Automatic license plate location is the most important step in license plate recognition system. According to the characteristics of the li-cense plate area, proposes a simple and fast method for the coarse location of the license plate. First of all, the color image of the license plate is gray, and the automatic threshold method is used to carry on binarization. The method can be used for different color images. Then gradient operator is used to detect the edge of the binary image. And then the gray-hopping frequency is used to locate the license plate area. Experiments on license plate images show that the proposed method is simple, practical, and fast.
NETL
NSTL
万方数据
维普
