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Sensing a dimensional change in a surface

  • US 20060170934A1
  • Filed: 01/28/2005
  • Published: 08/03/2006
  • Est. Priority Date: 01/28/2005
  • Status: Active Grant
First Claim
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1. A method for determining a dimensional change in a surface of an object, comprising:

  • at a first time, acquiring a first image of said surface at a first spatial window thereon having a first known position relative to a frame of reference;

    at a second time, acquiring a second image of said surface at a second spatial window thereon having a second known position relative to said frame of reference;

    processing said first image and said second image according to an image displacement sensing algorithm to determine a relative translation of a first point on said surface between said first and second times; and

    using said relative translation of said first point, said first known position, and said second known position to determine the dimensional change in said surface between said first and second times.

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