摘要
为了提高原信息隐藏算法的不可感知性和扩展其隐藏容量,根据人类视觉系统(HVS)相关知识,从提高信息隐藏容量的角度出发,根据人眼对图像不同区域的敏感程度,充分利用人类视觉系统的方向特性、纹理特性和亮度特性对原算法进行改进。并用文本和图像文件分别作为秘密信息,couPle.bmp灰度图像为载体图像,进行算法对比试验。实验表明改进后算法缓解了信息隐藏系统各指标之间存在的矛盾,提高了秘密信息隐藏率和抵抗攻击的能力,进一步增强了隐藏系统的安全性,为大容量信息隐藏提供了一种思路。
In order to improve the imperceptibility of the original information hiding algorithm and expand its hiding capacity, ac cording to the relevant knowledge of human visual system （HVS） and the sensitive degree of human eyes to different areas of image, proceeding from improvement of the information hiding capacity, the origenal algorithm is improved by making full use of the direc- tion, texture and brightness features of human visual system. The text and image files are respectively taken as a secret information. BMP gray image is taken as a carrier image, The comparison experiments show that the improved algorithm remits the contradiction between hidden information system and each index, improves the secret information hiding rate and resistance ability against external attacks, enhances the hidden system security, and offers a new idea for the large capacity information hiding.
出处
《现代电子技术》
2011年第18期56-59,共4页
Modern Electronics Technique
关键词
HVS
信息隐藏
算法改进
载体图像
HVS
information hiding
algorithm improvement
carrier image
