Chessboard Illusion
The Chessboard Illusion is an optical illusion that was first published by Edward H. Adelson in 1995. It depicts a checkerboard with light and dark squares, partly shadowed by another object. The optical illusion is that the area labeled A appears to be a darker color than the area labeled B. However, within the context of the two-dimensional image, they are of identical brightness, i.e., they would be printed with identical mixtures of ink, or displayed on a screen with pixels of identical color.
The chessboard illusion or checker shadow illusion makes squares with identical brightness, which are partly shaded by a green cylinder, appear like a checkerboard with dark and light squares. This optical illusion was developed by Edward Adelson in 1995, an MIT professor. Adelson’s checker shadow illusion exhibits the human visual perception on the lightness or reflectance of surfaces. Specifically, the identical squares are perceived as having different shades due to simultaneous lightness contrast. This illusory effect points out that we may falsely interpret stimuli due to lighting conditions and previous sensory experience.
The Chessboard Illusion is caused by the way our brains interpret visual information. When we see a shadow, our brains automatically assume that the object casting the shadow is darker than the object being shadowed. In the Chessboard Illusion, the shadow is cast by a cylinder that is partially blocking the checkerboard. Our brains interpret this as meaning that the area of the checkerboard that is being shadowed is darker than the area that is not being shadowed. However, this is not actually the case. Both areas of the checkerboard are the same color.
The Chessboard Illusion is a powerful example of how our brains can be fooled by visual information. It is also a reminder that our perception of the world is not always accurate.
Definition
The Chessboard Illusion is an optical illusion that causes the area labeled A to appear darker than the area labeled B, even though they are actually the same color.
History
The Chessboard Illusion was first published by Edward H. Adelson in 1995. It was created as part of a study on lightness constancy, which is the ability of our brains to perceive objects as having the same brightness regardless of their lighting conditions.
Characteristics
The Chessboard Illusion is characterized by the following features:
- The area labeled A appears darker than the area labeled B, even though they are actually the same color.
- The illusion is caused by the way our brains interpret visual information.
- The illusion is a powerful example of how our perception of the world can be fooled.
Sources
- Adelson, E. H. (1995). The checker shadow illusion. Perception, 24(1), 29-34.
- https://en.wikipedia.org/wiki/Checker_shadow_illusion
- https://www.youtube.com/watch?v=hEYbugJsIcU
- https://www.youtube.com/watch?v=GALLMJxLvgA
- https://ar.wikipedia.org/wiki/%D8%AE%D8%AF%D8%B9%D8%A9_%D8%B1%D9%82%D8%B9%D8%A9_%D8%A7%D9%84%D8%B4%D8%B7%D