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ADAPTIVE FILTER FOR LOW-LIGHT NOISE REDUCTION

  • US 20120127370A1
  • Filed: 11/19/2010
  • Published: 05/24/2012
  • Est. Priority Date: 11/19/2010
  • Status: Active Grant
First Claim
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1. An adaptive filter for filtering noise from a low-light image, the adaptive filter comprising:

  • a morphology filter for dilating an edge detected in the image, thereby dividing the image into a non-edge region and a dilated edge region; and

    a comparative filter for comparing a pixel in the non-edge region to a region surrounding the pixel and optionally replacing the pixel, based on a result of the comparison, with a new pixel derived at least in part from the region surrounding the pixel.

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