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SCALE SPACE NORMALIZATION TECHNIQUE FOR IMPROVED FEATURE DETECTION IN UNIFORM AND NON-UNIFORM ILLUMINATION CHANGES

  • US 20110170780A1
  • Filed: 01/07/2011
  • Published: 07/14/2011
  • Est. Priority Date: 01/08/2010
  • Status: Active Grant
First Claim
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1. A method operational in an image feature detection device, comprising:

  • generating a difference of scale space image by taking the difference between two different smoothened versions of an image;

    generating a normalized difference of scale space image by dividing the difference of scale space image by a third smoothened version of the image, where the third smoothened version of the image is as smooth or smoother than the smoothest of the two different smoothened versions of the image; and

    using the normalized difference of scale space image to detect one or more features for the image.

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