what do you think of the "75% saturation/100% brightness" method to set primary and secondary colors? Basically that's aiming to hit the 75% saturation point for colors instead of the usual 100% saturation point.http://www.avsforum.com/avs-vb/showthread.php?t=1134710
It makes great sense to me if the display colors are grossly under-saturated at 25/50/75% saturation points.
For example, I calibrated my Samsung A650 plasma using the conventional method of 100% saturation/100% brightness colors (of course after setting brightness, contrast, gamma, grayscale, etc), but was never really happy with the results. I somehow came across the thread linked to above and learned about "75% saturation" and "saturation-luminance" (big thanks to Dan's excellent spreadsheet).
I was quite surprised to see my plasma's performance here. The 25/50/75% saturation points for most of the colors were well short of the mark. Here is the color gamut AFTER I tried my best to use 75% saturation method. The Samsung primaries and secondaries can't be saturated any further, so that's about as good as it gets.
Perhaps more disturbing are the saturation-luminance measurements I obtained. Here are the charts for RED, which are the most problematic (and noticeably incorrect) color. Below are 2 charts. The main color control is set to default in both. In the first chart, the RED brightness is default. In the second chart, the RED brightness (only) was lowered using the Sammie's 3D CMS.
The effect I see of adjusting red brightness is to get the 100% red saturation point close to the correct brightness. But look at 75% saturation and lower! They are too bright. Is there any way I can get this *entire* curve to lie reasonably flat and close to the reference line?