TY - GEN
T1 - Reconstructing rooms using photon echoes
T2 - 2017 IEEE International Conference on Computational Photography, ICCP 2017
AU - Pediredla, Adithya Kumar
AU - Buttafava, Mauro
AU - Tosi, Alberto
AU - Cossairt, Oliver Strides
AU - Veeraraghavan, Ashok
N1 - Funding Information:
This work was supported in part by NSF CAREER Grant IIS-1453192, DARPA REVEAL grant HR0011-16-C-0028, ONR grant N00014-15-1-2735, ARO grant W911NF-12-1-0407, and the Big-Data Private-Cloud Research Cyberinfrastructure MRI-award funded by NSF under grant CNS- 1338099 and by Rice University.
Publisher Copyright:
© 2017 IEEE.
PY - 2017/6/16
Y1 - 2017/6/16
N2 - Can we reconstruct the entire internal shape of a room if all we can directly observe is a small portion of one internal wall, presumably through a window in the room? While conventional wisdom may indicate that this is not possible, motivated by recent work on 'looking around corners', we show that one can exploit light echoes to reconstruct the internal shape of hidden rooms. Existing techniques for looking around the corner using transient images model the hidden volume using voxels and try to explain the captured transient response as the sum of the transient responses obtained from individual voxels. Such a technique inherently suffers from challenges with regards to low signal to background ratios (SBR) and has difficulty scaling to larger volumes. In contrast, in this paper, we argue for using a plane-based model for the hidden surfaces. We demonstrate that such a plane-based model results in much higher SBR while simultaneously being amenable to larger spatial scales. We build an experimental prototype composed of a pulsed laser source and a single-photon avalanche detector (SPAD) that can achieve a time resolution of about 30ps and demonstrate high-fidelity reconstructions both of individual planes in a hidden volume and for reconstructing entire polygonal rooms composed of multiple planar walls.
AB - Can we reconstruct the entire internal shape of a room if all we can directly observe is a small portion of one internal wall, presumably through a window in the room? While conventional wisdom may indicate that this is not possible, motivated by recent work on 'looking around corners', we show that one can exploit light echoes to reconstruct the internal shape of hidden rooms. Existing techniques for looking around the corner using transient images model the hidden volume using voxels and try to explain the captured transient response as the sum of the transient responses obtained from individual voxels. Such a technique inherently suffers from challenges with regards to low signal to background ratios (SBR) and has difficulty scaling to larger volumes. In contrast, in this paper, we argue for using a plane-based model for the hidden surfaces. We demonstrate that such a plane-based model results in much higher SBR while simultaneously being amenable to larger spatial scales. We build an experimental prototype composed of a pulsed laser source and a single-photon avalanche detector (SPAD) that can achieve a time resolution of about 30ps and demonstrate high-fidelity reconstructions both of individual planes in a hidden volume and for reconstructing entire polygonal rooms composed of multiple planar walls.
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U2 - 10.1109/ICCPHOT.2017.7951478
DO - 10.1109/ICCPHOT.2017.7951478
M3 - Conference contribution
AN - SCOPUS:85025447750
T3 - 2017 IEEE International Conference on Computational Photography, ICCP 2017 - Proceedings
BT - 2017 IEEE International Conference on Computational Photography, ICCP 2017 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 12 May 2017 through 14 May 2017
ER -