Convert To Profile (DCI-P3 D65 Gamut With sRGB Transfer)

[leosantare]

Hello,

Is there a way to convert an image with a sRGB IEC61966-2.1 color profile to a DCI-P3 D65 Gamut With sRGB Transfer color profile? When I go to select a profile to convert to, it's not an available option as seen in the screenshot below. Is there a way to extract the DCI-P3 D65 Gamut With sRGB Transfer color profile from an image I have and then be able to use it when converting other images?

90% of my photos have the DCI-P3 D65 Gamut With sRGB Transfer color profile as seen in the screenshot below. I would like to convert my other photos so it says EXACTLY the same thing for the document profile. This is mainly me wanted everything exactly the same and not really making a difference otherwise. However, this is very important to me.

Thank you,

[D Fosse]

That's the characteristics of Apple's default "Display" profile (P3 primaries, sRGB tone curve, D65 white point).

Display P3 is basically a monitor profile, it is not a document profile. Used as a monitor profile, it will be reasonably ballpark right for the new generation of P3-type wide gamut displays - but if you want color accurate display, you need to use a calibrator.

Adobe installs an "Image P3" profile for use on document level which is very similar, but I think it has a D50 white point. Which doesn't really matter because the white point will be remapped to the target white point.

If you're trying to do this because you have a P3 display and use applications that don't support color management, then I suppose this is one way around that, but I would strictly consider this on a case by case basis. Remember, it will only look acceptable on your display, on other displays all bets are off.

[NB, colourmanagement]

@leosantare Just so we can help, why would you wish to do that? What is the use for the converted images? 

For extracting a profile from an image you may find a solution here: https://rawpedia.rawtherapee.com/How_to_extract_and_examine_ICC_profiles

I hope this helps neil barstow, colourmanagement net - adobe forum volunteer - co-author: 'getting colour right' google me "neil barstow colourmanagement" for lots of free articles on colour management Help others by clicking "Correct Answer" if the question is answered. Found the answer elsewhere? Share it here. "Upvote" is for useful posts.

[leosantare]

Hello,

Thanks for your help. As I already explained, 90% of my pictures have the DCI-P3 D65 Gamut With sRGB Transfer color profile. These are all pictures taken from from Samsung Galaxy. Moving forward, I will continue taking pictures with my Samsung Galaxy and therefore all my pictures will continue having the DCI-P3 D65 Gamut With sRGB Transfer color profile.

Like I said, I have a few old pictures that have the sRGB IEC61966-2.1 color profile. I wiish to convert these over to the DCI-P3 D65 Gamut With sRGB Transfer color profile so all my pictures will have the same color profile. It's that simple. 

I am able to convert all my pictures with the DCI-P3 D65 Gamut With sRGB Transfer color profile to sRGB IEC61966-2.1 if I want. This will result in all my pictures having the same profile. However, I would have to convert all my pictures moving forward. I would rather just convert the few old one I have and then not have to convert moving forward.

I disagree, DCI-P3 D65 Gamut With sRGB Transfer is a document profile. It says so right in photoshop and I provided a screenshot. Either way, I wish to make an image state DCI-P3 D65 Gamut With sRGB Transfer instead of sRGB IEC61966-2.1.

[leosantare]

Please let me know. Thank you

[D Fosse]

Photoshop allows you to use any RGB profile as document profile. Even any random monitor profile or printer profile. That doesn't mean you should do it.

The document profile should always be a standard profile. That's how color management is intended to work. Standard profiles are sRGB IEC61966-2.1, Adobe RGB or ProPhoto. Lately we need to include Display P3 in that list, simply because so many Mac users do it. But Display P3 was still originally specified and intended as a default system monitor profile in MacOS.

A profile with the name "DCI-P3 D65 Gamut With sRGB Transfer" is not a standard profile.

If you're still set on using this profile, get a Mac user to send it to you. It will be installed by MacOS. Display P3 has P3 primaries, sRGB tone curve, and a D65 white point.

There is no particular advantage to using Display P3 as document profile. There is however a distinct danger in doing it, particularly if that profile is also set up as the system monitor profile. That means you are working without color management. It will look good on any other system set up the same way - but you can quickly get into trouble if you move outside that bubble.

[davescm · Accepted solution]

'I disagree, DCI-P3 D65 Gamut With sRGB Transfer is a document profile. It says so right in photoshop...'

Photoshop is stating the the current document profile is 'DCI-P3 Gamut with sRGB transfer'. It is not saying that the profile is a standard document profile. DCI-P3 was developed for the film industry, although as you have found, some consumer electronics such as phones do use it or its Display P3 variation.

If you are determined to convert, and I would not as an image converted from sRGB does not gain any colours when converted to the wider colour space, a Display P3 profile can be downloaded from here : https://www.color.org/chardata/rgb/DisplayP3.xalter

Bear in mind though, that if you post images on the web, the safest way is to export and convert at the export stage to sRGB. That way, users are more likely to see what you see.

Dave

[D Fosse]

I can imagine one very minor advantage of using P3 as document profile, if, and only if! you have a P3 monitor: it's always nice to know that all the colors in your file can be reproduced on screen. If you have any clipping in your file, you can assess the effect visually and directly.

Not, of course, that it's required in any way. First of all, the difference between Adobe RGB and P3 is negligible in terms of gamut. It's mainly a matter of the green primary being shifted slightly sideways. I doubt that it's possible to see any difference between the P3 green primary and the same hue at max saturation in Adobe RGB - considering that these highly saturated colors are not really perceived as "natural" colors by the eye, you tend to see them all as artificial "neon" colors beyond a certain saturation level.

Secondly, the obvious point: people are happily using ProPhoto on all kinds of monitors.

In short, P3 didn't solve any problems, there weren't any. The DCI-P3 specification was adapted to digital cinema projector technology. It has no particular historical relevance to monitor technology or digital images or photography in general.

[leosantare]

Okay, thanks for letting me know that it's not a standard profile. Basically, there is no way to to convert it to DCI-P3 Gamut with sRGB transfer inside photoshop by default. I will just convert my picture with DCI-P3 Gamut with sRGB transfer to sRGB then.

[davescm]

As explained above, the display P3 profile I linked has DCI-P3 gamut and an sRGB transfer curve.

Dave

Dave

[NB, colourmanagement]

@leosantare "As I already explained, 90% of my pictures have the DCI-P3 D65 Gamut With sRGB Transfer color profile. These are all pictures taken from from Samsung Galaxy. Moving forward, I will continue taking pictures with my Samsung Galaxy and therefore all my pictures will continue having the DCI-P3 D65 Gamut With sRGB Transfer color profile.

Like I said, I have a few old pictures that have the sRGB IEC61966-2.1 color profile. I wiish to convert these over to the DCI-P3 D65 Gamut With sRGB Transfer color profile so all my pictures will have the same color profile. It's that simple. "

An ICC profile describes a colourspace, the beauty of device independent ICC profile technology is that profiles do not have to match, conversion takes care of that.

There is no technical reason to store all your images in the same colour space. 

In practice, Photoshop simply reads the document ICC profile and converts the image data "on the fly" (using the display profile), for accurate viewing. 

If, say, making a print at home the print process is able to convert from the embedded document colourspace (identified by its ICC profile) to the printer's colourspace, (using its ICC profile). 

"Okay, thanks for letting me know that it's not a standard profile. Basically, there is no way to to convert it to DCI-P3 Gamut with sRGB transfer inside photoshop by default. I will just convert my picture with DCI-P3 Gamut with sRGB transfer to sRGB then."

If you really want to store (I like to think of this as archiving the masters) all your images in the same colourspace, I would not recommend using sRGB as a destination for your Galaxy files, because it's smaller than the DCI-P3 D65 Gamut With sRGB Transfer colourspace, you will potentally be clipping data. 

Your Galaxy camera can capture colour that’s outside the "gamut" of sRGB.

sidebar:

I've even seen instances where an iPhone could capture and display colours that were not viewable on an Eizo Coloredge display ( that display pretty much covers the Adobe RGB colourspace)

There's little point converting your early sRGB image files to a P3 colourspace ( @davescm told you about a P3 version with the sRGB transfer curve) because that’s like pouring a shotglass into a wine glass. Nothing is gained. 

Of course, as others have explained, sRGB is the de facto colourspace of the internet and for file exchange where colour profiles may be ignored. It's a kinda safe 'common denominator' (but becoming less so in the days of large gamut display screens). So I would "archive" the P3 files and when it comes time to put them online, convert a copy to sRGB. 

I think the time will come when a colourspace close to P3 will become the de facto, but that’s very likely some time off. Why? Many new display screens, MacBooks, iPhones, your Galaxy and other modern handhelds are very close to P3 in capability. But this opinion is a digression at the moment. Its time may come. 

I hope this helps

neil barstow colourmanagement - adobe forum volunteer,

colourmanagement consultant & co-author of 'getting colour right'

See my free articles on colourmanagement online

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