Attached shadow coding: Estimating surface normals from shadows under unknown reflectance and lighting conditions

@article{Okabe2009AttachedSC,
  title={Attached shadow coding: Estimating surface normals from shadows under unknown reflectance and lighting conditions},
  author={Takahiro Okabe and Imari Sato and Yoichi Sato},
  journal={2009 IEEE 12th International Conference on Computer Vision},
  year={2009},
  pages={1693-1700}
}
We present a novel technique, termed attached shadow coding, for estimating surface normals from shadows when the reflectance and lighting conditions are unknown. Our key idea is encoding surface points via attached shadows observed under different light source directions and then estimating surface normals on the basis of the similarity of the attached shadow codes. Because shadows do not rely on reflectance properties, our method is applicable to surfaces with various complex reflectances… CONTINUE READING
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