Double-image self-encoding and hiding based on phase-truncated Fourier transforms and phase retrieval
Double-image self-encoding and hiding based on phase-truncated Fourier transforms and phase retrieval
复制标题
基于相位截断傅里叶变换和相位检索的双图像自编码和隐藏
DOI：
10.1016/j.optcom.2011.06.025
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发表时间：
2011-09
影响因子：
2.4
通讯作者：
Daomu Zhao
中科院分区：
文献类型：
--
作者：
Xiaogang Wang;Daomu Zhao
提出了一种基于相位截断傅立叶变换和相位恢复的加密方法，将两幅隐藏图像加密为一幅公开图像。该方法首先将两幅原始图像中的一幅图像直接分割成两个相位掩模（PM）作为密钥进行加密，然后将其与相位恢复算法生成的PM相乘，实现对两幅原始图像的自编码。最后，整个加密过程通过傅立叶变换运算完成。在解密过程中，未经分离的图像和用作加密密钥的两个PM都被视为编码数据。加密系统是非对称的，这意味着加密的密钥与解密的密钥不同。数值仿真结果表明，该方法的可行性和良好的性能。
We propose a method to encrypt two covert images into an overt image based on phase-truncated Fourier transforms and phase retrieval. In this method, the two original images are self-encoded in the manner that one of the two images is directly separated into two phase masks (PMs) and used as keys for encryption, and then multiplied by a PM which is generated by using phase retrieval algorithm. At last, the whole encryption process is completed by a Fourier transform operation. In the decryption process, the image without a separation and the two PMs used as keys for encryption are all treated as encoded data. The cryptosystem is asymmetric which means the keys for encryption are different from those for decryption. Numerical simulations are presented to show the viability and good performance of the proposed method.
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