CompressÃo de texturas utilizando sÃntese de texturas

AUTOR(ES)

Fernando Leal Brayner

DATA DE PUBLICAÇÃO

2009

RESUMO

In spite of graphics hardware advancements, graphics memory is still a scarce resource for usual applications. Besides, for most raster-based applications, the available bandwidth is one important limiting factor for increasing performance in the system. Texture compression addresses both of these problems. We introduce a new technique for texture compression based on texture synthesis from patches. The compressed texture stores the sample plus encoded data, gathered during synthesis, which enables real-time decompression of large textures. With this scheme we are able to achieve high compression rates. Once the texture is synthesized, our scheme compresses the high resolution texture without loss of information. Our solution explores a spectrum of textures where general texture compression schemes achieve less than optimal compression rates. These are usually textures with repeating patterns, regular or nearregular ones, stochastic ones, the exactly types of textures where texture synthesis algorithms tend to work greatly. We also present analytical formulae for our compression scheme that allows an exact computation of compression rates achieved

ASSUNTO(S)

texturas ciencia da computacao synthesis graphics processing unit compressÃo texture unidade de processamento grÃfico compression sÃntese

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