Examining the uncertainty of the recovered surface normal in three light photometric stereo

Sun, J. (2007) Examining the uncertainty of the recovered surface normal in three light photometric stereo. Image and Vision Computing , 25 (7). pp. 1073-1079. ISSN 0262-8856 Available from: http://eprints.uwe.ac.uk/11996

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Publisher's URL: http://dx.doi.org/doi:10.1016/j.imavis.2006.04.024


Although the three light photometric stereo technique has been used in many applications, there is little published work concerned with characterizing the uncertainty of these systems due to the involvement of a number of complicating factors. This paper presents a methodology used to analyze the uncertainty of the recovered unit surface normal with respect to irradiance variance. Illumination configurations and the values of the composite albedo are found to directly affect the stability of the photometric stereo technique. An orthogonally distributed illumination arrangement is proven to be the theoretically optimal configuration. Further practical considerations are also identified. The derived general uncertainty expression can be easily employed to optimize the location of the light sources. Hence, the work is of significance for the development of practical industrial applications of photometric stereo, including metrology, reverse engineering and various surface inspection tasks.

Item Type:Article
Uncontrolled Keywords:photometric stereo, illumination configuration, uncertainty, surface normal
Faculty/Department:Faculty of Environment and Technology > Department of Engineering Design and Mathematics
ID Code:11996
Deposited By: Dr J. Sun
Deposited On:27 Sep 2010 11:21
Last Modified:05 Apr 2016 22:36

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