物光相位畸变加密数字全息图

根据全息图相位畸变矫正原理，提出一种使物光相位畸变加密的数字全息图像的算法．本算法在傅立叶平面上用相位畸变函数乱置数字全息图的像素，以获得加密数字全息图．其相位畸变函数便是加密和解密数字全息图的密钥．加密和解密算法复杂度均为O（n logn）．加密后，无数据膨胀，便于计算机储存和传输．该加密和解密算法在MATLAB上实现，并对振幅型傅立叶数字全息图进行了加密和解密，以及保密性能测试．实验结果显示，本算法对数字全息图有较强的保密性和安全性。

Encrypting digital holography with aberrated phase of the object wavefront

In the paper a novel way to encrypt digital holograms,which is based on phase-aberrated rectifying of holograms,is proposed.Encrypted digital holograms are generated by scrambling pixels of the original holograms with encryption functions on their Fourier's planes.The phase-aberrated functions are the secret keys for encrypt and decrypt.The complexity of the encrypting and decrypting algorithm are both O(n logn).There is no data expanding after encrypting images.It will be convenient for data accessing and transmitting.The algorithm is implemented on the platform of Matlab 6.1.It has been used to encrypt and decrypt some amplitude Fourier's digital holograms.The security has been tested too.The experimental results show that the secrecy and security of the algorithm are rather good.