首先使用拉普拉斯变换突出图像中的小细节，然后用梯度法突出其边缘。将变换图像与原图叠加，得到混合增强后的图像；最后对图像进行灰度变换（幂次变换）-Laplace transform to highlight the first to use images of small details, and then use the gradient method to highlight its edge. Will transform the image with the image overlay,