Hi, I'm just starting to learn my way around LS. I created some very quick measurements and 3D LUTs, just for learning purposes. What is boggling me at the moment is the difference in CUBE LUT view and CIE chart. When viewing the LUT via a cube picture in LS the cube shows a lack of gamut in greens and yellows and blues. But when viewing the measurements taken with the active LUT the CIE chart shows all is O.K., no lack in gamut what so ever. And dE is within limits (except in blacks). This is with a 11x profile.

Is this normal? If so, how can I see the final cube, after the lut is activated and checked?

Hi Sanjin, you'll have to define exactly what you are doing in more detail.
(I also edited your post so the images show correctly)

But, what I can see the images agree with each other.
Remember the LUT is the correction required for the profile.

The best is to send me the profile to look at.

Steve

Hi

Okey, for instance, the green primary in the cube isn't where it should be. It's recessed inwards. But in the CIE chart it's right on the mark. This is what is confusing.
But I think I understand: the CIE chart is a profile verification of the applied 3D LUT (so this is the "end" picture, what I'm seeing) and the cube view is just the LUT not the end gamut that my monitor is actually displaying. Right? Or is the cube view of the LUT actually displaying what the end gamut will look like?

What did I do wrong with the picture? I can send you the lut if you want but this is really just me not understanding how stuff works in LS, and not really a lut problem I think

The Cube view shows the correction it will make to the display when that LUT is applied.

Please send me the LUT and the actual profile to look at.

And with images you must use a URL that ends in .png or .jpg, etc, not the URL for a website page that holds the picture.

Steve

Great, so I'm thinking in the right direction. So if the cube is showing inverse gamut that actually means it will scale the gamut by that much in the finale profile, right? Actually this all makes sense! The native gamut of the monitor is wider then Rec709 in the greens and yellows. It's not really wider in the blues though but the cube still show inverse gamut mapping will occur. Hm... maybe I should look again at the native blue gamut.

I'll send you the lut. Okey. Just one minute.

Send the Cube and the Profile...

Got them.
So the LUT is made for the original display profile.
That LUT is then applied and the Quick Profile made with the LUT active.

All's as expected.
The LUT performs the required correction from the original profile.
Look at that original profile and you will see the gamut is the opposite of the LUT.

Yep, that's it! thx

Just a side question, is there a way to export images of the CIE charts and dE, and LUT cube view, etc.?

No, we don't have any 'report exporting' capability.
It's on the 'to-do' list... but to be honest, it not really important to our users, as calibration accuracy is the real goal, and we focus most development on that.

Have you found the 'right click' on a point with the CIE diagram to see DeltaE data, etc?

Steve

You mean double click? Yes, I have The first RGB number on the right is the patch colour and all the other data bellow it (XYZ, Yxy, etc) is the measurement data?

Yep - that's the one!