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Image-feature detection

  • US 9,158,991 B2
  • Filed: 02/22/2013
  • Issued: 10/13/2015
  • Est. Priority Date: 02/22/2012
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • analyzer circuitry configured to,extract a stripe from a digital image, the stripe including a plurality of image blocks,transform each of the image blocks in the stripe from a pixel domain into the frequency domain,filter each of the transformed image blocks, andanalyze each filtered transformed image block to determine if each transformed image block likely includes one or more keypoints;

    scale filter those filtered transformed image blocks that are determined to likely include one or more keypoints,transform the scale filtered transformed image blocks back into the pixel domain;

    analyze the transformed scale filtered transformed image blocks to localize one or more keypoints, anddetection circuitry configured to identify one or more image features based on the one or more localized keypoints.

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