Image defogging algorithm of single color image based on wavelet transform and histogram equalization

Because of light scattered by the suspended particles in the atmosphere, photographs taken in the foggy day look gray and lack of visibility. In order to unveil the clear image’s structures and colors, we propose a image defogging algorithm of single color image based on wavelet transform and histogram equalization. Firstly, using histogram equalization to enhancement image, then to nonlinear enhancement the approximate coefficients of wavelet transform, and to distribution more uniform gray of image. A large number of experimental results show that the algorithm can enhance the image contrast and get high definition images, and outperforms in visual quality and effectively preserves texture and detail information of original images.