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It summarized the characteristics of variable contour moving targets, and applied it to detect operating hands’ position on steering wheel. It raised a means by automaticly detecting the position of steering wheel firstly, and after that detecting the operating hands. For gathering the operating hands’ positions, this paper used AdaBoost on Haar to detect preliminarily and Real-AdaBoost on HOG to detect precisely. It fitted ellipse using SVD based on mass center coordinates of operating hands to simulate steering wheel and detected the operating hands quickly and accurately. Algorithm not only ensures the real-time and accuracy of the original one, but improves flexibility.