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In-plane rotation invariant object detection in digitized images

  • US 7,274,832 B2
  • Filed: 11/13/2003
  • Issued: 09/25/2007
  • Est. Priority Date: 11/13/2003
  • Status: Expired due to Fees
First Claim
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1. A method for locating a regularly configured object within a digital image, said method comprising the steps of:

  • computing a plurality of primary rotated integral images of said digital image, each said primary rotated integral image having a different in-plane rotation;

    deriving from each of said primary rotated integral images a set of secondary rotated integral images having further in-plane rotations relative to the respective said primary rotated integral image;

    defining a window within said digital image and corresponding windows of said rotated integral images;

    extracting the values of convolution sums of a predetermined set of feature boxes within said window, in each of said rotated integral images;

    reducing dimensionality of said convolution sums to provide a set of reduced sums;

    applying a probability model to said reduced sums to provide a best estimated derotated image of said window.

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