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Elimination of visible quantizing artifacts in a digital image utilizing a critical noise/quantizing factor

  • US 5,809,178 A
  • Filed: 06/11/1996
  • Issued: 09/15/1998
  • Est. Priority Date: 06/11/1996
  • Status: Expired due to Term
First Claim
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1. A method for eliminating visible quantizing artifacts in a digital image, the method comprising:

  • (a) determining a function descriptive of a noise model for an input source of image data;

    (b) utilizing a critical noise/quantizing factor in conjunction with the noise model function to determine a quantization function; and

    (c) deriving optimum coding for the image data from the quantization function to produce digital image data lacking visible quantization artifacts.

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