关键词: 结构元素, 车牌定位, 自适应算法

Abstract: In view of disadvantage of selecting structure element of the traditional license plate locating algorithm based on mathematical morphology, that is, it selectes a definite shape and fixes size structure element based on experience or experiment results to globally process the license plate image, and the disadvantage would reduce the robustness and universal, a license plate location algorithm based on adaptive structure element is proposed. The algorithm makes the best of self-information of binary license plate image. The mean values of lines length, which are formed by calculating horizontal edge of characters, are as the structure elements, so the size of each structure element is adaptive to different images, in order to effectively extract the true license plate regions. The experimental results show that the algorithm has stronger adaptive ability, and the accurate rate of localization meets application requirements.

Key words: structure element, license plate location, adaptive algorithm