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Method of repairing scratches in digital images

  • US 7,324,704 B2
  • Filed: 09/11/2003
  • Issued: 01/29/2008
  • Est. Priority Date: 09/11/2003
  • Status: Expired due to Fees
First Claim
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1. A method of repairing scratches in digital images, the method comprising:

  • calculating a brightness difference between a selected pixel and one of neighboring pixels surrounding the selected pixel;

    counting the number of abnormal pixels among the neighboring pixels;

    designating as particular pixels the selected pixels surrounded by the abnormal pixels, wherein the number of abnormal pixels is more than a predetermined value;

    dividing an area surrounding each particular pixel into a plurality of blocks, and calculating a brightness difference between the blocks;

    finding out scratch pixels from the particular pixels based on brightness difference between blocks; and

    subdividing and filling up an area surrounded by scratch pixels,wherein the step of calculating brightness difference between the blocks includes estimating a mean square error of each block which has a plurality of pixels, and calculating the difference between the mean square errors.

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