Originally posted by kaseki See other thread #20 for an image of the Color Checker based on x-rite's reported D50 RGB values. FWIW, no pinkish cast is visible in the Gimp file, the derived png, jpeg, or rendering of the link above on my newly acquired BenQ SW2700PT (factory cal but nothing tweaked yet by me).
Thanks for the link to the other thread. Could I perhaps clarify a couple of things about the two different threads, just to avoid confusion for anyone who happens along here and doesn't read through the whole discussion?
My understanding is that your other thread is about your wish to be absolutely sure that your monitor is perfectly calibrated, beyond the level of calibration that most of us do with things like Spyder (in my case). So, to be sure of that, you've wanted a completely accurate image of a ColorCheck card that you can look at on your screen. And the ColorCheck image that you're referring to above is one that you've downloaded from x-rite to use as a neutral reference on your monitor, rather than one that you've shot with your own camera and lens.
That's a completely legitimate thing to do if you want to be absolutely sure about your monitor's calibration, but it's not really what this particular thread is about. And I'm sure you're already aware that the downloaded test card image from x-rite would be of no use in creating a custom camera profile.
This thread (at least as I've personally interpreted the OP) is about how to shoot test cards with our own cameras and lenses to create custom camera profiles, which has nothing at all to with monitor calibration. We've been talking about things like which illuminants to use, whether we can be sure if the colours in our test cards are still stable after a few years, how the colour characteristics of different lenses affect things -- all the many variables that we have to consider when creating our own custom camera profiles.
This is absolutely not a criticism of your other thread or your valuable contributions to this one. I've personally found the other thread fascinating and informative, but I do want to keep things clear about the different aims underlying the two discussions. Camera profiles and monitor profiles are completely different things, and I think it's important that we avoid any confusion between them, just to help out any newcomers to the concept of profiling who might come along.
Edit: I should also mention that I've discovered that I get different white balance values from the white and mid-grey patches on my own test card, when of course they should be the same. I've concluded that the inks are no longer accurate on my own card, so I'll be getting another one. Any pink cast that anyone sees in the examples I posted above is down to the card used no longer being accurate, so apologies for causing confusion with that.