增强S曲线函数，文章CONTRAST ENHANCEMENT FOR ENLARGED IMAGES BASED ON EDGE SHARPENING，Qing Wang, Rabab Ward and Jiancheng Zou 中的两个增强模板，对边缘点和平滑点采取不同的增强方法，达到边缘锐化的目的。-Enhance the S curve function, the article CONTRAST ENHANCEMENT FOR ENLARGED IMAGES BASED ON EDGE SHARPENING, Qing Wang, Rabab Ward and Jiancheng Zou 。 two enhance template of EDGE points and smooth point to a different ENHANCEMENT method, reach the purpose of sharpen edges.