一种自适应可变容量的可逆水印算法  

Adaptive Variable-Payload Reversible Watermarking Algorithm

作　　者：王娟 朱月秀 WANG Juan;ZHU Yuexiu(School of Computer Science,Minnan Normal University,Zhangzhou,Fujian 363000,China;Key Laboratory of Data Science and Intelligence Application,Fujian Province University,Zhangzhou,Fujian 363000,China)

机构地区：[1]闽南师范大学计算机学院,福建漳州363000 [2]数据科学与智能应用福建省高等学校重点实验室,福建漳州363000

出　　处：《闽南师范大学学报（自然科学版）》2018年第1期22-29,共8页Journal of Minnan Normal University：Natural Science

基　　金：福建省教育厅项目(JA15302;JAT160307)

摘　　要：为了提高可逆水印的嵌入容量及水印图像质量,提出一种自适应可变容量的可逆水印算法.该算法对载体图像进行分块,每块整数变换后根据图像的特征生成可变容量可逆水印:平滑块8比特,嵌入在图像像素的低2位,纹理块12比特嵌入在图像像素的低3位.实验结果表明,与同类算法相比,该算法在保证水印图像质量的基础上提高了可逆水印的嵌入容量,所嵌的版权信息及原始载体图像均能无失真提取与恢复.To further improve the embedding capacity and the quality of watermarked image,a adaptive variable-payload reversible watermarking algorithm is proposed in this paper.The carrier image is divided into blocks,variable-payload reversible watermark is generated according to the features of each block which via integer transform.The embedding mode is:8 bits watermark is embedded in the two least bits of smooth-block pixels and 12 bits watermark is embedded in the three least bits of texture-block pixels.Compared with other similar algorithms,the experimental results show that the algorithm has improved reversible watermark embedding capacity on the basis of guarantee the quality of watermarked image,the embedded copyright information can be extracted and the original image can be recovery without distortion.

关 键 词：可逆水印 自适应 整数变换 可变容量 嵌入容量 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]