@inproceedings{Drbohlav-ICCV05-1,
IS = { zkontrolovano 27 Jan 2009 },
UPDATE  = { 2008-12-29 },
author =	 {Drbohlav, Ond{\v r}ej and Chantler, Mike},
title =	 {On Optimal Light Configurations in Photometric
Stereo},
booktitle =	 {Proceedings of the IEEE International Conference on
Computer Vision (ICCV)},
publisher =	 {IEEE Computer Society Press},
isbn =	 {0-7695-2334-X},
book_pages =	 {1876},
editor =	 {Ma, Songde and Shum, Heung-Yeung},
volume =	 {II},
pages =	 {1707-1712},
year =         {2005},
annote = { This paper develops new theory for the optimal placement
of photometric stereo lighting in the presence of camera noise. We
show that for three lights, any triplet of orthogonal light
directions minimises the uncertainty in scaled normal
computation. The assumptions are that the camera noise is additive
and normally distributed, and uncertainty is defined as the
expectation of squared distance of scaled normal to the ground
truth. If the camera noise is of zero mean and variance $\sigma^2$
, the optimal (minimum) uncertainty in the scaled normal is
$3\sigma^2$ . For case of $n > 3$ lights, we show that the minimum
uncertainty is $9\sigma^2/n$, and identify sets of light
configurations which reach this theoretical minimum. },
project     = { UK_Photex },
}