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Recovering three-dimensional shape around a corner using ultrafast time-of-flight imaging

Author

Listed:
  • Andreas Velten

    (MIT Media Lab, Massachusetts Institute of Technology)

  • Thomas Willwacher

    (Harvard University)

  • Otkrist Gupta

    (MIT Media Lab, Massachusetts Institute of Technology)

  • Ashok Veeraraghavan

    (Rice University)

  • Moungi G. Bawendi

    (Massachusetts Institute of Technology)

  • Ramesh Raskar

    (MIT Media Lab, Massachusetts Institute of Technology)

Abstract

The recovery of objects obscured by scattering is an important goal in imaging and has been approached by exploiting, for example, coherence properties, ballistic photons or penetrating wavelengths. Common methods use scattered light transmitted through an occluding material, although these fail if the occluder is opaque. Light is scattered not only by transmission through objects, but also by multiple reflection from diffuse surfaces in a scene. This reflected light contains information about the scene that becomes mixed by the diffuse reflections before reaching the image sensor. This mixing is difficult to decode using traditional cameras. Here we report the combination of a time-of-flight technique and computational reconstruction algorithms to untangle image information mixed by diffuse reflection. We demonstrate a three-dimensional range camera able to look around a corner using diffusely reflected light that achieves sub-millimetre depth precision and centimetre lateral precision over 40 cm×40 cm×40 cm of hidden space.

Suggested Citation

  • Andreas Velten & Thomas Willwacher & Otkrist Gupta & Ashok Veeraraghavan & Moungi G. Bawendi & Ramesh Raskar, 2012. "Recovering three-dimensional shape around a corner using ultrafast time-of-flight imaging," Nature Communications, Nature, vol. 3(1), pages 1-8, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1747
    DOI: 10.1038/ncomms1747
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    Cited by:

    1. Jingdan Liu & Miguel Marquez & Yingming Lai & Heide Ibrahim & Katherine Légaré & Philippe Lassonde & Xianglei Liu & Michel Hehn & Stéphane Mangin & Grégory Malinowski & Zhengyan Li & François Légaré &, 2024. "Swept coded aperture real-time femtophotography," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Sheila Seidel & Hoover Rueda-Chacón & Iris Cusini & Federica Villa & Franco Zappa & Christopher Yu & Vivek K Goyal, 2023. "Non-line-of-sight snapshots and background mapping with an active corner camera," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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