- This topic has 5 replies, 3 voices, and was last updated 1 year, 3 months ago by
.
-
Posts
-
Greetings,
After calibrating my monitor (DELL U2723QE – see attached Report) colors are still not quite accurate.
Can anyone help me with the process?
Please let me know if you want more information
Thank you in advance,
Sav
Can you describe “not quite accurate”? Are you seeing a color tint?
Did you use the right spectral correction/offsets?
I am comparing printed RAL color fans with their official digital equivalent.
To be exact, 90% of the colors are off mostly by brightness. If I lower their brightness they are close to the original. There are colors that they are off by tint ( e.g they are more yellow than orange). I also tried creating a 3DLut file( not sure about the correct settings either but I tried many). I load it to Photoshop and some colors were still off.
I hope I explain my situation accurately.Regarding the Spectral corrections, I didn’t find any by default. Neither by searching in colorimetercorrections.displaycal.net (see attached file). I use the spyder x2 Ultra and the corrections are for the spyder5.
Thank you,
Sav
A widegamut monitor must be used in color managed apps, it’s likely that this is a WLED PFS p3 display.
Comparisons with physical / printer copy and monitor must be done with normalized light.
Then match white & brightness to the light envoroment used for evaluation. First try numerical approach, then you may need little tweaks due to light source innacuracies to true D65 or 50 or whatever illuminant it simulates, or statistical deviations between you and standard observers.You you need:
-a good light source close to whatever illuminant is simulating
-match brightness & white, then calibrate & profile to that target
-show color patches color managed.Deviations in spectralpower distribution of the light source from its reference will produce errors to, maybe correctable by HSL 6 axis layer… but it usually is not monitor of your visual system fault but light source’s
First of all, I want to thank you for taking the time and sharing your knowledge with me.
My light source is supposed to be 6500K but irregularities are possible of course.
Attached you will find a photograph that represents the differences between the printed RAL fan and the digital equivalent . It’s better in real life (there is some gloss in the photo) and this is the closest I’ve managed to achieve. I also tweaked the gamma from nvidia panel to achieve this result. I know this may be wrong, but it kinda worked.
If you have any other idea, please share it with me.
Thank you again,
Sav
Windows Photo viewer is not (or was not) color managed. Also it will requiere that image is tagged with a profile.
“6500K” to label a light souce says nothing about its spectral power distribution.
Light to eyes => you can use only color coordinates (and 6500 is not that)
light to object => reflect => to eyes => you need spectral power distribution information.
If this is not clear to you read about illuminants or matameric failures. English wikipedia may get you a first approximation.From capture I’d say that you are using a non color managed software or one that does not support your current display profile. Use single curve + matrix a s displaycal profile type for improved compatibility. This is because the oversaturation on screen vs color cards
