A Caltech Library Service

Turning Corners into Cameras: Principles and Methods

Bouman, Katherine L. and Ye, Vickie and Yedidia, Adam B. and Durand, Fredo and Wornell, Gregory W. and Torralba, Antonio and Freeman, William T. (2017) Turning Corners into Cameras: Principles and Methods. In: 2017 IEEE International Conference on Computer Vision (ICCV). IEEE , Piscataway, NJ, pp. 2289-2297. ISBN 9781538610329.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


We show that walls, and other obstructions with edges, can be exploited as naturally-occurring “cameras” that reveal the hidden scenes beyond them. In particular, we demonstrate methods for using the subtle spatio-temporal radiance variations that arise on the ground at the base of a wall's edge to construct a one-dimensional video of the hidden scene behind the wall. The resulting technique can be used for a variety of applications in diverse physical settings. From standard RGB video recordings, we use edge cameras to recover 1-D videos that reveal the number and trajectories of people moving in an occluded scene. We further show that adjacent wall edges, such as those that arise in the case of an open doorway, yield a stereo camera from which the 2-D location of hidden, moving objects can be recovered. We demonstrate our technique in a number of indoor and outdoor environments involving varied floor surfaces and illumination conditions.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Bouman, Katherine L.0000-0003-0077-4367
Freeman, William T.0000-0002-2231-7995
Additional Information:© 2017 IEEE. This work was supported in part by the DARPA REVEAL Program under contract No. HR0011-16-C-0030, NSF Grant 1212849, Shell Research, and an NDSEG Fellowship (to ABY). We thank Yoav Schechner, Jeff Shapiro, Franco Wang, and Vivek Goyal for helpful discussions.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)HR0011-16-C-0030
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Record Number:CaltechAUTHORS:20190404-161219288
Persistent URL:
Official Citation:K. L. Bouman et al., "Turning Corners into Cameras: Principles and Methods," 2017 IEEE International Conference on Computer Vision (ICCV), Venice, 2017, pp. 2289-2297. doi: 10.1109/ICCV.2017.249
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94482
Deposited By: George Porter
Deposited On:05 Apr 2019 16:01
Last Modified:16 Nov 2021 17:05

Repository Staff Only: item control page