Shape from shading. I: Surface curvature and orientation.

@article{Johnston1994ShapeFS,
  title={Shape from shading. I: Surface curvature and orientation.},
  author={Alan P Johnston and P J Passmore},
  journal={Perception},
  year={1994},
  volume={23 2},
  pages={169-89}
}
The human visual system makes effective use of shading alone in recovering the shape of objects. Pictures of sculptures are readily interpreted--a situation where shading provides virtually the sole cue to shape. However, shading has been considered a poor cue to depth in comparison with retinal disparity and kinetic cues. Curvature discrimination thresholds were measured with the use of a surface-alignment task for a range of surface curvatures from 0.16 cm-1 to 1.06 cm-1. Weber fractions were… CONTINUE READING

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