How can I test my monitors to determine if they can support Display P3?

[uzinida]

Hello.
I'd like to assess the color coverage of my current monitors. While I managed to identify the Display P3 gamut by viewing images online, my interest lies in determining the percentage of the Display P3 gamut that is visible to me. So I set the color profile to Display P3 when I first created it in Photoshop. The background color was established as R255 G0 B0. I then positioned the text at the center, progressing through shades like 98% (R250 G0 B0) and 96% (R245 G0 B0), effectively working towards achieving the 90 percent threshold. This process of gradual adjustments was also applied to other colors such as Green, Blue, Black, and White.

Now... This is what I'm curious about.
1. Is adjusting the text color in this manner a suitable method for testing Display P3 compatibility?

2. If this approach is accurate, I utilized 98% intensity values (R5 G5 B5) and 96% intensity values (R10 G10 B10) for Black. Similarly, for White, we employed 98% (R250 G250 B250) and 96% (R245 G245 B245) intensity values. However, these values appeared quite distinct on monitors not compatible with Display P3. What strategies can I employ to ensure proper perception of black and white in this context?

Could someone please provide an answer to my inquiry?
Thank you.

[c.pfaffenbichler]

I am not sure I fully understand what are trying to achieve or how you arrived at the method you seem to employ. 

@D Fosse , @NB, colourmanagement , please forgive the intrusion but do you have any insight into this? 

[NB, colourmanagement]

You could make a display profile then using an application like Colorthink Pro (a gamut mapper) to compare to P3. 
If you don't have the app or similar, please upload the display icc profile and I'll test it for you. But be sure to PM me in case I miss your message. 

I hope this helps neil barstow, 
colourmanagement net :: adobe forum volunteer
google me "neil barstow colourmanagement" 
for lots of free articles on colour management 

[NB, colourmanagement]

@uzinida  Yes, as @Conrad_C  suggested you could upload the display manufacturer's default display ICC profile here and one of us can test it for you. 

More here on display profiles and the need for them

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

[Conrad_C]

I think I see what you’re trying to do, but it seems too imprecise to be useful. One big problem is that the shape of P3 (and other common display gamuts) is not uniform, so the shape is very irregular, meaning that figuring out one color value does not make it safe to assume the appearance of a nearby color value, unless you specifically test that one too. A simple calibration/profiling device would use the same process but very rapidly displaying and measuring a large number of color patches to achieve sufficient precision, and then it can build a precise gamut plot for you in seconds.

Like Neil said, a quick way would be to look on your computer for the default display profile that’s supposed to be associated with that display, and attach that to this thread. One of us can then open that in a gamut viewer and see what the expected coverage is supposed to be.

Another way: What is the make and model of your display? That could narrow it down extremely quickly, because most manufacturers state the gamut on the spec sheet. For example:

• If the model is a conventional display (does not claim to be wide gamut), we can assume it is something around sRGB, and therefore we know for certain that it falls far short of P3 in most colors. 
• If the model claims to cover around 100% of the Adobe RGB gamut, we know that it will mostly overlap with P3, but reproducing more colors than Adobe RGB in some ranges and fewer colors in others. 
• If the model claims to cover around 100% of P3, then we’re done. You just have to make sure it’s profiled to get the most out of that display’s actual gamut.

However, these values appeared quite distinct on monitors not compatible with Display P3.

By @uzinida

This might have happened if the test image contains an embedded color profile, because that would cause color-managed applications to automatically adjust the displayed color values to reproduce appearance and color details more consistently in other display gamuts. So a color value difference in P3 would be scaled to still be visible on sRGB display, defeating the purpose of the test. Again, profiling/calibration software takes all of this into account for you and avoids these mistakes.

What strategies can I employ to ensure proper perception of black and white in this context?

By @uzinida

Because gamut shapes are not uniform, maintaining both neutral gray and linear tonal reproduction from dark to light is a challenge through simple trial and error. Again, profiling/calibration software incorporates expertise in doing this properly, so generating a custom display profile is the quickest and most reliable way to get a black and white rendering that is both neutral and linear from dark to light, in the current display gamut.

[uzinida]

Hello, @Conrad_C 
Thank you for your helping. Your coment is very helpful to me.
Upon re-evaluating my post, I've recognized that my explanation was not comprehensive enough. So can I explain it more accurately? Currently, I have 3 monitors. 
Monitor A: DCI-P3 96.6%, sRGB(BT709) 99.4%, BT2020 81%
Monitor B : DCI-P3 96%, sRGB(BT709) 99%, Adobe RGB 99%
Monitor C : DCI-P3 97.35%, BT709 100%, BT2020 85.25%

That is, the reason why I posted it to inquire about testing images with the DCI-P3 color space, a shared specification among the three monitors. This color space stands as a common specification shared among the three monitors I'm currently evaluating. The primary objective is to rigorously scrutinize the individual specifications of each of these monitors.

So I made the images like attached the my past post.
I Think... These images have a help—to serve as a means of effectively assessing and checking the unique specifications of each monitor.

By displaying these images on their respective monitors, (I mean, I'll put the same image on each monitor at the same time) I aimed to gauge how well they conform to the DCI-P3 color space and whether any adjustments are required to align them with the desired standards.

[D Fosse · Accepted solution]

Display panel manufacturers (that's mostly LG and Samsung) have traditionally specified their wide gamut panels close to the standard color spaces Adobe RGB and more recently DCI-P3.

There's no particular reason for that, other than easy marketing. Monitor gamut could have any shape or form. The monitor is its own color space, and in a color managed environment it could be anything at all. The monitor profile just describes the monitor as it is.

So there was never any expectation that a wide gamut monitor should exactly match either Adobe RGB or DCI-P3. They never did and never will. Those numbers are, again, mostly marketing. It's in any case impossible to take two three-dimensional volumes and define the differences in a simple % number. It's much more complicated.

The sRGB specification was originally made as a description of a typical/average CRT monitor. Then came LCD panels, which behaved rather differently, they just had fairly similar primaries. So already sRGB is quite inaccurate as a description of actual behavior. But it stuck. And ever since, monitors have been defined in terms of standard color spaces.

With the highy saturated colors at the gamut boundary of a wide gamut monitor, I'm not sure if you can even see these small differences. That's like looking at car headlights straight on. The practical implications of gamut clipping are more about loss of texture and "air" - not saturation as such.

In short, I'm not sure this exercise has any practically useful purpose.

[uzinida]

Yes, I was wondering if this behavior was meaningful or not. Thank you!

[D Fosse]

Just to sum up and condense the whole thing for the benefit of anyone else reading this:

What is important is that colors and tones are correctly reproduced within the monitor's capabilities. Within those limits, all monitors should display identically and consistently. The monitor profile will remap the source data to the correct representation on the screen.

The whole point of color management and (icc) monitor profiles is that color spaces don't need to match. One is remapped into the other, so that appearance is preserved. A wide gamut monitor does not need to match Adobe RGB, DCI-P3 or anything else. It could be anything in between or something else altogether.

Color spaces only need to match when there is no color management.

As for white point and black point, those are set as calibration targets in your calibration software. The white and black point is the environment that color management works within. They are not part of the color management chain as such. In the conversion from the document profile into the monitor profile, 255-255-255 white is just remapped to 255-255-255 white as reproduced by the monitor in that calibrated state.

[Conrad_C]

Sorry, was away from this thread for a while, but I have some comments about this part:

…Currently, I have 3 monitors. 
Monitor A: DCI-P3 96.6%, sRGB(BT709) 99.4%, BT2020 81%
Monitor B : DCI-P3 96%, sRGB(BT709) 99%, Adobe RGB 99%
Monitor C : DCI-P3 97.35%, BT709 100%, BT2020 85.25%

That is, the reason why I posted it to inquire about testing images with the DCI-P3 color space, a shared specification among the three monitors.…

By @uzinida

Well, technically, all of the displays share all of the color spaces you listed; they just share different proportions of all of them. P3 is not even the one they have most in common; the three displays have the highest percentage in common of sRGB, all above 99%. Although I think I do understand that you are talking about the wide gamut that they have the most in common.

But I want to emphasize that percentages are not useful for comparison. The percentage is just an academic average number across the total 3D volume. The two major flaws with percentages are that gamut volumes are not uniform (as mentioned earlier), and some colors are more valuable to you than others.

The diagram below shows the 3D gamut of Display P3 (gray) overlaid with Adobe RGB (color). Notice that 96.6% is not useful because there is almost no point on that graph at which DCI-P3 is exactly 96.6% of Adobe RGB, because:

In the reds, Adobe RGB is more than 100% of Display P3.

In the greens, Adobe RGB is less than 100% of Display P3.

And all of the other colors are not 96.6% either, but many other percentages depending on the exact hue and saturation.

Both gamuts reproduce the most colors around the lighter midtones (top of graph), and the fewest colors at the extreme light and dark tones (bottom of graph), but again, rarely exactly 96.6% of Adobe RGB.

96.6% would mean something if the gamuts were perfect spheres or perfect cubes, but they aren’t, so it’s not useful. What is useful is how far a gamut reproduces the colors that are required for your work, and the color reproduction of the media where your images end up. For example, two displays could cover 98.6% of Adobe RGB, but if one of the displays extends the extra 2% over weird colors you rarely use, then the other display will be better if it extends the extra 2% over more common colors you frequently need to reproduce. So remember to compare based on actual coverage of important colors, not by unusable average percentages.

[FlashElek]

Thank you!