Hi all,
http://displaycalibrationtools.com/ offer a Custom Color Patch Sequence Generator that could be useful for setting the chroma right on the display before profiling. I am having a difficulty with older CRTs to set the chroma/saturation not to much not to little, if you set them by RGB primaries it usually is to high. With Custom Color Patch Sequence Generator I could make a small steps in desaturating the RGB primaries and set the chroma better? Would anyone recommend any of preset sequences from Custom Color Patch Sequence Generator or should I create my own custom one?
Anyone having similar experiences, how are you setting your chroma before profiling?

Cheers!

Teo, I don't see how a Custom Patch set can help for pre-profiling set-up.
The sets are for 'profiling', not Initial Display Set-up.

Also, with CRTs I don't see how you can adjust peak Gamut?
That is fixed by the phosphor used.

Steve

Maybe I was not so clear what I think. Right now in LightSpace I can mesure only color patches that are there, to pick from. I would like to get a patch with different saturation levels of R, G, B,... That way I could mesure if my chroma setting on CRT is to high or to low. Like is done for R,G,B, white point. Is that a right way to check chroma level? Once we were talking about it via email:
"Use the 'Measure' mode with 100% colours RGBCMY.
The probe measure cross on the CIE diagram should be in the target circles.
You can't use 50% colour."

Would Custom Color Patch Sequence Generator help with this? Is it posible to create/import "desaturated RGB" patches this way?

Cheers!

Sorry Teo, you're not really making sense to me...



To measure a display's saturation you measure peak RGB.
That is basically the display's gamut.

Steve

OK I understand that, let just say hypothetically if display doesnt fit in primeries is it posible to set chroma level right? How?
Contrast/brightess we set with your charts, than check gamma etc how about chroma/saturation level of displays?

If the peak RGB values show a gamut smaller than the target there is nothing you can do to increase them via a LUT, or any other calibration.
The display is basically not fit for purpose.

Does that help?

Steve

I understand it perfectly, all clear! CHEERS!

Just a thought, back in the days, there were ways to "calibrate" lets say more set a monitor in edit suite or similar, with bars test signal, after you set the contrast/brightness you where to use "blue only" function and set the chroma/hue. I remember that, so I was thinking how to this now days with CMS system, yeah of course like you described it, primaries on their places+LUT...

That was a basic white point/colour balance calibration.
It should not be used for today's calibration at all - it's just not accurate enough, and again does nothing for overall gamut/saturation.

Steve

Ok, Steve once again thanks to make things clear!