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Optical interference-based multiple-image encryption using spherical wave illumination and gyrator transform

机译：使用球面波照明和回转器变换的基于光干涉的多图像加密

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摘要

A new optical interference-based multiple-image encryption using spherical wave illumination and gyrator transform is proposed. In this proposal, each secret color image is divided into normalized red, green, and blue component images and independently encoded into corresponding phase-only component images. Then each phase-only component image of all the images are combined together to produce a single-phase-only component image as an input component image, which is bounded with a random phase mask to form a complex image. The two phase-only masks are analytically obtained from the inverse Fourier transformation of the complex image. The host image is chosen as the first phase-only mask, and the complex image hidden in the host image is regarded as the second phase-only mask. The spherical wave is generated to simultaneously illuminate phase-only masks. Then two modulated masks are gyrator transformed. The corresponding transformed images are phase truncated to obtain encrypted images and amplitude truncated to construct decryption keys. The decryption keys, angles of gyrator transform, wavelength and radius of the spherical wave, and individual decryption keys for authorized users are sensitive keys, which enhance the security layers of the system. The proposed system can be implemented by using optoelectronic architecture. Numerical simulation results demonstrate the flexibility of the system.
机译：提出了一种新的基于光干涉的多图像加密算法，该算法采用球面照明和陀螺仪变换。在该提议中，每个秘密彩色图像被分为归一化的红色，绿色和蓝色分量图像，并且被独立地编码为对应的仅相位分量图像。然后，将所有图像中的每个仅相位分量图像组合在一起，以生成仅输入单相位分量图像作为输入分量图像，然后将其与随机相位掩码绑定以形成复杂图像。从复杂图像的傅立叶逆变换可以解析地获得两个仅相位的蒙版。选择宿主图像作为第一仅相位掩模，并将隐藏在宿主图像中的复合图像视为第二仅相位掩模。产生球面波以同时照亮仅相位掩模。然后，将两个调制的遮罩进行回转器变换。相应的变换图像被相位截断以获得加密的图像，并且振幅被截断以构造解密密钥。解密密钥，回旋器变换的角度，球面波的波长和半径以及授权用户使用的各个解密密钥是敏感密钥，它们增强了系统的安全性。所提出的系统可以通过使用光电架构来实现。数值仿真结果证明了系统的灵活性。

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