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Toward Long-Distance Subdiffraction Imaging Using Coherent Camera Arrays

Holloway, Jason and Asif, M. Salman and Sharma, Manoj Kumar and Matsuda, Nathan and Horstmeyer, Roarke and Cossairt, Oliver and Veeraraghavan, Ashok (2016) Toward Long-Distance Subdiffraction Imaging Using Coherent Camera Arrays. IEEE Transactions on Computational Imaging, 2 (3). pp. 251-265. ISSN 2333-9403.

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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 often 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× and more are achievable. Furthermore, experimental results from our proof-of-concept systems show resolution gains of 4 × -7× 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.

Item Type:Article
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Horstmeyer, Roarke0000-0002-2480-9141
Additional Information:© 2016 IEEE. Manuscript received October 27, 2015; revised March 01, 2016; accepted March 24, 2016. Date of publication April 20, 2016; date of current version August 05, 2016. This work was supported in part by the National Science Foundation (NSF) under Grant CCF-1527501, NSF CAREER grant IIS-1453192, ONR grants 1(GG010550)//N00014-14-1-0741 and N00014-15-1-2735, DARPA RE-VEAL grant HR0011-16-C-0028, and a Northwestern University McCormick Catalyst grant. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Peyman Milanfar.
Funding AgencyGrant Number
Office of Naval Research (ONR)1(GG010550)//N00014-14-1-0741
Office of Naval Research (ONR)N00014-15-1-2735
Defense Advanced Research Projects Agency (DARPA)HR0011-16-C-0028
Northwestern UniversityUNSPECIFIED
Subject Keywords:Phase retrieval, ptychography, synthetic aperture imaging, high-resolution imaging
Issue or Number:3
Record Number:CaltechAUTHORS:20170111-144334789
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73443
Deposited By: Kristin Buxton
Deposited On:20 Jan 2017 07:08
Last Modified:03 Oct 2019 16:28

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