图象锐化的目的是使模糊地图象变得更加清晰起来。 图象的模糊实质就是图象平均和积分运算造成的，因此可以对图象进行逆运算如微分运算来-Image sharpening purpose is to make the image even more vaguely clear. The image is blurred image in real average integral operation result, the image can be performed as the invers