What Do the Sun and the Sky Tell Us About the Camera?

  title={What Do the Sun and the Sky Tell Us About the Camera?},
  author={Jean-François Lalonde and Srinivasa G. Narasimhan and Alexei A. Efros},
  journal={International Journal of Computer Vision},
As the main observed illuminant outdoors, the sky is a rich source of information about the scene. However, it is yet to be fully explored in computer vision because its appearance in an image depends on the sun position, weather conditions, photometric and geometric parameters of the camera, and the location of capture. In this paper, we analyze two sources of information available within the visible portion of the sky region: the sun position, and the sky appearance. By fitting a model of the… CONTINUE READING
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