数字图像的边缘检测是图像分割、目标区域的识别、区域形状提取等图像分析领域十分重要的基础，图像理解和分析的第一步往往就是边缘检测，目前它以成为机器视觉研究领域最活跃的课题之一，在工程应用中占有十分重要的地位。本文向读者简单介绍一下这个技术，并给出了在Visual C++环境下实现的代码。-Digital images are the edge detection image segmentation, target area identification, regional shape the field of image analysis such as extraction of a very important foundation, image understanding and analysis is often the first step in edge detection, at present it is the machine vision to become the most active areas of research topics one of the engineering applications occupy a very important position. In this paper, a brief introduction to readers of this technology and give the Visual C++ implementation of the code environment.