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    End-to-End Learned, Optically Coded Super-resolution SPAD Camera

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    Sun2019SingleShotSPAD.pdf
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    Type
    Article
    Authors
    Sun, Qilin cc
    Zhang, Jian
    Dun, Xiong
    Ghanem, Bernard cc
    Peng, Yifan
    Heidrich, Wolfgang cc
    Date
    2020-03-18
    Online Publication Date
    2020-03-18
    Print Publication Date
    2020-04-14
    Permanent link to this record
    http://hdl.handle.net/10754/661065
    
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    Abstract
    Single Photon Avalanche Photodiodes (SPADs) have recently received a lot of attention in imaging and vision applications due to their excellent performance in low-light conditions, as well as their ultra-high temporal resolution. Unfortunately, like many evolving sensor technologies, image sensors built around SPAD technology currently suffer from a low pixel count. In this work, we investigate a simple, low-cost, and compact optical coding camera design that supports high resolution image reconstructions from raw measurements with low pixel counts. We demonstrate this approach for regular intensity imaging, depth imaging, as well transient imaging. Our method uses an end-to-end framework to simultaneously optimize the optical design and a reconstruction network for obtaining super-resolved images from raw measurements. The optical design space is that of an engineered point spread function (implemented with diffractive optics), which can be considered an optimized anti-aliasing filter to preserve as much high resolution information as possible despite imaging with a low pixel count, low fill-factor SPAD array. We further investigate a deep network for reconstruction. The effectiveness of this joint design and reconstruction approach is demonstrated for a range of different applications, including high speed imaging, and time of flight depth imaging, as well as transient imaging. While our work specifically focuses on low-resolution SPAD sensors, similar approaches should prove effective for other emerging image sensor technologies with low pixel counts and low fill-factors.
    Citation
    Sun, Q., Zhang, J., Dun, X., Ghanem, B., Peng, Y., & Heidrich, W. (2020). End-to-end Learned, Optically Coded Super-resolution SPAD Camera. ACM Transactions on Graphics, 39(2), 1–14. doi:10.1145/3372261
    Sponsors
    This work was fully supported by King Abdullah University of Science and Technology individual baseline funding and Visual Computing Center competitive funding.
    Publisher
    Association for Computing Machinery (ACM)
    Journal
    ACM transactions on graphics
    DOI
    10.1145/3372261
    Additional Links
    https://vccimaging.org/Publications/Sun2019SingleShotSPAD/Sun2019SingleShotSPAD.pdf
    ae974a485f413a2113503eed53cd6c53
    10.1145/3372261
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