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FAST ROTATION ESTIMATION

  • US 20120206617A1
  • Filed: 02/15/2011
  • Published: 08/16/2012
  • Est. Priority Date: 02/15/2011
  • Status: Active Grant
First Claim
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1. Within an image acquisition device, a method of detecting rotation from matching corner regions of acquired images, comprising:

  • acquiring a sequence of image frames; and

    determining a measure of frame-to-frame rotation, including;

    performing a global XY alignment of a first frame and a second, following frame of said sequence of image frames;

    determining local XY alignments in at least two matching corner regions of the first and second frames after the global XY alignment; and

    based on the differences between said local XY alignments, determining a global rotation of the second frame relative to the first frame; and

    performing a further action based on the determined global rotation.

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