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Image detecting method, image detecting system, program, and recording medium for image detection

  • US 20020006223A1
  • Filed: 05/16/2001
  • Published: 01/17/2002
  • Est. Priority Date: 05/19/2000
  • Status: Active Grant
First Claim
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1. An image detecting method comprising the steps of:

  • a) searching for a pattern satisfying a predetermined commencement requirement by scanning an input image;

    b) using the pattern as a starting point, with referring to a dictionary storing therein distances between the center line and an edge of a detection target semicircle, determining for each of a predetermined number of main scan lines along a sub-scan direction whether or not a predetermined edge pattern occurs within a respective range of the distance of said dictionary; and

    c) determining a detection of the semicircle when the number of error main scan lines on which the predetermined edge pattern does not occur within the respective range of the distance of said dictionary is less than a predetermined threshold.

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