Research on localization method of vehicle license plate based on wavelet analysis

The License plate automatic recognition has been extensive applied in the intellectual traffic system and public transit security system. In this paper, a kind of location method based on the specific texture character of license plate is presented, using wavelet analysis for License Plate location. Then we do one-dimensional scale decomposition to the license plate image after coarse positioning through the wavelet, extracting the horizontal and vertical details of the license plate images, and binarization of the license plate image. Then we project the horizontal and vertical details of the images in horizontal and vertical direction respectively, finally we can find the specific location of license plates through the projection drawing. We have carried out a series of experiments under different conditions, the experiment results show that the location method presented in this paper is effect and successful.