边缘提取以及边缘增强是不少图像处理软件都具有的基本功能，它的增强效果很明显，在用于 识别的应用中，图像边缘也是非常重要的特征之一。-Edge detection and edge enhancement are the basic functions of a number of image processing software, it enhanced the effect is very obvious, and used for Recognition applications,