||JPEG2000: the Killer Image File Format for Lossless Storage|
|How does lossless JPEG2000 compare to PNG in terms of compression? As far as I was aware, PNG acheives a rather good (lossless) compression ratio, and is rather more widely-supported than JPEG2000. PNG (http://www.libpng.org/pub/png/) also supports alpha channels (but not layers).|
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