讨论曲线形状分析与三维表面识别方法，针对刑侦工作中立体足迹识别的要求，提出了三维表面的等值线特征提取，曲线形状的空间结构及自回归谱（AR谱）分析，以及基于曲线形状分析的模糊模式识别方法。实验表明该方法用于三维表面识别效果明显。

This article discusses analyzing curve shapeand distinguishing methods on 3D surface. Considering needs of recognizing 3D foot marks in detective work, this paper poses drawing features of equal value curves of three dimentional surface, the analysis for space structure and autoregresive spectrum of the curve shape,and a fuzzy distinguishing method on the base of the above analysis. It is proved by experiments that the method is very effective on recognizing 3D surface.