基于离散小波变换的QR二维条码防伪技术-计算机工程.PDFVIP

下载本文档

2
0
约1.23万字
约 4页
2018-10-12 发布于天津
举报
版权申诉

基于离散小波变换的QR二维条码防伪技术-计算机工程.PDF

1、本文档共4页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
5、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
6、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
7、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
8、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

基于离散小波变换的QR二维条码防伪技术-计算机工程

39 12 2013 12 Vol.39 No. 12 Computer Engineering December 20 13 ·· 2013 A TP391 QR ( 361024) (QR) QR Rand QR QR QR QR 2D Barcode Anti-counterfeiting Technique Based on Discrete Wavelet Transform XIE Rong-sheng, ZHAO Huan-xi, WU Ke-shou (Department of Computer Science and Technology, Xiamen University of Technology, Xiamen 361024, China) Abstract The Quick Response(QR) barcode anti-counterfeiting technique based on digital watermarking provides low watermarking capacity, and its anti-counterfeiting performance is poor. To solve the problem, Rand-graying method and background-image-graying method are proposed for QR binary images to increase watermarking capacity. The graying extent for QR binary image is determined by the graying threshold which can be selected according to specific application. Based on the graying methods, the anti-counterfeiting QR 2D barcode watermarking scheme based on Discrete Wavelet Transform(DWT) is designed. In the proposed scheme, watermarks embedding as well as watermarking detection are made by a quantization function. In addition, the positions for watermarking are determined by 2D chaos sequence generated from well designed chaos keys. Experimental result shows that the proposed watermarking scheme for QR 2D barcode improves anti-counterfeiting performance without loss of any bar code information. Key words digital watermarking; anti-counterfeiting; Quick Response(QR) code; binary image; Discrete Wavelet Transform(DWT); 2D barcode DOI: 10.3969/j.issn.1000-3428.2013.12.027 1