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Seeing structure: Shape skeletons modulate perceived similarity.

Adam S Lowet1, Chaz Firestone1,2, Brian J Scholl3

  • 1Department of Psychology, Yale University, Box 208205, New Haven, CT, 06520-8205, USA.

Attention, Perception & Psychophysics
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Summary
This summary is machine-generated.

Visual similarity perception relies on shape skeletons, not just surface features. Our study shows that changes to an object's skeleton significantly impact how easily we perceive differences, even more than surface-level alterations.

Keywords:
Medial axisShape skeletonsVisual similarity

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Area of Science:

  • Cognitive Science
  • Computer Vision
  • Neuroscience

Background:

  • Visual perception involves comparing objects for similarity.
  • Objects need a common representational format for comparison.
  • Shape skeletons, representing underlying organization, are a candidate format.

Purpose of the Study:

  • To investigate if shape skeletons mediate visual similarity perception.
  • To determine the importance of skeletal structure versus superficial features in visual comparison.
  • To explore the role of shape skeletons in downstream visual processing.

Main Methods:

  • Participants performed a same/different task with shapes.
  • Shapes varied in skeletal structure or superficial features.
  • The study included 2D line drawings and 3D volumes.

Main Results:

  • Discrimination was better for skeletally dissimilar shapes.
  • Large surface differences were overlooked if skeletons remained similar.
  • This effect generalized from 2D drawings to 3D objects.

Conclusions:

  • Shape skeletons are crucial for perceiving visual similarity.
  • Skeletal organization influences downstream visual processing.
  • Human visual systems may compute and utilize shape skeletons.