基于LWT-PCA算法的水印技术在视觉密码中的应用  

Application of watermarking technology based on LWT-PCA algorithm in visual cryptography

作　　者：于唤理 王洪君[1] 孟祥凤 YU Huanli;WANG Hongjun;MENG Xiangfeng(College of Mathematics and Computer,Jilin Normal University,Siping 136000,Jilin,China)

机构地区：[1]吉林师范大学数学与计算机学院,吉林四平136000

出　　处：《智能计算机与应用》2024年第11期182-187,共6页Intelligent Computer and Applications

摘　　要：本文提出了一种基于LWT-PCA的数字水印算法在像素不扩展(2,2)视觉密码方案中的应用。算法对载体图像进行一阶提升小波变换,在低频LL子带上用主成分分析提取出重要的主成分系数,再用像素不扩展(2,2)视觉密码方案将水印拆分成2个分享图像,将其中分享图像1嵌入到提取的主成分系数中,提取出来分享图像1与分享图像2可以恢复出水印。实验结果表明,本文水印算法能抵抗各类常见的攻击,同时保证了水印的隐蔽性。This paper proposes the application of a digital watermarking algorithm based on LWT-PCA in the pixel non-expansion(2,2)visual cipher scheme.The algorithm performs a first-order boosted wavelet transform on the carrier image,extracts the important principal component coefficients on the low-frequency LL sub-band by Principal Component Analysis,and then splits the watermark into two shared images by using the pixel non-expansion(2,2)visual password scheme.After that,the paper embeds the shared image 1 into the extracted principal component coefficients,and extracts the shared image 1 and the shared image 2 to recover the watermark.Experimental results show that the proposed watermarking algorithm can resist various common attacks and ensure the concealment of watermarks.

关 键 词：提升小波变换(LWT) 主成分分析(PCA) 视觉密码 像素不扩展 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]