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Formation testing with digital image analysis

  • US 5,113,454 A
  • Filed: 08/19/1988
  • Issued: 05/12/1992
  • Est. Priority Date: 08/19/1988
  • Status: Expired due to Fees
First Claim
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1. A method for determining the uniformity of a medium comprising the steps of:

  • illuminating said medium by transmitting light through the medium;

    generating digital data corresponding to the intensity level of data points in a two dimensional array of data points on said illuminated medium;

    dividing said digital data into a plurality of relatively large two dimensional windows;

    subdividing each of said large windows into a plurality of smaller windows;

    determining the average intensity of the data points in at least one large window;

    determining the average intensity of he data points in at least one of the smaller windows within the associated large window;

    determining the difference in the average intensity level between at least one smaller window and its associated large window; and

    generating an index representing the uniformity of said data as a function of the difference in intensity levels between data points in said at least one of the smaller windows and its associated large window.

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