Quote:
Originally Posted by THX-UltraII
I ll post the calibration results tomorrow I think. Already got an answer from my calibration guy:
1. D6500 REC709
2. Gamma 2.3
3. No ICC profile is made, because it's calibrated as a "normal" Home Theater projector, not as a computer display. It's highly irregular that with an ISF calibration an ICC profile is created, this is normally done with computer displays, or when the projector is setup as computer display.
Is this good enough info nand chan
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Yeah, that's fine. I would have assumed 2.2, but it makes sense to use 2.3 for projectors since that's what the BT.709 spec recommends due to the way movies are overencoded. Either way, the problem now is that madVR outputs a 2.2 PPC, and your projector assumes you input a 2.3 PPC.
Depending on your setup, this can either be a good thing or a bad thing:
1. If your ambient light conditions are perfectly normalized to an ICC reference encoding room setup, it's bad - in this case, you want a perfectly source-linear light level.
2. If your ambient light conditions are average or dimly lit, it's probably the perfect setting. Do you know if he measured your ambient light level during viewing?
3. If your ambient light conditions are very dark to pitch black, it's too low - in this setting you want a curve somewhere around 2.45 to 2.5.
Ideally, you want to perfectly recreate the Trimaster's reference CRT curve, but that's not as easily doable. It depends on your viewing conditions. If in doubt, you can leave his “imperfect” 2.2 -> 2.3 transition (which is actually better in this case, due to, again, overencoding of movies).
His lack of providing an ICC profile baffles me a bit though - they're just as important for video displays as they are for computer displays, since you're using a HTPC to drive your projector which technically makes it a computer display - and an ICC-calculated .3dlut is the only way to get the most out of your viewing experience, especially since it allows you to match gamuts such as xvYCC etc. as well if the need ever arises, without having to pay for an expensive re-calibration.
Ps. How often is he going to update the values? A calibration should be updated at least once a month.