Fitzpatrick, Cella, Harper & Scinto
Alpha-channel compositing system
A compositing system (300) that comprises an optimized alpha-channel compositing module (303) is disclosed. The compositing system (300) optimizes the range correction in the alpha-channel compositing module (303) by using a constant divider (401) and delaying the correction of an alpha value until after the summation of the alpha values from all contributing regions. Uncorrected opacity values are used to index a look-up table in order to reduce the data processing path to a multiplier (407) for processing after premultiplication of a color values from all contributing regions.
Canon Kabushiki Kaisha
G G G
G06T G06T G09G
inventional inventional additional
Yu-Ling
Chen