Wang Xiaogang, Chen Wen, Chen Xudong
Opt Express. 2015 Mar 9;23(5):6239-53. doi: 10.1364/OE.23.006239.
In this paper, we develop a new optical information authentication system based on compressed double-random-phase-encoded images and quick-response (QR) codes, where the parameters of optical lightwave are used as keys for optical decryption and the QR code is a key for verification. An input image attached with QR code is first optically encoded in a simplified double random phase encoding (DRPE) scheme without using interferometric setup. From the single encoded intensity pattern recorded by a CCD camera, a compressed double-random-phase-encoded image, i.e., the sparse phase distribution used for optical decryption, is generated by using an iterative phase retrieval technique with QR code. We compare this technique to the other two methods proposed in literature, i.e., Fresnel domain information authentication based on the classical DRPE with holographic technique and information authentication based on DRPE and phase retrieval algorithm. Simulation results show that QR codes are effective on improving the security and data sparsity of optical information encryption and authentication system.
在本文中，我们基于压缩双随机相位编码图像和二维码开发了一种新型光学信息认证系统，其中光波参数用作光学解密的密钥，而二维码则作为验证密钥。首先，将附加有二维码的输入图像采用简化的双随机相位编码（DRPE）方案进行光学编码，无需使用干涉设置。利用带有二维码的迭代相位恢复技术，从电荷耦合器件（CCD）相机记录的单编码强度图案中生成压缩双随机相位编码图像，即用于光学解密的稀疏相位分布。我们将该技术与文献中提出的其他两种方法进行比较，即基于具有全息技术的经典DRPE的菲涅耳域信息认证以及基于DRPE和相位恢复算法的信息认证。仿真结果表明，二维码对于提高光学信息加密和认证系统的安全性及数据稀疏性是有效的。
