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GRADIENT IMAGE PROCESSING

  • US 20100118137A1
  • Filed: 11/07/2008
  • Published: 05/13/2010
  • Est. Priority Date: 11/07/2008
  • Status: Active Grant
First Claim
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1. A method of detecting defects in a metal part arising from processing of the metal part, the method comprising:

  • acquiring a thermal image of the metal part after processing the metal part;

    determining a difference image by comparing the thermal image to a reference image, the difference image being related to temperature differences between temperature data represented by the thermal image and reference temperature data represented by the reference image;

    determining a gradient image using the difference image, the gradient image representing temperature difference gradients within the difference image; and

    detecting defects in the metal part using the gradient difference image.

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