Perception of local orientation from shaded images.

  title={Perception of local orientation from shaded images.},
  author={Peter Triantafillou and Hisao Watanabe and Mitsuo Kawato},
  journal={Perception & psychophysics},
  volume={58 5},
The perception of local orientation from shaded images was examined. In Experiment 1, subjects viewed a boundaryless Gaussian hill and judged local orientation using both a gauge figure and a pointing method. One subject reported an internally consistent surface which was incompatible with the judged light-source direction and model used to generate the image. The remaining subjects reported a surface similar to the generating one, and analysis of their results indicated a contour of zero… CONTINUE READING

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