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Wavefront reconstruction in digital off-axis holography via sparse coding of amplitude and absolute phase

机译:通过幅度和绝对相位的稀疏编码在数字离轴全息中进行波前重建

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This work presents the new method for wavefront reconstruction from a digital hologram recorded in off-axis configuration. The main feature of the proposed algorithm is a good ability for noise filtration due to the original formulation of the problem taking into account the presence of noise in the recorded intensity distribution and the sparse phase and amplitude reconstruction approach with the data-adaptive block-matching 3D technique. Basically, the sparsity assumes that low dimensional models can be used for phase and amplitude approximations. This low dimensionality enables strong suppression of noisy components and accurate revealing of the main features of the signals of interest. The principal point is that dictionaries of these sparse models are not known in advance and reconstructed from given noisy observations in a multiobjective optimization procedure. We show experimental results demonstrating the effectiveness of our approach. (C) 2015 Optical Society of America
机译:这项工作提出了从离轴配置中记录的数字全息图重建波前的新方法。该算法的主要特点是具有良好的噪声过滤能力,这是因为该问题的原始表述考虑了记录的强度分布中是否存在噪声以及采用数据自适应块匹配的稀疏相位和幅度重建方法3D技术。基本上,稀疏性假定可以将低维模型用于相位和幅度近似。这种低维度特性可以有效抑制噪声成分,并准确显示感兴趣信号的主要特征。主要要点是这些稀疏模型的字典是事先未知的,并且是在多目标优化过程中根据给定的嘈杂观测值重建的。我们显示了实验结果,证明了我们方法的有效性。 (C)2015年美国眼镜学会

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