See also Improved pngquant and GUI for it.
Improvements
- Removed optimizations that sacrificed quality — new version is 2× slower, but produces much better results.
- Better handling of alpha channel when remapping and dithering — very transparent areas are smoother.
- Added special handling of alpha channel in a few places — transparent areas of the image get less colors, leaving more for opaque areas.
- Color reduction is done on gamma-corrected colors — dark and bright colors appear to be distributed evenly.
- Added soft floyd-steinberg dithering — images with gradients appear smoother, but without too much noise.
Download
Version 0.9, January 2009.
Binary for Mac OS X (Universal, 10.4 or newer)
Run it from Terminal:
/path/to/pngnq /path/to/file.png(you can use drag'n'drop instead of typing paths)GUI for Mac OS X (Universal, 10.5)
Source code (all platforms)
Example images
Mouse over images to see them on dark background.
pngnq 0.6 (old) | pngnq 0.9 (new) | |
|---|---|---|
| Globe Fish Bowl 128 colors | ||
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| Lena + alpha channel 128 colors | ||
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pngquant 1.1.1 | pngnq 0.9 (new) | |
|---|---|---|
| Lena with alpha channel 128 colors dithered | ||
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