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Image data coding and compression system utilizing controlled blurring

  • US 5,453,844 A
  • Filed: 11/17/1993
  • Issued: 09/26/1995
  • Est. Priority Date: 07/21/1993
  • Status: Expired due to Term
First Claim
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1. A system for compressing and decompressing image data signals representing an original image characterized by p(x,y), where x and y are the spatial coordinates of pixels of the image, which system comprises:

  • (a) means to convolve said image data signals with coded random pattern data signals generated according to a blurring function ##EQU11## where N is an integer greater than one and xn and yn are the positions of delta-function impulses, xn and yn being chosen from distributions characterized by probability density functions, to provide convolved data signals representing a blurred image;

    (b) means to compress said convolved data signals to permit efficient storage or transmission of the information in said original image; and

    (c) means to recover said original image from said convolved compressed data signals with a function which is the inverse of said compressing means and said coded blurring means to provide data signals representing said original image in restored form.

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