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Range detecting method and apparatus

  • US 4,189,232 A
  • Filed: 01/05/1978
  • Issued: 02/19/1980
  • Est. Priority Date: 01/06/1977
  • Status: Expired due to Term
First Claim
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1. A method of detecting a range of an object comprising the steps of:

  • (a) deriving first and second images of said object along different sight lines;

    (b) electrically sensing said first and second images to produce an electrical analog signal for each image element of said first and second images;

    (c) quantizing said electrical analog signal to produce quantized data for each image element of the first and second images;

    (d) storing the quantized data on N successive elements of the first image and successively storing, on one set-by-set basis, the quantized data on each of a plurality of different sets of N successive elements of the second image;

    (e) comparing the stored quantized data on said set of the N successive elements of the second image with the stored quantized data on the N successive elements of the first image at every time the quantized data on a set of the N successive elements of the second image are stored;

    (f) detecting, through said comparison process, a set of the N successive elements of the second image which can be regarded as being substantially identical with the N successive elements of the first image; and

    (g) determining the range of the object on the basis of a location, within the second image, of said set of the N successive elements of the second image which has been regarded as being substantially identical with the N successive elements of the first image through said detection process.

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