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+--- Thread: Problems with colour profiles while exporting (/Thread-Problems-with-colour-profiles-while-exporting)
Problems with colour profiles while exporting - ape - 12-23-2021
Hey,
I have some problems with exporting an image as png/jpg such that the colours are displayed consistently.
I already made a post in graphicdesign.stackexchange here:
https://graphicdesign.stackexchange.com/questions/155213/why-are-some-colors-shown-as-one-in-some-display-programs
But I couldn't resolve my issue with the answer provided there and I think I need some more direct feedback.
Here the gist of the problem:
the attached image does not have consistent colour displays over different image display programs. On some it looks correct. On some (like my chrome browser of my Pixel-phone) the reddish colours are distorted so that the orange and red footer of the image appears in one red colour for example.
I tried to convert and assign the colour profiles sRGB_v4_ICC_preference.icc and sRGB_ICC_v4_Appearance.icc from https://color.org/srgbprofiles.xalter. It was quite an erratic process and I'm very confused now as to how to proceed further.
I guess I really need you help, as I have tried a lot already on my own.
RE: Problems with colour profiles while exporting - Ofnuts - 12-23-2021
I don't trust any smartphone display/photo app for color correctness. These things don't care about accuracy but only about looks, so they typoically push contrast and saturatiuon. In addition they have to work with varying screen luminosity and ambient lighting.
In practice, if I put the "good" picture in Gimp and push the saturation, I get the bad image (especially the missing orange strip and the pink blotch on the left that turns red) (Colors > Saturation, "Scale" to 1.25).
RE: Problems with colour profiles while exporting - ape - 12-23-2021
Hmm... I am not sure if I should be satisfied with that though. I'm sorry but I think that there has to be a way where the images look remotely similar (the correct view and the incorrect view).
The way this image is displayed is just too coherent within two groups:
(+) On Firefox it looks good (but firefox is also known for ignoring color profiles (https://photo.stackexchange.com/questions/124356/pictures-uploaded-to-facebook-display-wrong-colors-but-only-in-firefox/124357#124357)
(+) In Shotwell Viewer it also looks good
(-) In Gnu Image viewer it looks bad
(-) In Chrome it looks bad as well (desktop and mobile)
I am counting on some error I do while exporting the image.
I could link my poster.xcf or anything if this would help
RE: Problems with colour profiles while exporting - Ofnuts - 12-23-2021
(12-23-2021, 12:57 PM)ape Wrote: Hmm... I am not sure if I should be satisfied with that though. I'm sorry but I think that there has to be a way where the images look remotely similar (the correct view and the incorrect view).
The way this image is displayed is just too coherent within two groups:
(+) On Firefox it looks good (but firefox is also known for ignoring color profiles (https://photo.stackexchange.com/questions/124356/pictures-uploaded-to-facebook-display-wrong-colors-but-only-in-firefox/124357#124357)
(+) In Shotwell Viewer it also looks good
(-) In Gnu Image viewer it looks bad
(-) In Chrome it looks bad as well (desktop and mobile)
I am counting on some error I do while exporting the image.
I could link my poster.xcf or anything if this would help
For me, the image looks good (visible orange strip) in all I tried:
Linux:
- Gimp
- Firefox
- Chromium
- Gwenview
- Okular
- Inkscape
- ImageMagick display
- Luminance
- RawTherapee
- Signal App
- Thumbnails in Dolphin (yes, they can be made big enough to check)
- Preview pane in Dolphin
- Gallery
- File manager (possibly same back-end as Gallery)
- Signal app
- Google browser (Chrome?)
- DuckDuckGo Browser
- Opera
RE: Problems with colour profiles while exporting - ape - 12-23-2021
Wow, okok Ofnuts. Thanks for that investigation : -) really impressive
and actually quite good news for me.
But I still have another question for after the holidays.
I don't accept any answers during christmas
I'm a little surprised that there is no embedded colour profile. I think I ticked it in the exporting prompt.
I did another export where I only saved the colour profile and did run exiftool on it.
If I am not mistaken the output says that there is an embedded colour profile, right?
exiftool -ICC_Profile:all poster_forExport.jpg
Profile CMM Type : Little CMS
Profile Version : 4.3.0
Profile Class : Display Device Profile
Color Space Data : RGB
Profile Connection Space : XYZ
Profile Date Time : 2021:12:23 22:10:42
Profile File Signature : acsp
Primary Platform : Apple Computer Inc.
CMM Flags : Not Embedded, Independent
Device Manufacturer :
Device Model :
Device Attributes : Reflective, Glossy, Positive, Color
Rendering Intent : Perceptual
Connection Space Illuminant : 0.9642 1 0.82491
Profile Creator : Little CMS
Profile ID : 0
Profile Description : GIMP built-in sRGB
Profile Copyright : Public Domain
Media White Point : 0.9642 1 0.82491
Chromatic Adaptation : 1.04788 0.02292 -0.05022 0.02959 0.99048 -0.01707 -0.00925 0.01508 0.75168
Red Matrix Column : 0.43604 0.22249 0.01392
Blue Matrix Column : 0.14305 0.06061 0.71393
Green Matrix Column : 0.38512 0.7169 0.09706
Red Tone Reproduction Curve : (Binary data 32 bytes, use -b option to extract)
Green Tone Reproduction Curve : (Binary data 32 bytes, use -b option to extract)
Blue Tone Reproduction Curve : (Binary data 32 bytes, use -b option to extract)
Chromaticity Channels : 3
Chromaticity Colorant : Unknown (0)
Chromaticity Channel 1 : 0.64 0.33002
Chromaticity Channel 2 : 0.3 0.60001
Chromaticity Channel 3 : 0.15001 0.06
Device Mfg Desc : GIMP
Device Model Desc : sRGB