本文对经典算法Canny算子和基于模糊理论的边缘提取方法进行理论分析、仿真实验和性能对比。最后对两种方法进行对比评价。图像边缘提取性能的评价标准主要包括主观和客观方法。-In this paper, the classical algorithm Canny operator and edge extraction method based on fuzzy theory theoretical analysis, simulation and performance comparison. Finally, comparative　uation of the two methods. Image Edge Extraction performance　uation criteria mainly include subjective and objective methods.