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Recovering three-dimensional shape around a corner using ultrafast time-of-flight imaging
| March 20, 2012
| Andreas Velten, et al
Posted on 03/20/2012 2:48:27 PM PDT by Stoat
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.
(Excerpt) Read more at nature.com ...
TOPICS: Arts/Photography; Miscellaneous; Science
KEYWORDS: camera; computer; laser; photography; physics; physicsping; science; stringtheory; tech; technology; techping
posted on 03/20/2012 2:48:37 PM PDT
To: ShadowAce; SunkenCiv
“Taking a picture from around a corner” ping.
posted on 03/20/2012 2:49:42 PM PDT
(If you want a vision of the future, imagine a Birkenstock stamping on a human face... forever)
posted on 03/20/2012 4:17:52 PM PDT
by the invisib1e hand
(knowledge puffeth; information deludeth.)
Inverse scattering problems have always been a real bear to solve.
Glad to see they're making progress.
posted on 03/20/2012 7:38:08 PM PDT
(The opinions are solely those of the author and are subject to change without notice.)
To: Stoat; AdmSmith; bvw; callisto; ckilmer; dandelion; ganeshpuri89; gobucks; KevinDavis; ...
Thanks Stoat. So, all, what would you say to my changing this to a more general physics list? There used to be one, this one started as a very small corner of the forum niche list, then we, uh, lost the physics listmeister.
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posted on 03/20/2012 9:16:47 PM PDT
(I come to bury Caesar, not to praise him)
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