Shell rendering com fatoração shear-warp

AUTOR(ES)

Leonardo Marques Rocha

DATA DE PUBLICAÇÃO

2002

RESUMO

In volume visualization, shell rendering and shear-warp rendering are among the most efficient methods. Shell rendering utilizes a more compact data representation than shear warp rendering. On the other hand, shear-warp rendering allows a more efficient rendition due to the shear-warp factorization of the viewing matrix. This work proposes an extension of the data structure of shell rendering to allow shear-warp factorization of the viewing matrix. The new method, named shell rendering with shear-warp factorization, provides the best cost x benefit compromise among the methods, considering three aspects: image quality, speed of rendering, and memory requirements. This dissertation presents a review of the main concepts in volume visualization, describes the methods shell rendering, shear-warp rendering and shell rendering with shear-warp factorization pointing out their differences in the computational aspects, and presents a comparative analysis among them. Another important contribution reported in this dissertation is a conceptual mistake of shell rendering, which affects the correctness of the rendering, and as consequence the final image quality

ASSUNTO(S)

visualização computação grafica fatoração (matematica) processamento de imagens

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