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Calculating noise from multiple digital images having a common noise source

  • US 6,934,421 B2
  • Filed: 03/20/2002
  • Issued: 08/23/2005
  • Est. Priority Date: 03/20/2002
  • Status: Expired due to Term
First Claim
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1. A method for estimating a noise characteristic value for a plurality of digital images that are affected by a common noise source, comprising the steps of:

  • a) receiving a plurality of source digital images that are affected by a common noise source, each source digital image including a plurality of pixels;

    b) calculating a total number of pixels included in the source digital images;

    c) receiving a predetermined target number of noise estimates to be calculated for the source digital images;

    d) using the total number of pixels and the predetermined target number of noise estimates to calculate one or more pixel sampling parameters for the source digital images;

    e) using the source digital images and the one or more pixel sampling parameters to calculate a predetermined number of noise estimates; and

    f) using the noise estimates to calculate a noise characteristic value for the source digital images.

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