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Published October 27, 2015 | Published + Supplemental Material
Journal Article Open

Encrypted Three-dimensional Dynamic Imaging using Snapshot Time-of-flight Compressed Ultrafast Photography


Compressed ultrafast photography (CUP), a computational imaging technique, is synchronized with short-pulsed laser illumination to enable dynamic three-dimensional (3D) imaging. By leveraging the time-of-flight (ToF) information of pulsed light backscattered by the object, ToF-CUP can reconstruct a volumetric image from a single camera snapshot. In addition, the approach unites the encryption of depth data with the compressed acquisition of 3D data in a single snapshot measurement, thereby allowing efficient and secure data storage and transmission. We demonstrated high-speed 3D videography of moving objects at up to 75 volumes per second. The ToF-CUP camera was applied to track the 3D position of a live comet goldfish. We have also imaged a moving object obscured by a scattering medium.

Additional Information

© 2016 Macmillan Publishers Limited. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Received: 25 June 2015; Accepted: 29 September 2015; Published: 27 October 2015. The authors thank Liren Zhu for experimental assistance, and Prof. James Ballard for close reading of the manuscript. A patent on this prototype is currently pending. This work was supported in part by National Institutes of Health grants DP1 EB016986 (NIH Director's Pioneer Award) and R01 CA186567 (NIH Director's Transformative Research Award). Author Contributions: J.L. and L.G. designed and built the system. J.L. performed all experiments and analysed the data. L.G. and P.H. performed some experiments and analysed the data. C.L. prepared samples and performed some experiments. L.V.W. contributed the conceptual system and provided supervision. All authors were involved in preparing and revising the manuscript. The authors declare no competing financial interests.

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