Image processing method

  • US 7,650,015 B2
  • Filed: 02/20/2007
  • Issued: 01/19/2010
  • Est. Priority Date: 07/22/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for tracking a target in an input signal implemented using a system comprising an image processing system, the input signal comprising a succession of frames, each frame comprising a succession of pixels, the target comprising pixels in one or more of a plurality of classes in one or more of a plurality of domains, the process performed by said system comprising:

  • selecting a pixel of the target as a starting pixel;

    on a frame-by-frame basis;

    forming a tracking box around the starting pixel and for each pixel of the input signal in the tracking box forming a histogram of the pixels in the one or more of a plurality of classes in the one or more of a plurality of domains;

    successively increasing the size of the tracking box and for each pixel of the input signal, in each successive tracking box forming a histogram of the pixels in the one or more of a plurality of classes in the one or more of a plurality of domains;

    determining when the target is substantially within the tracking box;

    stopping the size increasing of said tracking box; and

    adjusting the center of the tracking box based upon the histograms.

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