Originally Posted by madshi
Which controls have you set to 0-255 and which to 16-235 exactly? And have you left this controls the same way during measurements and video playback or did you change them somewhere on the way? From what you're describing (black level raised + WTW visible) it sounds like there's a double expansion going on somewhere. Please try clearing the VideoLUTs manually by using "dispcal -c". Does that make any difference?
I'm not sure how dispcal handles the situation if the black level is lower than your meter can measure. That would be a question for Graeme.
At the moment I have madvr set to 0-255, the gpu set to 16-235 and the tv (unchangably) set to 16-235. It was this way through the whole process. What bugs me about this is, that the gpu shouldn't even send anything above 235, and in my experience doesn't. I can't clear the VideoLUTs at the moment, but I'm confident that they were cleared. I will however try this as soon as I'm finished with the current dispcal run.
In the dispcal documentation it says, that it will try to correct the hue of the black point. Furthermore it says that it can happen, that this elevates black levels. Luckily there is a switch to turn that off and I'm doing another dispcal run at the moment to see if it works.
edit: -k doesn't make a big difference and I've cleared the VideoLUTs with dispwin -c and the problem is still there.
I really don't get it, even if my gpu sends YCbCr (confirmed by my AVS) the steps above 235 appear, and while the backround is perfectly white, the steps are blue. Here's a picture:
Again, Madvr is set to 0-255, gpu 16-235, TV 16-235.
With a 3dlut I created yesterday everything seems normal in that department, but it has other problems, which I managed to solve through simple reruns. It seems that everytime I do another run the results end up vastly different, although I didn't change anything.@Graeme
: Could it be that the -k switch in dispcal doesn't work? After putting in -k 0.0 the log still contains this:
Adjusted target black XYZ 0.01 0.01 0.02, Lab 0.07 -0.01 -0.08
Target black after min adjust: XYZ 0.009 0.009 0.017, Lab 0.072 -0.009 -0.079
On the other hand the resulting .cal file says
But I definitely see dithering (I have a plasma) if I apply the icm profile that wasn't there before.
I would just like the programs to leave my black alone.Edited by monvo - 10/2/13 at 11:25am