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Method for automatic optical inspection

  • US 4,570,180 A
  • Filed: 05/26/1983
  • Issued: 02/11/1986
  • Est. Priority Date: 05/28/1982
  • Status: Expired due to Fees
First Claim
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1. A method for the automatic optical inspection of a digitized substantially two-dimensional image, said image having edge regions and non-edge regions and being stored in an image storage as a plurality of grey values representing the lightness or darkness of one of a plurality of picture elements constituting said image, said edge regions being transitions from light regions to dark regions comprising the steps of:

  • scanning all edge regions of said image;

    marking said scanned edge regions in said image storage such that all non-marked non-edge regions should contain only grey values corresponding to a light region or a dark region; and

    sequentially addressing all non-marked non-edge regions of said image storage to determine whether grey values other than those corresponding to light or dark regions exist.

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