With reference to the above post
, I have continued testing with real contents. My conclusion is that using parametric gamma to cut gamma at low IRE gives a washed picture fro dark scenes.
So I have used parametric gamma only to flatten gamma at low IRE.
I have followed a 2 steps process: First generating a Display Characterization, based on my panel nearblack (BR=52, having partially fixed RGB balance from service Menu, and now starting gamma=2.2) and, based on that, converted to REC709 gamma 2.4.
Then I have fixed the bad near-black (typical of my pannel
) by using parametric gamma shaped over a 45 points gray scale. The main point was to fix black a 3 IRE (not readable by the meter and hardly visible). I have also fixed up to 14 IRE.
Here how gamma was modified:
Here the outcome of the usual 1024 patches:
dE2000 stays below 1 and average is around .3. Maybe it depends that, in addition of what I have usually done, I have clicked "Average Low LightMeausurements.
Here the graph of point above 0.75: