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Two dimensional image recording and reproducing scheme using similarity distribution

  • US 7,082,225 B2
  • Filed: 08/28/2002
  • Issued: 07/25/2006
  • Est. Priority Date: 08/28/2001
  • Status: Active Grant
First Claim
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1. A method for detecting a position of a prescribed pattern in an information recording image that contains the prescribed pattern, comprising the steps of:

  • (a) detecting a rough position of the prescribed pattern in the information recording image in units of pixel size; and

    (b) detecting a detailed position of the prescribed pattern in the information recording image in units less than the pixel size, according to the rough position detected by the step (a) and a center of gravity of a distribution of similarities between regions in the information recording image and a reference image of the prescribed pattern.

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