计算机工程 ›› 2012, Vol. 38 ›› Issue (17): 102-105.doi: 10.3969/j.issn.1000-3428.2012.17.029

• 安全技术 • 上一篇    下一篇

基于图像块像素差的大容量无损信息隐藏算法

李晓博,周 诠   

  1. (中国空间技术研究院西安分院空间微波技术重点实验室,西安 710100)
  • 收稿日期:2011-10-26 修回日期:2011-12-24 出版日期:2012-09-05 发布日期:2012-09-03
  • 作者简介:李晓博(1983-),男,博士研究生,主研方向:信息隐藏,卫星数据传输与信息处理;周 诠,研究员、博士生导师
  • 基金项目:
    国家空间微波技术重点实验室基金资助项目(9140C5303020601, 9140C5305020706)

High-capacity Lossless Information Hiding Algorithm Based on Pixel Difference of Image Block

LI Xiao-bo, ZHOU Quan   

  1. High-capacity Lossless Information Hiding Algorithm Based on Pixel Difference of Image Block
  • Received:2011-10-26 Revised:2011-12-24 Online:2012-09-05 Published:2012-09-03

摘要: 为使提取嵌入的秘密信息后能无损恢复原始载体图像,提出一种基于图像块相邻像素差的大容量无损信息隐藏算法。将原始载体图像进行分块,并按一定顺序扫描图像块得到一系列像素序列,通过计算每个序列中相邻像素的差值得到差值直方图,从中选择2个最大峰值点将秘密信息嵌入。实验结果表明,与其他无损嵌入算法相比,该算法在保证较好不可见性的情况下,信息嵌入容量较大,峰值信噪比较高。

关键词: 无损信息隐藏, 相邻像素差, 最大峰值点, 像素差直方图, 隐藏容量

Abstract: A high-capacity lossless information hiding algorithm based on adjacent pixel differences of image block is proposed, which can recover the original image in lossless way after the hidden data are extracted from the stego image. It divides a cover image into a number of non-overlapping blocks, and sequences of pixels are obtained by scanning each image block in a given order. Pixel difference histograms are obtained by calculating adjacent pixel differences in each sequence. And the two maximal peak points in each pixel difference histogram are used to embed secret data. Experimental results show that compared with other lossless data hiding algorithms, the proposed algorithm can achieve large data hiding capacity and high PSNR while keeping image quality of the stego image high.

Key words: lossless information hiding, adjacent pixel difference, maximal peak point, pixel difference histogram, hiding capacity

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