You can do it like this with ImageMagick on the command line. This will quantize...

		sorghum on Jan 7, 2012 \| parent \| context \| favorite \| on: Color Thief, script for grabbing the color palette... You can do it like this with ImageMagick on the command line. This will quantize the image to 8 colors and list them in descending order of occurance: `convert image.jpg -resize 400x400 -format %c -dither None -quantize LAB -colors 8 -depth 8 histogram:info:- \| sort -r`

Sorting should be done with sort -r -n -t :