Motion-corrected Fourier ptychography.
Motion-corrected Fourier ptychography.
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DOI：
10.1364/boe.7.004543
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发表时间：
2016-06
影响因子：
3.4
通讯作者：
Liheng Bian;G. Zheng;K. Guo;J. Suo;Changhuei Yang;Feng Chen;Qionghai Dai
中科院分区：
文献类型：
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作者：
Liheng Bian;G. Zheng;K. Guo;J. Suo;Changhuei Yang;Feng Chen;Qionghai Dai
傅立叶重叠关联成像（FP）是最近提出的一种用于高空间带宽积成像的计算成像技术。在真实的设备中，如内窥镜和透射电子显微镜，常见的样品运动大大降低了FP重建，并限制了其实用性。在本文中，我们提出了一种新的FP重建方法，有效地纠正未知的样本运动。具体来说，我们自适应地更新样本的傅立叶频谱从低空间频率区域向高空间频率区域，与一个额外的运动恢复和相位偏移补偿程序的每个子频谱。利用相位恢复冗余理论，相邻子谱之间需要的较大重叠为成功的运动恢复提供了准确的指导。对仿真数据和真实的采集数据的实验结果表明，该方法能够对未知样本运动进行校正，校正的标准偏差可达视场尺度的10%。我们已经发布了我们的源代码用于非商业用途，它可能会在相关的FP平台，如内窥镜和透射电子显微镜中找到广泛的应用。
Fourier ptychography (FP) is a recently proposed computational imaging technique for high space-bandwidth product imaging. In real setups such as endoscope and transmission electron microscope, the common sample motion largely degrades the FP reconstruction and limits its practicability. In this paper, we propose a novel FP reconstruction method to efficiently correct for unknown sample motion. Specifically, we adaptively update the sample's Fourier spectrum from low spatial-frequency regions towards high spatial-frequency ones, with an additional motion recovery and phase-offset compensation procedure for each sub-spectrum. Benefiting from the phase retrieval redundancy theory, the required large overlap between adjacent sub-spectra offers an accurate guide for successful motion recovery. Experimental results on both simulated data and real captured data show that the proposed method can correct for unknown sample motion with its standard deviation being up to 10% of the field-of-view scale. We have released our source code for non-commercial use, and it may find wide applications in related FP platforms such as endoscopy and transmission electron microscopy.