Originally Posted by Sittler27
On my JVC NX9 I performed a gamma+color autocal with my Spyder5Pro for DCI mode (iris=0). Everything looked perfect.
I use madvr + Kodi as the player, with madvr set to “display calibrated = DCI-P3”.
After adjusting Brightness to -3 and Contrast to +1 & Gamma to 2.4 PT3 DG3, I then went into HCFR with my i1D3 to fine-tune off screen (0.98 actual gain).
Using Custom 1/6500K, I found that I needed to drop green gain substantially to -11 just to get red and blue to come up.
Does that sound normal? If not, what could I be doing wrong?
Are these projectors known to have this much green push?
Other adjustments in this DCI mode included offset red to +4, offset green to +2 and offset blue to -2.
Doing the same (after autocal) of Natural mode (6500K; gamma 2.4 PT3 DG3), I found I still needed to drop green gain to -5, red gain to -1 and red offset to +3.
It should also be noted that after an autocal of HDR10 mode (no filter; HDR color) I then had to do some really crazy adjustments of gains/offsets (with ATV4K as source) to bring greyscale inline. Had to drop green gain to -15 and some other large adjustments of red and blue offsets. Again, just wondering what is normal and what I could be doing wrong overall.
Dropping green that far could be normal but remember you aren't adjusting that from stock as in "Are these projectors known to have this much green push?". You ran color autocal with a spyder which could just not be very accurate compared to the i1 Display Pro. Your spyder could have added a bunch of green during autocal. Or perhaps they are both off somewhat from each other in opposite directions meaning that after you use one, using the other to correct it could be a bigger adjustment.
Also, you should not really use positive offset adjustments as that will raise your black floor and lower your contrast ratio pretty considerably. Instead if you want to tune the calibration with a better meter after doing the automatic autocal you should use the autocal gamma adjustment tab along with HCFR and your i1D3 which is a manual process.
Open the gamma editor in autocal, and in that screen set the gamma to Custom1 and the correction value to whatever you are targeting, like 2.2 or 2.4.
In the autocal gamma screen you will see that you have 12 gamma points: 5, 10, 15, 20, 30, 40, 50, 60, 70, 80, 90, 95.
On the projector set the gamma value to Custom1 as well and set the correction value to "Import".
In HCFR make sure that in references (Advanced -> Preferences -> References tab) you set the gamma target to the same one that you selected in autocal correction value, like power law gamma 2.2 or 2.4. Also make sure you have the correct white point selected like D65. Then open the Grey Scale view and right click on the line graph part on the bottom and make sure the "w/Gamma" option is enabled. Finally go to Measures -> Parameters, and change the number of greyscale levels from 10 to 20.
The first thing you should do in HCFR is click the 100 in the % White row and click the green triangle to display white on your screen. On the JVC in your 6500K color temp adjust the gains to balance your white to 100%.
Now, before you begin adjusting in autocal, click the run greyscale button to measure all 20 grey scale levels.
When that is done, pick a point from my number list above, click on that number in the % White row in HCFR grey scale view and then click the Green triangle to display the pattern on your screen. Then in autocal gamma screen, use the first slider to move to that same number point that you chose to adjust. With the second slider you can then move white, red, green, or blue up or down. Moving white moves all 3, so adjust them as you need with the second slider to bring all 3 to 100%. This is calibrating both white balance and gamma to your target for that percent. Repeat this for all 12 points.
When you are done you can save this in autocal if you want, but there is nothing else left to do if you just want to use it, just set the JVC to the Custom1 that you used to do the adjustment.
When you are all done with this, finish by double checking your brightness and contrast values with the black and white clipping test patterns.
Hopefully I made this process clear. If you are at least somewhat familiar with HCFR, autocal, and JVC menus you should have no trouble. Otherwise ask if you need clarification on something.