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# 11-Sep-05 amo Date-of-Birth
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# use gimp to load *.jpg and export to *.png
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http://www.ee.surrey.ac.uk/FAQ/standards.html
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http://www.libpng.org/pub/png/
http://www.w3.org/Graphics/PNG/
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convert cmyk.jpg -matte -clip -channel opacity opacity.pgm
composite -compose CopyOpacity opacity.pgm cmyk.jpg -matte -quality 95 rgba.png
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