Digital Image Information Hiding Technology Based on Iterative Blending
Gui Zhang · Chinese Journal of Computers · 2003
The digital image blending is introduced, and the single iterative digital image blending and multiple iterative digital image blending are firstly proposed. With the digital image iterative blending, new kinds of digital image information hiding schemes are presented. Firstly, with the single iterative image blending, a secret image can be hidden in one carrier image, a self-adaptive image hiding algorithm is obtained. The carrier image and the blending parameter can act as the private keys. But, if a malicious attacker get the carrier image and the blending image, it is totally possible for him to recover the secret image. So authors developed the multiple iterative image blending, with which a secret image can be hidden in one carrier image through many images. An image hiding algorithm is obtained. The blending images and the blending parameters and the sequences of the images blended can act as the private keys. It is impossible for an attacker to get all the blending images and the blending parameters, even if the attacker get all the blending images and parameters, he still can not recover the secret image due to the lack of the processes of the blending. Furthermore, the single iterative image blending scheme and the multiple iterative image blending scheme can be used together, which could much more enhance the security and robustness of the hidden image. In order to even more enhance the security and robustness of the hidden image , the scrambling technology can be used as pre-process and post-process of digital image information hiding. The examples show that the schemes can be expediently realized and they are robust in some extent. The techniques also can be used in digital watermarking and other digital application areas.