车牌字符识别是字符识别的重要组成部分。车牌字符识别的最终目的就是将图像中的车牌字符转化成文本字符，车牌字符的识别属于印刷体识别范畴。
字符识别的基本思想是匹配判别。抽取待识别字符特征按照字符识别的原理和预先存储在计算机中的标准字符模式表达形式的集合逐一进行匹配，找出最接近输入字符模式的表达形式，该表达形式对应的字就是识别结果。(License plate character recognition is an important part of character recognition. The final purpose of license plate character recognition is to change the characters of the license plate into text characters, and the recognition of the characters of the license plate belongs to the field of print identification.
The basic idea of character recognition is matching and discrimination. The character to be recognized in accordance with the principle of feature extraction and character recognition of the pre stored standard character pattern in the computer expression set one by one, and find the closest input expression form of the character pattern, the expression of the corresponding word recognition results.)