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Image processing method and apparatus for recovering reading faults

  • US 7,382,502 B2
  • Filed: 02/27/2004
  • Issued: 06/03/2008
  • Est. Priority Date: 02/28/2003
  • Status: Expired due to Fees
First Claim
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1. An image processing method for recovering reading faults from digitized image data of an input image read from an image recording medium, the faults being due to imperfections present on the image recording medium, said method comprising the steps of:

  • detecting defective pixels influenced by said imperfections;

    performing an interpolating process for said defective pixels to create corrected pixel values for said defective pixels;

    calculating standard deviations of pixel values forming the image data, and determining granularity of said input image based on said standard deviations; and

    adding a value obtained by multiplying said granularity by a random number to said corrected pixel values for each defective pixel.

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