SYSTEM AND METHOD FOR OPTIMIZING PIXEL-BASED RASTER TRAPPING

摘要

PPROBLEM TO BE SOLVED: To permit identification of frame buffer pixels for trapping, based on a first bit in a flag associated with frame buffer pixels. PSOLUTION: Flags 720 associated with pixels 710 in the frame buffer may be used to provide an indication of pixels for trapping. A bit in a flag associated with a pixel may be set when the pixel is painted (Yes of 725), if the luminosity value of the pixel does not exceed a luminosity threshold. The method discloses a process for updating the value of the bit through a rasterization process. The pixel may be identified as a candidate for trapping, based on the value of the at least one bit at trapping time. PCOPYRIGHT: (C)2010,JPO&INPIT