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Correlation techniques

  • US 4,164,728 A
  • Filed: 12/09/1977
  • Issued: 08/14/1979
  • Est. Priority Date: 12/11/1976
  • Status: Expired due to Term
First Claim
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1. A correlation arrangement comprising storage means containing storage locations for storing data relating to first and second two-dimensional representations of substantially the same scene, selector means for selecting data from groups of said storage locations, each group containing data relating to a respective substantially linear region of one or other of said representations, means for individually combining the data selected from each group to produce respective combination signals, means for comparing pairs of combination signals relating to corresponding regions of the first and second representations to form respective comparison signals indicative of the degree of similarity between each compared pair of combination signals, means for operating on the comparison signals to produce a correlation signal indicative of the extent to which said first and second representations resemble each other, means for effectively shifting the position of one of the representations relative to the other and for producing a respective correlation signal for each relative position adopted by said one representation in relation to the other, and means for selecting the correlation signal which indicates the closest resemblance of said first and second representations to one another.

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