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Related Experiment Video

Updated: May 9, 2026

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Adaptation to blurred and sharpened video.

Andrew M Haun¹, Eli Peli

¹Schepens Eye Research Institute, Massachusetts Eye & Ear, Harvard Medical School, Boston, MA, USA. andrew_haun@meei.harvard.edu

Journal of Vision

|July 17, 2013

Summary

This summary is machine-generated.

Visual adaptation to blur and sharpness is selective. Aftereffects are strongest when stimuli match the adaptation type, suggesting narrowband contrast adaptation underlies these visual perception changes.

Keywords:

1/f amplitude spectra blur adaptation contrast adaptation contrast enhancement contrast sensitivity individual differences

Related Experiment Videos

Last Updated: May 9, 2026

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Area of Science:

Vision science
Perceptual psychology
Computational neuroscience

Background:

The human visual system can perceive varying degrees of image blur and sharpness.
Sensory adaptation modifies perception, making adapted states appear neutral.

Purpose of the Study:

To investigate the selectivity of visual adaptation to blur and sharpness using dynamic stimuli.
To determine if adaptation effects generalize across different image types and temporal variations.

Main Methods:

Participants adapted to specific levels of blur or sharpness using movie video clips.
Matching functions were measured to quantify perceptual shifts after adaptation.
Stimuli varied in spatiotemporal content to test the robustness of adaptation effects.

Main Results:

Blur adaptation induced a sharpening aftereffect, most pronounced for blurry stimuli.
Sharpness adaptation induced a blurring aftereffect, strongest for sharp stimuli.
Adaptation effects were comparable to studies using static images, despite stimulus variability.

Conclusions:

Visual adaptation to blur and sharpness is selective, not general.
These findings support a model where adaptation is a consequence of narrowband contrast adaptation.
The visual system's response to blur and sharpness is dynamically modulated by recent exposure.