Object surface recovery using a multi-light photometric stereo technique

Sun, J., Smith, M., Smith, L., Midha, S. and Bamber, J. (2007) Object surface recovery using a multi-light photometric stereo technique. Image and Vision Computing, 25 (7). pp. 1050-1057. ISSN 0262-8856

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Publisher's URL: http://dx.doi.org/10.1016/j.imavis.2006.04.025

Abstract

This paper presents a new multi-light source photometric stereo system for reconstructing images of various characteristics of non-Lambertian rough surfaces with widely varying texture and specularity. Compared to the traditional three-light photometric stereo method, extra lights are employed using a hierarchical selection strategy to eliminate the effects of shadows and specularities, and to make the system more robust. We also show that six lights is the minimum needed in order to apply photometric stereo to the entire visible surface of any convex object. Experiments on synthetic and real scenes demonstrate that the proposed method can extract surface reflectance and orientation effectively, even in the presence of strong shadows and highlights. Hence, the method offers advantages in the recovery of dichromatic surfaces possessing rough texture or deeply relieved topographic features, with applications in reverse engineering and industrial surface inspection. Experimental results are presented in the paper.

Item Type:Article
Uncontrolled Keywords:photometric stereo, specular reflection, shadows, surface reflectance, surface orientation, height map, linear least-squares solution
Faculty/Department:Faculty of Environment and Technology > Department of Engineering Design and Mathematics
ID Code:11997
Deposited By: Dr J. Sun
Deposited On:27 Sep 2010 11:28
Last Modified:22 May 2014 14:12

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