On optimal light configurations in photometric stereo

Ondrej Drbohlav, Mike Chantler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

32 Citations (Scopus)

Abstract

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 s2, the optimal (minimum) uncertainty in the scaled normal is 3s2. For case of n > 3 lights, we show that the minimum uncertainty is 9s2/n, and identify sets of light configurations which reach this theoretical minimum. © 2005 IEEE.

Original languageEnglish
Title of host publicationProceedings - 10th IEEE International Conference on Computer Vision, ICCV 2005
Pages1707-1712
Number of pages6
VolumeII
DOIs
Publication statusPublished - 2005
EventProceedings - 10th IEEE International Conference on Computer Vision - Beijing, China
Duration: 17 Oct 200520 Oct 2005

Conference

ConferenceProceedings - 10th IEEE International Conference on Computer Vision
Abbreviated titleICCV 2005
CountryChina
CityBeijing
Period17/10/0520/10/05

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