Method and system for reducing auto-moire artifacts in periodic halftone screening
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United States of America Patent
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Issued Date -
May 22, 2008
app pub date -
Nov 20, 2006
filing date -
Nov 20, 2006
priority date (Note) -
Abandoned
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Abstract
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.
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