计算机应用 ›› 2013, Vol. 33 ›› Issue (08): 2232-2235.

• 信息安全 • 上一篇    下一篇

基于小波域可逆信息隐藏的免疫数字水印算法

肖迪1,祝心怿2   

  1. 1. 重庆大学 计算机学院, 重庆 400044
    2. 重庆大学 计算机学院,重庆 400044
  • 收稿日期:2013-03-11 修回日期:2013-04-19 出版日期:2013-08-01 发布日期:2013-09-11
  • 通讯作者: 肖迪
  • 作者简介:肖迪(1975-),男,重庆人,教授,博士生导师,博士,CCF会员,主要研究方向:多媒体内容安全;
    祝心怿(1989-),男,安徽池州人,硕士研究生,主要研究方向:可逆水印。
  • 基金资助:

    浙江省青年科学基金资助项目;重庆市杰出青年科学基金资助项目

Immunity digital watermarking algorithm based on reversible information hiding in wavelet domain

XIAO Di,ZHU Xinyi   

  1. College of Computer Science, Chongqing University, Chongqing 400044, China
  • Received:2013-03-11 Revised:2013-04-19 Online:2013-09-11 Published:2013-08-01
  • Contact: XIAO Di

摘要: 提出一种小波域上的免疫数字水印算法框架下的新颖可逆水印算法,旨在解决现有的免疫水印不能准确恢复原始图像的问题。算法可以有较大的容量并且可以精确地恢复原始图像。使用可逆水印算法中的直方图平移技术嵌入恢复向量,达到精确恢复原始图像的目的。算法通过小波变换时图像的分块大小、直方图平移的“峰值—零值”对和嵌入轮数三个参数来计算控制因子从而控制嵌入深度,最终可以得到和原始图像保持有较大的失真但又可以获知主要信息的发布图像。在嵌入过程中采用置乱以及加密技术,使得入侵者在没有得到授权文件的情况下无法强行恢复出原始图像。通过实验验证了该算法不仅可以得到和原始图像相差较大的发布图像,并且在得到安全认可的情况下又可以完整地恢复出原始图像。

关键词: 免疫水印, 可逆隐藏, 小波变换, 控制因子, 直方图平移, 授权文件

Abstract: To overcome the drawback of the existing immunity watermarking algorithm that the original image cannot be recovered exactly, a new reversible watermarking algorithm in wavelet domain based on immune watermarking framework was proposed. The algorithm has large embedding capacity and can recover the original image exactly. Meanwhile, the algorithm used histogram shifting method of reversible watermarking to embed recovery vector for recovering the original image precisely. By using the block size in the wavelet transform, the amount of the peak-zero point pair and the round amount in the histogram shifting, 〖JP2〗the control factor in the algorithm could be selected to decide the embedding depth. Then the algorithm could generate publishing image which has large distortion but also kept the main information of the original image. The scrambling and encryption methods were used in the algorithm so that the invaders could not recover the original image correctly by brute-force method without authorized file. The experimental results show that the algorithm can not only obtain the publishing image which has big differences with the original one, but also can recover the exact image when security permission is released.

中图分类号: