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Systems and methods for moiré-reduced halftoning

  • US 6,717,696 B1
  • Filed: 06/28/1999
  • Issued: 04/06/2004
  • Est. Priority Date: 06/28/1999
  • Status: Expired due to Term
First Claim
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1. A moiré

  • effect reduction system, comprising;

    a halftone conversion circuit that converts an original image into a halftone image;

    an output device modeling circuit that predicts a continuous-tone image from the halftone image;

    an image comparison circuit that determines a feedback image based on the original image and the predicted continuous-tone image;

    a filtering circuit that filters the feedback image to yield a filtered feedback image; and

    an image mapping circuit that maintains an appropriate window based on a predetermined halftone screen, wherein the image comparison circuit compares the filtered feedback image and the original image to yield an adjusted image; and

    the filter circuit and the image mapping circuit select a value of pixels neighboring a target pixel of the window to determine a center pixel value.

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