摘要： 在双随机相位编码的基础上，提出以一幅完全对称的图像为宿主图像进行灰度图像加密隐藏的方法。将待隐藏的灰度图像进行双随机相位编码，根据对称图像的性质将编码信息的实部和虚部以一定的权值分别隐藏于宿主图像的相应子图像中，解密后能够得到完全无失真的再现图像。实验结果表明，在知道密钥的情况下，只须极小地叠加权值就能完全无失真地提取隐藏图像。

关键词: 图像加密, 双随机相位编码, 密钥

Abstract: A new technique of gray image encryption and hiding based on a large enough symmetric host image using double random phase encoding technique is proposed. Double random phase encoding is implemented on the original image. According to the property of the symmetric image, the real and imaginary parts of the encoding image are hidden in the corresponding subimage of an absolute symmetric host image. Simple extracted and decryption operations can be employed to obtain the reconstructed image without distortion. Experimental results show that in the context of knowing the keys, it can extract the hidden image losslessly just using small weight value.

Key words: image encryption, double random phase encoding, secret key

中图分类号: 

• TP391.41