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Methods and devices for defective pixel detection

  • US 8,571,346 B2
  • Filed: 10/26/2005
  • Issued: 10/29/2013
  • Est. Priority Date: 10/26/2005
  • Status: Active Grant
First Claim
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1. A method of image signal processing for a digital imaging device comprising:

  • determining, in an electronic system, defective pixels on-the-fly in a digital image representation based on a comparison of a contrast of a pixel under evaluation with a contrast of its surrounding pixels, with reference to a known resolving capability of a lens-sensor arrangement that captured said digital image representation, wherein said determining includes;

    if said pixel under evaluation is in a flat image region, increasing said known resolving capability by a first percentage,if said pixel under evaluation is in an edge image region, increasing said known resolving capability by a second percentage greater than said first percentage, andif said digital image representation is captured in a low light level condition, decreasing said known resolving capability by a third percentage greater than said second percentage; and

    in response to said determination correcting said defective pixels.

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