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CGF
2002

Using Perceptual Texture Masking for Efficient Image Synthesis

9 years 3 months ago
Using Perceptual Texture Masking for Efficient Image Synthesis
Texture mapping has become indispensable in image synthesis as an inexpensive source of rich visual detail. Less obvious, but just as useful, is its ability to mask image errors due to inaccuracies in geometry or lighting. This ability can be used to substantially accelerate rendering by eliminating computations when the resulting errors will be perceptually insignificant. Our new method precomputes the masking ability of textures using aspects of the JPEG image compression standard. This extra information is stored as threshold elevation factors in the texture's mip-map and interpolated at image generation time as part of the normal texture lookup process. Any algorithm which uses error tolerances or visibility thresholds can then take advantage of texture masking. Applications to adaptive shadow testing, irradiance caching, and path tracing are demonstrated. Unlike prior methods, our approach does not require that initial images be computed before masking can be exploited and i...
Bruce Walter, Sumanta N. Pattanaik, Donald P. Gree
Added 17 Dec 2010
Updated 17 Dec 2010
Type Journal
Year 2002
Where CGF
Authors Bruce Walter, Sumanta N. Pattanaik, Donald P. Greenberg
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