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Comment by Keyframe | Hacker News Reader

JPEG 2000 is not used much

There's one big win though. Digital cinema projectors, in now pretty much all theatres, run DCPs which have movies encoded with it.

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We used it to compress scanned PDFs, using mixed raster techniques. Since the PDF natively supports JPEG2000 we used it for document background compression and we used JBIG2 for text image compression. The compression ratio was impressive but the document rendering was noticeably slower even with Adobe reader …

>background compression and we used JBIG2 for text image compression

Are you aware of the downsides?

https://www.dkriesel.com/en/blog/2013/0802_xerox-workcentres...

It stands to reason that not only Xerox had problems with JBIG2.

Thank you for the link, yes we are aware of this particular issue. For our engine we used only lossless mode and using this mode the decompressed binary image is identical to the original so the described problem cannot occur. Nonetheless this limit severely the usefulness of JBIG2.

Adding to the list: ESA's Sentinel 2 products (granules/tiles) in are typically distributed in JPEG2000 format. Anyone working with this imagery has probably experienced all the trouble associated with extracting and transforming it into a more useful format.

NASA's Solar Dynamics Observatory Atmospheric Imaging Assembly telescopes are available from various NASA and ESA servers as JPEG2000. The java software JHelioviewer (http://www.jhelioviewer.org/) displays these 4k*4K JPEG2000 files with opengl acceleration at high frame rates and it is beautiful.

macOS and iOS have always supported JPEG2000.

Red Camera ripped off JPEG2000 to create its codec; now they extort every other camera vendor that wants to do compressed raw, thanks to the bullshit patent they were able to acquire on it.

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