实用原则的基础上不仅可以提高汽车车牌上汉字、英文字母和 数字的识别率，而且适合我国目前交通汽车业的现状，因此具有很好的研究 和开发价值-Utility based on the principle of car license plate can not only improve on Chinese characters, English letters and numbers recognition rate, but also fit China' s current tra