Incremental update of graphical images when using...

Details Incremental update of graphical images when using... Incremental update of graphical images when using...

2005-09-20

2005-09-20

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S582000

Reexamination Certificate

active

06947058

ABSTRACT:
An approach for incrementally updating graphical images when using anti-aliasing techniques is disclosed. Data for an original color is stored, and an image is filtered based on the original color. A new color for an image portion less than the entire image is identified. The new color is used with the old color to re-filter the image portion. The re-filtering may be performed by a two-step approach in which the image portion is filtered using the negative of the original color and then the image portion is filtered using the new color. The re-filtering may be performed by a one-step approach in which the portion of the image is filtered using the difference between the new color and the old color. The appearance of a halo around the portion of the image that would otherwise occur when filtering based on only the new color is thereby avoided.

REFERENCES:
patent: 6005580 (1999-12-01), Donovan
patent: 6456291 (2002-09-01), Fowler
patent: 6661463 (2003-12-01), Geshwind
patent: 6664955 (2003-12-01), Deering
patent: 2002/0005862 (2002-01-01), Deering
Heckbert, Paul S., “Survey of Texture Mapping,” IEEE Computer Graphics and Applications, Nov. 1986, pp. 56-67.

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