portable network graphics

pngcrush - PNG optimizer utility in openSUSE

(via www.susegeek.com)

pngcrush is an optimizer tool for PNG (Portable Network graphic) files. pngcrush is an excellent batch-mode compression utility for PNG images. Depending on the application that created the original PNGs, it can improve the file size anywhere from a few percent to 40% or more (completely losslessly)

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