For images with color, it seems obvious that an additional term must be added to consider the difference between the color of the background and the color of the target. In other words, if at present the contrast between the target and the background

自己写的针对低对比度图像的增强方法，在CIELAB空间处理，可用于处理沙尘、水下、雾天等图像.简单但有效-Enhance the low contrast image, such as dust/sand, underwater, haze/fog images. Performed in CIELAB color space, with contrast stretch, sharpen and color correction. Sample but effective.