一种基于二维码和Kent映射以及DCT的数字水印技术

Research on the digital watermarking technology using QR Code,Kent mapping and DCT

介绍了基于DCT的数字图像水印技术,简要描述数字水印的评估标准和分类。提出了一种数字水印算法,该算法在水印信息预处理阶段通过二维码将文本信息图形化处理,之后采用具有更好遍历性的Kent映射算法对水印二维码图像进行混沌处理以保证更好的全局收敛性,再根据DCT的原理,按照纹理复杂度的阈值嵌入水印数据。最后对于该算法的特性做了总结。

This paper introduces the DCT based on digital watermarking technology,briefly describes the evaluation standard and classification of digital watermark.A digital watermarking algorithm is proposed,in which QR code is used to transform the text information into image in the watermark information preprocessing stage,and Kent mapping algorithm,which has better ergodicity,is used for chaotic processing and encrypting the QR code image to ensure the global convergence of the algorithm,then according to the principle of DCT and the threshold of texture complexity,watermarking data is embedded into the carrier picture.Finally,the characteristics of the algorithm are summarized.