边缘检测是数字图像处理中的重要内容，它是底层视觉处理中最重要的环节之一也是实现基于边界的图像分割的基础。本文对图像的边缘检测的各种算法和算子做了总结和分析，通过运用MATLAB对常见的边缘检测算子进行仿真。-Edge detection in digital image processing is an important part of it is the underlying visual processing is one of the most important part of the boundary-based image segmentation basis. In this paper, a variety of edge detection algorithms and operators to do a summary and analysis, through the use of MATLAB to common edge detection simulation.