Car's license plate identification system based on image processing is one of the key technologies of intelligent
transportation system. In most cases, license plate numbers can be accurately recognized by the generic identification
systems while the image is clear. However, sometime the license plate are seriously blurred by some dunghill such as
mud or water smoke before camera lens, which is hard to be identified. In order to get higher recognition rate of blurred
license plate, an approach based on natural image matting is proposed in this paper.