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Method and system for monitoring and controlling workpieces

  • US 20030035577A1
  • Filed: 08/14/2001
  • Published: 02/20/2003
  • Est. Priority Date: 08/14/2001
  • Status: Active Grant
First Claim
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1. A method for monitoring the delivery of workpieces to a position comprising the steps of:

  • storing a digital reference image of the position prior to the delivery of workpieces;

    storing a digital operating image of the position during delivery of workpieces;

    performing image arithmetic on the reference image and the operating image to produce a digital evaluation image comprised of a plurality of pixels;

    establishing a threshold image condition for the evaluation image that correlates to the existence of an operating condition relevant to the control of the delivery of workpieces;

    examining the pixels in the evaluation image to determine whether the threshold image condition is met.

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