摘要
分析了压缩算法以及LSB算法对图像的影响,发现压缩效果存在块差异,因此,隐藏在图像中的秘密信息在图像有损压缩后,不同分块中的提取效果也是存在好坏差别,利用这种差别,提出一种图像信息隐藏新算法,即把秘密信息嵌入在抗压缩性能较好的分块上,从而实现具有一定抗压缩性能的空域信息隐藏算法。仿真实验证明:算法不仅嵌入提取简单,对JPEG和JPEG 2000具有一定抵抗性,而且算法嵌入容量大,能满足大图像中嵌入小图像的需求。
The influence of compression algorithm and LSB algorithm on images are analyzed. It is found that the compres-sion results have block differences. So after lossy compression of image, the secret information hiding in the image also has differences of extraction effects in different blocks. With these differences, a new image information hiding algorithm is proposed, which embeds the secret information in blocks that have good anti-compression performance, so as to realize the space information hiding algorithm with anti-compression performance. The simulation results show that the proposed algorithm not only embeds and extracts information easily, but also has a certain resistance to JPEG and JPEG2000. The embedding capacity of the algorithm is large enough to meet the requirements of embedding small image in large image.
出处
《现代电子技术》
2013年第17期75-77,共3页
Modern Electronics Technique
基金
国家重点实验室基金项目(9140C53040313002)
关键词
信息隐藏
图像
抗压缩算法
LSB
information hiding
image
anti-compression algorithm
LSB
