Patent ID: 7650015

Claim:
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.