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Positional measurement of a feature within an image

  • US 8,718,403 B2
  • Filed: 10/23/2003
  • Issued: 05/06/2014
  • Est. Priority Date: 10/25/2002
  • Status: Active Grant
First Claim
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1. A method for determining coordinates of a feature comprising:

  • providing a first image including the feature, the first image comprising a plurality of pixels;

    determining a first estimate of coordinates of the feature to within a fraction of a pixel;

    translating the feature relative to the pixels by a pixel translation value, wherein the sum of the pixel fraction and pixel translation value is an integer value;

    determining a second estimate of coordinates of the translated feature to within a fraction of a pixel; and

    summing the pixel fractions of the first estimate with the second estimate to derive a refined estimate of coordinates.

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