Abstract: By the conventional image restoration technique, it is hard to achieve a satisfactory restoration effect to the images shot in haze weather. To solve this problem, by analyzing the photo-generation principle of this kind of image in physics, a physically based restoration method based on scene point depth detection is proposed. Afterwards, a wavelet function is defined by a 3rd order B-spines as the smooth function, and the edge of the image that has been restored is detected through the wavelet transform. The experiment result shows that the method proposed in the paper is more efficient than that based on filtering for image restoration, and the edge detection result also shows the superiority of the restoration method proposed in the paper.