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Dithering is a color reproduction technique in which dots or pixels are arranged in such a way that allows us to perceive more colors than are actually used. This method of "creating" a large color palette with a limited set of colors is often used in computer images, television and the printing industry.  

The graphic illustrations below show how a full color image can been approximated by using only a few colors. As magnification is increased, see how each color seen is broken down to a combination of the primary colors used in the dither pattern.

Clown, original Clown, black and white
Original Image Grey Image
Clown, 100% scale Clown, 200% scale
Dithered Image at 100% scale 200% scale
Clown, 400% scale Clown, 800% scale
400% scale 800% scale
Back to Optical Illusions

Other Illusions:
Blind Spots
Blink Effect
Chromatic Adaptation
Chromatic Adaptation
Color Blindness
Dither Dots
Fill Patterns
Opponent After-images
Optical Art
Shape Contrast
Simultaneous Contrast
Simultaneous Contrast
Value Contrast

Other fun stuff:
Free 3D Screensavers
Color Playground
Dimensions of Color
3D Color Puzzle

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