Lessons Related to Color Perception
title | description | rating | post date | author | |
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Positive Afterimages |
This lesson contains a short explanation of positive afterimages and some suggestions on how best to see them. When light shines on the retina, chemical and electrical signals are sent to the brain, providing the basis for our sense of vision. When the light is turned... |
4 Average: 4 (20 votes) |
8-May-13 | guy | |
Yang and Yin - negative afterimages |
This lesson provides a tutorial on the mechanism behind negative afterimages, and includes three afterimage illusions for demonstration. Lecture slides are attached with all images. For more examples of optical illusions caused by visual desensitization, check out our... |
3.666665 Average: 3.7 (6 votes) |
8-May-13 | guy | |
Cheshire Cat Illusions |
Cheshire cat illusions are images that fade slowly away as you stare at them. They result from desensitization in the eye (and brain) when you view them without moving your eyes. This lesson explains the mechanism behind the disappearance, and provides several examples of... |
3.57143 Average: 3.6 (7 votes) |
8-May-13 | guy | |
Shades of Inhibition - Optical Illusions with Lateral Inhibition |
Look carefully at the optical illusion in figure 7. The green cylinder appears to cast a shadow across the checkerboard. However, the shades of the squares are not what they appear to be. Photoreceptors in the human retina are wired to the brain in such a way as to emphasize... |
3.75 Average: 3.8 (4 votes) |
8-May-13 | guy |