Abstract:First of all,this paper analyzes the basic steps of dark channel prior algorithm, and then proposes a method to improve image quality under special scene image restoration algorithm. The algorithm works on special scene image through reversion operation firstly, and then lets improved dark channel prior algorithm use for inverting image to make the quality of the special image be improved on using the conclusion that an reversed special scene image has the similar features with a haze image. In this paper, we will optimize the parameters of improved dark channel prior algorithm and deal with the sky in the image area and the non-sky area in separate, which is very good visual effect and also reduces the complexity of the algorithm.