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Region detecting method and region detecting apparatus

  • US 7,657,090 B2
  • Filed: 05/26/2004
  • Issued: 02/02/2010
  • Est. Priority Date: 05/26/2003
  • Status: Expired due to Fees
First Claim
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1. A region detecting method based on a method of deciding a threshold value, comprising:

  • an input step of an input interface section inputting a plurality of sample images and a targeted image and storing the plurality of sample images and the targeted image in a storing section;

    a first step of a processor obtaining extraction-region-identifying threshold data for identifying an extraction region for the plurality of sample images including a common extraction region but having average color values different from each other in accordance with an algorithm;

    said first step includinga threshold data group generating step of the processor initially generating a predetermined number of threshold data groups constituted by at least RGB threshold data for a first color-component region and RGB threshold data for a second color-component region adjacent to the first color-component region for characterizing the extraction region as the extraction-region-identifying threshold data for identifying the extraction region,an adaptability evaluating step of the processor evaluating an adaptability for the sample images of the generated threshold data groups,a gene processing step of the processor generating new threshold data groups by executing at least one of a crossing operation and a mutation operation and selecting the new threshold data groups in accordance with the adaptability evaluated in said adaptability evaluating step,a threshold data group supplying step of the processor generating additional threshold data groups to maintain a number of the threshold data groups equal to a number of the threshold data groups generated in said threshold data group generating step, anda generation alternating step of the processor repeating said gene processing step, said adaptability evaluating step and said threshold data group supplying step over set generations;

    a second step of the processor adaptively computing the extraction-region-identifying threshold data for identifying the extraction region for the targeted image in accordance with average color values of the targeted image and a relation between the thresholds and the average color values obtained in said first step;

    a third step of the processor detecting the extraction region in accordance with the threshold data computed in said second step; and

    an output step of the processor outputting the extraction region detected in said third step to an output interface section.

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