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Image detection system

  • US 6,002,800 A
  • Filed: 05/16/1996
  • Issued: 12/14/1999
  • Est. Priority Date: 05/22/1995
  • Status: Expired due to Term
First Claim
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1. Apparatus for the detection of an image in an input pixel stream, said apparatus comprising:

  • (i) image input means for receiving said input pixel stream;

    (ii) cell converter means for forming cell data portions formed from regions of a corresponding image of said input pixel stream;

    (iii) template storage means for storing at least one template, said template comprising a multiplicity of cell data entries derived from the desired image to be detected, wherein each cell data entry constitutes a range of values, said range of values being derived from maximum and minimum data entry values for a particular corresponding portion of said desired image when said particular corresponding portion of said desired image is subjected to a predetermined amount of rotation, scaling and translation or any combination thereof; and

    (iv) comparator means for comparing said cell data portions of said cell converter means with said multiplicity of cell data entries to derive a template detection signal when at least an adjacent pair of said cell data portions match with a corresponding pair of said cell data entries for an optimal rotation position of said adjacent pair of cell data portions, and wherein said comparator means simultaneously compares a column of said cell data portions with said cell data entries of said template to determine if any column of said template matches with said column of cell data portions.

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