全数字全息术在图像信息隐藏中的应用

提出了全数字全息术在计算机图像信息隐藏中的应用。待隐藏的秘密信息以及公开的承载信息均为灰度级静止图像。首先对待隐藏的计算机信息图进行全息变换,即通过计算全息图的制作步骤制作出全息图的图像文件,然后再进行Arnold对称性变换。在此基础上,将秘密图像嵌入到承载图像的DCT域的中频系数中。全数字全息术的引入进一步增强了隐藏图像的透明性,通过控制制作全息图时的参数可起到加密的作用,相当于增加了一把秘密钥匙,具有较高的保密性和稳健性。

Application of all-digital holography in digital image hiding

It is presented here that the holographic transform is applied to the digital image hiding.The secret message and the host message are gray-images. The secret image was first transformed into a hologram,and then Arnold transform was performed.DCT was applied in the original images.Then the secret image was embedded into the DCT middle coefficients.The application of the holographic transform improves the transparency of the secret image;the secrecy of the image is enhanced by controlling the parameter of the hologram,and add another key to have invisibility and certain robust.