Originally Posted by kamui
When I did the 21 point sweep, there was indeed awful spikes and dips not present with the 10 point, so that tip helped me a lot! Thank you.
I'm confused by you saying to not make real time readings / adjustments. How would that be more beneficial and I don't know how I could guess what they might be without that constant feedback.
I mean don't do 100% White in real-time RGB adjustment and then go to 90% Gray, do real-time, then go to 80% Gray etc...
Measure whole Grayscale with 21-Point Grayscale and then look the software RGB balance chart, if you see that the mid-top end of you grayscale has more red, then open your OSD menu remove red from 50-60-70-80-90-100, with values you believe it will redure the Red Y error, then close the OSD menu and re-measure again with 21-Point.....so you will see the new charts not and decide what to do to reduce other errors etc, and have better idea how the whole grayscale affected by your changed.
Doing this, you will have much smoother gradation later when you will look a Grayscale Ramp since your adjustments per each control point will be more linear.
Originally Posted by kamui
Separately, I calibrated the CMS with 100% patterns, but today I did 75% instead and got much less saturated colors, which does indeed look more natural to me, but I was surprised at how much the variance was and it makes me curious how far off my colors really are at different saturation levels and as far as I know, I can't do the saturation sweeps with the AVSHD 709 disc.
About the patterns you are using for your CMS calibration, when you have patterns with 75% Saturation and 75% Luminance then use 75% REC.709 colorspace target @ HCFR preferences.
Note that AVSHD disk patterns named as 75% Color have 100% Saturation with 75% Luminance (not with 75% Saturation) while the100% color patterns you see labeled have 100% Saturation and 100% Luminance level.
This means that with HCFR and AVSHD you have to use only the 'REC.709' as target colorspace when you are using AVSHD CMS patterns.
BTW, there a mis-match in AVSHD Grayscale patterns when you are using HCFR, to resolve this, HCFR will add an offset to fix that issue.
There is a grayscale levels mismatch between grayscale patterns available to AVSHD with the patterns HCFR engine calculated the dE, but HCFR has an option to its preferences to fix that level mismatch.
The ''normal rounding' (untick the round down) is for calibration disks designed for HCFR or ChromaPure so HCFR will work normally like how it's been programmed (RGB triplets of HCFR are based to same RGB triplets of ChromaPure's engine).
But you should 'use round down' for AVSHD and DVE disks because these disks are not matching exactly the levels that HCFR (and ChromaPure) engine's is expecting for the grayscale measurements/dE calculations.
ChromaPure/CalMAN...don't have that 'round down' option to their settings.
So HCFR users with AVSHD/DVE disks will not have 100% exact match for the half of the grayscale measurements if they don't tick the 'use round down'.
The difference you will have @ gamma calculations when you haven't ticked the 'use round down' will be:
5% Gray = -19.22% Luminance error
10% Gray = -9.23% Luminance error
15% Gray = -5.82% Luminance error
20% Gray = -4.10% Luminance error
25% Gray = 3.07% Luminance error
30% Gray = 2.39% Luminance error
35% Gray = 1.90 % Luminance error
40% Gray = 1.53 % Luminance error
Also the 4-Point Saturation of AVSHD is not compatible with HCFR (and there no fix about this), for example:
AVSHD 50% Red Saturation Pattern has RGB Triplet 190.95.95 but HCFR's Color Engine needs/calculates errors from RGB Triplet 191.96.96, it's 0.42 dE2000 error.
AVSHD 75% Magenta Saturation Pattern has RGB Triplet 203.100.203 but HCFR's Color Engine needs/calculates errors from RGB Triplet 202.99.202, it's 0.36 dE2000 error.