Leonard Evens wrote:
One thing that confuses me is that by appropriate choice of the default gamma setting---the monitor offers 3 possible settings, dispcal -r shows gamma = 2.2., but after calibrating/profiling and loading the calibration into the video LUT via xcalib, I get quite high gammas, in the range 2.6 to 3.1. I've even tried using the argument -g 2.2, but that doesn't seem to make any difference..
Gamma is hard to measure, because no-one can agree on exactly what it is. If you use ambient light adjustment, then the gamma may be boosted to increase the contrast. Normally the "dispcal -r" report should agree reasonably with the target set using -g, if ambient compensation is not being used. Graeme Gill.