Recovering three-dimensional shape around a corner using ultrafast time-of-flight imaging
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Raskar_Recovering three-dimensional.pdf
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Author(s)
Velten, Andreas
Willwacher, Thomas
Gupta, Otkrist
Veeraraghavan, Ashok
Raskar, Ramesh
Bawendi, Moungi G
Date Issued
March 2012
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Velten, Andreas, Thomas Willwacher, Otkrist Gupta, Ashok Veeraraghavan, Moungi G. Bawendi, and Ramesh Raskar. “Recovering three-dimensional shape around a corner using ultrafast time-of-flight imaging.” Nature Communications 3 (March 20, 2012): 745.
Version
Author's final manuscript
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.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Media Laboratory
Program in Media Arts and Sciences (Massachusetts Institute of Technology)
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/ncomms1747
