Method and apparatus for texture level of detail dithering
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United States of America Patent
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Feb 20, 2001
Grant Date -
N/A
app pub date -
Apr 1, 1998
filing date -
Apr 1, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A computationally efficient method for minimizing the visible effects of texture LOD transitions across a polygon. The minimization is accomplished by adding a dithering offset value to the LOD value computed for each pixel covered by a graphics primitive to produce a dithered pixel LOD value. The dithering offsets mat be generated from a table look-up based on the location of the pixel within a span of pixels. The dithered pixel LOD value is used to as an index in the selection of a single LOD texture map from which a textured pixel value is retrieved. The range of dithering offset values can be adjusted by modulating the values in the table look-up.
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