sRGB back to Adobe RGB

twisted pixels wrote in post #3345618
Hi all!
I have shot some jpeg's with 20D set to sRGB can I change them to Adobe RGB? or is it too late.
Thanks.
Tony.

What the BIG DEAL - copy the folder of originals and then convert to ADOBE RGB - sell them what they want, and move on, that's what I say.

Thank you everyone for your advice and knowledge. At least now I can make an informed decision, as now I know my options. Thanks once again for your time.
Regards,Tony.

PacAce wrote in post #3347672
Remapping colors going from sRGB to Adobe RGB shouldn't be a problem because all the sRGB colors should be present in the Adobe RGB color space. It's when you go from a larger to a smaller gamut where perceptual rendering can becomes a "problem" due to possible color shifts.

True. But what I meant was this: If you take a look at the image on this page explaining Perceptual intent, it will work the same way the other way around: Colors "at the edge" of sRGB gamut will end up "at the edge" of AdobeRGB...
(That's why Relative Colorimetric should be used if you want accurate colors when going from a smaller to a larger space)

PacAce wrote in post #3350886
Then can you point out what those colors are that sRGB has that's not in the Adobe color space? I'm looking at both color spaces simultaneously from all angles and I can't find any sRGB color that goes outside the color gamut of the Adobe RGB color space. The Adobe RGB color space completely engulf the sRGB color space as far as I can see.

My humble appologies....
After rereading my source 3 or 4 times to answer your question, I discovered my confusion. The source was indicating that ...at lower luminance aRGB does not extend as far "beyond" as sRGB....

René Damkot wrote in post #3351879
True. But what I meant was this: If you take a look at the image on this page explaining Perceptual intent, it will work the same way the other way around: Colors "at the edge" of sRGB gamut will end up "at the edge" of AdobeRGB...
(That's why Relative Colorimetric should be used if you want accurate colors when going from a smaller to a larger space)

I don't think so, René. If you convert the sRGB color space to the Adobe RGB color space, you're not going to get the edge of the sRGB color going to the edge of the Adobe RGB. It's going to end up exactly where the sRGB color maps to in the Adobe RGB color space because that color is availble in the Adobe RGB color space. The only time you get the compression is if you go from a wider to a narrower gamut, not the other way around.

I don't think you'll ever see a color shift when you go from sRGB to Adobe RGB. You'll only see if you go from Adobe RGB to sRGB and the image has out of gamut colors (relative to sRGB).

Though all of the discussion is pertinent in the larger sense,.

The answer to the OP's question is "yes"
And there is no reason not to do it if the client wants it.
PSCS will convert the files... and no "destruction" will take place.

Select "image", then "mode" from the drop down, then "convert to profile" from the next drop down menu.

A window will open, the top info shows the current working profile of the image, below that you can select the "destination space" or the profile you want to convert to.
Select Adobe RGB.. and your done.

Or the client could set their machine to ignore profile and open with their chosen profile. As the colour space has been compressed, it seems rather pointless to drop it into the larger colour space, but if that keeps your relationship with the client happy, that's what you have to do.

Graham

blue_max wrote in post #3356749
Or the client could set their machine to ignore profile and open with their chosen profile. As the colour space has been compressed, it seems rather pointless to drop it into the larger colour space, but if that keeps your relationship with the client happy, that's what you have to do.

Ignoring the profile is generally a really bad idea.

PacAce wrote in post #3355988
I don't think so, René. If you convert the sRGB color space to the Adobe RGB color space, you're not going to get the edge of the sRGB color going to the edge of the Adobe RGB. It's going to end up exactly where the sRGB color maps to in the Adobe RGB color space because that color is availble in the Adobe RGB color space. The only time you get the compression is if you go from a wider to a narrower gamut, not the other way around.

I don't think you'll ever see a color shift when you go from sRGB to Adobe RGB. You'll only see if you go from Adobe RGB to sRGB and the image has out of gamut colors (relative to sRGB).

Gave it a try, and it turns out I was very wrong indeed... Sorry about that.

What I don't understand then, is the page I linked to stating "perceptual can be reversed".

Allthough they do state: "This is not to say that converting from space A to B and then back to A again using perceptual will reproduce the original; this would require careful use of tone curves to reverse the color compression caused by the conversion." So I guess that's quite a bit of tone curves then

What I am quite certain about, is that when you are going from a larger to a smaller color space using Perceptual, colors will be compressed, regardless wether they are out of gamut or not: The entire range of the color space is compressed to fit in the target space. At least, that's my understanding of it. But I have been wrong before...

Learned something new again

René Damkot wrote in post #3357456
Gave it a try, and it turns out I was very wrong indeed... Sorry about that.

What I don't understand then, is the page I linked to stating "perceptual can be reversed".

Allthough they do state: "This is not to say that converting from space A to B and then back to A again using perceptual will reproduce the original; this would require careful use of tone curves to reverse the color compression caused by the conversion." So I guess that's quite a bit of tone curves then

What I am quite certain about, is that when you are going from a larger to a smaller color space using Perceptual, colors will be compressed, regardless wether they are out of gamut or not: The entire range of the color space is compressed to fit in the target space. At least, that's my understanding of it. But I have been wrong before...

Learned something new again

Yes, you're very right about that, René. I shouldn't have qualified the last statement in my previous post with the part about the out of gamut colors. I'm so used to thinking "relative colorimetric" that I just type that qualifier in automatically.