基于图像边缘检测的证书防伪技术  

Certification protection technology using edge detection technology for authentication

作　　者：毛晨[1] 张定会[1] 

机构地区：[1]上海理工大学光电信息与计算机技术学院,上海200093

出　　处：《信息技术》2015年第11期113-115,120,共4页Information Technology

摘　　要：证书防伪是人们越来越关注的社会问题,盗版作假日益影响着大家的生活。文中提出了一种基于可信第三方的非嵌入式认证水印的证书防伪技术方案。该方案通过Canny边缘检测技术对经过DWT变换过的图像进行边缘检测,来获取图像的边缘属性,并利用该属性生成含有水印信息的认证码。传统水印算法需要修改载体图像内容,会损害图像数据,但非嵌入式认证水印则避免了对图像数据的破坏,保证了载体图像的质量。无需提取水印,与其他证书防伪技术相比更方便,实验结果表明该方案具有可行性和有效性。This paper proposes a non-embedded watermarking based on a trusted third party. The algorithm first calculates the edge information of the images which are transformed by DWT with Canny and then computes authentication codes with the edge information. The non-embedded watermarking technology avoids the damage of the original image, which is caused by traditional watermarking. The approach does not need abstract watermarking. The experiments show that, compared with other certification protection technology, the approach is more convenient and effective.

关 键 词：数字水印 DWT 证书防伪 CANNY算子 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]