So in your calibration section the DE errors of 0.4 max 1, are for the DCIP3 colour space? For example if you set the calibration report to SRGB, the DE errors would be a lot higher? Are the default measurements in your review also for the DCIP3 colour space?
I am confused now, in the little box at the top of the picture, it says "SRGB", so how could you get a DE error of 0.4, if the ICC profile cannot move the colours to the correct places for SRGB?
Or the monitors colour space is DCIP3, but it comes out of the box calibrated reasonably close to SRGB? I am very confused about the colours on the monitor haha. For example a TV would just switch colour space depending on content.
it's a tricky one to get your head around, and measuring wide gamut screens using these methods is a bit tricky. let's assume we are talking about the 950G model here by the way which always operates with a DCI-P3 colour space from the backlight, with no way to restrict that to a smaller colour space.
The default measurements out of the box using the colorimeter + LaCie software measures a few different areas, some of which you can consider as normal, and some which are more tricky. The CIE digram on the left measures the colour space in a 2D triangle view, relative to either the sRGB colour space area, the Adobe RGB colour space area, or ISOcoated colour space area, depending on which option you tick at the top. that selection of sRGB vs Adobe RGB there has absolutely no bearing on any other measurement or consideration of the measurements, it literally just changes the red triangle drawn on the diagram to show you what the sRGB or Adobe RGB triangle would look like in a 2D view, compared with the black triangle representing the monitors measured colour space.
Then the gamma and white point (ie colour temperature) are measured and are not impacted by the gamut of the screen as such. likewise with the separate measurement for brightness, black point and therefore contrast ratio
The dE section is where it gets a bit messy on wide gamut screens. running the "validation" part of the LaCie software at default screen settings where an ICC profile is NOT being used or active, will assume that you are comparing the measured colours of the screen against the sRGB colour space by default. For a normal gamut screen that is fine, as it assumes you are wanting to measure the colours against the sRGB reference, and so a low dE is ideal there. For a wide gamut screen it is however comparing the colours shown on the screen (which will be more saturated than sRGB) and comparing them against an sRGB reference (as the software knows no better than to assume it's sRGB) and so you end up with very high dE. it's hard to therefore draw any conclusions about the "accuracy" of the colours here, as the displayed colours are not being compared with a fair reference point. i must look in to whether there's a better way to compare the default performance against a different reference point than the default sRGB actually, there might well be either through the LaCie software or some other means. we continue to use the LaCie software as it's simple to understand and follow throughout all our reviews, although it is quite old now and doesn't have a massive amount of flexibility for other new things.
for a calibration then, a profile is created which will tell the graphics card how to display the intended colours. Sorry if i confused this point before, but it should be possible to calibrate a screen for certain reference spaces such as sRGB if you have the right software, use the right settings and have a suitable calibration device that can accurately measure wide gamut backlights. If that ICC profile is used
within a colour managed application then it should result in the correct shade being displayed on the screen as intended. however as you've rightly said, getting an ICC profile working with a lot of applications and software (especially games and multimedia) is very tricky so isn't a very useful solution in a lot of cases.
EDIT: I need to experiment with the LaCie software a bit more in terms of whether it can be reliably used to calibrate to an sRGB reference, but actually i believe by default that would be its assumption unless you use a different reference profile within the software. i will need to test this more next time i have a wide gamut screen with me, along with the "default setup" measurements to see if it's possible to more fairly compare them to their target like DCI-P3
crux of it is that if you have the right software/device, you should be able to calibrate a wide gamut screen to show sRGB colours correctly but only within colour managed applications and workflows. but it's going to be tricky to achieve
