Sun Wei, born in 1980. He received his Ph. D degrees in Instrument Science and Technology Depart- ment of Southeast University in 2010. He also received his B.S. and M. S. degrees from Henan University of Science and Technology in 2004 and 2007 respective- ly. His research interests include the machine vision, and the automobile active safety detection technology.To whom correspondence should be addressed. E-mail: sunweixinxiang@ tom. com