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Visualizing Visual Adaptation
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Adaptation and visual discomfort from flicker.

Sanae Yoshimoto1, Fang Jiang2, Tatsuto Takeuchi3

  • 1Graduate School of Integrated Arts and Sciences, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima, Hiroshima 739-8521, Japan.

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|May 16, 2019
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Summary
This summary is machine-generated.

Visual discomfort from flickering patterns depends on both amplitude and phase spectra. Adaptation alters perceived focus but uniquely impacts discomfort, highlighting distinct processing pathways for visual perception and discomfort.

Keywords:
AdaptationAmplitude spectrumFlickerPhase spectrumTemporal frequencyVisual discomfort

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Area of Science:

  • Visual perception
  • Computational neuroscience
  • Image processing

Background:

  • Unnatural amplitude spectra in spatial images cause discomfort.
  • Temporal flicker discomfort is influenced by phase spectra.
  • Adaptation effects on visual perception are well-documented.

Purpose of the Study:

  • Investigate how adaptation to different amplitude and phase spectra affects discomfort in temporal flicker.
  • Examine the relationship between perceived temporal focus and discomfort.
  • Determine the role of phase spectra in visual discomfort.

Main Methods:

  • Participants adapted to temporal flicker with varying amplitude and phase spectra (square wave or random phase).
  • Adapting and test stimuli were filtered to create sharpened or blurred amplitude spectra.
  • Participants rated discomfort and perceived sharpness/blur of test flicker.

Main Results:

  • Adaptation shifted perceived temporal focus towards sharpened or blurred characteristics.
  • Discomfort ratings changed differently for square wave and random phase flicker post-adaptation.
  • Exposure to adapting stimuli generally increased perceived discomfort.

Conclusions:

  • Perceived temporal focus and visual discomfort are dissociated, suggesting distinct underlying neural processes.
  • The phase spectrum plays a crucial role in determining visual discomfort from flickering patterns.
  • Adaptation influences the perception of temporal characteristics and discomfort in distinct ways.