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Image processing method and apparatus, and image processing program

  • US 7,447,377 B2
  • Filed: 10/12/2004
  • Issued: 11/04/2008
  • Est. Priority Date: 10/10/2003
  • Status: Expired due to Fees
First Claim
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1. An image processing method comprising:

  • separating image data into plural frequency components that are different from each other;

    calculating a first evaluation value for an edge degree judgment by applying direction-specific templates to remainder frequency components other than a low-frequency component among said plural frequency components obtained by said separating step;

    extracting an edge portion using said first evaluation value;

    performing image enhancement processing separately for each of said plural frequency components based on a result of said extracting step of said edge portion; and

    synthesizing said plural frequency components resulting from said performing step of said image enhancement processing.

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