实现了对目标图像的微分运算，如：横向微分、纵向微分、一次微分、二次微分等，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 differential operation of the target image, such as: horizontal differentiation, vertical differential, first derivative, second derivative, etc., operation