图像的边缘是图像的最基本特征。边缘蕴含了丰富的信息，能描绘出目标物体，令观察者一目了然，是人们最感兴趣的图像特征之一。与灰度图像进行比较，彩色图像可以提供更为丰富的信息，彩色图像的边缘检测也日益受到人们的重视。本文是在灰度图像的检测基础上，利用经典的灰度图像检测算法对彩色图像各个分量进行边缘检测，再将结果进行合并，从而得到彩色图像的边缘检测结果。-The edge of the image is the most basic feature of the image. Edge contains a wealth of information, which can depict the target object, the observer be clear at a glance, is one of the most interested in image characteristics. Compared with gray image, color images can provide more abundant information, color image edge detection are increasingly brought to the attention of the people. This article is based on the gray image detection, using the classic gray image of every component detection algorithm for color image edge detection, then the result to merge, and color image edge detection result is obtained.