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Method for extracting objective image

  • US 7,103,209 B1
  • Filed: 11/20/2000
  • Issued: 09/05/2006
  • Est. Priority Date: 11/29/1999
  • Status: Expired due to Fees
First Claim
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1. A noted image extraction method in image processing technology of an image recognized as matrix-shaped pixel information, the method comprising:

  • obtaining a difference information between an image detection signal of the noted portion and image detection signals for surrounding scanned positions as an image signal for each scanned position, wherein difference information for differences between image detection signal values for each scanned position and surrounding scanned positions is obtained by subtracting image detection signal values for surrounding scanned positions from image detection signal values for each scanned position; and

    adopting a smallest value of greater than or equal to zero among the set of values resulting from the calculation of differences as the value for recognizing a pin point hole in an isolated area and adopting a largest value of greater than or equal to zero among the set of values resulting from the calculation of differences as the value for recognizing a pattern contour of a continuous pattern area.

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