基于数码设备的二代身份证号码识别系统

摘要

This paper studies second-generation ID number recognition technology based on digital devices .For the preprocess-ing, a method based on Sobel operator template is provided to judge ID image vertical shooting or down shooting .For the charac-ters segmentation , an improved vertical projection method based on the Shenjun binary edge image is provided , which solves the segmentation of adhesion character effectively .For the characters recognition , the method of the blur grid eight-direction gradient feature combined with K-nearest neighbor classifier is used for classification .After many experiments , the results show that this system can accurately locate and recognize ID number for its high recognition accuracy and it is of general versatility .%研究基于数码设备（如手机、Pad等）的第二代身份证号码识别技术。对于预处理，提出基于Sobel算子边缘检测的身份证图像竖拍或倒拍的判断方法；对于字符分割，基于沈俊边缘检测的边缘二值图像，提出改进的垂直投影法，有效地解决了粘连体字符的切分；对于字符识别，提取模糊网格八方向梯度特征，采用K近邻分类器的方法进行分类识别。实验结果表明，本系统能准确定位和识别二代身份证号码，具有较高的识别准确率，具有一般通用性。