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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Implementing compression and encryption of phase-shifting digital holograms for three-dimensional object reconstruction
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Implementing compression and encryption of phase-shifting digital holograms for three-dimensional object reconstruction

机译：实现相移数字全息图的压缩和加密以进行三维对象重建

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摘要

We report a method of simultaneous compression and encryption of multiple images based on a specific spectral fusion. This method is able to manipulate target images with close spectral characteristics. For that purpose, we introduce an optimized algorithm for the task of simultaneously compressing and encrypting phase-shifting digital holograms (PSIDH) for three-dimensional object reconstruction. This technique is based on a spectral fusion, without overlapping, of interference patterns I corresponding to phase shifts. We first divide the spectral plane into several areas and optimize the bandwidth of the spectral domain. Each area is affected to a spectrum of an intensity pattern I_(PSIDH). A two-level encryption of these patterns is realized. First, we apply a discrete cosine transform (DCT) spectral fusion after addition of an input key image. Then, each DCT-spectral interference pattern is multiplied with a specific random intensity function to uniformly distribute the spectral intensity. To validate our approach, many numerical simulations are performed. The simplicity and robustness of our tests make this algorithm appealing for object reconstruction.
机译：我们报告了一种基于特定频谱融合的同时压缩和加密多个图像的方法。这种方法能够处理具有近光谱特征的目标图像。为此，我们引入了一种优化算法，用于同时压缩和加密相移数字全息图（PSIDH）的三维对象重建任务。该技术基于与相移相对应的干涉图样I的光谱融合而不重叠。我们首先将频谱平面划分为几个区域，并优化频谱域的带宽。每个区域都受到强度模式I_（PSIDH）的频谱的影响。实现了这些模式的两级加密。首先，在添加输入关键图像之后，我们应用离散余弦变换（DCT）频谱融合。然后，将每个DCT频谱干涉图样与特定的随机强度函数相乘，以均匀地分布频谱强度。为了验证我们的方法，执行了许多数值模拟。我们测试的简单性和鲁棒性使该算法对对象重建具有吸引力。

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