Originally Posted by Bruce2019
I have a beginner question and dont want to start a new thread..
I got a X-rite i1 display pro and use the HCFR calibration software.
To cut it short.. The calibrated 6500k colour temp very cool for me.. Before that i had a very low colour temp under 5000k that I calibrated with eye balls and grey test pattern.. For comparison I also calibrated the plasma on around 5000k and I really like this picture. I now have 6500k placed on cool and 5000k on warm setting to switch. Grey scale tracking is really good on both..
Are my eyes just not used to this colour temp? Or is it OK to watch with a lower colour temp.. I watch at night with very warm and low light in that room. Maybe that is the reason???
I have attached some pictures. 6500k and the second is 5000k.
Hi, how old is your meter and what display models are you calibrating? Are you using some specific meter mode of i1Display PRO?
We use D65 (which has been created with specific mixture of RGB...see below) which has 6504K because this is the white point the movies has been mastered (BD/UHD).
Each colorspace (REC.709 for BD / REC.2020 for UHD) while they have the same xy cordinates to create the D65, it's using different mixture of colors...while they have 6504K.
You can have 6504K temperature with different RGB channels mixture.
When you are using a meter/calibration software but you check only the Color Temperature Chart for the Grayscale, while the Color Temperature Graph can be perfect, the same time the RGB Balance Chart can be off.
This is happening because just a number 6504K is not the same as when we say D65 for a specific colorspace.
When you see the RGB Balance Chart of a calibration software and you see the three (R/G/B) Channels Bars at exact 100% = 0 dE; doesn't mean that you have used equal percentage of each color channel.
The calibration software it's doing the normalizing internally according to the selected colorspace target options to give you better presentation for easier calibration.
D65 White Point for REC.709 (BD Movies) Color Space is using Red 21.27%, Green 71.52%, Blue 7.22% which gives 6504K.
REC.601 (PAL...EU DVD) D65: Red 22.20%, Green 70.67%, Blue 7.13% which gives 6504K.
REC.601 (NTSC... US DVD) D65: Red 21.24%, Green 70.11%, Blue 8.66% which gives 6504K.
REC.2020 (UltraHD Movies) D65: Red 26.27%, Green 67.80%, Blue 5.93% which gives 6504K.
All these colorspaces are using D65 as reference white point.
It happens (the most times) that the Warm1/2 of the consumer TVs (because coming not calibrated from their factory) to be closest mode when you have D65 White Point as a target, so for someone without measuring instruments, he is choosing one of those modes, these factory modes as selections are still providing uncalibrated picture.
When you have meters/software, it can happen a loe-grade instrument to report that Warm1 is closer to D65 and a more expensive reference $10.000 instrument to report that Warm2 is closer preset to D65.
Even having only your White Point calibrated perfectly, still doesn't mean that your picture will be good, you can still have sunburned skintones and vivid colors.
If your White looks red-ish tint then it will be a meter issue, it will be improved to look 'more neutral white' if you create a meter profiling table using a spectrophotometer or a higher grade spectroradiometer.