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RESTORATION OF DEGRADED PHOTOGRAPHIC IMAGES

  • US 3,627,920 A
  • Filed: 04/03/1969
  • Issued: 12/14/1971
  • Est. Priority Date: 04/03/1969
  • Status: Expired due to Term
First Claim
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1. The method of restoring photographs blurred because of linear motion of a camera relative to an image during exposure, which comprises the steps of:

  • analyzing a photograph to develop a video signal countErpart thereto, developing a parameter signal to identify the extent of blurring in said photograph, transforming said parameter signal into additive periodic signal components which correspond to blur components in said video signal, identifying the magnitude and period of said periodic signal components, and subtracting said periodic signal components from said video signal, an electrical signal representation of the information in said photograph, means for analyzing said representation in each of two orthogonal directions to produce signals which denote cepstral peaks in said representation, means for selecting the direction which exhibits a series of large cepstral peaks as an indication of the direction of blurring in said photograph, and means for measuring the interval between cepstral peaks in said signal representation to produce an indication of the extent of blurring in said photograph.

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