Profile issue - ProPhoto RGB vs ISO 22028-2 ROMM RGB
Hello! 😊
Recently I switched from Mac to Windows and I have always been under the impression that ProPhotoRGB is the same as ISO 22028-2 ROMM RGB. As my fresh Windows 10 Pro installation came without both profiles installed I copied the ProPhotoRGB.icm from my Mac and downloaded the ISO 22028-2 ROMM RGB.icc here: http://www.color.org/chardata/rgb/rommrgb.xalter
Whilst the ProPhotoRGB.icm (naturally) produces the same result on my Windows setup as it did on MacOSX, it's another story for the ISO 22028-2 ROMM RGB.icc. The colours are pretty much the same but the shadows are very flat and not even truely black.
The same region that produces values of 1 1 1 1 (red green blue luminance) are 3 3 3 3 with the "new" profile.
Am I using the wrong profile or have I been mislead and ProPhotoRGB is in fact NOT the same as ISO 22028? Or is the new version (22028-2) so different in its treatment of the black levels?
I'm looking at the files with a calibrated EIZO CG2730 (80cd, 5000K, Gamma 2.20).
Recently I switched from Mac to Windows and I have always been under the impression that ProPhotoRGB is the same as ISO 22028-2 ROMM RGB. As my fresh Windows 10 Pro installation came without both profiles installed I copied the ProPhotoRGB.icm from my Mac and downloaded the ISO 22028-2 ROMM RGB.icc here: http://www.color.org/chardata/rgb/rommrgb.xalter
Whilst the ProPhotoRGB.icm (naturally) produces the same result on my Windows setup as it did on MacOSX, it's another story for the ISO 22028-2 ROMM RGB.icc. The colours are pretty much the same but the shadows are very flat and not even truely black.
The same region that produces values of 1 1 1 1 (red green blue luminance) are 3 3 3 3 with the "new" profile.
Am I using the wrong profile or have I been mislead and ProPhotoRGB is in fact NOT the same as ISO 22028? Or is the new version (22028-2) so different in its treatment of the black levels?
I'm looking at the files with a calibrated EIZO CG2730 (80cd, 5000K, Gamma 2.20).
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I don't know the answer to your question but I'm curious, why would you use ISO 22028-2 ROMM RGB as opposed to ProPhotoRGB? 0 -
I used it because ProPhoto wasn't "there" until I copied it from my Mac.
The issue here is that ROMM and ProPhoto should be the same thing, but they're obviously not - or at least not to the extent as that they're interchangeable.
I'm unsure how to process and which profile to use/rely on for future work. Is ROMM really the same thing as ProPhoto?!
EDIT: It seems that ISO 22028-2 ROMM RGB is a specially modified version for printing purposes only - do NOT use this for editing images!!
Many people advise others to use this profile instead of ProPhoto but they really shouldn't do that, there are quite a lot of differences between them, especially the blackpoint compensation won't be the same and that affects the whole image.0
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