Color Quantization of Photographic Images III: Palette from Colors out of a ColorSlider
Color quantization reduces the number of colors in an image to a limited set of distinct colors, called a palette.
This Demonstration illustrates how a photographic image can be quantized using colors from Mathematica's built-in function ColorSlider.
We start with black and white, and up to eight additional colors from the ColorSlider can be added to the palette and used in the quantization.
Select a color from the slider, click "add" and repeat up to eight times. Use the "remove" button to undo. The "reset" button returns the black-and-white starting image.
The eight most frequent colors in the original are displayed at the bottom left. The "optimize" button uses these dominant colors (plus black and white for added contrast) as the palette for the quantization.