Department of Electrical Engineering, National Chung Cheng University, Chiayi, 62107 Taiwan.
Opt Lett. 2009 Dec 15;34(24):3917-9. doi: 10.1364/OL.34.003917.
What we believe to be a new technique, based on a modified Gerchberg-Saxton algorithm (MGSA) and a phase modulation scheme in the Fresnel-transform domain, is proposed to reduce cross talks existing in multiple-image encryption and multiplexing. First, each plain image is encoded and multiplexed into a phase function by using the MGSA and a different wavelength/position parameter. Then all the created phase functions are phase modulated to result in different shift amounts of the reconstruction images before being combined together into a single phase-only function. Simulation results show that the cross talks between multiplexed images have been significantly reduced, compared with prior methods [Opt. Lett.30, 1306 (2005); J. Opt. A8, 391 (2006)], thus presenting high promise in increasing the multiplexing capacity and encrypting grayscale and color images.
我们提出了一种基于改进的 Gerchberg-Saxton 算法（MGSA）和菲涅耳变换域相位调制方案的新技术，用于减少多图像加密和复用中存在的串扰。首先，使用 MGSA 和不同的波长/位置参数，将每个明文图像编码并复用为一个相位函数。然后，对所有生成的相位函数进行相位调制，以在将它们组合成单个纯相位函数之前，导致重建图像的不同移位量。与先前的方法[Opt. Lett.30, 1306（2005）; J. Opt. A8, 391（2006）]相比，仿真结果表明，复用图像之间的串扰已大大减少，因此在提高复用容量和加密灰度和彩色图像方面具有很高的应用前景。
