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I’ve a bit confuse about display calibration step:
- In calibration we adjust interactive display, purpose is for get white point – white is white not tinted to something else that not white correct? That why we adjust R G B to get most white then?
- What happen if I set white point to as measured is that will effect the ICC profile creation?
3. Does the calibration data is within ICC profile file? Suppose I format my PC what file to keep as backup? So after reinstall windows and displaycal then I will copy back and load in profile loader. Only ICC file? Is that mean calibrate is buildin ICC file itself or separate to another file?
I’ve a bit confuse about display calibration step:
- In calibration we adjust interactive display, purpose is for get white point – white is white not tinted to something else that not white correct? That why we adjust R G B to get most white then?
Ineractive display adjust is for using OSD controls instead of GPU LUT (less banding and such)
- What happen if I set white point to as measured is that will effect the ICC profile creation?
WP won’t be corrected in GPU LUT. Grey color will be corrected to current WP.
3. Does the calibration data is within ICC profile file?
Yes, VCGT tag inside ICC file.
Suppose I format my PC what file to keep as backup? So after reinstall windows and displaycal then I will copy back and load in profile loader. Only ICC file? Is that mean calibrate is buildin ICC file itself or separate to another file?
Yes, save ICC. On OS reinstall, install display cal, then File > install profile from file and choose your ICC.
Oh! that is clear now. Thank so much. Another question that confuse me is:
White level for set the target brightness, does it effect the way to calibration for ex. does it adjust GPU LUT to match target brightness?
Say for example my laptop the nearest target of 120ca/m2 is about 135ca/m2, 90ca/m2 or something like that. If choose either one then set target 120ca/m2 “compare” with choose 135ca/m2 or 90ca/m2 but now set target “as measure”. The calibration result is the same or not? Will they do compensate to get target of 120ca/m2 in GPU LUT or not? Or something else?
And result color, gamma accuracy will different in ICC profile or not?
For white level that set brightness almost match the target, and another far from target does it will effect quality or calibration and profileing or not? Or it just only difference in brightness?
FYI : my laptop uncalibrated white point is around 8000K and when calibrate to 6500K screen look a bit dull/dim or something like thet. When reset vga gamma table at displaycal loader, then display is more clear. I think it normal, because it expense for the change of white point and gamma 2.2 right? Unlike external display I can adjust RGB on OSD.
Usually in most calibration software packages brightness targets is only for feedback purposes when you configure brightness, it won’t correct it.
Gamma/TRC won’t vary since gamma is relative.
Correcting WP in GPU destroys contrast, you are limiting 1-2 channels max output. The further WP is, the more contrast will drop.
Usually in most calibration software packages brightness targets is only for feedback purposes when you configure brightness, it won’t correct it.
Gamma/TRC won’t vary since gamma is relative.
Thank! I understand now that is for feedback for brightness target only!????
Now correct WP that a bit concern me. Since most laptop can not adjust RGB by OSD so only GPU option available. Is there another way around for improve contrast or any other tradeoff on something else?
I’ve test my laptop native WP is 8000K (I think) clearly quite far from 6500K. And clear dim/contrast. Another new MSI laptop which is good spec 100% sRGB, 100% Adobe RGB and I got almost 99%. But for WP it not so good out of box. Red and Blue is high, Green is very low. After calibration it look quite yellow on overall windows gui, that is cause for gamma/wp correction by GPU I’m sure (it normal when reset gamma table). Verification show very good anyway.
So is there anything can improve on WP correction but not too much contrast / dim tradeoff too much?
Usually in most calibration software packages brightness targets is only for feedback purposes when you configure brightness, it won’t correct it.
Gamma/TRC won’t vary since gamma is relative.
Thank! I understand now that is for feedback for brightness target only!
Now correct WP that a bit concern me. Since most laptop can not adjust RGB by OSD so only GPU option available. Is there another way around for improve contrast or any other tradeoff on something else?
Closest/closer daylight white to native uncalibrated white. Maybe D75/D70 or something like that. It looks “bluer” but “white” (no pink, no green).
If you do not have a proper CCSS for that particular laptop you may want to rely on visual whitepoint editor to avoid green/pink cast in white (for center of screen).Closest/closer daylight white to native uncalibrated white. Maybe D75/D70 or something like that. It looks “bluer” but “white” (no pink, no green).
Or D80/D85 also? Since it quite more near to native WP display? Any disadvantage? Once I choose WP more bluer like this D70/D75/D80/D85 it does effect only black-gray-white or also effect the color also?
If you do not have a proper CCSS for that particular laptop you may want to rely on visual whitepoint editor to avoid green/pink cast in white (for center of screen).
I’m not sure if I need CCSS since I use i1display pro plus and use WLED white for correction for my IPS 65% sRGB laptop, PFS phosphor IPS 98% adobe for MSI IPS 100% RGB/Adobe laptop. Does CCSS still need for set WP?
Ps. Vincent you are so fantastic! I didn’t expect to get answers this fast! ????????????
Calibrite Display Plus HL on Amazon Calibrite Display Pro HL on Amazon
Disclosure: As an Amazon Associate I earn from qualifying purchases.Closest/closer daylight white to native uncalibrated white. Maybe D75/D70 or something like that. It looks “bluer” but “white” (no pink, no green).
Or D80/D85 also? Since it quite more near to native WP display?
YMMV. The one that looks ok and does lower contrast too much.
Once I choose WP more bluer like this D70/D75/D80/D85 it does effect only black-gray-white or also effect the color also?
Since images are rendered un color managed or color managed through ICC (relative WP ) it will change overall screen color cast… but eye adapts to other WP.
If you do not have a proper CCSS for that particular laptop you may want to rely on visual whitepoint editor to avoid green/pink cast in white (for center of screen).
I’m not sure if I need CCSS since I use i1display pro plus and use WLED white for correction for my IPS 65% sRGB laptop, PFS phosphor IPS 98% adobe for MSI IPS 100% RGB/Adobe laptop. Does CCSS still need for set WP?
CCSS is for measurement. If you set … let’s say D75 calibration target and let i1d3 colorimeter calibrate & measure, then unless you have proper CCSS it won’t calibrate to actual D75 because measure coordinates won’t be accurate.
So you saying if I can live with low contrast then I will get WP match down to target ex. 6500k and it not look “blue” then. But if I can’t stand that low contrast then let it more cool/blue by set WP more near native display WP to the point that I’m ok with white(even more blue) and contrast. Correct?
CCSS is for measurement. If you set … let’s say D75 calibration target and let i1d3 colorimeter calibrate & measure, then unless you have proper CCSS it won’t calibrate to actual D75 because measure coordinates won’t be accurate.
The correction like WLED white, PFS phosphor etc. Alone not good enough?
