基于DCT分量丢弃的图像信息隐匿技术  

A Image Hiding Algorithm based on Discarding of Low-frequency Part

作　　者：王坚[1] 侯嘉[1] 王运兵[1] 

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《信息安全与通信保密》2012年第8期119-121,125,共4页Information Security and Communications Privacy

摘　　要：文中提出了一种基于DCT分量丢弃的图像信息隐匿方法,利用恢复被丢弃的DCT低频分量时,因选择不同高频分量而产生的差异携带秘密信息。发送端通过将图像分块,按一定规则将信息嵌入部分块中待丢弃的低频分量并重新计算高频分量,然后发送端将丢弃低频分量的图像块的高频分量与其他图像块一并发送,接收端以接收到的高频分量和作为密钥的高频分量分别重新计算低频分量,两次计算的差值即为携带的隐匿信息。At the transmitter, the image is divided into blocks, and theses blocks are transformed by DCT. The secret information is hidden in the low-frequency part of some image blocks in accordance with certain rule. After calculating the high-frequency part of these image blocks through the low-frequency part with secret information, the low- frequency part of these Image Blocks is discarded, while at the receiver, the original image is recovered through reconstruction of the discarded low-frequency part of some Image blocks. Meanwhile, the secret information is drawn.

关 键 词：数字图像 DCT低频分量丢弃 信息隐匿 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]