| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of object compositions in an apparatus for drawing an object-based image by one pixel at a time in scanline order. SOLUTION: The apparatus 20 comprises an optimization module 550 for generating a set of compositing messages during a first pixel in a run of pixels between adjacent edges of one or two objects, and for generating a reduced set of compositing messages from the set during the subsequent pixels in the run of pixels. The apparatus 20 further comprises a pixel compositing module 700 which in addition to compositing the first pixel in the run of pixels also stores a result or partial result of the compositing of the first pixel. The pixel compositing module 700 utilizes the reduced set of compositing messages and the stored result or partial result to composite pixels in the run subsequent to the first pixel. COPYRIGHT: (C)2005,JPO&NCIPI |
