Using motor tasks to quantitatively judge 3-D surface curvatures.

@article{Watanabe1999UsingMT,
  title={Using motor tasks to quantitatively judge 3-D surface curvatures.},
  author={Hisao Watanabe and Frank E. Pollick and Jan J. Koenderink and Mitsuo Kawato},
  journal={Perception & psychophysics},
  year={1999},
  volume={61 6},
  pages={
          1116-39
        }
}
The primary objective of this study was to quantitatively investigate the human perception of surface curvature by using virtual surfaces and motor tasks along with data analysis methods to estimate surface curvature from drawing movements. Three psychophysical experiments were conducted. In Experiment 1, we looked at subjects' sensitivity to the curvature of a curve lying on a surface and changes in the curvature as defined by Euler's formula, which relates maximum and minimum principal… CONTINUE READING
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