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Methods and systems for automatic detection of continuous-tone regions in document images

  • US 20050163374A1
  • Filed: 01/28/2004
  • Published: 07/28/2005
  • Est. Priority Date: 01/28/2004
  • Status: Active Grant
First Claim
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1. An image segmentation method, said method comprising:

  • a) obtaining pixel attribute data for a mixed-content image;

    b) identifying a text region in said image;

    c) identifying a background region in said image;

    d) analyzing areas in said image outside any of said background regions and outside any of said text regions to identify contone regions;

    e) analyzing said contone regions to identify any text regions present within said contone regions;

    f) analyzing said contone regions to identify any background regions present in said contone regions;

    g) analyzing areas in said contone regions outside any of said background regions and outside any of said text regions to identify contone sub-regions; and

    h) repeating steps e-g until no further sub-regions are found.

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