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Method and apparatus of automatically identifying faults in a machine vision measuring system

  • US 6,323,776 B1
  • Filed: 12/21/1999
  • Issued: 11/27/2001
  • Est. Priority Date: 12/21/1999
  • Status: Expired due to Term
First Claim
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1. An apparatus for detecting a fault of a machine vision measuring system comprising:

  • a memory that stores an image formed by a camera of a target having a plurality of fiducials;

    a data processor coupled to the memory and having stored instructions which, when executed by the data processor, cause the data processor to carry out the steps of;

    creating and storing a list of values representing detected fiducials of the target based on the image;

    comparing the values representing the detected fiducials to a plurality of second values representing true fiducials of the target in a stored model of the target;

    based on the comparing step, selectively removing one or more of the detected fiducials from the list that fail to satisfy pre-determined criteria;

    generating a warning message using the machine vision measuring system when fewer than a first pre-determined number of detected fiducials remain in the list.

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