| US 7,545,984 B1 | ||
| Quantifying graphics image difference | ||
| Jeffrey T. Kiel, Raleigh, N.C. (US); and Eldon S. Larsen, Carrboro, N.C. (US) | ||
| Assigned to Nvidia Corporation, Santa Clara, Calif. (US) | ||
| Filed on Dec. 16, 2004, as Appl. No. 11/15,598. | ||
| Int. Cl. G06K 9/68 (2006.01) | ||
| U.S. Cl. 382—220 [345/619; 382/221; 382/274] | 22 Claims |
| 1. A method implemented in a computer system for measuring difference between graphics images comprising:
performing, using a processing unit of the computer system, an arithmetic operation involving a first graphics image comprising
a plurality of first pixels and a second graphics image comprising a plurality of second pixels to produce a difference image
comprising a plurality of difference pixels;
generating, using the processing unit of the computer system, measures of proximity from a plurality of ranges of observation
within the difference image, wherein the measures of proximity represent spatial proximity of difference pixels to other difference
pixels within the difference image; and
applying, using the processing unit of the computer system, non-uniform weighting to the difference pixels to produce a weighted
difference image, wherein the non-uniform weighting depends on the measures of proximity generated from the plurality of ranges
of observation.
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