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Method of extracting a region of a specific configuration and determining copy conditions

  • US 5,930,391 A
  • Filed: 05/01/1998
  • Issued: 07/27/1999
  • Est. Priority Date: 09/13/1995
  • Status: Expired due to Term
First Claim
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1. In the extraction of a specific region of an image, a method of extracting a specific region comprising the steps of:

  • (a) setting, in accordance with characteristics of the specific region, at least one search condition for searching for portions corresponding to an outer edge of the specific region on the basis of a predetermined image characteristic amount;

    (b) searching for portions assumed to correspond to the outer edge of the specific region, and setting one of the search portions as a reference point;

    (c) searching for a portion which satisfies said at least one search condition and which exists within a predetermined search range in the image, said search range being based on the reference point, and in a case in which a portion which satisfies said at least one search condition and exists within the predetermined search range is detected, setting the detected portion as a next reference point; and

    (d) extracting, as a line representing an outer edge of the specific region, a line which is formed by connecting a plurality of portions of the image in the order in which said portions were set as reference points.

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