Toward Long-Distance Subdiffraction Imaging Using Coherent Camera Arrays
Toward Long-Distance Subdiffraction Imaging Using Coherent Camera Arrays
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DOI：
10.1109/tci.2016.2557067
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发表时间：
2016-09-01
影响因子：
5.4
通讯作者：
Veeraraghavan, Ashok
中科院分区：
文献类型：
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作者：
Holloway, Jason;Asif, M. Salman;Veeraraghavan, Ashok
在这项工作中，我们提出使用相机阵列加上相干照明作为一种有效的方法，提高空间分辨率在长距离图像的一个因素的10倍及以上。叠联成像的最新进展表明，人们可以在显微镜中成像超过物镜透镜的衍射极限。我们展示了一个类似的成像系统，在远程成像超过衍射极限的图像。我们模拟了一个相机阵列与一个单一的相机连接到XY平移阶段。我们表明，一个适当的相位恢复为基础的重建算法可以有效地恢复丢失的高分辨率细节从多个低分辨率采集图像。我们分析了噪声的影响，所需的图像重叠程度，以及增加合成孔径大小对重建图像质量的影响。我们表明，相干相机阵列有可能大大提高成像性能。我们的模拟显示，10倍以上的分辨率增益是可以实现的。此外，我们的概念验证系统的实验结果显示，对于真实的场景，分辨率增益为4 x - 7 x。所有实验数据和代码都在项目网页上公开提供。最后，我们介绍和分析模拟一个新的策略，捕捉宏观傅立叶重叠关联图像在一个单一的快照，虽然使用相机阵列。
In this work, we propose using camera arrays coupled with coherent illumination as an effective method of improving spatial resolution in long distance images by a factor of ten and beyond. Recent advances in ptychography have demonstrated that one can image beyond the diffraction limit of the objective lens in a microscope. We demonstrate a similar imaging system to image beyond the diffraction limit in long range imaging. We emulate a camera array with a single camera attached to an XY translation stage. We show that an appropriate phase retrieval based reconstruction algorithm can be used to effectively recover the lost high resolution details from the multiple low resolution acquired images. We analyze the effects of noise, required degree of image overlap, and the effect of increasing synthetic aperture size on the reconstructed image quality. We show that coherent camera arrays have the potential to greatly improve imaging performance. Our simulations show resolution gains of 10 x and more are achievable. Furthermore, experimental results from our proof-of-concept systems show resolution gains of 4 x - 7 x for real scenes. All experimental data and code is made publicly available on the project webpage. Finally, we introduce and analyze in simulation a new strategy to capture macroscopic Fourier Ptychography images in a single snapshot, albeit using a camera array.