A novel two-stage method is presented for the efficient determination of target center and scale,improving the adaptability for scale changes.Firstly,the proposed scheme downsamples the correesponding parts of current frame,and employs the mean shift algorithm with successive bandwidth trials to derive the center of target candidate.Secondly,by using the scaling and rotation invariance of log-polar transform,the changes of object scale and rotation are converted into transformation in orthogonal coordinate;...
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