摘要： 提出一种自适应的无损像素差分隐藏算法，利用像素块差值的最大值和门限值的关系，在平滑区域和边缘区域嵌入较多的隐藏信息，在中间地带嵌入较少的信息。实验结果表明，该算法可以提高数据隐藏的容量，实现隐藏信息的盲提取，有效抵抗差分直方图的攻击，无损恢复原始载体图像。

关键词: 隐写, 数据隐藏, 像素差值, 盲提取隐写

Abstract: This paper proposes an adaptive lossless pixel differencing steganographic algorithm. By taking advantage of the relationship between the maximum value among the difference values of the pixel block and the threshold, it embeds more information in the smooth areas and the edge areas of the host image, while embedding less information in the middle gray image areas. Experimental results show that the algorithm can improve the embedding capacity, achieve blind abtraction of hidden information, resist difference histogram attack efficiently, and recover images losslessly.

Key words: steganography, data hiding, pixel-value difference, blind extraction

中图分类号: 

• TP301.6