Header of text saying Perceptual Stuff

 

 

Changes in the blue bands produce changes in the gray even though the value of gray is the same, a simultaneous contrast effect.

 

Mach Band Illusion

 

The brighter bands at 45 and 135 degrees are illusory. Victor Vasarely used variants of this figure in his art, and they are wonderful to see.

 

Vassarelly Illusion

 

The black areas fade to white and lead to interesting subjective contours of bright, white lines.

 

Mach Band Extension

 

 

 

 

Mach Band Extension

 

 

 

Mach Band like figures can contribute to a Cafe Wall effect.
All lines are horizontal and parallel.

Mach Band Cafe Wall Illusion

 

 

The following figure has a motion effect that some have described as "flowing electricity". Watch out. Some people feel dizzy. Obviously, stop looking if this happens. The illusion combines Mach Bands and stripes that resemble the BBC illusion (as described, many years ago by MacKay).

 

Mach Band BBC Illusion

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