System, apparatus and method for subpixel shifting of sample...

Details System, apparatus and method for subpixel shifting of sample... System, apparatus and method for subpixel shifting of sample...

2008-05-06

2008-05-06

Sajous, Wesner (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S421000, C345S426000, C345S428000, C345S581000, C382S269000, C382S274000

Reexamination Certificate

active

11144996

ABSTRACT:
A system, apparatus, and method are disclosed for modifying positions of sample positions for selectably oversampling pixels to anti-alias non-geometric portions of computer-generated images, such as texture, at least in part, by translating (e.g., shifting) shading sample positions relative to a frame of reference in which there is no relative motion between the geometries and the coverage sample positions. In one embodiment, an exemplary method determines whether a coverage sample position is covered by a geometric primitive. The method includes translating a shading sample position from an original shading sample position to the coverage sample position. This generally occurs if the geometry covers the coverage sample position to form a covered coverage sample position. Further, the method samples a shading value at the covered coverage sample positions for the pixel portion to anti-alias, for example, texture to reduce level of detail (“LOD”) artifacts.

REFERENCES:
patent: 6720975 (2004-04-01), Dietrich, Jr.
patent: 6967663 (2005-11-01), Bastos et al.
patent: 2003/0029212 (2003-02-01), Im
U.S. Appl. No. 10/658,056, filed Sep. 8, 2003, Bastos, et al.
U.S. Appl. No. 10/960,857, filed Oct. 7, 2004, Bastos, et al.

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