›› 2015, Vol. 28 ›› Issue (11): 33-.

• 论文 • 上一篇    下一篇

差值扩展算法嵌入容量的研究与改进

郭彦鹏,胡文龙   

  1. (上海理工大学 光电信息与计算机工程学院,上海 200093)
  • 出版日期:2015-11-15 发布日期:2015-12-15
  • 作者简介:郭彦鹏(1990—),男,硕士研究生。研究方向:图像信息隐藏,数字水印。E-mail:g_yanpeng@163.com。胡文龙(1988—),男,硕士研究生。研究方向:信号获取与处理。

Research on and Improvement of Capacity of DE Algorithm

GUO Yanpeng,HU Wenlong   

  1. (School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
  • Online:2015-11-15 Published:2015-12-15

摘要:

针对Tian提出的差值扩展可逆隐写算法(DE算法),以及该算法变形延伸算法存在的位置图比特流简单压缩方法导致隐写容量变小的问题,为了提高位置图压缩效率进而提高隐写容量,通过分析图像差值矩阵相关性对位置图比特流中连续0、1分布的影响,提出一种利用图像差值相关性来提高隐写容量的改进算法。实验结果表明,改进算法显著提高了隐写容量,且对位置图压缩效率约可到提高35%,PSNR平均提高1 dB。

关键词: 差值扩展, 隐写容量, 位置图, 压缩

Abstract:

An improved algorithm based on the reversible difference expansion(DE) algorithm put forward by Tian is proposed by analyzing the ways that how the host image pixels' differences correlation influence the continuation of 0,1 of location map.The proposed algorithm takes advantage of the pixels' differences correlation to improve the efficiency of location-map compressing and to solve capacity limits caused by crude compression of location map.The experiment results show that the proposed algorithm can notably improve capacity with a improved location-map compression efficiency by ~ 35% and a PSNR by 1 dB on average.

Key words: difference expansion;steganography capacity;location map;compression

中图分类号: 

  • TP391