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[ Source: pngquant  ]

Package: pngquant (2.5.0-2)

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PNG (Portable Network Graphics) image optimising utility

pngquant is a command-line conversion utility to quantize and dither truecolor PNG images, especially those with a full alpha channel, down to 8-bit (or smaller) RGBA-palette PNGs. Such images are usually two to four times smaller than the full 32-bit versions, and partial transparency is preserved quite nicely. This makes pngquant especially useful both for Web sites and for PlayStation 2 development, where one of the texture formats is RGBA-palette-based (though not PNG-compressed). This is the same technique used for many of the images on the Miscellaneous Transparent PNGs page (http://www.libpng.org/pub/png/pngs-img.html), and the results are often indistinguishable from the original, truecolor PNG images.

Optimizers (like pngcrush and optipng) optimize the compression, usually losslessly, while pngquant quantizes colors down to 256 (or fewer) distinct RGBA combinations, which is lossy.

Tags: Implemented in: C, User Interface: Command Line, Role: role::program, scope::utility, Purpose: Compressing, use::converting, works-with-format::png, Works with: Image, Raster Image

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Download pngquant

Download for all available architectures
Architecture Package Size Installed Size Files
alpha (unofficial port) 40.8 kB106.0 kB [list of files]
amd64 37.3 kB90.0 kB [list of files]
arm64 32.0 kB78.0 kB [list of files]
armel 36.2 kB89.0 kB [list of files]
armhf 32.0 kB65.0 kB [list of files]
hppa (unofficial port) 36.4 kB87.0 kB [list of files]
hurd-i386 37.8 kB89.0 kB [list of files]
i386 39.5 kB93.0 kB [list of files]
kfreebsd-amd64 37.2 kB90.0 kB [list of files]
kfreebsd-i386 39.4 kB93.0 kB [list of files]
m68k (unofficial port) 32.1 kB81.0 kB [list of files]
mips 37.8 kB94.0 kB [list of files]
mips64el 38.3 kB99.0 kB [list of files]
mipsel 38.2 kB94.0 kB [list of files]
powerpc 35.4 kB89.0 kB [list of files]
powerpcspe (unofficial port) 36.3 kB89.0 kB [list of files]
ppc64 (unofficial port) 36.1 kB155.0 kB [list of files]
ppc64el 36.3 kB154.0 kB [list of files]
s390x 36.5 kB98.0 kB [list of files]
sh4 (unofficial port) 38.8 kB77.0 kB [list of files]
sparc64 (unofficial port) 34.1 kB92.0 kB [list of files]
x32 (unofficial port) 36.7 kB86.0 kB [list of files]