Hello all !
Here is my problem :
Photoshop is set to use sRGB workspace (in edit/colors.../workspace/RVB).
If I understand correctly this is how all native windows applications work.
This means Photoshop and the other applications should display the same colors on a file with a sRGB profile.
Now this is the case until I calibrate my monitor.
When I do, Photoshop colors become different from the other applications (irfanview, explorer, browsers...).
The only way I found to let everything display the same colors is to set Photoshop to use Proofing/RVB Monitor.
What upsets me even more is that Photoshop colors look "better" to me (dark grays seem to dark to me in the other applications.)
I have read that this is because Photoshop takes the new profile into account and others applications do not. But I don't think this is relevant here because everything is in sRGB so the only profile is my monitor's and I think calibration is handled globally by windows : everything (including browsers, explorer, and Photoshop) changes color if I choose to apply the monitor's profile or not with windows color management tool ("use my parameters for this device").
Here is my system configuration :
- Photoshop CS4 (11.0.2)
- Windows 7 64 bits
- HP ZR2440W and DELL 2209WA (these are not wide gamut screens)
I have spent two days trying to figure the logics behind this and really am upset. Any help would be greatly appreciated. Don't hesitate to ask me if there is something that is unclear or some information I forgot to mention.
Thanks in advance,
I think you have grasped the concept:
An image’s profile determines how a certain combination or RGB-values is supposed to appear and Photoshop uses the monitor profile to determine what values it needs to pass on to get that appearance or an approximation on the screen.
If you softproof with the monitor profile you are effectively circumventing Color Management and the RGB-values are desplayed directly, so to speak.
Sorry I didn't get it. Actually my problem is there are things I don't understand
I thought windows was handling monitor calibration, not Photoshop.
But it appears Photoshop does something when I apply (with windows) my monitor profile. What it does and why, this I don't understand.
>> I thought windows was handling monitor calibration, not Photoshop.
Nope. Windows doesn't do anything to correct colors for your display. There is no global calibration.
WIndows provides the display profile to applications that are interested in using it, and loads the LUT from the profile into your video card (that does the most minimal "calibration").
It's up to the application to use the display profile correctly and convert document colors to display colors.
And right now only some professional applications and a few browsers do that (but not all browsers).
Thanks for that answer.
If I understand correctly there is still a global calibration, done by the video card ? I mean I do see a global change when I apply my profile.
So even if Photoshop is doing the calibration on its own, what it does should still match what the video card does (as soon as everything is in sRGB), and using monitor sRGB proof colors shouldn't be needed, or did I miss something ?
Photoshop (CMS) reads an embedded ICC profile and CONVERTS it to the custom monitor profile for a theoretical 'true color' display -- nonmanaged apps generally only pass the RGB information straight through to the monitor unaltered
when Photoshop is configured to ignore or not use a document profile, Photoshop ASSIGNS (for all practical purposes) its Working Profile/Space and then CONVERTS it to the custom monitor profile -- if the Assigned source profile is wrong, Photoshop displays wrong, but it can easily be corrected by Assigning the correct profile
Photoshop already displays sRGB in theoretical 'true color' so View> Proof Setup: sRGB can be confusing
for me, View> Proof Setup: Monitor RGB is much more useful as an enlightening tool...
Gator soup, you should really try to use proper and accurate terminology.
Photoshop transforms color values from documents to devices based on the color profiles that describe the two.
Photoshop has a menu in which you can convert the color values from one document profile to another. There's some relationship between the two, but if you use the word "convert" to describe what happens to colors on the way to a monitor I suspect you'll just confuse people.
And experience has shown us that a complete understanding of color-management cannot be taught via forum posts.
Aaah, ok, I get it now. I thought you said windows did nothing at all, when actually what you said was that what it does is very basic.
So what you say is the differences in color I see are between poor calibration and proper calibration.
Still I'm surprised the difference is so big. There might be a way to make sure this is where the difference comes from ?
That sounds like an invitation to continue to talk about the issue. Fair enough.
I'm not sure where you're getting "insecurity"... I am just trying to help you help others more effectively.
I invite you to re-read just the first sentence of what you wrote very carefully, putting yourself in the shoes of someone struggling with both the terminology and the concepts:
Photoshop (CMS) reads an embedded ICC profile and CONVERTS it to the custom monitor profile for a theoretical 'true color' display
If ever there is a time to pick words carefully, it's in a color-management discussion.
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