Eggs illusion: Local shape deformation generated by a grid pattern.

Area of Science:

• Visual Perception
• Psychophysics
• Computational Neuroscience

Background:

• Visual illusions provide insights into the brain's perceptual processing.
• Understanding how the brain interprets visual stimuli is crucial for fields like human-computer interaction and artificial intelligence.

Purpose of the Study:

• To introduce and characterize a novel visual shape illusion, termed the "eggs illusion."
• To investigate the factors influencing the perception of illusory deformation in the eggs illusion.
• To explore potential underlying neural mechanisms by comparing the eggs illusion with known visual phenomena.

Main Methods:

• Utilized a matching method to quantify the perceived deformation in the eggs illusion.
• Conducted experiments varying grid luminance, patch size, and local grid orientation.
• Employed circular and elliptical patches to determine conditions for cancelling or weakening the illusion.

Main Results:

• The eggs illusion is significantly affected by grid luminance and patch size.
• Illusory deformation is dependent on the local orientation of the grid.
• The eggs illusion shares characteristics with the scintillating grid illusion, suggesting similar processing mechanisms.

Conclusions:

• Grid luminance, patch size, and local grid orientation are key factors in the eggs illusion.
• The eggs illusion may share underlying neural mechanisms with the scintillating grid illusion.
• Orientation processing plays a significant role in the generation of the eggs illusion.