Occluded Imaging with Time-of-Flight Sensors
Name
Raskar_Occluded imaging.pdf
Size
20.7 MB
Format
Adobe PDF
Checksum (MD5)
32171fc12e1e887599fe7637fb109827
Author(s)
Kadambi, Achuta
Zhao, Hang
Shi, Boxin
Raskar, Ramesh
Date Issued
March 2016
Journal
ACM Transactions on Graphics
Publisher
Association for Computing Machinery (ACM)
Citation
Kadambi, Achuta; Zhao, Hang; Shi, Boxin and Raskar, Ramesh. “Occluded Imaging with Time-of-Flight Sensors.” ACM Transactions on Graphics 35, 2 (May 2016): 1–12
Version
Author's final manuscript
Abstract
We explore the question of whether phase based Time of Flight (ToF) range cameras can be used for looking around corners and through scattering diffusers. By connecting time of flight measurements with theory from array signal processing we conclude that performance depends on two primary factors: camera modulation frequency and the width of the specular lobe (“shininess”) of the wall. For purely Lambertian walls, commodity time of flight sensors achieve resolution on the order of meters between targets. For seemingly diffuse walls, such as posterboard, the resolution is drastically reduced, to the order of ten centimeters. In particular, we find that the relationship between reflectance and resolution is nonlinear—a slight amount of shininess can lead to a dramatic improvement in resolution. Since many realistic scenes exhibit a slight amount of shininess we believe that off-theshelf ToF cameras can look around corners.
MIT Department
Massachusetts Institute of Technology. Media Laboratory
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1145/2836164
