METHOD AND SYSTEM FOR REDUCING AUTO-MOIRE ARTIFACTS IN PERIODIC HALFTONE SCREENING

摘要

The design of periodic screens for halftone patterns is based upon a series of constrained optimization problems. For each of a number of input levels, a pattern is found that minimizes a cost function. The cost function is a spatial-frequency weighted difference between an ideal, continuous-space pattern and a predicted reconstructed pattern. The frequency weighting is a parameterized trade-off between the preservation of periodic components and the introduction of non-harmonic components.