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ICCV
2005
IEEE

On Optimal Light Configurations in Photometric Stereo

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On Optimal Light Configurations in Photometric Stereo
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 2 , the optimal (minimum) uncertainty in the scaled normal is 32 . For case of n > 3 lights, we show that the minimum uncertainty is 92 /n, and identify sets of light configurations which reach this theoretical minimum.
Ondrej Drbohlav, Mike J. Chantler
Added 15 Oct 2009
Updated 15 Oct 2009
Type Conference
Year 2005
Where ICCV
Authors Ondrej Drbohlav, Mike J. Chantler
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