Photometric stereo with an arbitrary number of illuminants

Authors:
Vasileios Argyriou;Maria Petrou;Svetlana Barsky
Affiliations:
Communications and Signal Processing Group, Electrical and Electronic Engineering Department, Imperial College London, London SW7 2AZ, UK;Communications and Signal Processing Group, Electrical and Electronic Engineering Department, Imperial College London, London SW7 2AZ, UK;Communications and Signal Processing Group, Electrical and Electronic Engineering Department, Imperial College London, London SW7 2AZ, UK
Venue:
Computer Vision and Image Understanding
Year:
2010

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Abstract

We present an optimal generalisation of the 4-light photometric stereo technique for an arbitrary number of Q illuminants. We assume that the surface reflectance can be approximated by the Lambertian model plus a specular reflection. The algorithm works in a recursive manner eliminating the pixel intensities affected by shadows or highlights, based on a least squares error technique, retaining only the information coming from illumination directions that can be used for photometric stereo reconstruction of the normal of the corresponding surface patch. We report results for both simulated and real surfaces and compare them with the results of other state of the art photometric stereo algorithms.