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
  booktitle =	 {Proceedings of the IEEE International Conference on
                  Computer Vision (ICCV)},
  publisher =	 {IEEE Computer Society Press},
  address =	 {Los Alamitos, USA},
  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 },