计算机应用 ›› 2010, Vol. 30 ›› Issue (1): 186-189.

• 信息安全 • 上一篇    下一篇

基于预测误差差值扩展的彩色图像无损数据隐藏

熊志勇,蒋天发   

  1. 中南民族大学计算机科学学院
  • 收稿日期:2009-07-03 修回日期:2009-08-31 发布日期:2010-01-01 出版日期:2010-01-01
  • 通讯作者: 熊志勇
  • 基金资助:
    国家民委重点科研项目基金

Lossless data hiding for color images based on prediction error difference expansion

  • Received:2009-07-03 Revised:2009-08-31 Online:2010-01-01 Published:2010-01-01
  • Contact: XIONG Zhi-yong

摘要: 将Tian差值扩展技术应用于彩色图像中,提出一种利用预测误差差值进行扩展嵌入的彩色图像无损数据隐藏算法。传统的差值扩展和预测误差扩展嵌入技术最大的缺点是过分利用差值造成载体图像质量严重下降。针对这一问题,该方法利用色彩分量间的相关性减小差值,并将差值扩展量分散到两个色彩分量中,同时,对差值直方图平移技术进行改进,使得同等嵌入率下图像质量达到最佳。实验结果表明,与其他算法相比,本算法在嵌入率和图像质量方面都有明显提高。

关键词: 无损数据隐藏, 预测误差差值扩展, 峰值信噪比, 色彩分量

Abstract: Applying Tian's difference expansion to color images, this paper proposed a lossless data hiding method for color images based on prediction error difference expansion. To solve the quality decline of stego-images from excessive modulation to pixels, the proposed method dispersed smaller expansion to two color components, and improved histogram shifting technique. Experimental results show that both the capacity for embedding users' message and the stego-image quality are significantly improved, when compared with other algorithms.

Key words: reversible data hiding, prediction error difference expansion, Peak Signalto Noise Ratio (PSNR), color component