主要回顾了图象边缘检测技术的发展历程,讨论了一些典型的边缘检测算法的特点,分析了他们的机理和优劣,并对边缘检测算法的研究方向进行展望-Edge detection is an indispensable step before image analysis and recog nit ion, and is an important technology in the image preprocessing procedure. In this paper w e chiefly review