Originally Posted by alextr75
I spent the last two days calibrating my HW45ES on high lamp, with HCFR, ColorMunki Display and Ted's Calibration patterns, using REC 709 (75% / 75%) and BT.1886 gamma target..
I used to use the AVS 709 patterns, but just switched to Ted's and have a little bit more faith in the new ones. Especially given how there is documentation on things to watch out for when using them with HCFR.
Hi, think that Luminance of 75% Stimulus Patterns has about 50% of the luminance of 100% Stimulus, so your adjustment point is at the center of the color luminance range.
Using 100% Stimulus Patterns your adjustment point is at the highest end of the luminance range but you will probably have larger errors at lower luminance levels.
This works for some displays / don't work to others, some display has better tracking, so even using 100% Luminance / 100% Saturation pattern, it tracks good other saturation/luminance levels, but needs to test your own display to find out.
There displays where you get better final results when you use 100% Saturation than from 75% Saturation, there others where when you use 100% Saturation Patterns, you have great performance to 100% area more errors to the lower Saturation levels.
When you have to calibrate a display using it's internal available calibration controls, because the gamut control points are only a few (1-Point per color) you have to try to find out which patterns you have to use for your gamut calibration which will provide you less average errors to all measured saturation levels + colorchecker.
There is not any golden rule which says which type of patterns to use to calibrate the CMS for each display model, you have to try to your display these 4 options.
(75%/75% - 75%/100% - 100%/75% - 100%/100%) to find out which type of patterns will provide you lower dE overall, try to calibrate based to one of these options (for example 100SAT/75AMPL) and at the end, measure using 4-Point Saturation / 4-Point Luminance / ColorChecker / Fleshtones.
Later re-calibrate your display using another option (for example 75SAT/75AMPL) and remeasure at the end with Saturation/Luminance/ColorChecker etc... and compare these 2 reports to see what patterns are providing you lower dE numbers.
The average Caucasian skin tone resides well away from any grey scale, or primary color. That's why you have to check ColorChecker because it contains skin tones, grass, sky, etc.; which are memory colors.
Initially it will take some time to measure these 4 pattern options to find which patterns are providing better performance but next time you will know which patterns to use for that specific display you are calibrating.
This is happening because you have only 1 control point for each color of Gamut Calibration, so you have to find which point you will use (% Saturation/ % Luminance)...think that you have a display with 1-point Grayscale.....where you have to test to see which grayscale pattern will balance better the whole grayscale and provide the lower errors, from 10% Gray till 100% White.
Usually it's better to do 75% Saturation / 75% Intensity or 75% Saturation / 100% Intensity calibration, where you will improve the color tracking of primary color saturations internally; which is more important from having better performance (less dE errors) only to the gamut edges (100% Saturation).
For problematic display where you want to have the best possible performance at every area, you have to move to 3D LUT calibration/profiling, this will correct multiple saturation/intensity/hue levels.