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Reducing noise in digital images

  • US 7,813,586 B2
  • Filed: 08/07/2006
  • Issued: 10/12/2010
  • Est. Priority Date: 08/07/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • determining an unknown amplitude A of noise that contaminates at least some of the pixels of a digital image T of an arbitrary target, the amplitude being possibly different in different digital images, the determination being based on the digital image T and on a reference digital image that is representative of the contaminating noise and obtained by the same sensor,the determination being made from a decorrelation condition;

    Correlation (T−

    A*{the reference digital image}, {the reference digital image})=0,the determination being made over pixels in some regions of T and the reference digital image, to estimate the amplitude of the noise for each of at least some pixels of T.

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