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Descriptors adjustment when using steerable pyramid to extract features for content based search

  • US 6,674,915 B1
  • Filed: 11/15/1999
  • Issued: 01/06/2004
  • Est. Priority Date: 10/07/1999
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • getting a Laplacian image from corresponding Gaussian images in a steerable pyramid;

    verifying the Laplacian image for negative value;

    adjusting the Laplacian image to eliminate the negative value;

    applying a steerable filter to the adjusted Laplacian image to generate orientation data and energy data;

    removing resulting adjustment;

    extracting a plurality of descriptors from the orientation data and the energy data; and

    combining the plurality of descriptors into an image descriptor to be used for image processing.

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