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应用二值图像信息隐藏技术实现彩色图像中的安全隐写

刘春庆 梁光岚 王朔中 张新鹏   

  1. 上海大学 通信与信息工程学院，上海200072
  • 收稿日期:2007-03-30 修回日期:2007-05-26 出版日期:2007-07-30 发布日期:2007-07-30

Steganography in Color Images Using a Binary Image Data Hiding Scheme

LIU Chun-qing, LIANG Guang-lan, WANG Shuo-zhong, ZHANG Xin-peng   

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072,China
  • Received:2007-03-30 Revised:2007-05-26 Online:2007-07-30 Published:2007-07-30

被引次数

13

摘要： 该文提出一种以彩色图像为载体的安全隐写方法，应用二值图像信息嵌入技术，将隐蔽信息隐藏在颜色分量的较高层位面中，可实现优良的隐蔽性和较大的嵌入量。所使用的二值图像数据隐藏方案包括一组完备的规则，能够准确判断边缘像素是否可承载嵌入数据，保证嵌入数据的无差错盲提取，并可引入密钥以增强安全性。实验表明，在彩色图像中数据嵌入量达到每像素1.5 bits时视觉不可察觉，峰值信噪比保持在40dB以上，直方图无异常，并能抵御多种有效的隐写分析算法，兼顾了隐蔽信息容量和安全性。

关键词: 隐写, 彩色图像, 二值图像

Abstract: A new method for hiding secret information in color images is proposed, in which bit planes are treated as binary images. A set of rules is used to check boundary pixels in the bit planes for data embedding eligibility. These rules can ensure correct extraction of the secret data from the stego-image without any other additional information. A key is introduced in identifying the eligible embedding positions to enhance security. Experiments show that, at an embedding rate of 1.5 bits per color pixel, the stego-images have no perceptual and histogram abnormality with PSNR values greater than 40 dB, and can resist several effective methods for steganalytical detection, achieving a good trade-off between security and embedding capacity.

Key words: steganography, color image, binary image