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Rehalftoning of gray halftones with optimal screen frequency for robust suppression of moire

  • US 20030218779A1
  • Filed: 05/22/2002
  • Published: 11/27/2003
  • Est. Priority Date: 05/22/2002
  • Status: Active Grant
First Claim
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1. A method of rendering an image based on an original halftone image, the method comprising:

  • determining a frequency of a significant frequency component of the original halftone image;

    selecting a rehalftone frequency, based on the frequency of the significant frequency component, the selection being directed toward producing moiré

    of unobjectionably high frequency;

    rehalftoning the original halftone image at the selected rehalftone frequency; and

    , rendering the image based on the rehalftoning.

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