• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2016, Vol. 38 ›› Issue (03): 528-533.

• 论文 • 上一篇    下一篇

基于差值直方图的简单高效可逆信息隐藏方法

张铠   

  1. (天津财经大学理工学院,天津 300222)
  • 收稿日期:2015-08-19 修回日期:2015-11-07 出版日期:2016-03-25 发布日期:2016-03-25
  • 基金资助:

    天津市应用基础与前沿技术研究计划项目(15JCYBJC16000);国家自然科学基金(61502331)

A simple and efficient reversible data hiding
scheme based on histogram of difference image 

ZHANG Kai   

  1. (College of Science & Technology,Tianjin University of Finance & Economics,Tianjin 300222,China)
  • Received:2015-08-19 Revised:2015-11-07 Online:2016-03-25 Published:2016-03-25

摘要:

提出一种基于图像相邻像素差值直方图的可逆信息隐藏方法,运用该方法同时提高了信息嵌入容量和嵌入信息后的图像质量。首先对原始图像进行分块、扫描并求取差值直方图,然后在分块图像的差值直方图中选取最高的两个峰值点并向两个方向移位来产生空缺用于信息嵌入。算法充分利用了自然图像的相邻相似特性,同时提高了基于直方图的信息隐藏方案的峰值点数目和峰值点高度,从而大大提高信息嵌入容量。此外,算法在信息嵌入前对待嵌入信息的预处理使得在嵌入同样容量的信息时,对载体图像的影响更小,具有更好的嵌入后图像质量。

关键词: 可逆, 信息隐藏, 差值直方图, 分块

Abstract:

We propose a reversible data hiding scheme based on histogram of difference image, which improves both embedding capacity and image quality after data embedding. The original image is firstly divided into blocks and scanned, and then differences between neighbor pixels are calculated. After that, the two peak points of the histogram of difference image are shifted bidirectionally to get the gap for data embedding. The data is preprocessed before it is embedded. The scheme makes full use of the similarity between neighbor pixels of natural images to increase both the number and the height of peak points of the histogram, thus improving the embedding capacity obviously. Besides, the preprocess of the information to be embedded makes the impact on data embedding smaller, and achieves embedded images of better quality.

Key words: reversible;data hiding;histogram of difference image;block