应用科学学报 ›› 2018, Vol. 36 ›› Issue (4): 611-627.doi: 10.3969/j.issn.0255-8297.2018.04.005

• 信号与信息处理 • 上一篇    下一篇

大容量的密文域图像可逆信息隐藏算法

何志红, 秦川, 周青   

  1. 上海理工大学 光电信息与计算机工程学院, 上海 200093
  • 收稿日期:2017-05-22 修回日期:2017-09-30 出版日期:2018-07-31 发布日期:2018-07-31
  • 通信作者: 秦川,副教授,研究方向:数字图像处理、多媒体信息安全,E-mail:qin@usst.edu.cn E-mail:qin@usst.edu.cn
  • 基金资助:

    国家自然科学基金(No.61672354);上海智能家居大规模物联共性技术工程中心项目基金(No.GCZX14014);沪江基金(No.C14001,No.C14002)资助

High-Capacity Reversible Data Hiding for Encrypted Images

HE Zhi-hong, QIN Chuan, ZHOU qing   

  1. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2017-05-22 Revised:2017-09-30 Online:2018-07-31 Published:2018-07-31

摘要:

提出了一种新的用于加密图像的可逆信息隐藏算法.使用同一密钥对原始图像中每个不重叠分块中的像素进行加密,在保证原始图像内容安全的同时,利用块内相邻像素相关性特征和游程编码在加密图像中嵌入秘密信息.对于嵌入信息后的加密图像可直接用加密密钥解密,得到与原始图像视觉上相似的解密图像;也可以通过嵌入密钥正确地提取嵌入信息;在拥有这两个密钥的条件下,既可以正确地提取嵌入信息,又可以完全无误地恢复原始图像.实验结果表明:与已有方法相比,该方法不仅提高了加密图像的信息嵌入量,而且实现了原始图像的可逆恢复.

关键词: 图像加密, 嵌入量, 可逆信息隐藏, 图像恢复

Abstract:

In this paper, we propose a novel scheme of reversible data hiding in encrypted image. By using the same encryption key to encrypt the pixels in each non-overlapping block of original image, the contents of original image can be effectively masked by the content owner. The data-hider can realize data embedding in the encrypted image by exploiting the continuity characteristic of the pixels in each encrypted block and using run-length coding. After receiving the encrypted image containing extra data, with the encryption key, the receiver can obtain a directly-decrypted image which is similar to the original image; with the data-hiding key, the receiver can extract the embedded data correctly; with both encryption and data-hiding keys, the receiver can extract extra data and recover original image. Experimental results demonstrate that the proposed scheme can not only increase the hiding capacity in encrypted image, but also recover the original image without error.

Key words: image recovery, hiding capacity, image encryption, reversible data hiding

中图分类号: