本文介绍了图像处理中的锐化技术，介绍了多种方法，包括边缘检测、一阶微分、二阶微分等。

图像的锐化技术是图像处理中必不可少的部分，学会如何锐化图像将使我们的图像处理软件设计更加完美。-This article describes a sharpening of the image processing technology, introduced a variety of methods, including edge detection, first derivative, second derivative and so on. Image sharpening technology is an essential part of image processing, to learn how to sharpen the image processing software will allow us to design more perfect.