Title: A curve fitting method based on the direction tracing Author(s): Gu H (Gu Hui), Chen GY (Chen Guangyi), Lu YY (Lu Yaya) Source: CHINESE JOURNAL OF ELECTRONICS 15 (4A): 895-898 OCT 2006 Document Type: Article Language: English 拜求. 请发送至Lee_yueming@yahoo.com.cn,不胜感激.谢谢