Information Encryption Based on Digital Holography and Phase Retrieve Algorithm
Nie Shouping · Chinese Journal of Lasers · 2007
An information encryption method is proposed based on digital holographic technique and phase retrieve algorithm.The phase-only information of a digital hologram is gotten by using phase retrieve algorithm,and then the hologram is encrypted.The reconstructed hologram can be obtained by applying inverse Fourier transform(IFT) to encrypt the hologram.The image can be reconstructed through Fresnel approximation method and convolution method.The presented method is quite different to ordinary random phase encryption methods,and the random phase element is not needed.Experimental results show that this method is suitable for two-and three-dimensional object encryption.