Illumination, Shading and the Perception of Local Orientation

@article{Mamassian1996IlluminationSA,
  title={Illumination, Shading and the Perception of Local Orientation},
  author={Pascal Mamassian and Daniel Kersten},
  journal={Vision Research},
  year={1996},
  volume={36},
  pages={2351-2367}
}
We investigated the perception of local surface orientation on a simple smooth object, under several different illumination conditions. The perceived local orientation was determined for several points on the surface and quantified as slant and tilt of the local tangent plane. We found an underestimation of the perceived slant and a larger variance for the perceived tilt than for the perceived slant. We found also that subjects were less biased at estimating the surface orientation when the… CONTINUE READING
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