Error diffusion without contouring effect

Abstract

A modified error-diffusion algorithm that eliminates the false-texture contour phenomenon that usually appears in the halftone images is presented. The main idea behind our modification is to introduce a local filter that can smooth the false-texture contours of the low variation regions in the images generated by the standard error-diffusion algorithm. Experimental results are included. (C) 1997 SPIE and IS&T.