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Glossiness perception and its pupillary response.

Hideki Tamura1, Shigeki Nakauchi1, Tetsuto Minami1

  • 1Department of Computer Science and Engineering, Toyohashi University of Technology, Toyohashi, Aichi, Japan.

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|April 5, 2024
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Summary
This summary is machine-generated.

Glossiness perception influences pupil size, with higher glossiness ratings causing greater pupil constriction. This suggests illusory brightness from glossy objects, like specular highlights, affects pupillary responses.

Keywords:
Glossiness perceptionPupillary responseSpecular highlightSpecular reflection

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Area of Science:

  • Visual perception
  • Neuroscience
  • Psychophysics

Background:

  • Pupillary responses are known to change based on perceptual factors like subjective brightness and luminance.
  • The specific impact of glossiness perception on pupillary responses is not well understood.

Purpose of the Study:

  • To investigate the relationship between glossiness perception and pupillary response.
  • To determine if perceived glossiness affects pupil diameter.

Main Methods:

  • A glossiness rating experiment was conducted, recording pupil diameter.
  • Stimuli included original and shuffled object images with matched luminance histograms.
  • Participants rated perceived glossiness of stimuli presented for 3,000 ms.

Main Results:

  • Images rated as more glossy led to greater pupil constriction.
  • Pupil diameter changes were significantly predicted by glossiness rating, image category, luminance histogram variance, and stimulus area.
  • Higher glossiness ratings correlated with increased pupil constriction.

Conclusions:

  • Perceived glossiness, particularly from specular highlights, can induce pupil constriction.
  • Illusory brightness associated with high-glossiness objects influences pupillary light reflex.
  • This study elucidates a novel link between surface properties perception and autonomic responses.