Abstract: To adaptively search the optimum dynamic threshold and update the template in image sequence, a target tracking method is developed. The correlation-based method consists of adaptive threshold region matching, layered-weighting in the matching region, and updating the templete adaptively. Experiment shows that the easier matching and higher matching accuracy are reached due to the smaller target matching region and more distinguished matching center obtained in the method. A region layer-based search algorithm is also presented.The fast matching speed with higher accuracy and the stronger noise resistant ability are obtained by the method in the different light intensity backgrounds.

Key words: information processing technology, adaptive threshold, layered weighting, templete adaptive update, layered fast search