Hello, I'm relatively new to calibration and was wondering if someone could suggest what I'm doing wrong. I'm using the i1 with hcfr on a jvc rs10. I'm basically looking to calibrate for greyscale, contrast, brightness, and trying to target gamma for 2.2.
I don't seem to have any trouble with greyscale, but brightness and gamma is a problem. I've set white level to the jvc default which gives me acceptable luminance. Then, following the objective black level setting procedure I display a 10 ire pattern (Tom's posted images) and adjust Y to .65% of Y at 100 IRE. I adjust for greyscale then do a measurement. Greyscale measures fine and luminance tracks the 2.22 curve. However, when I check the brightness setting against a pluge pattern (avshd basic settings), it turns out the brightness setting is set to about six clicks too low. When I view a video, there's a clear loss of detail in dark areas. The picture is clearly better with the brightness set using the subjective pluge pattern.
I then do a new measurement with the new brightness setting, greyscale is still good, but hcfr now averages 1.9 and gamma no longer tracks flat across the scale. It tracks linearly from 10 to 30% then starts to drop off, until at 90% the gamma reading is about 1.1.
So I seem to be in a situation where my settings measure well but the black level seems wrong. When black level is set using the pluge it looks better, but gives me a gamma that tracks to a non-linear lower gamma average.
I'm not sure if it's a factor or not but I'm calibrating against a computer source using kmplayer. I haven't been able to find postings from others with like circumstances.
Thanks in advance. Any help appreciated.
Set black level by eye using the pluge pattern. Are you re-measuring your 100% white window after changing the brightness setting with the pluge pattern? Set your settings, take a 100% reading, then measure 0-90%. If that doesn't help, make sure your contrast isn't set too high. You might be clipping white.
I don't know about this "kmplayer," but computer sources are generally crap. Not saying yours is, but it could be the problem.