Adobe RGB and Prophoto RGB interventions

I want to apply the same tonal intervention on two copy of the same image, the first in Prophoro RGB and the second converted in Adobe RGB.To apply the same tonal interventions I have to keep in account the different gamma (1.8 vs 2.2)?
For example, if in the adobe rgb version I apply a one point curve (input 128 output 172), can I apply the same input/output curve to the prophoto version or shoul I calculate the corresponding tonal values in gamma 1.8 encoding?
Thank you
Marco

What's the point of the exercise? Is there any reason why using color management tools that are currently in place (Convert to Profile) would not work?

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DNG converter converts RAW Adobe RGB color profile to ProPhoto ??

I have a Canon 5D2. there is an internal switch to shoot RAW files using the Adobe RGB profile. when I open a RAW image in CS4, there is no problem. yet when I open the DNG converted image in CS4, CS4 tells me the image has the ProPhoto color profile. I can convert back to Adobe RGB, but it adds an extra step and (I think probably) loses information. I looked for a switch in the DNG converter to speciy the color profile of the converted image, but could not find it. Any suggestions ?

Hi, Tom.
The real issue here is getting accurate color. You can't get accurate color by setting your monitor profile to sRGB. sRGB is a virtual color space that doesn't describe the exact color gamut of any physical device. But, in order to display sRGB or any color space accurately, you need to get a characterization of your monitor.
Here is an AWESOME way to get access to a colorimeter: http://www.lensrentals.com/rent/pantone-huey-colorimeter Looks like for $32 you can rent this for a week. Go in on this with a friend and profile both of your monitors and hardly pay a thing. If you have a reasonably good quality LCD monitor, this custom profile you make will be fairly accurate for many months. At the very least, this is way more accurate than having no regular calibration at all.
Hope this helps!
Bret

PROPHOTO RGB versus ADOBE RGB-should they look the same?

satisfied with editing an image in LR, I then opened it into CS5 and converted it's profile to adobe rgb, the are marj=kedly different in color,tone,brightness, etc.
i use imac,8GB ram 27" display, os 10.6.6 and I use eye one to calibrate my monitor once per month. LR 3,3 and Photoshop CS5.
searched forums and found nothing i could clearly understand. The prophoto rgb version of image is bright and cheerful but adobe rgb version is dull but probably more accurate.
am prepared for humility so how about some advice

Bob_Peters,
you are absolutely correct.
i just read about the uses if the "assign" and "convert" variations. i will read them again.
a little humility is a fair price to unscramble thoughts.
thanks, again,
vince

ProPhoto RGB Conversions to Adobe RGB or sRGB

With Lightroom using ProPhoto RGB with a 1.8 gamma, what happens to the image on the monitor when converting to either Adobe RGB or sRGB whose gamma is 2.2? Are the image colors simply remapped?

Simple answer, yes..._IF_ you have an accurate profile of your display, Lightroom will use that to correctly display the image on screen. That's a double edged sword though, if you DON'T have an accurate profile of your display, the image on screen won't be accurate.
And yeah, forget about the relationship of "working space" (an image's RGB specs) and your display's "profile". There is none-other than the fact that a color manged apps will display the image's color space correctly with an accurate profile.
Did I mention it's really important to have an accurate display profile?
:~)

Color mgt and prophoto rgb

I have been told that lots of printers cant "read" adobe rgb. I have a canon p9000 which reads adobe rgb great. If I send files to the printer in prophoto rgb, will the printer be able to interpret them?
Should I first create a tiff or jpg with adobe rgb and then send it to the printer?
Please advise.
Andy

Well, the mathematician in me can't help but analyze this ;-)
Assuming you've been printing for 20 years, that's 1,000,000 per year, which comes to about 2,740 prints per day (every day). Assuming you sleep 8 hrs per night, leaving 16 hours minus potty breaks, eating, whatnot, say you print for 10 hours, that's 274 prints per hour or 4.5 prints per minute or about one print per 15 seconds.
Man... you got to get a life!

RAW output to an adobe rgb and srgb look identical in bridge but different in PS on wide gamut monitor.

Photoshop CS6. Wide gamut HP LP2475w monitor. Spider 3 Elite calibrated. Working space adobe rgb. When outputting a raw to Adobe RGB jpg it looks a bit whacked with color blotches/jumps in PS. The sRGB of it does not. BUT......in bridge they look identical. The adobe rgb jpg almost acts like viewing an image in a non-color aware browser on a wide gamut monitor. Like bridge shows it right but photoshop is showing it whacked out. I can't tell what is lying to me and if there is even a problem with the image. Here is a half second 2 frame gif alternating between the two from a screen cap. http://www.extremeinstability.com/hmm.gif Abrupt blotchy color changes with the adobe rgb when viewed in photoshop. And again, when you look at the two images in bridge they don't show that, they look identical.
Thanks,
Mike

I guess I now learned that Bridge only generates srgb previews. So I see them the same in there I guess. Looks like it comes down to the adobe space and jpg. Oddly enough an 8 bit adobe tiff covers it fine without breaking up. Can see the 3 on this gif. http://www.extremeinstability.com/3.gif

Photoshop in Adobe RGB 16 bit don't fill a layer with paint bucket and a color 35.40.35.100.

I create a new file in RGB profile Adobe RGB 16bit
take the paint bucket and fill the layer with a color created by selector with the following parameters 35.40.35.100 CMYK and RGB corresponds to 24.20.18 the result is a full level of color 76.73.63.9 but in RGB corresponds to 24.20.18 because the values in cmyk not match ??

Could you please post screenshots (with the pertinent Panels visible) to illustrate the issue?
Are you not aware that you cannot reliably define a CMYK color in RGB because the transformation is performed through the Profile Connection Space (Lab) and depends on the involved Color Spaces/ICC profiles (edited) and the Color Settings?

IPhoto 5 and Adobe RGB - RGB 1998

Dear fellow members,
1. I've been using iPhoto 5 for a couple of years and haven't questionned about this version <<compatible>> with Adobe RGB (RGB 1998). I understand that the sRGB is already an embedded profile of iPhoto 5, but is Adobe RGB embedded either?
The reason I ask this question is because I wish to work in Adobe RGB, from my new digital still camera, to my other post-processing softwares [from Adobe and Phase One manufacturers].
I understand that Adobe RGB offers some more tonalities and color spectrum, this is the reason why I wish to move from sRGB to Adobe RGB.
2. If I wish to publish photos on the web, I should be careful about exporting in sRGB for a broader audience, though.
But does iPhoto knows it automatically, I'm not sure, however, I can try to convert to sRGB in Preview.app and compare...
3. Looking at pictures on a browser, Safari, or Firefox also differs: Safari manages Adobe RGB, but not Firefox
(see e.g. http://www.gballard.net/psd/golive_pageprofile/embeddedJPEGprofiles.html) .
4. From what I've learnt, I also had to recalibrate my Ti667 screen from the Apple preset 1.8 to Gamma 2.2.
5. Finally what does Generic RGB mean in the OS X system?
Thank you for your comments and responses.
Best Regards.

Mr. Scuttles:
1 - It depends on what camera you're using as to the profile used. Canon cameras use a profile titled Camera RGB. It's an RGB profile that is very similar to the other RGBs except for the Adobe. The Adobe has a wider gamut (range) of colors. If your camera embeds Adobe when you shoot then you don't have to do anything.
2 - If you edit in iPhoto the modified version will retain its Adobe RGB profile. So if you plan on using the photos on the web and want to use sRGB you will have to embed that profile with a 3rd party application. I've modified a ColorSync Applescript to do that. You can download it from Toad's Cellar. It's much faster than using Preview as it can do batches of photos at one time. Just drop the files or a folder of file on it and let it do it's stuff. It's a lossless process. It's a tad slow however, but does a very good job.
5 - See this Technical document for the Generic RGB and Apple RGB differences: http://developer.apple.com/qa/qa2005/qa1430.html
If you open the ColorSync Utility application (in the Applications/Utilities folder) you can view and compare the various profiles.
Do you Twango?

I am using PS cs6 and lightroom and I am having a hard time know what color space to choose. The lab that I am using told me that their color space is sRGB. Do I need to have both PS and Lightroom set at sRGB or should I have PS set at adobe RGB and jus

I am using PS cs6 and lightroom and I am having a hard time know what color space to choose. The lab that I am using told me that their color space is sRGB. Do I need to have both PS and Lightroom set at sRGB or should I have PS set at adobe RGB and just set my export from lightroom as sRGB?

Please post in the Photoshop forum.
http://forums.adobe.com/community/photoshop
Bob

Colormanagment between Photoshop CS5 and Lightroom 5, Adobe RGB

Hello,
In Photoshop CS5 are the Colours, Brightness diffrent to Lightroom 5 as you can see in this picture:
https://dl.dropboxusercontent.com/u/33568224/Bildschirmfoto%202014-10-21%20um%2023.45.16.p ng
My settings in the colormanagment in PS is Adobe RGB and Europa pre-press 3. But even when i switch to other options the picture isn't changing. I guess there is the Problem, it seems that it don't react on my adjustments:
here are my settings
https://dl.dropboxusercontent.com/u/33568224/Bildschirmfoto%202014-10-21%20um%2023.54.40.p ng
and here the same picture with complitly wild settings ;-) (the preview is activated)
https://dl.dropboxusercontent.com/u/33568224/Bildschirmfoto%202014-10-21%20um%2023.55.17.p ng
can anybody help me out with that?
Thank you very much
Stefan

And to directly answer your question, you don’t inform Adobe, you merely deactivate PS, reimage, then reinstall and reactivate PS with the serial number(s), and relicense LR with the serial number(s).
If this computer isn’t yours and you don’t have the serial numbers, yourself, then that could be a problem, although there may be software that can find the serial numbers. On a PC platform, download and run the Belarc Security Advisor and see if it finds the serial numbers you need. It’ll only find the current product serial numbers, not the prior versions that an upgrade might be based on, so then you’ll be stuck.

MPB 17" and what Adobe RGB color space coverage I might expect from it

Hello,
I am photographer and currently PC user. However, I plan to dive to the Mac’s world.
Before I become a Mac user, I have few questions.
Now I think about MacBook Pro 17”, i7 2.66MHz, 8GB RAM, 500 GB 7200rpm HDD and antiglare screen.
I plan to use additional monitor for photo editing.
I did search on google about *NVIDIA GeForce GT 330M* and *Adobe RGB color space* it covers, however, it gave me no results related to Mac. The only information about this card and Adobe colors I found is that Sony Vaio use this graphic card and in some forums, one say it covers 98% and in other 100% of Adobe color space which made me wonder what type of screen Vaio have.
- is MacBook Pro 17” good for photo editing?
- what % of AdobeRGB color space I might expect from it on my external screen or what % of sRGB colors space it delivers?
- Is it possible to calibrate Mac’s native screen and external one, use both at the time and have different profiles on each?
- Tell me anything that would stop me thinking about MBP for photo editing?
Thank you for your time reading this and hope to find the answers here.

You should consider posting your questions in the Pro Application section for Aperture. You will bump into more photographers there than you will here. But I will make an attempt at answers:
whats about Adobe color space?
No, the MBP screen will not encompass the Adobe Color Space. In fact, few desktop monitors are capable of this.
does the native MBP screen display full color range the video card is able to produce...
There really is no limit to the color extremes, which define a color space, as established by a graphics card. So your question is not a well formed question. An old ATI Rage card with 8-bit output would reveal the same color gamut as would the NVIDIA GeForce GT 330M connected to the same display. The gamut is determined by the attached display, not the graphics card.
...or connecting external monitor to it’s mini display port would bring much wider color range to my eyes?
Yes, certainly the potential for that exists. Notebook screens are usually a compromise and can't be expected to compete with a high-end desktop display in many categories, including color gamut. But whether it would bring a "much wider color range to" your eyes is hard to say. It depends on what type of external display is in use.

Adobe RGB and SRGB don't match!

I realized I have been editing in Adobe RGB and the color settings as "Optimize for printing". I need to switch it to Srgb (which defaults to "Optimize for computer screens". When I do this though, all my RAW files look washed out and dull compared to before and also when compared to what they look like in-camera. I tried uninstalling and reinstalling, and the same thing happens. I also talked to the tech people where I bought my computer and they said it's not anything wrong with the monitor or pc. Anyone know whats going on?

Hi,
This is because the gamut of Adobe RGB is greater than SRGB.
Have you try to use the Image -> Convert Color Profile -> Convert To sRGB Profile
For info look at: Photoshop Elements Help | Setting up color management

Color Spaces CIE and Adobe RGB

Looking at monitor specs, usually, the color space of the monitor is given in terms of a target color space, like 96% Adobe RGB. Some give several, but along comes Dell, u2412, and they supply one: 82% CIE.
I know what CIE is, but making a guesstimate from the Dell spec requires more than what I presently know about such matters.
So, what are the expectations? Is that a meaningful spec for comparison sake? IOW, how much does Adobe RGB enclose CIE 1976?
TIA
Lawrence

I went back to here:
http://forums.adobe.com/thread/916368?start=0&tstart=0
and ran some of those checks with the various presentations. Also, embarrassingly, I did know about the site but failed to go back when I looked for any test results for the 2412.
sic transit Gloria!
I also generated a step tablet in PS, as well as doing several calibration reruns. I did a calibration in "Standard"ode and one in "Custom" where I had access to RGB controls.
TFT Central did the same and claimed that the Custom was more troublesome and didn't yield any significant improvement. I beg to differ!
Also, they made available the results of the Standard and Custom as an ICC profile for users and I defy anyone to tell me there is no significant difference. Between my two calibrations and TFT's, I have 4 flavors from which to choose. Wow! I'm impressed (NOT!)
At any rate I settled on using my custom version as it shows the most neutral gray. It also showed the smaller dE both average and max deviation, 0.34 and 1.2 respectively, the only one exceeding 1.0. It also was close to the factory default than the others.
What a way to run a railroad!
The other fussbudget item is X-Rite. I doesn't like calibrating LCD. It manages to skip over steps along the way, and if I hadn't the experience and expectations step to step with my crt, I would probably be returning the Dell at this time. The differences from the data pov between my Custom and Average should be barely visible, but in fact, it is visually significant. Normal conclusions would hold the monitor at fault.
Off to contact X-Rite.
Lawrence

Color management: Adobe RGB 1998 issues in print module

When printing to a JPEG file from the Print Module, I've noticed that the "Adobe RGB" profile differs substantially from the "Adobe RGB (1998)" profile supplied with Windows.
When viewed with Photoshop, the "Adobe RGB" images are much more saturated than the image previews from the Lightroom window. Photoshop displays the same "Adobe RGB (1998)" profile for both files.
I have tried to reinstall Lightroom, but this has not solved the problem.
It seems that when selecting "Adobe RGB", Lightroom is in fact converting the image to sRGB, but embeds the "Adobe RGB (1998)" profile.
ICC profile selection: http://julianchoquette.com/fichiers/forum/lightroom-color-a.png
This will output files that look like the previews in Lightroom: http://julianchoquette.com/fichiers/forum/lightroom-color-b.png
Profile selection pop-up: http://julianchoquette.com/fichiers/forum/lightroom-color-c.png

Yeah that is completely different. My guess is that this is the bug I mentioned before. It should not happen but clearly does. It works normally on my system (I just tried again).
>Note that both dialogs do not display exactly the same name for the Lightroom provided Adobe RGB profile. http://julianchoquette.com/fichiers/forum/lightroom-export-dialog.png
That's normal and doesn't mean anything. On my computer it actually says "AdobeRGB" without the (1998) that yours shows but I believe that's simply a difference between the Mac and PC version. You can try whether it does the same thing if you select prophoto. But somebody with Vista x64 and LR 2.3 should try the same thing to see if this is a bug specific to the PC version of LR.

Soft Proofing with Adobe RGB

I am experimenting with soft proofing various sunset images. The problem I'm seeing when I soft proof the images in Photoshop using the Adobe RGB profile is that the oranges and magentas in the sunset turn yellowish. Can someone please explain why this is happening. I admit that some of these images are coming from the internet and have no embedded profile. I have always thought that the Adobe RGB profile had a larger color space so I'm not sure why I'm getting the obvious changes in the sunset colors when switching between sRGB and Adobe RGB.

With a standard monitor everything you see on screen is already soft proofed to sRGB. That's all it can reproduce. So soft proofing to Adobe RGB makes no sense. It's beyond the monitor's capabilities.
Even if you have a wide gamut monitor soft proofing to Adobe RGB makes no sense. You'd need a monitor that reproduced considerably more than Adobe RGB (which doesn't exist), and a file in an even larger space such as ProPhoto.
If you see a difference, you have "Preserve RGB numbers" checked in Proof Setup (which you normally shouldn't). This is the proof equivalent of Assign Profile - IOW how it will look if you assign Adobe RGB as opposed to Convert to Profile, which is what you normally do and which will preserve color appearance.
The other possible explanation is a rather evasive bug in Photoshop, reported from time to time. Sometimes people see a color shift when converting to the very same profile as the file already is. I can't reproduce that, so I can't give any more details.

Adobe RGB and Prophoto RGB interventions

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