Anisotropic filtering

Details Anisotropic filtering Anisotropic filtering

2005-09-20

2005-09-20

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S583000, C345S587000, C345S611000, C345S612000, C345S613000, C382S260000, C708S308000

Reexamination Certificate

active

06947054

ABSTRACT:
Embodiments of the invention provide an anisotropic filtering configuration where a ratio value is computed as the ratio of the major axis to the minor axis of a pixel projection on a texture map. The number of subpixels generated and sampled is based upon the value of the ratio. For four-way anisotropic filtering, subpixels are generated that move as the computed ratio between the major and minor axis increases. Subpixels may be placed anywhere from 0.5 to 1.5 texel distance from the pixel center depending on the computed ratio. The contribution of the subpixels is equally weighted.

REFERENCES:
patent: 5920495 (1999-07-01), Hicok et al.
patent: 6724395 (2004-04-01), Treichler
patent: 2002/0126133 (2002-09-01), Ewins

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