Encontrados 16 documentos, a visualizar página 1 de 2
Síntese, simulação e a internet
Fernandes, António RamiresA síntese de imagem a partir descrições tridimensionais de ambientes virtuais, ou até de simples objectos, é um campo fascinante tanto para os investigadores da área como para o público em geral. A animação e a possibilidade de interagir com ambientes virtuais é certamente responsável por uma grande fatia deste fascínio. As aplicações derivadas da sintetização e simulação são extraordinariamente abrangentes ...
Path planning for complex 3D multilevel environments
Deusdado, Leonel Domingues; Fernandes, António Ramires; Belo, OrlandoThe continuous development of graphics hardware is contributing to the creation of 3D virtual worlds with high level of detail, from models of large urban areas, to complete infrastructures, such as residential buildings, stadiums, industrial settings or archaeological sites, to name just a few. Adding virtual humans or avatars adds an extra touch to the visualization pr...
Path planning for complex 3D multilevel environments
Deusdado, Leonel; Fernandes, António Ramires; Belo, OrlandoThe continuous development of graphics hardware is contributing to the creation of 3D virtual worlds with high level of detail, from models of large urban areas, to complete infrastructures, such as residential buildings, stadiums, industrial settings or archaeological sites, to name just a few. Adding virtual humans or avatars adds an extra touch to the visualization providing an enhanced perc...
Pedestrians behavior simulation in real 3D environments
Deusdado, Leonel; Belo, Orlando; Fernandes, António RamiresMassive virtual models are one of the most computer graphics pieces required on the Internet especially the ones that simulate three-dimensional urban scenarios. Additionally, the integration of “artificial life” components in these environments, demanding for a virtualization of life involving the static geometry, pioneer in computer games research. This clearly reveals a growing interest fo...
Simulação comportamental de pedestres em ambientes 3D desconhecidos
Deusdado, Leonel; Belo, Orlando; Fernandes, António RamiresA disponibilização massiva de modelos virtuais na Internet, representativos da construção de cenários urbanos tridimensionais é, actualmente, uma das tarefas mais requisitadas no domínio da computação gráfica. Tende-se, agora, a evoluir para a inclusão de “vida artificial” nesses ambientes, demandando uma virtualização da “vida” envolvendo a geometria estática, pioneira nos jogos de computador. Esta tendência r...
Parallel progressive precomputed radiance transfer
Santos, Luís Paulo; Valentim, Sérgio; Fernandes, António RamiresPrecomputed Radiance Transport (PRT) was introduced as a technique to enable interactive navigation and distant environmental real time relighting of rigid scenes. Evaluating radiance transport is, however, a computationally very demanding task, which precludes PRT's utilization during the model design phase, since the user must wait for long periods of time before being able to light and navigate within the mo...
Transcoding for web accessibility for the blind : semantics from structure
Fernandes, António Ramires; Carvalho, Alexandre; Almeida, J. J.; Simões, AlbertoTrue accessibility requires minimizing the scanning time to find a particular piece of information. Sequentially reading web pages do not provide this type of accessibility, for instance before the user gets to the actual text content of the page it has to go through a lot of menus and headers. However if the user could navigate a web page based through semantically classified blocks then the user could jump fa...
Efficient conservative collision detection for populated virtual worlds
Fernandes, António Ramires; Deusdado, Leonel DominguesLarge virtual worlds, with considerable level of detail are starting to emerge everywhere, from large areas of actual cities to archaeological detailed reconstructions of sites. Populating a virtual world adds an extra touch to the visualization of these worlds, but unfortunately it also brings an extra burden to the system. Several tasks are required when adding animated characters to a virtual world, such as ...
Testing AudioBrowser
Fernandes, António Ramires; Campos, J. CreissacWe are developing AudioBrowser, a browser for visually impaired users. This paper presents a usability analysis study that was carried out on the first version of the browser. Due to the lack of availability of visually impaired users not involved with the tool's design, we had to resort to s imulate a visual impaired situation with regular sighted users. Although this may seem unrealistic we believe that this ...
Accessibility and visually impaired users
Fernandes, António Ramires; Pereira, Jorge; Campos, J. CreissacInternet accessibility for the visually impaired community is still an open issue. Guidelines have been issued by the W3C consortium to help web designers to improve web site accessibility. However several studies show that a significant percentage of web page creators are still ignoring the proposed guidelines. Several tools are now available, general purpose, or web specific, to help visually impaired readers...
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