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If We See a German Shepherd Standing Thirty Feet from Us

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If we see a German shepherd standing thirty feet from us, we still recognize its size even though the image on our retina is much smaller than if the dog was directly in front of us. This is primarily due to


Definitions:

Jnd

The smallest difference in stimulus intensity that a specific sense (like vision or hearing) can detect, also known as the just-noticeable difference.

Relative Luminance

A measure of the amount of light that is emitted, reflected, transmitted, or viewed from a surface, adjusted for its perceived brightness to the human eye.

Brightness Constancy

The human visual system's ability to perceive objects as having a constant brightness even when the lighting conditions change.

Moon Illusion

An optical illusion in which the moon seems bigger when observed near the horizon compared to when viewed higher in the sky.

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