METHOD FOR SELECTING OUTPUT COLOR OF OBJECT PIXEL, AND ERROR PROPAGATION METHOD FOR DIGITAL HALF-TONING

摘要

PROBLEM TO BE SOLVED: To reduce an artifact of a display image and to prevent the picture quality from being degraded. SOLUTION: An output color of an object pixel is selected by comparing an input color signal with a border which divides effective output colors. The input color signal is adjusted at least partially so as to reflect the relationship between the output color and input color signal on other pixels. Further, the border is adjusted at least partially to vary the scale of a noise source.