New Halftone Methods for Better Distribution of Multi-Level Dots

Abstract

Two halftone methods to get better distribution of multi level dots such as thick and thin ink dots or large, medium and small size dots are newly suggested. The 1st is an improvement of an error diffusion method which affords higher quality output, and it got The Prize of the Minister of Economy Trade and Industry at the 2003 National Commendation for Invention. The 2nd is an improvement of an ordered dither method which affords faster processing. The combination of these two methods is also available.