摘要
提出了一种基于直方图修改的可逆信息隐藏算法,并给出了算法的详细实现方案。该算法利用了图像直方图中的一组零点(或者是最小点)和最大值点,通过修改图像像素的灰度值来隐藏信息,利用直方图隐藏信息的一般算法是利用每一个最大点隐藏一位信息,而提出的算法是利用每一个最大点进行多位信息隐藏,其位数可以根据原图像和隐藏信息后的峰值信噪比进行自适应确定,实验结果表明,该方法不仅可以进行较大容量的信息隐藏,而且相对原始图像能够达到满意的峰值信噪比,具有良好的性能。
A new reversible data hiding algorithm based on histogram modification for grayscale image is proposed, and detailed method of realization is also given. This algorithm utilizes a zero （or minimum point） and maximum point of the histogram of an image and hides data through modifying the pixel grayscale values. In general, reversible data hiding based on histogram modification use one maximum pixel to hide one bit, but the algorithm proposed here uses one maximum point to hide multi-bits, and the number of bit can be determined according to the PSNR between the original image and that after hiding data. Experimental results show that the algorithm can be used to hide high capacity data, and can achieve satisfactory the peak-signal-to-noise ratio （PSNR）, and has better performance.
出处
《计算机工程与设计》
CSCD
北大核心
2008年第15期4082-4085,共4页
Computer Engineering and Design
基金
天津市自然科学基金重点项目(07JCZDJC06600)
关键词
直方图修改
信息隐藏
峰值点和零值点
峰值信噪比
可逆算法
histogram modification
information hiding
peak and zero points
peak-signal-to-noise ratio
reversible algorithm
