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Apparatus for automatically inspecting objects and identifying or recognizing known and unknown portions thereof, including defects and the like, and method

  • US 4,893,346 A
  • Filed: 09/02/1987
  • Issued: 01/09/1990
  • Est. Priority Date: 03/14/1985
  • Status: Expired due to Fees
First Claim
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1. A method of inspection of circuit board conductive shapes wherein digital signal information is stored representing desired shapes to be monitored in future board inspections, the method comprising, originally storing digital signal information representing images of desired predetermined object shapes to be learned;

  • predetermining at least one of acceptable size or dimension variations in such object shapes;

    modifying the stored digital signal information to create a set of fictitious images of said object shapes to be learned that incorporates the acceptable variations therein;

    storing the modified digital signal information representing said fictitious images; and

    , during circuit board inspections, ignoring said acceptable variations as possible defects by responding to recognition of the acceptable variations in the said fictitious stored images.

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