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Author Topic: Reds after J2k conversion  (Read 1782 times)

hdvprojection

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Reds after J2k conversion
« on: May 17, 2016, 04:43:39 PM »
Has anyone else noticed a particular weakness in JPEG2000 with the color red? Maybe I'm imagining it, but whenever I have a spot or slide with an abundance of red (especially with a different color text overlay), I'm pretty much forced to max out the image bandwidth to avoid compression artifacts. I'd prefer to stick with OpenDCP's default 125MB/s, partly because of network bandwidth limitations, but the slides and ads with red are killing that. Any thoughts or experiences with this?

darklover

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Re: Reds after J2k conversion
« Reply #1 on: May 18, 2016, 03:25:18 AM »
hi hdvprojection,
send us a exemple (like a tiff image in DCI resolution) and I'll try to encode it with many encoders and profiles.
Anyway i never noticed this probleme with red.  But in certain case some jpeg2000 encoder like kakadu can generate some noise in picture, and in rare case  in high bitrate crash the a doremi player. (exemple of a complicated image composition with many many details).

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Re: Reds after J2k conversion
« Reply #1 on: May 18, 2016, 03:25:18 AM »