基于图像处理的复杂条件下手机二维码识别  

Recognition of two dimensional barcode for mobile phone based on image processing

作　　者：黄宏博[1] 穆志纯[2] 

机构地区：[1]北京信息科技大学计算中心,北京100192 [2]北京科技大学信息工程学院,北京100083

出　　处：《北京信息科技大学学报（自然科学版）》2011年第5期40-44,共5页Journal of Beijing Information Science and Technology University

基　　金：北京市教育委员会科技发展计划面上项目(KM200910772020);北京市属高等学校人才强教计划资助项目(PHR201108261)

摘　　要：针对手机二维码在光线不均衡、拍摄条码发生几何畸变等复杂条件下的识别问题,以QR码为例,提出利用透视投影变换对拍摄图像进行几何畸变校正,使用多阈值方法进行二值化处理。依据位置探测图形的特点对条码图像进行定位和裁切,设计了基于采样网格的窗口采样方法,以提高信息采样准确率,给出了QR条码的纠错译码步骤。实验结果表明,该方法可以有效识读光线不均和几何畸变的手机二维码。To solve the problem of two-dimensional barcode recognition under complicated conditions such as imbalanced illumination and geometric distortion,projection transformation is used to correct the image distortion,and a method of multi-threshold image binarization is proposed.The barcode is located and cropped according to the features of position detect pattern.A new window sampling method is designed based on the sampling grid built on the barcode symbol to improve the accuracy of sampling information.Then the error correcting and decoding step is given.Experiments show that the methods are effective and robust.

关 键 词：图像处理 QR码 手机二维码 投影变换 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]