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Image processing method and apparatus

  • US 6,415,053 B1
  • Filed: 04/20/1999
  • Issued: 07/02/2002
  • Est. Priority Date: 04/20/1998
  • Status: Expired due to Fees
First Claim
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1. An image processing method for subjecting digital image data of color image signals to specified image processing, comprising the steps of:

  • calculating gradients representing directions and intensities of a pixel of interest and its surrounding pixels from pixel values of said pixel of interest and its surrounding pixels of image composed of said color image signals that are to be subjected to image processing;

    storing the calculated gradients;

    calculating connectivity of said pixel of interest with its surrounding pixels from the directions of said stored gradients;

    calculating directivities of respective R, G and B of said pixel of interest by calculating gradients of respective R, G and B channels of said pixel of interest; and

    deciding whether said pixel of interest is an edge portion or not from said connectivity and said directivities of respective R, G and B to extract said edge portion.

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