REPARTI Seminars

The REPARTI Seminars at Université Laval are held on Fridays at 11:30 a.m.
Please see the program for more details.






Oct 15 2015 2:45PM

Yannick Hold-Geoffroy
Laboratoire LVSN
Dép. de génie électrique et de génie informatique, Université Laval

x-hour Outdoor Photometric Stereo


Photometric Stereo (PS) is a technique that recovers a scene structure from shading cues. While it has long been confined to the lab, there has been a recent interest in applying this technique to reconstruct outdoor objects and scenes. Unfortunately, the most successful outdoor PS techniques typically require gathering either months of data, or waiting for a particular time of the year. In this paper, we analyze the illumination requirements for single-day outdoor PS to yield stable normal reconstructions, and determine that these requirements are often available in much less than a full day. In particular, we show that the right set of conditions for stable PS solutions may be observed in the sky within short time intervals of just above one hour. This work provides, for the first time, a detailed analysis of the factors affecting the performance of x-hour outdoor photometric stereo.

Note: The seminar will be presented at 2:45 p.m. in room PLT-1122.


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