Research on the license plate position algorithm in complicated scenes

The license plate location plays an important role in the License Plate Recognition (LPR). According to the vertical projection and the morphological operations, this paper proposes a kind of locating method based on binary image in order to obtain accurate location of vehicle plate quickly under complex background. First, this method carries out preprocessing such as the color image grays processing, the binarization, filtering and noise abatement. Then the projection approach based on texture feature of license plate character is adopted to realize the rough location. On this basis, the up-down and left-right boundary of the car license are all examined accurately in accordance with the projection and the morphological operations. Experimental results show that this method is excellent in accuracy with a rapid speed and is great in the robustness.