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pngquant is a command-line utility to quantize and dither 32-bit RGBA
PNGs down to 8-bit (or smaller) RGBA-palette PNGs, usually with a
significant reduction in file size (40-70% smaller than 24-bit PNGs).
This unique type of PNG supports full alpha transparency and is
compatible with all modern web browsers, and has better fallback in IE6
than 24-bit PNGs.
Features:
- High-quality palette generation using modernized Median Cut
algorithm.
- Unique dithering algorithm that adds less noise to images than the
standard Floyd-Steinberg.
- Easy to integrate with shell scripts, GUIs and server-side software.
- Fast mode for processing large numbers of images.
WWW: http://pngquant.org/
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