Does Resolve use OLD or NEW Color Checker values?

I am asking because the specifications on the X-rite support page for the Color Checker are wrong. All Color Checkers manufactured from November 2014 have patches with a new color formula. But no-one at X-rite cared to update the support page of the CC Passport.

Here X-rite talks about the new color specifications:
http://xritephoto.com/ph_product_overvi ... 4&catid=28

And here you can find the new CIELAB values for Colorchecker SG:
http://xritephoto.com/documents/apps/pu ... _l_a_b.txt

The Color Checker SG patches E2:E5 to J2:J5 correspond to CC PP 1:24.

You can convert the CIELAB values to RGB values here:
http://davengrace.com/cgi-bin/cspace.pl

For example:
Patch #15 red : was 175/54/60 (old) and is now 179/0/27 (new).

Code: Select all

1. dark skin  ... 115/82/68   vs. 111/63/41
2. light skin ... 194/150/130 vs. 199/140/120
4. foliage    ... 87/108/67   vs. 78/96/37
13. blue      ... 56/61/150   vs. 0/42/135
14. green     ... 70/148/73   vs. 55/141/52
15. red       ... 175/54/60   vs. 179/0/27
16. yellow    ... 231/199/31  vs. 245/194/0
17. magenta   ... 187/46/149  vs. 188/68/142
18. cyan      ... 8/133/161   vs. 0/130/164

So the question is, which values for the CC PP does Resolve use? The old ones, or the new ones?

I have a Colorchecker Passport with the old color patches, a Colorchecker Passport Video with different (muted) patches, and a Colorchecker SG with new color patches.
Comparing the old CC PP to the new CC SG the new primary color patches are more vibrant than the older ones.

So, no one has an answer to this?
Should I better contact BMD support for this?

My advice is to avoid the Color Checker and instead use the DSC charts. The problem with the X-Rite charts is that you can't rely on them for accurate saturation levels.

Note that it is possible to color-correct dailies completely by hand and without the use of charts entirely, as we did for many decades with film and digital. "In my day," we were lucky to just get a grayscale chart to at least give us an idea of what neutral white, gray, and black were.

Thanks for your answer Marc.
The question is, why can't you rely on their saturation levels? Maybe because there is a data mismatch (old vs new)?

Regarding the old days: I started with CC in the late 80ies and still do most of my work with curves. So no worry, I know how to bend colors to my like without needing luts or color targets

My advice is to avoid the Color Checker and instead use the DSC charts. The problem with the X-Rite charts is that you can't rely on them for accurate saturation levels.

yes -- i also prefer other alternatives, because corrections concerning saturation and gamut compression can not be handled very well by utilizing CC24 targets.

but robert niessners request also sounds very plausible to me. resolves actual support for color targets is very limited and not always satisfying.

• when this feature was added, i immediately asked for IT8.7 support -- a very common choice for camera calibration --, and it's still not available.
  
• there is also no possibility to disable color patches and exclude them from the calculations or select only a subset of patches from one of the color charts with much more different test points.
  
• beside roberts request for support of different CC24 targets with deviating color specifications, i would also like to see the possibility, to load more precise measured reference values, as supplied for many test charts by their manufactures.

The question is, why can't you rely on their saturation levels? Maybe because there is a data mismatch (old vs new)?

The various saturation levels for different color values are inconsistent. If they were specifically designed to hit a Vectorscope target -- as the DSC charts -- then they'd be useful. The DSC people have explained to me that they went through hell coming up with the precise hue/sat values for their charts, which requires a lot of precision and experimentation from their printing company. I would bet they have to toss out dozens of bad charts that don't meet their standards before they ship a chart that's correct.