互联网QR码图片监测系统的设计与实现

Design and Implementation of Monitoring System for Internet QR Code Pictures

二维码应用日趋广泛,已经渗透到社会生活的方方面面,成为连接互联网线上和线下的重要纽带。二维码给生活带来便利的同时也被不法分子用来传播有害信息,给国家的网络信息安全带来新的挑战。文章针对互联网中应用最广泛的二维码——QR码(Quick Response Code),深入研究了二维码图形定位、二维码图形矫正、二维码图形解码等关键技术,设计和实现了面向互联网QR码图片的监测系统。实验结果证明,在5000张包含有QR码的互联网图片数据集上,本系统检测QR码的准确率达到96%,召回率90%,检测速度达到每秒30张图片,满足实时应用的需求。

Two-dimensional code has become increasingly widespread and penetrated into every aspect of social life. It is one of the most important links between online and offline now, but the security issues cannot be ignored. Two-dimensional code has been used to spread harmful information, which has brought a new challenge to network and information security. Aiming at the most widely used tow-dimensional code -- Quick Response （QR） code, this paper studies key technologies such as QR code positioning, QR code graphic distortion correction, QR code decoding etc, and introduces the design and implement of a practical real-time monitoring system. The experimental results show that the recognition accuracy is 96%, the recall is 90%, and the recognition speed is 30 pictures per second on the test data set of 5000 pictures which contain QR code, basically meeting the need of reaL-time application.