A sparse representation method for determining the optimal illumination directions in Photometric Stereo

  • Authors:
  • Vasileios Argyriou;Stefanos Zafeiriou;Barbara Villarini;Maria Petrou

  • Affiliations:
  • -;-;-;-

  • Venue:
  • Signal Processing
  • Year:
  • 2013

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Abstract

The analysis of surface and texture details with the help of changes in illumination direction is a key task in 3D shape reconstruction either based on Photometric Stereo, Shape from Shading or Structured Light. This paper presents a novel approach for estimating the optimal illumination directions for the accurate calculation of the surface normals, while minimising the presence of shadows and the reconstructed albedo error. The method regards a sparse representation of the illumination arrangement and estimates the light directions using l"1 optimisation. The Lambertian model is considered and the theoretical development is demonstrated with experimental results.