(No CMYK Color support) The colors of large image shift towards blue/green

jurplel / qView

Practical and minimal image viewer

https://interversehq.com/qview/

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(No CMYK Color support) The colors of large image shift towards blue/green #657

Open destroy314 opened 10 months ago

destroy314 commented 10 months ago

Environment:

OS: macOS 14.2.1 (23C71) with Apple XDR Display (P3-1600 nits)
qView version: 6.1

Information: The left is the Preview.app, please note the file size in the title bar, this behavior is also found in large tif/psd files I have. Change color space conversion has nothing to do with it. 2024-01-10_22-29-40 2024-01-10_22-28-06

jurplel commented 10 months ago

Interesting. Can you send the test images so I could reproduce it in the future?

destroy314 commented 10 months ago

Oops, I forgot. GoogelDrive

jdpurcell commented 6 months ago

This is because the image uses CMYK color and Qt wasn't capable of handling it properly until recently. There were two recent changes (here and here), one or both of which has fixed the colors when I try this and other CMYK images in a Qt preview release. The bad news - I don't believe this is being cherry-picked back to Qt 6.7, in which case we'll have to wait until Qt 6.8 is released towards the end of the year.

jurplel commented 5 months ago

IMO another case for investigating a migration away from qt image processing