Calibrating a Non-isotropic Near Point Light Source Using a Plane

  title={Calibrating a Non-isotropic Near Point Light Source Using a Plane},
  author={Jaesik Park and Sudipta N. Sinha and Yasuyuki Matsushita and Yu-Wing Tai and In-So Kweon},
  journal={2014 IEEE Conference on Computer Vision and Pattern Recognition},
We show that a non-isotropic near point light source rigidly attached to a camera can be calibrated using multiple images of a weakly textured planar scene. We prove that if the radiant intensity distribution (RID) of a light source is radially symmetric with respect to its dominant direction, then the shading observed on a Lambertian scene plane is bilaterally symmetric with respect to a 2D line on the plane. The symmetry axis detected in an image provides a linear constraint for estimating… CONTINUE READING
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