基金Supported by the National Natural Science Foundation of china under Grant Nos.6053303060673091+4 种基金60772071(国家自然科学基金)the National High-Tech Research alld Development Plan of China under Grant Nos.2006AA01Z1222007AA01Z163(国家高技术研究发展计划(863))the 100 Talents Program of the Chinese Academy of Sciences(中国科学院"百人计划")the ISVISION Technology Co.Ltd.(上海银晨智能识别科技有限公司)