JVC Autocal Software V12 calibration for 2019 RS1000/RS2000/RS3000/NX5/NX7/NX9

[oledurt]

I calibrated using a manual aperture of -3.  If I change from manual to Auto 2 will that nullify my calibration?  Thanks for the help.

[dcchan2]

It will change the gamma, but then you cannot run Autocal with Auto Iris in any case. 

[oledurt]

It will change the gamma, but then you cannot run Autocal with Auto Iris in any case.

Ahh ok.  So it’s a question of whether it’s an improvement over the calibrated gamma.  I know the contrast is improved with the dynamic contrast on.  What would you do?

[CyberPaul]

Since you can't calibrate with Dynamic Iris on, just calibrate with Manual Iris and then decide while viewing. Your calibration will not be nullified.

[oledurt]

Ultimately I did look at a test pattern with the dynamic iris on.  I noticed that it blows the bright whites out for some reason however Contrast is improved.  So for me I just use manual iris with a -3 aperture.  Hopefully JVC will fix the issue at some point.

[SirMaster]

Ultimately I did look at a test pattern with the dynamic iris on.  I noticed that it blows the bright whites out for some reason however Contrast is improved.  So for me I just use manual iris with a -3 aperture.  Hopefully JVC will fix the issue at some point.

It blows it out because it’s boosting the gamma so much. 

I doubt they will do anything about it. I’ve observed this behavior even back to the RS400/500/600 from 5 years ago and it was probably earlier too. 

[jj-34]

Last night I have been able to make a correction matrix for my i1D3 Vs my i1 Pro2 using my N7 and my screen, I carried on doing a few full ( gamma and colour ) basic Autocals using the i1D3 with its correction matrix, here's what I got :

Natural : D65, Rec709, low lamp and manual iris 0 :



User1 : D65, Rec709, low lamp but this time iris = -11 as that's the setting I use to show SDR with 15 FL :



HDR10 :  HDR, D65, BT2020, high lamp and iris = 0 :



Any comments ?
Thanks.

[CyberPaul]

How are you using first calibration with iris=0? Just curious...

[jj-34]

How are you using first calibration with iris=0? Just curious...

I do not quite get your question,  I positioned the iris to manual 0 that's all.

And I did the second one with the manual iris at -11 as Manni said that it should be done with the actual viewing iris setting (at least when viewing SDR material).
So I will be able to compare my Natural picture mode (iris 0) with the User1 one (iris -11).

[CyberPaul]

I asked how are you using it, not how did you get it 

The question is simply this: why did you calibrate with iris=0 and low lamp? Is it too much light for SDR and not enough for 3D or HDR.

[jj-34]

I asked how are you using it, not how did you get it

The question is simply this: why did you calibrate with iris=0 and low lamp? Is it too much light for SDR and not enough for 3D or HDR.

English language subleties, I often do not know how to use some words or expressions that may have different contextual meanings in french, like to at on for etc...
 
I calibrate with iris=0 because this is what was suggested initially to have max light for the gamma low IRE measures and as it was stated that the gamma curve is not dependent on the iris value, but recently Manni suggested to use the actual viewing value so I did it too to compare.

But first finding is that the i1d3 is sensitive enough to return good low IRE values even with the iris closed to -11, look at the D65 grouping, I did not have such grouping with either the spyder or the i1 Pro2. 

[CyberPaul]

No worries, I’m Italian and for sure my English is not perfect! 

[dcchan2]

Last night I have been able to make a correction matrix for my i1D3 Vs my i1 Pro2 using my N7 and my screen, I carried on doing a few full ( gamma and colour ) basic Autocals using the i1D3 with its correction matrix, here's what I got :

You can't adequately "evaluate" the calibration based on the autocal log alone, as there's not enough "resolution".  The lowest point shown is at 12.5 IRE; if there are issues they may occur at much lower levels.

[jj-34]

You can't adequately "evaluate" the calibration based on the autocal log alone, as there's not enough "resolution".  The lowest point shown is at 12.5 IRE; if there are issues they may occur at much lower levels.

I take it the Autocals are a required starting point before doing an actual calibration.
So now I'm looking into the free HCFR calibration, but as a complete beginner I figure it implies a steep learning curve needing time to grasp it and I have so little effective time .....

[dcchan2]

I take it the Autocals are a required starting point before doing an actual calibration.
So now I'm looking into the free HCFR calibration, but as a complete beginner I figure it implies a steep learning curve needing time to grasp it and I have so little effective time .....

Autocal does 33-pt gamma calibration, whereas the manual gamma calibration only provides 12 points. I was referring to checking the results of Autocal using HCFR etc.