as many geo-datasets as possible for the public by publishing them on the national OGD-portal. The open geodata is issued in form of web services ? Web Map Services (WMS), WebFeature Services (WFS) and Web Coverage Services (WCS) - and contains a wide range of geodata from the fields of nature conservation, forestry, engineering, infrastructure planning, statistics to high resolution LIDAR-data.

uk: вхід без авторизації

name: Use case of a dual open strategy in the canton of Zurich/Switzerland


uk: Комп'ютерні науки

description: OpenDroneMap is an open source toolkit for processing drone imagery. From raw imagery input, it outputs a georeferenced pointcloud, mesh, and orthophoto. This is a powerful toolkit to change unreferenced arbitrary images into geographic data. Next steps in the project are needed to improve optimization of underlying algorithms, steps to better create meshes / textured meshes from the resultant pointclouds by explicitly modeling surfaces, and to make better output data from lower quality inputs. Come and see where the project is at, how the state of the art is advancing, and how you can use it and contribute.

uk: вхід без авторизації

name: OpenDroneMap, Next Steps: Toward optimization and better 3D modeling


Opening Address Data around the World

uk: Комп'ютерні науки

description: With over 110 million points, OpenAddresses.io has grown to be the largest open database of address data in the world. Governments, developers and businesses are realizing that address data belongs in a commons where it can be easily maintained, used by all, and drive economic growth. These early efforts are now powering some of the world's best commercial geocoding systems, as well as crucial infrastructure like emergency responders. But there's more work to do. We need to reform outdated laws, expand coverage to new cultural contexts, untangle shortsighted licenses, and invent new modes of collaboration between the public and government. We'll cover how OpenAddresses started, how it can be used today, and how we expect it to grow into a definitive global resource.

uk: вхід без авторизації


Open Source for Handling IndoorGML

uk: Комп'ютерні науки

description: In order to respond to increasing demand for indoor spatial information, an OGC standard called IndoorGML, has been recently published. It is an application schema of GML and based on the cellular space model, which represents an indoor space as a set of cells with their geometric, topological, and semantic attributes. Since we are at a beginning stage, very few tools supporting IndoorGML have been developed. In our talk, we will present an open source tool that we have been developing to provide a translating function between IndoorGML and other data formats. For example, it offers a Java package with a set of classes for indoorGML, called JavaIndoorGML. Once IndoorGML documents are mapped to Java instances of classes in JavaIndorGML, we are able to handle indoor spatial information with ease.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: This introduction will give an introduction and live demonstration of the OGC SensorThings API. The OGC SensorThings API provides an open and unified way to interconnect the Internet of Things (IoT) devices, data, and applications over the Web. The OGC SensorThings API is a new OGC standard candidate. Unlike many existing OGC standards, SensorThings API is very simple and efficient. At the same time, it is also comprehensive and designed to handle complex use cases. It builds on a rich set of proven-working and widely-adopted open standards, such as the OGC Sensor Web Enablement (SWE) standards, including the ISO/OGC Observation and Measurement (O&M) and Sensor Observation Services (SOS). The main difference between the SensorThings API and the OGC SOS is that the SensorThings API is designed specifically for the resource-constrained IoT devices and the Web developer community. As a result, the SensorThings API follows the REST principles, the use of an efficient JSON encoding, and the use of the flexible OASIS OData protocol and URL conventions. In addition to introduce the specification, this talk will also demonstrate an end-to-end IoT application based on the SensorUp IoT platform, an open source implementation of the SensorThings API, including a server, javascript library, web dashboard and a Arduino library.

uk: вхід без авторизації

name: Sensor up your connected applications with OGC SensorThings API


uk: Комп'ютерні науки

description: istSOS (http://istsos.org) is an OGC SOS server implementation entirely written in Python. istSOS allows for managing and dispatching observations from monitoring sensors according to the Sensor Observation Service standard. istSOS is released under the GPL License, and should run on all major platforms (Windows, Linux, Mac OS X). The presentation will go through the details of all the new features that will be packed in the next release. In particular the presenters will introduce enhancements that include the Advanced Procedures Status Page and the istSOS Alerts & Web Notification Service. The istSOS Advanced Procedures Status Page is a new section of the Web graphical user Interface, offering at a glance a graphically representation of the Sensor Network health. Administrators can easily figure out common issues related with sensor data acquisition and transmission errors. The istSOS Alert & Web Notification Service are the result of the Google Summer of Code 2014 outputs. This service is a REST implementation that take inspiration from the OGC Web Notification Service (OGC, 2003; OGC, 2006a) and the Sensor Alert Service (OGC, 2006b) which currently are OpenGIS Best Practices. Alerts are triggered by customized conditions on sensor observations and can be dispatched through emails or social networks. This year istSOS is entering into the OSGeo incubation process, this new challenge will permit to enhance the software quality and consolidate the project management procedures. The presenters will present the incubation status and discuss about the next steps.

uk: вхід без авторизації

name: istSOS: latest developments and first steps into the OSGeo incubation process


OpenLayers 3 Feature Frenzy

uk: Комп'ютерні науки

description: OpenLayers 3 aims to be a full-featured, flexible, and high-performance mapping library leveraging the latest web technologies. Since the initial release of 3.0 at the end of 2013, the library has matured significantly, and great new features are rolling out with each monthly release. This talk will provide you with a tour of the latest features in the library, including daring live demonstrations. We will present our recent and ongoing work on making the library more user-friendly and introduce you to our new online build tool that makes it easy to create custom builds of the library. Whether you're a developer or decision maker, come to this talk to learn about the current status of OpenLayers 3, and see what's in store for the future.

uk: вхід без авторизації


GeoNetwork 3

uk: Комп'ютерні науки

description: The presentation will provide an insight of the new functionalities available in the latest release of the software. Publishing and managing spatial metadata using GeoNetwork opensource has become mainstream in many Spatial Data Infrastructures. GeoNetwork opensource 3.0 comes with a new, clean user interface based on AngularJS, Bootstrap and D3. Other topics presented are related to performance, scalability, usability, workflow, metadata profile plugins and catalogue services compliance. Examples of implementations of the software will also be given, highlighting several national European SDI portals as well as work for Environment Canada and the collaboration with the OpenGeoPortal project.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: pgRouting extends the PostGIS / PostgreSQL geospatial database to provide shortest path search and other network analysis functionality. This presentation will show the inside and current state of the pgRouting development, from its wide range of shortest path search algorithms to driving distance calculation or Traveling Sales Person (TSP) optimization. Additionally we will give a brief outlook and introduction of upcoming new features like the Vehicle Routing Problem (VRP) solver, and what we have in mind for future releases. We will explain the shortest path search in real road networks and how the data structure is important to get better routing results. Furthermore we will show how you can improve the quality of the search with dynamic costs and make the result look closer to the reality. You will also learn about difficulties and limitations of the library, and when pgRouting might not be not the right tool to solve your routing problem.

uk: вхід без авторизації

name: Route Planning in your Database with pgRouting


MapServer #ProTips 2

uk: Комп'ютерні науки

description: MapServer is a fast, flexible and extremely powerful tool for creating dynamic maps for the Web. Underneath the hood, MapServer offers many powerful and advanced features that many users never dig into, and new features are being added constantly. Come learn about some of the more advanced features of MapServer, from extending OGC services to exporting data to GDAL file formats to very complex symbology and labeling. Learn simple and advanced use cases and debugging techniques for some of these advanced features from two presenters with over 30 years combined experience of using MapServer; this will be the second #protips performance by these two vibrant characters. A live MapServer instance will be used during this presentation (yes we are still crazy!).

uk: вхід без авторизації


uk: Комп'ютерні науки

description: CartoDB is an open souce tool and SaaS platform that allows users to make beautiful maps quickly and easily from their own data. To complement our users needs, we launched last year our free-to-use open source OSM based basemaps Positron and Dark Matter (https://github.com/CartoDB/CartoDB-basemaps), designed in collaboration with Stamen to complement data visualization. While architecturing them, we had several compromises in mind: they had to be powered by our existing infrastructure (powered by Mapnik and PostGIS at its core), they had to be scalable, cacheable but frequently updated, customizable, match with data overlays, and, last but not least, they had to be beautiful. This talk is the tale of the development process and tools we used, how we implemented and deployed them and the technology challenges that arose during the process of adapting a dynamic mapping infrastructure as CartoDB to the data scale of OSM, including styling, caching, and scalability, and how (we think) we achieved most of those. I will also talk about the future improvements that we are exploring about mixing the combination of basemap rendering with data from other sources, and how you can replicate and tweak those maps on your own infrastructure.

uk: вхід без авторизації

name: CartoDB Basemaps: a tale of data, tiles, and dark matter sandwiches


uk: Комп'ютерні науки

description: This presentation will showcase the use of Oskari (http://oskari.org/oskari) in publishing embedded map applications. The typical use case doesn't require any programming skills. You only need to select the map layers and tools that will be available in the application. After that, you can customize the user interface (size, colors, tool layout etc.). As a result the publishing tool will give you a HTML-snippet to embed to any web site. The supported web services are WMS, WMTS, WFS and Esri REST. If your data is not readily available through a web service, you can import data. Shapefiles, KML, GPX and MID/MIF-files are supported. There's an extensive selection of tools at your disposal: index map, centering to user��s location, address and place name search, attribute table (for vector data) to name a few. Integrating the map application with the surrounding web page makes more advanced use cases possible. All you need is a few lines of JavaScript to use the RPC interface (http://www.oskari.org/documentation/bundles/framework/rpc). With RPCs you can control the map application from the parent document and vice-versa. They can also exchange information. This enables you to develop highly interactive web applications with always up-to-date data. In the presentation an example application made using Oskari and D3 will be showcased.

uk: вхід без авторизації

name: Map publishing with or without programming skills


uk: Комп'ютерні науки

uk: вхід без авторизації

name: Fast Cache, Fresh data. Can we have it all?


uk: Комп'ютерні науки

uk: вхід без авторизації

name: Tempus, a new OpenSource platform for Multimodal routing


uk: Комп'ютерні науки

description: Recently, many services regarding moving object have been studied with using location information as mobile devices and systems are advancing. Trajectory is the data which information of the location by the time. The current database system is not defined that to store of the moving object data type. Therefore, the location information of object can be stored, but it is difficult to store those location information and time information together. In this paper, the extended system which can store the trajectory of the moving object by using PostgreSQL and PostGIS used as spatial database is designed and implemented.

uk: вхід без авторизації

name: PostTrajectory : Querying and Managing GPS and Trajectories on Postgresql/PostGIS


uk: Комп'ютерні науки

description: Local government fire departments always face scrutiny of their performance and efficiency. They are continuously asked to do a better job with fewer resources. In this highly technical session we will show how PostGIS is being used to analyze and measure performance throughout the city and plan for future resource requirements. Every city we work with is unique in some way. Some fire departments act as the local ambulance service while other cities contract with private ambulance companies. Emergency “911” response centers are often managed by police/law enforcement departments but not always! Many cities also have “mutual aid” agreements with neighboring cities to assist them when needed. For our customers PostGIS stores and manages the geo-located events (fires, hazardous spills, etc.) and provides details about the departments and individual emergency vehicle performance. It is most interestingly used to create statistical reports about things such as “Effecive Response Force” and “Resource Drawdown”, which are used to measure the efficiency and effectiveness of the department. Please come to learn how PostGIS is used to analyze things such as primary response areas and fire hazard severity zones, allowing our customers to ask more advanced, geographically based questions.

uk: вхід без авторизації

name: Analyzing Fire Department Response with PostGIS


uk: Комп'ютерні науки

description: After the nuclear power plant accident in Fukushima, signif- icant amount of radioactive materials released into the environment. The radiation exposure has brought lots of concerns about environmental con- tamination, economic, and social consequences. The Japan governmental agencies have started to continuously monitor and collect radiation levels by monitoring posts, car and airborne surveys for the estimation of dose levels of radioactive materials and analysis of human effects in the future. In this paper, we propose a new platform, called RALFIE (radiation exposure lifelog Indicator), to map a personal spatio-temporal positions in daily life into air dose rates on the real-time radiation monitoring data and estimate potential radiation exposure based on their lifelogs such as GPS logs and sensor monitoring logs. The RALFIE is based on AIST sensor information platform based on OGC standards such as SOS, CWS, WCS, etc. In addition, it cooperates with D-shuttle sensor and assesses the relationship between ambient dose equivalent and individuals. In this presentation, we introduce an overview of AIST sensor information platforms and RALFIE platform and show a use case of the integration of environmental sensing data and personal data for providing potential radiation exposure information to mobile users. Also, we will take account into other health standards such as SDMX-HD and HL-7 for supporting public health problems and discuss about how to combine them with/into OGC standards.

uk: вхід без авторизації

name: External Radiation Exposure Estimation by OGC-based Sensor Information Platforms


uk: Комп'ютерні науки

description: pgRouting extends the PostGIS / PostgreSQL geospatial database to provide shortest path search and other network analysis functionality such as alternative K-Shortest path selection. But, in some case, client side draggable route selection (like Google Maps Direction or OSRM) is preferable. This presentation will research what is necessary to realize such client side draggle route selection with pgRouting, then try to implement the functionality to some browser(Leaflet, OpenLayers .etc) and desktop(QGIS .etc) client.

uk: вхід без авторизації

name: Research client side draggable route selection with pgRouting


uk: Комп'ютерні науки

description: The open source database SQLite/SpatiaLite has been widely used for presenting geospatial data in geographic information systems (GISs), especially those run on mobile devices. A SpatiaLite database defines tables with geometry column for layers, and spatial indices for speeding up spatial queries. However, one of the issues remained to be resolved is how to define a framework symbolizing the portable SpatiaLite data efficiently. For this reason, we developed an open data schema “WalkLite” by inheriting the Walk spatial data specification (the data specification is currently used in surveying and land use planning in China). WalkLite schema provides an extension to SpatiaLite in the following aspects: 1. Four meta-data tables complying with the Walk spatial data specification: WalkLayers, SymbolFactory, MetaData, and MetaDataDef. 2. Corresponding the Walk spatial database, each WalkLite layer contains three tables: two SpatiaLite layer tables (one for features, the other for annotations) and one symbol table. 3. The feature layer table contains OGC SRS geometry and style ID. 4. The annotation layer table contains OGC SRS geometry (a point for the location of annotation, or a polygon for the location of image), annotation (text that stores the content of annotation or the file path of image) and style ID. 5. The symbol table defines styles indexed with style IDs referred by the feature layer table and annotation layer table. WalkLite schema was typically implemented on a SpatiaLite database, though it can also be adapted to other geospatial data formats supported by GDAL/OGR library. In this sense, the spatial data following the schema can be shared with other GIS software and used on cross-platform applications. In this presentation, we will introduce the Walk Schema and demonstrate a WalkLite-based mobile GIS App that is widely used for land investigation, cadastral inventory and decision analysis in a number of Chinese provinces.

uk: вхід без авторизації

name: WalkLite in Mobile GIS: A Schema to Extend and Symbolize SpatiaLite


uk: Комп'ютерні науки

description: “How do you make money selling software that is free?“ A valid question and one that is asked even from people who are in the open source community. The point of open source is to share and collaborate so how can you make sure your efforts benefit the greater open source community while still growing your business? There are several different models that businesses can leverage to profit from open source software including offering expertise as a supporter of popular open source projects to creating your own open source project to fit your business needs. This presentation will focus on how we created Bootleaf-OGC, an open source project, out of Bootleaf which in turn was based on two other open source projects (Bootstrap and Leaflet). We will discuss our decision making process for choosing the Bootleaf project to replace the current interface on our mapFeeder product, where the project is located on git-hub so attendees can download it, and our decision on what enhancements to give back to the project. We will also discuss our roadmap for moving forward with this project and other business decisions we are making around open source software. Attendees will come away from this presentation with information about open source business models, entrepreneurship, and knowledge of a new open source mapping application project they can utilize and contribute to.

uk: вхід без авторизації

name: Giving Away the Code Without Giving Away the Farm: A Business Model for Open Source Entrepreneurs


uk: Комп'ютерні науки

uk: вхід без авторизації

name: Location-based Task Management for Mobile Business


uk: Комп'ютерні науки

description: Many people will cite how their adoption of software was based on the quality of documentation, and yet documentation can be one of the largest gaps in quality with an open source project. This talk will discuss why that is, what you (yes you) can do about it, and how the author has so far managed to avoid burnout by learning to accept less-than-perfect grammar.

uk: вхід без авторизації

name: Everybody wants (someone else to do) it: Writing documentation for open source software

name: Open Source Geospatial Foundation (OSGeo)


uk: Комп'ютерні науки

description: Whilst opensource software allows for the transparent collection of crowdsourced geographic information, in order for this material to be of value it is crucial that it be trusted. A semantic assessment of a feature’s attributes against ontologies representative of features likely to reside in this location provides an indication of how likely it is that the information submitted actually represents what is on the ground. This trust rating can then be incorporated into provenance information to provide users of the dataset an indication of each feature’s likely accuracy. Further to this, querying of provenance information can identify the features with the highest/lowest trust rating at a point in time. This presentation uses crowdsourced data detailing the location of fruit trees as a case study to demonstrate these concepts. Submissions of such crowdsourced information – by way of, say, an OpenLayers frontend – allow for the collection of both coordinate and attribute data. The location data indicates the relevant ontologies – able to be developed in Protégé – that describe the fruit trees likely to be encountered. If the fruit name associate with a submitted feature is not found in this area (e.g. a coconut tree in Alaska) then, by way of this model, the feature is determined to be inaccurate and given a low trust rating. Note that the model does not deem the information wrong or erase it, simply unlikely to be correct and deemed to be of questionable trust. The process continues by comparing submitted attribute data with the information describing the type of fruit tree – such as height – that is contained in the relevant ontologies. After this assessment of how well the submitted feature “fits” with its location the assigned trust rating is added to the feature’s provenance information via a semantic provenance model (akin to the W3C’s OPM). Use of such semantic web technologies then allows for querying to identify lower quality (less trustworthy) features and the reasons for their uncertainty (whether it be an issue with collection – such as not enough attribute data being recorded; time since collection – given degradation of data quality over time, i.e. older features are likely less accurate than newer ones; or because of a major event that could physically alter/remove the actual element, like a storm or earthquake). The tendency for crowdsourced datasets to be continually updated and amended means they are effectively dynamic when compared to more traditional datasets that are generally fixed to a set period/point in time. This requires them to be easily updated; however, it is important that efforts are directed at identifying and strengthening the features which represent the weakest links in the dataset. This is achievable through the use of opensource software and methods detailed in this presentation.

uk: вхід без авторизації

name: Semantic assessment and monitoring of crowdsourced geographic information


uk: Комп'ютерні науки

description: COBWEB is a European Union FP7 funded citizen science project that has produced a platform through which citizens living within Biosphere Reserves will be able to collect environmental data using mobile devices. Part of the infrastructure are a COBWEB mobile app, the survey designer and the Personal Cloud API (PCAPI) middleware. The survey designer is a GUI editor for generating custom forms, which can be downloaded onto the app, together with a map interface for viewing data captured in the field and a mechanism for exporting user data to CSV, KML and GeoJSON. The COBWEB app has been generated on the foundations of Fieldtrip Open, which is a modular plug-in framework to enable developers to write their own extensions and re-use plugins written by others. This framework has been used in the creation of other production strength apps e.g. the FieldtripGB, FieldtripOSM. The framework is based on Cordova framework and can be compiled to Android and iOS and potentially all other platforms targeted by Cordova. Plugins have already been written for capturing GPS tracks, geocoding, caching off-line maps, creating Geo-Fences, overlaying layers in MBTiles and KML Format, extending the records with sensor data, making decision tree questionnaires and syncing data on the cloud. The synching functionality is the one that allows user to download their custom forms to their devices and layers and upload their captured data to their personal cloud space. Finally, PCAPI is a middle-ware which abstracts storage to cloud providers e.g. Dropbox or a local File system. All the software is (modified) BSD-licensed.

uk: вхід без авторизації

name: COBWEB, a citizen science data collection platform.


uk: Комп'ютерні науки

description: Many FOSS projects have started as endeavours to solve a problem at hand. In due course, the developed software has been adopted by some other users, has proven itself useful and then, by magic, has become a popular product with thousands of users worldwide. Fact or fiction? This presentation outlines the success story of Oskari and national co-operation around the software. Oskari http://www.oskari.org is a popular open source platform for browsing, sharing and analyzing of geographic information, utilizing in particular distributed spatial data infrastructures. The Finnish Oskari collaboration network actively works on various projects extending the software and creating new innovative services. The network consists of 27 member organizations, of which 12 are private companies. Success doesn't usually come without organized work. For the process of securing a successful co-operation, a few steps can be laid out. 1) Creating a useful piece of software with appropriate licensing 2) Co-operating with a number of early adopters 3) Starting a collaboration network 4) Adopting a sustainable model for collaboration and developing a product lifecycle management plan 5) Measuring success and providing proof of benefits of both the software and co-operation

uk: вхід без авторизації

name: How to build a succesful co-operation around your FOSS software - case Oskari


uk: Комп'ютерні науки

description: Rendering 3D point clouds on mobile devices is a hard task because we are working online and we work on limited performance devices.We have developed a server-client library that allow developers to serve any size point clouds on any environment.The library developed has the following products: - A tool to import the point clouds from different formats, - A library to pre-process fastly this points and a server to give the correct points on every tile to the clients apps.This server streams the data. A demo example http://point-cloud.glob3mobile.com/

uk: вхід без авторизації

name: Processing, serving and rendering huge point clouds on Mobile devices and Web pages


uk: Комп'ютерні науки

description: Everyone knows you can query a bounding box or even spatially join tables in PostGIS, but what about more advanced magic? This short symphony of PostGIS examples will look at using advanced features of PostGIS and PostgreSQL to accomplish surprising results: * Using full text search to build a spatially interactive web form. * Using raster functionality to look into the future. * Using standard PostgreSQL features to track and visualize versioning in data. PostGIS is a powerful tool on it's own, but combined with the features of PostgreSQL, it is almost magical.

uk: вхід без авторизації

name: Magical PostGIS in three brief movements


uk: Комп'ютерні науки

description: A plethora of map-based citizen science sensor platforms for different use-cases already exist. They provide cheap, preconfigured, plug and playable hardware and software solutions. Using data from multiple platforms and resources can be a challenging task in respect of discovering, exploring, downloading and converting. In this paper we present a one-stop-shop for sensor data that tries to tackle these problems. Therefore a basic data schema capable of metadata is established that allows publishing generic sensor platforms and sensor data. For exploration the OpenSenseMap, a web platform is implemented based on common web standards. Citizen science is often called “public participation in scientific research” [1] and describes the engagement by non-professional scientists in collecting and analyzing data, decision making, developing technology and publication of these on a voluntary basis. The idea of involving citizen in scientific projects is not new. Two examples are the Christmas Bird Count [2] and the Galaxy Zoo project, which identifies and classifies galaxies on sky images taken at the Sloan Digital Sky Survey. An always discussed concern about citizen science is data quality [3]. Due to limited knowledge of the volunteers and missing or questionable metadata, scientists often characterise data collected by citizens as valueless. In the beginning citizen science was connected with activities where humans were used as sensors [4]. Nevertheless, the scientific community is becoming more and more interested in citizen science today and citizen science projects are part of complex research projects [5]; e.g. ambient environment monitoring. We think two reasons boosted this trend. First, citizens are getting more interested in their environment and its effects on daily life. Also many popular citizen science projects are related to ambient environment monitoring and topics around smart cities; e.g. the AirQualityEgg project and the SmartCitizen project. Second, the vast development of technology makes it easy and affordable to build the necessary tools for a citizen science project. Microcontroller platforms like Arduino or tessel.io and the quality and price of sensors make it nowadays easy to build sensor platforms, which are easy to use and affordable in price. By using open-source hardware and software, it is easier - especially for traditional non-technical research communities- to create custom sensor platforms. Furthermore, the web makes it easier to share and discuss geospatial data at global scale. This work describes the requirements, design and implementation of the OpenSenseMap. OpenSenseMap is following the clientserver model [6] and its complete application stack is implemented in JavaScript. It describes the basic components and the underlying data model. All components are using open-source technology and are published under an open-source license too. The RESTful service is the heart of OpenSenseMap and implements the data publish and data retrieval functions. Developers may use it to build custom applications around OpenSenseMap or integrate OpenSenseMap into existing projects. The NodeJS application runs its own web server and implements the different HTTP request types. The OpenSenseMap concept is being evaluated with an technical and a user survey.

uk: вхід без авторизації

name: OpenSenseMap - a Citizen Science Platform For Publishing and Exploring Sensor Data as Open Data


Image Geocoding as a Service

uk: Комп'ютерні науки

description: Driven by the ambition of a global geocoding solution, in this paper we present the architecture of an image geocoding service. It takes advantage of the ubiquity of cameras, that are present in almost all smartphones. It is an inexpensive sensor yet powerful, that can be used to provide precise location and orientation. This geocoding service provides an API similar to existing ones for place names and addresses, like Google Geocoding API. Instead of a text based query, images can be submitted to estimate the location and orientation of the user. Developers can use this new API, keeping almost all the existing code already used for other geocoding APIs. Behind the scenes, image features are extracted from the submitted photograph, and compared against a huge database of georeferenced models. These models were constructed using structure from motion (SFM) techniques, and heavily reduced to a representative set of all information using Synthetic Views. Our preliminary results shows that the pose estimation of the majority of the images submitted to our geocoding was successfully computed (more than 60%) with the mean positional error around 2 meters. With this service, an inexpensive outdoor/indoor location service can be provided, for example, for urban environments, where GPS fails.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: ZOO-Project is an Open Source Implementation of the OGC Web Processing Service (WPS) available under a MIT/X-11 style license and currently in incubation at OSGeo. ZOO-Project provides a WPS compliant developer-friendly framework to easily create and chain WPS Web services.This talk give a brief overview of the platform and summarize new capabilities and enhancement available in the 1.5.0 release. A brief introduction to WPS and a summary of the Open Source project history with its direct link with FOSS4G will be presented. An overview of the ZOO-Project will then serve to introduce new functionalities and concepts available in the 1.5.0 release and highlight their interests for applications developers and users. Evolutions and enhancements of the ZOO-Project WPS server (ZOO-Kernel) will first be detailed especially regarding compliancy (WPS 1.0.0 and 2.0), performance and scalability. The ZOO-Project optional support for Orfeo Toolbox and SAGA GIS will then be introduced, with details on the numerous new WPS Services (ZOO-Services) they provide. Use and connexion with other reliable open source libraries such as GDAL, GEOS, MapServer, GRASS GIS, CGAL will also be reviewed. Examples of concrete applications will finally be shown in order to illustrate how ZOO-Project components (ZOO-Kernel, ZOO-Services, ZOO-API and ZOO-Client) can be used together as a platform to build standard compliant advanced geospatial applications. Along with the new 1.5 release, this talk will also present how ZOO-Project is being developed, extended and maintained in the context of the EU funded PublicaMundi research project.

uk: вхід без авторизації

name: ZOO-Project 1.5.0: News about the Open WPS Platform


uk: Комп'ютерні науки

description: OpenLayers 3 is a powerful mapping library that can be used to create interactive mapping applications. Although it has a simple, intuitive and well-documented API, it requires knowledge of JavaScript to use, and no tools exist to leverage its functionality for more general GIS users. This presentation introduces an open-source QGIS plugin that creates web applications based on OL3, without the need of writing code manually. Elements of the web app are defined using a simple GUI, and QGIS GUI elements are used as well to define its characteristics (for instance, for defining the styling of layers or the extent of the view). The plugin can create different types of web apps, from simple maps used to browse data layers, to rich ones with GIS-like functionality, as well as others such as narrative maps. Apart from being an interface for writing OL3 code in a graphical way, it automates data deployment, and can import data into a PostGIS database or upload layers to a GeoServer instance. Altogether, these capabilities, along with QGIS data management functionality, allow to create a web app from QGIS in a very short time, as well as modifying or improving it later.

uk: вхід без авторизації

name: Building OpenLayers Applications with QGIS


Intelligent SDIs with MapMint 2.0

uk: Комп'ютерні науки

description: This conference aims at presenting the status of the MapMint open source project and its upcoming 2.0 version. The upgrade to newer versions of its core open source components will first be explained. The extensive use of OGC standards through ZOO-Project 1.5, GDAL 1.11 and MapServer 7 is indeed making MapMint an even more stable and efficient foundation to build an open source and standard-compliant spatial data infrastructure. The new metadata related functionalities being developed in interaction with PyCSW and CKAN will also be presented along with the assets of the CSW standard support. The new MapMint responsive user interfaces based on OpenLayers 3 and Bootstrap will also be presented. Both code and documentation improvements will also be detailed. The newly added functionalities in MapMint 2.0 will finally be explained from the developer and user point of views, based on case studies and live examples.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: GeoPackage is a new encoding standard created by the Open Geospatial Consortium as a modern alternative to formats like SDTS and Shapefile. Using SQLite, the single-file relational database can hold raster imagery, vector features and metadata. GeoPackage is an ideal data container for mobile devices such as smartphones, IoT devices, wearables, and even automobiles. We have created a few open-source tools to manipulate this exciting technology in a way that is useful to the geospatial community. Our goal with the GeoPackage specification implementations is simple: Create GeoPackages quickly and reliably while maintaining standard conformance. The single biggest issue we have faced is the speed in which large amounts of imagery can be disseminated to the end user. Data standards reliability was also a concern because we found many vendors interpreted the specification differently or to suite their own needs. Finally, the main problem GeoPackage was created was to solve was interoperability. We set out to create an implementation that would guide other parties towards making a data product that would function as well on one platform as it would on a completely different platform. Our initial implementation of the GeoPackage specification was created using Python 2.7.x. The software design was intended for command line use only in a script-friendly environment where tiling speed was paramount. The Gdal2tiles.py script was improved upon by harnessing the Python multiprocessing library so that multiple tile jobs could run simultaneously. The other piece of the workflow, creating GeoPackages, would be a separate development effort from scratch called tiles2gpkg_parallel.py. In tiles2gpkg_parallel.py, we implemented multiprocessing by writing to separate SQLite databases in parallel and then merging the tiled data sets into one compact database. This implementation worked well and increased the performance of producing these data sets; however, the command line design means that all but the most technically adept users would struggle to use the tools. With the initial Python implementation getting early-adopters a preview of GeoPackage in the short term, our team set out to make a production-quality GeoPackage API that could satisfy all user needs. Named Software to Aggregate Geospatial Data or SWAGD, we created a robust library for tiling raster data, packaging raster data stores into GeoPackages, and viewing either the raw tiles OR the finished GeoPackage products within a map viewer. Additionally, a Geopackage verification tool was created to foster community adoption. For more information, see our Github site here: https://github.com/GitHubRGI/swagd. Many open-source tools are being leveraged on the SWAGD project, including many common build and continuous integration tools including Github, TravisCI, WaffleIO, and Coverity. Using proven software development mechanisms like unit testing and code reviews we now have a consistent, reproducible, and inclusive GeoPackage implementation. We have an aggressive list of future capability that we would like to develop including ad-hoc routing on a mobile device, vector tile data sets, and even 3D support.

uk: вхід без авторизації

name: OGC GeoPackage in practice: Implementing a new OGC specification with open-source tools


The OpenStreetMap Revolution

uk: Комп'ютерні науки

description: OpenStreetMap is at the center of a data and software revolution that has completely changed what we expect from maps and how we interact with them. The project has defined open map collaboration, it is a cradle of open software innovation, is used by businesses and governments, enables startups against industry giants and has opened the power of GIS to the underprivileged and poor. OpenStreetMap is only one of very few commercially viable global geospatial datasets. Ten years into the project, it is clear that OpenStreetMap is not an impossible quest nor a fluke of history, but it is here to stay and grow. An amazing and growing community, this year, OpenStreetMap crossed the two million users mark. Every month, 30,000 users log into the map and improve it. And OpenStreetMap stands to attract even more attention: Data of large proprietary vendors continues to be effectively not available to a huge part of the market due to rigid licensing; rumors around Nokia's HERE changing owners are at an all time high. This talk sweeps through OpenStreetMap's history and gives a detailed look at the state of the project in statistics and visualizations, including recent map developments in Asia. It reviews OpenStreetMap's strengths and weaknesses and makes predictions for the future of OpenStreetMap. We'll finish up with opportunities and needs for the project to grow as an open data community and a suite of open source software tools.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: So you have an open source project or you want to create a new one. Maybe you have worked on a development project in the past that didn’t have quite the amount of rigor you would have liked. You know you want a build system for your project that is easy to administer, cheap, and powerful, but where do you start? Here is how we implemented our own process using free open source tools. We learned from experience that developers are more focused on solving problems than perceived “housekeeping” tasks. We needed tools that would automate the mundane, repeatable, mechanical, or human-difficult tasks so that developers could focus on what they are good at. We needed a single-sign on through Github to lower any barriers to tool usage that might exist. We needed a dead-simple way to determine if our commits broke functionality anywhere else in code. We needed to track how much of our code was covered by unit tests. Finally, we needed to be able to quickly and easily review each-other’s code and provide feedback. We decided on TravisCI to handle build duties in Maven with a nested project structure and also for its integration with Coveralls. For bug tracking, release scheduling, and task management, we chose WaffleIO for its tight integration with Github issues. One additional feature we desired was static analysis so that simple errors that lie outside of a linter could be caught and reported. This was handled by a combination of Coverity scans and a static analysis tool for Eclipse called Findbugs. Due to our platform support and third-party library (GDAL) requirement, the Github Wiki was the perfect place to keep all setup documents and other helpful articles for end-users and project new-comers. This system for software development worked quite well in most cases. Builds were automated, moderately tested (~40-60% coverage), and complaining to the team loudly via email when things broke. We had a new problem though: build breakages in the master branch and the inability to share code that was not yet fully functional. To alleviate this, we started using the branching and merging functionality that makes Git so valuable. Now, no direct commits occur to the master branch unless in very special circumstances. A developer will see the TravisCI build results before the merge ever occurs, allowing them to adjust code or test cases *before* they cause failures. As a side effect, the merge request workflow allows the team to perform code reviews quickly and easily. Finally, any CI system is not without challenges. Building a continuous integration system has upfront costs that should not be ignored. The payoff from those costs, however, is code/product quality and the avoidance of technical debt. Lastly, some of these CI tools lack support for private repositories.

uk: вхід без авторизації

name: Building and integrating a Continuous-Integration system within your open source project


uk: Комп'ютерні науки

description: More organisations are moving to use FOSS4G software to cover shrinking budgets. It is very appealing to an organization’s leaders to ditch their current proprietary software solution with the attendant saving on per user licences and ongoing maintenance costs. Obviously, if you switched to FOSS4G to get better features and scalability you should consider buying a support contract from one of the many vendors that offer them, these companies support many of the core developers directly. This way you get all the advantages of open source, prompt support and often the chance to ask for new features. However, if you (or your boss) are looking to save money then you are moving from a cash economy to a gift economy. In a gift culture you need to build up your “capital” before attempting to take too much out. For example, you’ve downloaded the software and installed it, and all looks good. Then disaster hits, you have a demo for the CIO and nothing's working; Time to hit the user list, the developer list, stack exchange. Why can’t you get an answer? Remember just because your issue is urgent to you the developers might be in the middle of a new release or adding a new feature and have more important (or fun) things to do with their time. They will notice they have never seen your name before on the list, or on Stack Exchange that you have a reputation in the single digits – thus you are a newbie. There’s no harm in that but wouldn’t it be better to have got that out of the way before your emergency. You could have built up your reputation by asking some questions earlier especially questions like “what can I do to help?” or “I found an unclear paragraph in the install instructions, how do I fix it for you?” on a mailing list. On StackExchange you can build reputation by asking good questions and by answering other people’s questions. Once you’ve banked some capital there are still good and bad ways of asking a question. Developers are busy people (the GeoTools users list has 20-30 messages a day for example) no one has time to read all of them closely. If you use a poor subject (e.g. "Help!!!!") or don’t provide a clear description of the problem (e.g. “it crashes”) then the odds of being ignored are huge. It can be tempting once you have found a helpful developer to keep emailing them directly, but this is likely to lead a polite(ish) reminder to keep to the list so that everyone can benefit or silence. This talk will show how to be a better open source citizen and get a better answer than RTFM when your project is stuck and the demo is the next day. The author will share his experience with helping users and developers on the GeoTools and GeoServer mailing lists and as a moderator on gis.stackexchange.com.

uk: вхід без авторизації

name: Earning Your Support Instead of Buying it: A How-to Guide to Open Source Assistance


uk: Комп'ютерні науки

description: This presentation shows how to better integrate simulation codes and Geographical Information Systems, and takes the example of Hydrological modelling integration into QGIS. Scientific modelling and simulations are present in a large number of areas. A significant proportion of simulation codes are applied spatially, at different levels, from a neighborhood scale up to worldwide areas. These simulation codes take spatial information as input data, and output results which are related to space too. But most of the time, they do not directly handle GIS data. Data types and data formats are different, and there is therefore a lot of effort to put into pre-processing and post-processing of the data to get it from GIS to the simulation codes and back. For example, determining the diffusion of a pollutant leak into underground water necessitates to get a DEM, location of the leak, geological data and more from the GIS, and transform it to simulation code input format. Then launch a simulation (on finite volumes e.g.), and convert the output into GIS files so that to be able to visualize spatial repartition of the pollutant according to time. The topic of this presentation is therefore to show how to better interact between simulation and GIS. We present the prevalent types of data for simulation, how they differ from GIS, and how we usually transfer from one type to another. Then we show how we worked towards better integration. Polygonal meshes are the most common way of representing 2D geometries for simulation purposes. Integrating simulation to a GIS requires storing georeferenced meshes in a databases (or using standard GIS file formats), and being able to use simulation values interpolated over the elements as a map layer. We show how to modify simulation codes to read directly a mesh from a GIS and write the results into a GIS. We implemented a new type of layer for QGIS, a mesh layer, which enables to display simulation results with high performances. This takes into account the temporal dimension. We also demonstrate how to integrate a simulation code into QGIS Processing so that it can be managed directly from within the desktop application. We illustrate these concepts with a demonstration of a full integration of a Hydrological simulation tool inside QGIS, with simulation management, custom user interface and strong integration of data between the simulation code and GIS data. In this sense the FREEWAT project started mid-2015, which aims at integrating multiple Hydrological codes into QGIS is also a good example of simulation and GIS integration. We end up with the perspectives for more global integration of simulation tools and GIS, and the work still to be done to bridge the gap between those two worlds.

uk: вхід без авторизації

name: On simulation and GIS, coupling and hydrology


uk: Комп'ютерні науки

description: CartoDB is growing to be one of the biggest mapping platform for the masses, being powered by a fully open-source stack, with PostgreSQL, PostGIS, Mapnik and Leaflet at its core. Our aim is to democratize map and geographical data visualization, making it easy for non-GIS people to create simple maps using the CartoDB Editor, but still keeping all the power and flexibility of the underlying components available to advanced users, with a variety of building blocks ranging from the frontend with CartoDB.js and Torque to the backend with the Map, SQL and Import API, parts of what we call the CartoDB Platform. Serving dozens of millions of map tiles daily has its own set of problems, but when they are being created by hundreds of thousands of users (which have their own database and can alter everything from styling, to the data sources and the SQL queries applied) everything turns out to be a big source of challenges, both development and operationally speaking. This talk will go through our general architecture, some of the decisions we’ve had to take, the things we’ve learned and the problems we’ve had to tackle through the way of getting CartoDB to scale at our level of growth, and how we're giving back to the community what we've discovered though the process.

uk: вхід без авторизації

name: Taking dynamic web mapping to 1:100000 scale


uk: Комп'ютерні науки

description: Leaflet and OpenLayers are two well-known javascript libraries for embedding interactive maps in a web page, and each of them comes with pros and cons which are not obvious. Having worked with both libraries for indoor applications, we will in this presentation offer insight on which of them is more suited to a variety of situations and requirements, and which challenges they should overcome in the future.

uk: вхід без авторизації

name: Leaflet vs. OpenLayers: which is best for our indoor maps?


uk: Комп'ютерні науки

description: "Nudging" und das dahinter liegende Konzept des "liberalen Paternalismus" treffen nicht nur in der notorisch kritischen Netz-Community auf die erwartbaren Anti-Reflexe. Dabei könnte es – richtig verstanden und benutzt – ein sehr nützliches und brauchbares Paradigma für das Design sozialer Systeme abgeben.

@language: de

uk: вхід без авторизації

name: Nudge! Nudge! – Was Design von Verhaltenspsychologie lernen kann


uk: Комп'ютерні науки

description: Im Geschäftsumfeld erhält jeder 122 E-Mails am Tag. Nur ein Bruchteil davon ist wirklich wichtig. Über andere Kanäle - soziale Netze, Kurznachrichten, Instant Messaging - kommen weitere Nachrichten hinzu. Die schiere Flut überwältigt. Um wirklich produktiv zu arbeiten, müssen wir umdenken. Lösungen, deren Design an den Wünschen der Anwender orientiert sind, die helfen, Nachrichten gewichten und Aufgaben zu erledigen, in Kombination mit Arbeitsweisen der sozialen Netze, sind der Weg, den Nachrichtenstress zu mindern.

uk: вхід без авторизації

name: E-Mail-Wahnsinn: Zeit für eine neue Art zu arbeiten #IBMDesign #NewWayToWork


uk: Комп'ютерні науки

description: Heiko Maas, Bundesjustizminister, twitterte noch im Dezember 2014, dass er einen neuen Anlauf zur Vorratsdatenspeicherung in Deutschland ablehne. Vor wenigen Wochen erschien dann aus seinem Ministerium ein neuer Entwurf. Doch steht seine Partei, die SPD, eigentlich hinter der Vorratsdatenspeicherung? Auf dem Parteikonvent im Juni kann die Entscheidung fallen, ob es eine VDS geben wird oder ob die Parteibasis rebelliert. Was getan werden kann, um die VDS endlich zu begraben.

uk: вхід без авторизації

name: VDS verhindern – Letzte Chance SPD-Parteikonvent?


Cryptocalypse now

uk: Комп'ютерні науки

description: Es ziehen dunkle Wolken über die Welt der sicheren und privaten Kommunikation im Internet, auch über NSA und Co. hinaus. Eine Lageeinschätzung.

uk: вхід без авторизації


Netzneutralität – Endspurt in Europa

uk: Комп'ютерні науки

description: In einem Paukenschlag hat die amerikanische Regulierungsbehörde FCC dieses Jahr einen starken Schutz der Netzneutralität in den USA beschlossen. In Kanada, den Niederlanden, Indien und Slovenien geraten Verletzungen der Netzneutralität zusehends unter Beschuss. In all diesen Fällen hat sich die Zivilgesellschaft gegen die Interessen der Industrie durchgesetzt. Vor diesem Hintergrund beginnt in Europa die finale Verhandlungsrunde über den EU-weiten Schutz der Netzneutralität und entgegen dem globalen Trend ist man in Europa versucht Netzneutralität endgültig abzuschaffen.

uk: вхід без авторизації


Living in the Electromagnetic Spectrum

uk: Комп'ютерні науки

description: Artist and writer James Bridle explores how politics is manifested in technology, and how the the things we build shape the world in unexpected ways. In particular, he will detail the ways in which networks and communications affect notions of citizenship in the 21st Century, as explored in his recent art works and writings.

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TINCON #butterbeidiefische

uk: Комп'ютерні науки

description: 2013 trugen Tanja Haeusler und Johnny Haeusler auf der re:publica unter dem Titel „The Kids are Alright“ eine Tirade über das Bildungssystem und den gesellschaftlichen Umgang mit digital aufwachsenden Jugendlichen vor. Ihr Vortrag endete mit der Forderung nach „Applaus für diese Jugend“. 2015 präsentierten sie ihr neues Projekt TINCON und damit ein Festival für digitale Jugendkultur, das vom 27. bis 29. Mai 2016 erstmalig in Berlin stattfinden wird.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Europa hat offenbar ein Problem. Comedien und Youtube-Star Idil Baydar und die Bloggerin, Juristin und Moscheeführerin Betül Ulusoy sprechen es an. Häufig humorvoll, immer direkt. Dabei machen sie künstliche Trennungen in "wir" und "ihr" sichtbar und konfrontieren ihre Zuschauer und Leser damit.

uk: вхід без авторизації

name: Europa, wir müssen reden! Mit Comedy und Alltagsgeschichten gegen Ausgrenzung


uk: Комп'ютерні науки

description: Lügenpresse, Misstrauen, Parallelwelten wie Pegida: Was hat das Internet damit zu tun? Und vor allem: Wie machen wir es besser?

uk: вхід без авторизації

name: Die kaputte politische Debatte: Wie das Internet Teil des Problems und Teil der Lösung ist


Hack your City

uk: Комп'ютерні науки

description: Die Stadt der Zukunft gehört den Bürgerinnen und Bürgern. Die digitalen Werkzeuge, die Maker Bewegung und Citizen Science führt dazu, dass immer mehr Menschen die Möglichkeit bekommen die Stadt selber zu gestalten.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: @NeinQuarterly, the "Compendium of Utopian Negation" that I began on Twitter a few years ago, began as a joke. And, I hope, has remained one. Yet my experience producing this odd little daily feed of playfully nihilistic jokes and aphorisms has also taught me a great deal that I've often found myself struggling to think through.

uk: вхід без авторизації

name: Losing Hope. Finding Europe. – Utopian Negation Reconsidered


uk: Комп'ютерні науки

description: Anonymous—a enigmatic protest ensemble that first emerged as an activist force in 2008—has been thrust repeatedly into the media limelight due to a series of high stakes digital protest attacks, stretching from Distributed of Denial Service attacks to high profile hacks. By 2011, Anonymous targeted Fortune 500 corporations and military defense contractors. Mercenary hackers doxed Anons, revealing their identities to law enforcement by publishing their legal names, personal photos, and addresses. Anons started to leak sensitive, classified, or humiliating information. Given the prevalence of cyberware and terrorism rhetoric, it would seem effortless and straightforward for government officials to paint Anonymous as a new breed of dangerous cyberterrorists. Despite a few notable attempts to forge this precise connection, the government has thus far failed in slotting Anonymous into this well worn scaremongering trope; the great majority of news media accounts treat Anonymous not as violent cyberterrorists, but foremost as insurgent digital activists.

uk: вхід без авторизації

name: How Anonymous (Narrowly) Evaded the Cyberterrorism Rhetorical Machine


uk: Комп'ютерні науки

description: Die fünfte Gewalt besteht aus den vernetzten Vielen des digitalen Zeitalters, die längst zur publizistischen Macht geworden sind. Sie verändern die Agenda des klassischen Journalismus, werden als Medienkritiker und Meinungskorrektiv aktiv, bilden Protestgemeinschaften, beeinflussen – über den Umweg der digitalen Öffentlichkeit – die Politik von Staaten und Unternehmen. Der Talk des Medienprofessors Bernhard Pörksen beschreibt mit vielen aktuellen Beispielen die Aktions- und Rollenmuster der fünften Gewalt im Überblick.

uk: вхід без авторизації

name: Die fünfte Gewalt. Die Macht der vernetzten Vielen


uk: Комп'ютерні науки

description: In dem Talk "Neue Journalismusformate für neue Zielgruppen" werden Juliane Leopold (BuzzFeed Deutschland) und Max Hoppenstedt (Vice/Motherboard) darüber sprechen wie sich der Journalismus in den letzten Jahren verändert hat und welche neuen Formate der Medienwandel hervor gebracht hat. Kurz: Wie sieht der Journalismus von morgen aus?

uk: вхід без авторизації


The art of trolling

uk: Комп'ютерні науки

description: This opuscle, or talk as we will call it forthwith for ease of understanding, is not compiled from any work extant, but is a plain and candid narration of matter of fact, founded on many years experience. By its assistance any one may become an expert troller in a short time, which is the principal object in the endavours of the speakers.

uk: вхід без авторизації


Hacktivism, or Fifty Shades of Grey Hat

uk: Комп'ютерні науки

description: The history and practice of hacktivism is a complicated business. Where did it come from, who's doing it, and why does it matter? Or is the whole discourse completely over-hyped? Join a discussion with some people who have thought about hacking and political engagement online. And come prepared to challenge what you hear.

uk: вхід без авторизації


Hollywoods Hacker

uk: Комп'ютерні науки

description: Wie Hacker im Kino gezeigt werden, wie wenig das mit der Wirklichkeit zu tun hat — und welche Filme zumindest etwas Mühe erkennen lassen: Eine Reise durch die Absurditäten der Filmgeschichte mit @hakantee und @oler.

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Serendipity: Not Mainstream since 2012

uk: Комп'ютерні науки

description: Dieser Talk stellt die Blog-Software Serendipity - oder kurz s9y - vor.

uk: вхід без авторизації

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


uk: Комп'ютерні науки

description: Was kann man lernen? Was kann man erwarten? Welche Erwartungen werden nicht erfüllt.

uk: вхід без авторизації

name: Lessons Learned ...: ... from running an open-source-project for more than a decade


uk: Комп'ютерні науки

description: Erfahrene Git-Nutzer nutzen hauptsächlich folgende Kommandos: git add, git commit, git checkout, git merge, git push und pull. Doch Git bietet noch viel mehr Funktionen die man beim alltäglichen Arbeiten nicht immer braucht. Trotzdem kann es sehr hilfreich sein diese Funktionen zu kennen, denn wenn man sie braucht, dann können sie wertvolle Zeit sparen. Darunter fallen Funktionen wie das Neu-Schreiben der kompletten Historie um etwa Binärdateien oder Passwörter zu entfernen, kaputte Branches und verloren gegangene Commits wieder herzustellen oder Spezial-Fälle beim Rebasen. Der Talk richtet sich an diejenigen, die Git schon kennen und neue nützliche Kenntnisse in der Nutzung gewinnen wollen.

uk: вхід без авторизації

name: Nicht alltägliche Git-Funktionen: Commiten, Pushen, Mergen kann jeder – aber was gibts darüber hinaus?


uk: Комп'ютерні науки

description: Ist Identity & Access Management mit Need-To-Know-Prinzip möglich? Ja! Dieser Vortrag stellt das freie Projekt Æ-DIR vor. Æ-DIR kombiniert feingranulierte Zugriffskontrolle für LDAP-fähige Systeme mit hohem Schutzbedarf mit konsequenter Delegation, selbst bei direktem LDAP-Zugriff.

uk: вхід без авторизації

name: Æ-DIR: Paranoid user management with OpenLDAP


uk: Комп'ютерні науки

description: Reaktive Programmierung gewinnt ständig an Bedeutung in Zeiten von Mehrkernprozessoren. In Java 9 haben die wichtigsten Interfaces wie Publisher und Subscriber Einzug in die Concurrency Bilbiothek als Flow API gefunden. In diesem Vortrag erläutern wir die Idee hinter der reaktiven Programmierung und schauen uns die zwei bekanntesten Frameworks Spring Reactor und RxJava an, die die Flow API implementieren. Am Ende schließen wir den Vortrag mit der Demo der reaktiven Anwendung auf Basis von Spring 5 und Spring Boot 2 ab.

uk: вхід без авторизації

name: Reaktive Programmierung in Java - mehr als eine Erweiterung des Observable-Patterns


uk: Комп'ютерні науки

description: Inhaltsverschlüsslung von Daten kann selbst dann noch schützen, wenn die Datenbank das Unternehmen schon längst verlassen hat. Jens Neuhalfen stellt vor warum und wie eine effektive Inhaltsverschlüsselung von Daten implementiert werden kann.

uk: вхід без авторизації

name: Practical Content Encryption: Sleep Better with Content Encryption


uk: Комп'ютерні науки

description: Das Goldige wird allzu schnell mit Kindlichem, Niedlichem und Süßem identifiziert. Das ist aber falsch. Tatsächlich steckt im Goldigen eine starke Bewegungsfigur, von der die Netzkultur angetrieben wird – an die allerdings noch einmal erinnert werden muss, um ihre eigentliche Kraft zu entfalten.

uk: вхід без авторизації

name: Lasst uns goldig sein! Lebens- und produktionstechnische Hinweise zur Bewegungsfigur der kleinen und kleinsten Formen


description: Der Schwerpunkt der Vorlesung „Technische Fluidsysteme“ ist die null- bzw. eindimensionale Behandlung von Fluidsystemen. Dabei stehen kompressible und instationäre Rohr- und Innenströmung im Vordergrund (Reynoldssches Transporttheorem, effektive Nachgiebigkeit, Riemannsche Verträglichkeitsbedingungen, usw.). Die Vorlesung ist in die drei Hauptkapitel „Hydrodynamische Schmierung“, „Hydrostatische Getriebe“ und „Verdrängermaschinen“ gegliedert.

uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 27.10.2015: Axiome, Kontigleichung

Technische Universität Darmstadt

addressCountry: DE

addressLocality: Darmstadt

addressRegion: Hesse


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 03.11.2015


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 10.11.2015


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 24.11.2015


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 01.12.2015


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name: Technische Fluidsysteme - Vorlesung 02.02.2016: Ähnlichkeitsbeziehung bei Verdrängermaschinen und Turbomaschinen


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 08.12.2015: Hydrodynamische Getriebe (Fottingerwandler)


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 09.02.2016


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 19.01.2016: Hydrodynamische Getriebe


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorrechenübung 12.01.2016: Fottinger Getriebe


uk: вхід без авторизації

name: Technische Fluidsysteme - Vorlesung 26.01.2016


name: Institut für Sicherheitstechnik / Schiffssicherheit e. V.

uk: вхід без авторизації

name: ALBERO: Auffliegen Decke: Versuch 6 - Brand Batteriemodul nur mit Löschdecke, Typ B


uk: Комп'ютерні науки

description: Recording of the 5th Workshop on Online Recommender Systems and User Modeling, in conjunction with ACM RecSys 2021, September 23rd, Seattle, WA, USA 00:00 Opening 02:36 Keynote by Emilia Gómez - Scientific challenges, practical methodologies and policy perspectives for trustworthy artificial intelligence 46:57 Herodotos Herodotou - Extracting User Preferences and Personality from Text for Restaurant Recommendation 1:09:09 Joey Ahnn - Bundle Recommender from Recipes to Shopping Carts - Optimizing ingredients, kitchen gadgets and their quantities 1:32:26 Veronika Ivanova - Towards interaction-based user embeddings in sequential recommender models 1:48:26 Len Feremans - A neighbourhood-based location- and time-aware recommender system 2:13:12 Zhoran Liu, Leqi Zou, Youlong Chen - Monolith: Real Time Recommendation System With Collisionless Embedding Table 2:32:32 Jessica Maghakian - Interaction-Grounded Learning for Recommender Systems 2:49:44 Keynote by Eugene Yan - Online Recommender Systems: Is the juice worth the squeeze? 3:32:35 Kevin Regan - On the Factory Floor: ML Engineering for Industrial-Scale Ads Recommendation Models 4:03:13 Liying Zheng, Yuri Brovman - Page-Wise Personalized Recommendations in an Industrial e-Commerce Setting 4:24:12 Brainstorming introduction: Marina Ananyeva - Next-basket recommendation with flexible total cost

uk: вхід без авторизації

name: ORSUM 2022: 5th Workshop on Online Recommender Systems and User Modeling (ACM RecSys 2022)


de: Humanmedizin/Gesundheitswissenschaften

uk: Медицина / Науки про здоров'я

en: Human Medicine / Health Sciences

@language: uk

uk: вхід без авторизації

name: Introduction to Pharmacodynamics: Вступ до фармакодинаміки

name: Taras Shevchenko National University of Kyiv

name: Projekt 'Open Education Resources with Ukraine'


uk: Комп'ютерні науки

uk: вхід без авторизації

name: Einführung in Git(Hub/Lab): Wieso, weshalb, warum Versionskontrolle? Und wie?

Technische Informationsbibliothek (TIB)

addressLocality: Hanover

addressRegion: Lower Saxony


uk: вхід без авторизації

name: ALBERO: Wegfliegen Funken: Versuch 7 - Brand Batteriemodul mit Sprinkler, später zusätzlich Löschdecke, Typ B


uk: вхід без авторизації

name: ALBERO: Glueheffekt Loch: Versuch 7 - Brand Batteriemodul mit Sprinkler, später zusätzlich Löschdecke, Typ B


uk: Комп'ютерні науки

description: We propose the omnidirectional 3D display system which displays directly touchable 3D images. The display surface of the proposed display is cylindrical, and displayed 3D images are observed around the display surface. The proposed system is composed of multiple basic display units. Each basic display unit consists of an LCD, a microlens array (or an HOE), and a relay optics. The display surface of the proposed system is the virtual screen which is composed of multiple light focusing points (3D pixels) equally spaced in a cylindrical shape. Therefore, the display surface is not the physical obstruction when observers touch 3D images directly. We constructed the prototype system to verify the effectiveness of the proposed system. The virtual cylindrical display surface was composed of 24 basic display units. The angle of view of each 3D pixel which forms the virtual cylindrical display surface was 15°, and each 3D pixel irradiated 36 light rays at 0.4° intervals. The diameter and the height of the virtual cylindrical display surface were 5cm both. A displayed 3D images was directly touchable and was observed from 360° directions. This paper describes the principle of the proposed omnidirectional 3D display, and also describes the experimental results. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: 360-degree three-dimensional display with the virtual display surface


uk: Комп'ютерні науки

description: The rapid development of 3D display technologies allows consumers to enjoy the 3D world visually through different display systems such as the stereoscopic, multiview, and light field displays. On the other hand, the conventional multiview synthesis-based 3D rendering technique demands more memory usage and computation time as the number of views is increased in multiview or light field displays. Conventional 3D rendering processing for 3D display becomes complex in order to generated real like 3D display image. This paper proposes a novel method to generate light rays of 3D display not by the conventional algorithm such as multiview rendering method technique but by 3D direct light field rendering. Our algorithm interprets light rays from 3D display and input color and disparity value in the light field domain, and it significantly reduces the computational complexity and memory usage. Since direct light field rendering algorithm is different from general multiview image processing algorithms, we propose new 3D image generation algorithm for hole filling, boundary matting, and view filtering from common stereo input images. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: 3D autostereoscopic display image generation using direct light field rendering


3D will be back but not as we know it

uk: Комп'ютерні науки

description: GoPro launched the “DualHero 2.0” stereo rig in 2014. This offered amazing sync ability (pixel level), low cost and high resolution (17:9 2.7K@30p  which looks amazing when viewed on a 4K 3D monitor). But the consumer stereo 3D market had already crashed. 3D continues to be a strong attraction at the cinema because the viewing experience is carefully controlled. This same challenge is now plainly visible in the emerging VR, AR and MR technologies, but there are really compelling reasons why 3D, either as stereo output or depthmap will play an essential role in the coming video technologies. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації


3DTV: past, present and future

uk: Комп'ютерні науки

uk: вхід без авторизації


uk: Комп'ютерні науки

description: This paper describes a high resolution aerial 3D display using a time-division multiplexing directional backlight. In this system an aerial real image is generated with a pair of large convex lenses. The directional backlight is controlled based on the detected face position so that binocular stereoscopy may be maintained for a moving observer. By use of the directional backlight, the proposed system attains autostereoscopy without any moving parts. A wide viewing zone is realized by placing a large aperture convex lens between the backlight and the LCD panel. With the advantage of time-division multiplexing, a high resolution 3D image is presented to the viewer. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: A high resolution aerial 3D display using a directional backlight


uk: Комп'ютерні науки

description: For some years, a lot of Stereoscopic 3D contents have been released. Even if the depth sensation is realistic, it is still not perfect and uncomfortable. The objective of our work is to use the gaze of the user to bring closer artificial vision and natural vision to increase the precision of the perception and decrease visual fatigue. For example, a difference in artificial vision is the accommodation point and the convergence point of the eye. In natural vision, these points are the same whereas in artificial vision event if the convergence point is on the looked object, the accommodation point remains on the screen. This difference bring visual fatigue. In this article, we propose and evaluate the effect of an artificial blur in peripheral vision in order to reduce the accommodation vergence conflict and so the strain. We found that adding a blur in peripheral vision decreases the visual fatigue but this blur can’t be used actually due to eye-tracker latency. In a future work, we will investigate the effect of vertical parallaxes on shape perception, distance perception and visual fatigue. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: An adaptive blur in peripheral vision to reduce visual fatigue in stereoscopic vision


uk: Комп'ютерні науки

description: The affordability of head-mounted displays and high-resolution cameras has prompted the need for efficient playback of stereoscopic videos using a wide field-of-view (FOV). The MARquette Visualization Lab (MARVL) focuses on the display of stereoscopic content that has been filmed or computer-generated using a large-scale immersive visualization system, as well as head-mounted and augmented reality devices. Traditional approaches to video playback using a plane fall short with larger immersive FOVs. We developed an approach to playback of stereoscopic videos in a 3D world where depth is determined by the video content. Objects in the 3D world receive the same video texture but computational efficiency is derived using UV texture offsets as opposing halves of a frame-packed 3D video. Left and right cameras are configured in Unity via pulling masks so that they only uniquely show the texture for the corresponding eye. The camera configuration is then constructed through code at runtime using MiddleVR for Unity 4, and natively in Unity 5. This approach becomes more difficult with multiple cameras and maintaining stereo alignment for the full FOV, but has been used successfully in MARVL for applications including employee wellness initiatives, interactivity with high-performance computing results, and navigation within the physical world. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: An efficient approach to playback of stereoscopic videos using a wide field-of-view


uk: Комп'ютерні науки

description: Light field displays have been primarily targeted for auto-stereoscopic displays: with multiple views across a wide viewing angle, people from different perspectives are able to see slightly different contents. Recently, by showing a High-Angular-Resolution light field to a single viewer, new applications and algorithms are developed to enhance the visual experience. Vision-correcting displays let eyes with aberrations see the display in sharp focus without wearing eye-glasses; this is enabled by approximating the inverse aberrations using a dense light field. Another application of the High-Angular-Resolution light field solves the Vergence-Accommodation-Conflict by supporting focus cues in a VR headmount. We showed that, by exploring the compressibility of near-eye light fields, perceived spatial resolution of the display can be greatly enhanced when compared to prior work. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Application of light field displays to vision correction and accommodation support


uk: Комп'ютерні науки

description: The recent resurgence of VR is exciting and encouraging because the technology is at a point that it soon will be available for a very large audience in the consumer market. However, it has also been a little bit disappointing to see that VR technology is mostly being portrayed as the ultimate gaming environment and the new way to experience movies. VR is much more than that, there has been a wide number or groups around the world using VR for the past twenty years in engineering, design, training, medical treatments and many other areas beyond gaming and entertainment that seem to have been forgotten in the public perception. Furthermore, VR technology is also much more than goggles, there are many ways to build devices and systems to immerse users in virtual environments. And finally, there are also a lot of challenges in aspects related to creating engaging, effective, and safe VR applications. This talk will present our experiences in developing VR technology, creating applications in many industry fields, exploring the effect of VR exposure to users, and experimenting with different immersive interaction models. The talk will provide a much wider perspective on what VR is, its benefits and limitations, and how it has the potential to become a key technology to improve many aspects of human life. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Beyond fun and games: VR as a tool of the trade


uk: Комп'ютерні науки

description: We propose an original sampling technique for surfaces generated by stereoscopic acquisition systems. The idea is to make the sampling of these surfaces directly on the pair of stereoscopic images, instead of doing it on the meshes created by triangulation of the point clouds given by the acquisition system. Point clouds are generally dense, and consequently the resulting meshes are oversampled (this is why a re-sampling of the meshes is often done). Moving the sampling stage in the 2D image domain greatly simplifies the classical sampling pipeline, allows to control the number of points from the beginning of the sampling/reconstruction process, and optimizes the size of the generated data. More precisely, we developed a feature-preserving Poisson-disk sampling technique applied to the 2D image domain - which can be seen as a parameterization domain - with inter-sample distances still computed in the 3D space, to reduce the distortion due the embedding in R^3. Experimental results show that our method generates 3D sampling patterns with nice blue noise properties in R^3 (comparable to direct 3D sampling methods), while keeping the geometrical features of the scanned surface. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Blue noise sampling of surfaces from stereoscopic images


uk: Комп'ютерні науки

description: Lytro is building a revolutionary system to record and render the light-field of live-action video, enabling viewers to immerse themselves in 3D cinematic VR experiences. In this presentation, we will describe our system design for capturing, processing, and rendering light-field video and discuss the significant data and computing challenges to be solved on our journey. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Capturing and rendering light-field video: Approaches and challenges


uk: Комп'ютерні науки

uk: вхід без авторизації

name: Curtin HIVE – Hub for Immersive Visualization and eResearch


uk: Комп'ютерні науки

description: In this paper, we propose a data-driven approach for automatically estimating a plausible depth map from a single monocular image. Instead of using complicated parametric model, we cast the estimation as a simple yet effective regression problem. We first retrieve semantically similar RGB and depth candidates from database using an activation descriptor. Then, initial estimates are synthesized based on block-matching and robust patch regression. Finally, a weighted median filter (WMF) is adapted to further align depth boundaries to RGB edges. We explicitly take texture-removing technique into consideration for visually plausible results. Experimental results on natural images show that the proposed method outperforms existing approaches in term of both qualitative and quantitative evaluations. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Depth extraction from a single image based on block-matching and robust regression


uk: Комп'ютерні науки

description: In this study investigated the effect of the frame design of a simple smartphone HMD on the stereoscopic vision and considered the design requirements for comfortable viewing environment. We mainly focused on the lens spacing used in screen enlargement and extension of the focal length. To investigate the differences in the fusional limit attributable to lens spacing, three HMDs with left/right eye-lens spacing of 57.5, 60, and 62.5 mm were utilized. When the three types of HMD and display were compared, the positive and negative direction fusional limits were closer than the display for all HMDs. In particular, that of 62.5 mm condition was shifted to significantly proximal in comparison with the control condition. The results showed a trend that the fusional range becomes nearer in a simple HMD. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Effect of inter-lens distance on fusional limit in stereoscopic vision


uk: Комп'ютерні науки

description: In this research, the effect of enhancement of arousal by 2D to 3D conversion and disparity modification of emotional images was examined in terms of time perception. From the results of the experiment, lengthening of the estimation was found for longer duration range of the 3D condition and the disparity modification condition, and the tendency was significant for the high arousal images. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Emotional arousal by stereoscopic images and the effects on time perception


uk: Комп'ютерні науки

description: In stereo 3D, dynamic horizontal image translation (DHIT) is an important technique to mitigate visually stressing depth discontinuities during scene cuts by slowly shifting the stereo 3d views in opposite directions just before and after a scene cut. Thereby, the disparity of objects of interest is adjusted. This kind of scene cut is also known as an “active depth cut”. The DHIT can also be applied to reduce the accommodation vergence conflict, which, today, is the main source for visual fatigue. The perception of DHIT by a human observer is investigated in the course of this work and design recommendations for the DHIT in stereo production or for parameterization of automatic DHIT systems are given. An example for an automatic system is our previously proposed eye tracking based approach “GACS3D”, where the current point of gaze of the subject is brought into the zero parallax setting by applying DHIT. This kind of gaze adaptive processing is supposed to reduce visual fatigue in a single user environment. The effectiveness of this approach as well as the implications for the perception are also investigated in this work. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Evaluation of the perception of dynamic horizontal image translation and a gaze adaptive approach


uk: Комп'ютерні науки

description: The aim of this study is to help ophthalmologists and opticians during the diagnostic process of the retinal fundus. We propose a computer-vision-based solution that allows, from stereo images, the extraction of clinical parameters and/or the generation of multi-viewpoint images of the retinal fundus. This goal can be achieved by estimating the disparity map of the stereo images. For more precise clinical parameter extraction, a sub-pixel approach could be used. Additionally, the a priori knowledge of the fundus geometric shape provides useful information for the disparity map estimation process. In this paper we propose a sub-pixel disparity estimation algorithms that takes into consideration the geometric shape of the retinal fundus. Different stereo images, with known and unknown ground truth, are used to compare the proposed algorithms to state-of-the-art algorithms and to demonstrate the efficiency of our proposed method. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Geometrically constrained sub-pixel disparity estimation from stereo images of the retinal fundus


uk: Комп'ютерні науки

description: Critical collaborative work session rely on sharing 2D and 3D information. Limitations in display options make it difficult to share and interact with multiple content types content simultaneously. As a result, displays capable of showing stereoscopic content are predominately used for 2D applications. This presentation will illustrate Hybrid Reality—a strategy for showing and interacting with 2D and 3D content simultaneously on the same display. Example displays, use cases, and case studies will be discussed. By using the Hybrid Reality environment, manufacturing organizations have achieved ROI with time and cost savings as well as improved collaboration for complex design problems. In higher education, Hybrid Reality displays support instruction and curriculum design by providing a process to share a wide spectrum of 2D and 3D media and applications into classroom setting. This presentation will share detailed case studies of both applications. This presentation will demonstrate how a Hybrid Reality display system can be used to effectively combine 2D and 3D content and applications for improved understanding, insight, decision making, and collaboration. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Hybrid reality: Using 2D and 3D together in a mixed mode display


uk: Комп'ютерні науки

description: In a context of virtual reality being ubiquitous in certain industries, as well as the substantial amount of literature about the visual fatigue it causes, we wondered whether the presentation of intermittent S3D stimuli would lead to improved depth perception (over monoscopic) while reducing subjects’ visual asthenopia. In a between-subjects design, 60 individuals under 40 years old were tested in four different conditions, with head-tracking enabled: two intermittent S3D conditions (Stereo @ beginning: S3D at task onset linearly transitioning to mono in 3 seconds; Stereo @ end: monoscopic at task onset for 4 seconds, linearly transitioning to S3D in 3 seconds) and two control conditions (Mono: monoscopic images only; Stereo: constant S3D). Several optometric variables were measured pre- and post-experiment, and a subjective questionnaire assessing discomfort was administered. Our results suggest a difference between simple scenes (containing few static objects, or slow, linear movement along one axis only), and more complex environments with more diverse movement. In the former case, Stereo @ beginning leads to depth perception which is as accurate as Stereo, and any condition involving S3D leads to more precision than Mono. We posit that the brain might build an initial depth map of the environment, which it keeps using after the suppression of disparity cues. In the case of more complex scenes, Stereo @ end leads to more accurate decisions: the brain might possibly need additional depth cues to reach an accurate decision. Stereo and Stereo @ beginning also significantly decrease response times, suggesting that the presence of disparity cues at task onset boosts the brain’s confidence in its initial evaluation of the environment’s depth map. Our results concerning fatigue, while not definitive, hint at it being proportional to the amount of exposure to S3D stimuli. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Investigating intermittent stereoscopy: Its effects on perception and visual fatigue


LEIA 3D: holographic reality

uk: Комп'ютерні науки

description: Ever since Doug Engelbart presented the first modern computer interface with his famous “Mother of All Demos,” we have strived to achieve more intuitive ways to interact with digital information. That interface has not fundamentally changed over the past half-century, though, even as the scope of information continues to exponentially increase. As we now look to computerized AI to help us navigate and make sense of all of our shared data, we also require a new way to present the information that is intuitive and useful to us. Holographic Reality (HR) is based on “holographic” 3D screens that do not require any eyewear to function. These screens must produce realistic, full-parallax 3D imagery that can be manipulated in mid-air by finger or hand gestures. They must provide the same high quality imagery throughout the field of view, no jumps, bad-spots or other visual artefact. Augmented by Haptic technology (tactile feedback), these screens will even let us “feel” the holographic content physically at our fingertips. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації


uk: Комп'ютерні науки

description: The ultimate goal of any auto-stereoscopic display is to reproduce exact light fields of 3D scenes on the display’s surface. However, most existing displays can only reproduce inexact light fields. Filling the gap between them has been a major target of research. In this work, we present a light field modulator consisting of a LC (liquid crystal) panel, a light diffuser, and a pair of lenticular sheets. The modulator will modify the intensity of light passing through it. When combined with a color filter, the modulator can also modify the color tone. Since the modification is dependent on the light’s direction, the modulator can be tuned to improve the light field from being inexact to being nearly exact. To further investigate the modulator’s capability, we put it in front of a multi-layer display. The light fields reproduced by a multi-layer display are only approximate especially when the display is tailored to cover a wide viewing zone. We observe that the modulator can mitigate the occurrence of artifacts in the outputted light fields. We also observe that monochromatic fields can be converted into color fields using the modulator. © 2016, Society for Imaging Science and Technology (IS&T).

uk: вхід без авторизації

name: Light field modulation using a double-lenticular liquid crystal panel