实现了对目标图像的梯度锐化功能，用到的算法有点复杂，操作时：打开图像-点击左视图-点击显示原图按钮-点击右视图-点击菜单栏中所要功能键-To achieve the target image gradient sharpening function, the algorithm is somewhat complicated to use, operation: open the image- click the left view- Click Show full size button- c