Patent ID: 7688473
Filing Date: 2010-03-30
Classification: H04N

Abstract:
1. An image processing method for producing image objects with enhanced halftone edges comprising: defining, with a computational device, a pixel border region and an interior region within an image object, the image object initially having a first halftone screen having a first fundamental frequency and a first angle, printing pixels within the interior region using the first halftone screen; and selecting, with the computational device, a second halftone screen having a second fundamental frequency and a second angle for printing pixels within the pixel border region, the second halftone screen selected to have a boosted contone level relative to the first halftone screen wherein the second frequency and second angle are harmonically matched to the first frequency and first angle, and wherein the boosted contone level is determined based upon values stored in at least one pre-defined lookup table that are associated with a combination of contone levels in the interior region and upon contone levels in the pixel border region.