Look-up-table based halftoning algorithm

Screening is a low complexity halftoning algorithm that has been widely use d in many applications, However, screen design requires that the stacking p roperty be obeyed. This constraint limits the texture quality at each gray level. We present a Look-up-table based halftoning algorithm for which the stacking constraint is not necessarily satisfied; but the binary patterns f or individual levels are still correlated, The binary patterns are designed level by level using the direct binary search method. The algorithm improv es halftone image quality compared with screening.