Encontrados 13 documentos, a visualizar página 1 de 2
Bespoke high-fidelity visualization of tiling
Santos, Luís Paulo; Wood, Jonathan; Selmanovic, Elmedin; Harvey, Carlo; Debattista, Kurt; Chalmers, AlanThis paper describes the development and validation of a new service allowing products, such as tiles, to be viewed on a computer authentically in the actual lighting conditions of the area in which they are to be installed. This service leverages recent developments in physically based global illumination and High Dynamic Range (HDR) imaging, enabling real-world lighting to be accurately captured, transferred ...
Editorial : Computers & Graphics journal special section on cultural heritage
Chalmers, Alan; Mudge, Mark; Santos, Luís PauloEditorial special section ; An increasing number of Cultural Heritage professionals are using Computer Graphics technology to unlock and document the secrets of humanity's legacy. Earlier this year, a recent special issue of this journal published some of the important results from the intersection of these two fields [1]. The level of interest and the quality of submissions was such that an additional special...
Special section on cultural heritage
Chalmers, Alan; Mudge, Mark; Santos, Luís PauloEditorial of special section on Cultural Heritage ; Over the last two decades, there have been many high profile success stories where cutting edge computer graphics (CG) technology was used in collaboration with cultural heritage (CH) professionals to unlock the secrets of humanity’s legacy. Well known examples include the empirical 3D acquisition of Michelangelo’s David, the laser scan-based 3D mapping of th...
Wait-free shared-memory irradiance caching
Debattista, Kurt; Dubla, Piotr; Santos, Luís Paulo; Chalmers, AlanParallelizing rendering algorithms to exploit multiprocessor and multicore machines isn't straightforward. Certain methods require frequent synchronization among threads to obtain benefits similar to the sequential algorithm. One such algorithm is the irradiance cache (IC), an acceleration data structure that caches indirect diffuse irradiance values. In multicore systems, the threads must share the IC to achie...
Instant caching for interactive global Iilumination
Debattista, Kurt; Dubla, Piotr; Banterle, Francesco; Santos, Luís Paulo; Chalmers, AlanThe ability to interactively render dynamic scenes with global illumination is one of the main challenges in computer graphics. The improvement in performance of interactive ray tracing brought about by significant advances in hardware and careful exploitation of coherence has rendered the potential of interactive global illumination a reality. However, the simulation of complex light transport phenomena, such ...
Wait-free shared-memory irradiance cache
Dubla, Piotr; Debattista, Kurt; Santos, Luís Paulo; Chalmers, AlanThe irradiance cache (IC) is an acceleration data structure which caches indirect diffuse irradiance values within the context of a ray tracing algorithm. Previously calculated values can be stored and reused in future calculations; such reutilisation enables exploitation of spatial and, in static scenes, temporal coherence, resulting in an order of magnitude improvement in computational performance. In multith...
There-reality : selective rendering in high fidelity virtual environments
Chalmers, Alan; Debattista, Kurt; Mastoropoulou, Georgia; Santos, Luís PauloThere-reality environments are those virtual environments which evoke the same perceptual response from a viewer as if they were actually present, or there, in the real scene being depicted. While it is possible to compute highly accurate representations of real scenes, the computational requirements of such a full physically-based global illumination solution are significant, currently precluding its computati...
Visualização de espaços arqueológicos usando High Dynamic Range
Gonçalves, Alexandrino José Marques; Magalhães, Luís Gonzaga; Moura, João Paulo; Chalmers, AlanComunicação apresentada no V Congresso CAA Portugal de Aplicações Informáticas à Arqueologia, Leiria, 2007. ; É hoje amplamente reconhecido que os sistemas informáticos desempenham um papel fundamental no estudo e interpretação de espaços arqueológicos. Uma das suas principais áreas de aplicação é, seguramente, a reconstrução virtual de ambientes históricos, em particular os que já não existem. Neste domínio, ...
Metodologia para a geração de imagens High Dynamic Range em iluminação romana
Gonçalves, Alexandrino José Marques; Magalhães, Luís Gonzaga; Moura, João Paulo; Chalmers, AlanComunicação apresentada no International Association for the Scientific Knowledge - InterTIC'07, Porto, 2007. ; Num futuro muito próximo, o modo como veremos conteúdos num qualquer dispositivo de visualização irá sofrer profundas alterações. A luz captada pelo olho humano num simples passeio pela praia num radioso dia de sol, pode atingir valores de intensidade e cromaticidade verdadeiramente astronómicos. No ...
Accelerating the irradiance cache through parallel component-based rendering
Debattista, Kurt; Santos, Luís Paulo; Chalmers, AlanThe irradiance cache is an acceleration data structure which caches indirect diffuse samples within the framework of a distributed ray-tracing algorithm. Previously calculated values can be stored and reused in future calculations, resulting in an order of magnitude improvement in computational performance. However, the irradiance cache is a shared data structure and so it is notoriously difficult to parallelis...
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