JVC RS4910/6710 ISF Modes

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What exactly does “provided by JVC” mean in this case? This calibration setup did not come with an RS67/6710 and was not offered or mentioned by JVC when I reviewed the projector last year. Spyder meters have a bad reputation for color accuracy, though they did the “light”/gamma thing OK in the past. It has never been easy to get gamma right on JVC projectors over the last 5 years or so. Lumagen Radiance processors have been the best solution so far. Otherwise you are in for an endless session of messing with gamma sliders in the JVC projectors.

[Anonymous]

Doug/Gregg,

The software I mentioned as “provided by JVC” is at this link https://www3.jvckenwood.com/english/download/dla-x900r_x700r_xc7880_xc5880_rs67_rs57_rs49_calibrationsoft.html

Its also referenced to in the JVC manuals.

I will post some charts showing how the RS4910 that I hv for personal use, shifted from perfect gamma/gamut at 30hrs to typical gamma droop and shrunk gamut at 75hrs. Its not related to bulb as others have seen the same thing. The good thing was that it does not seem to deteriorate after that. With JVC removing the multipoint gamma option from the 2014/2015 JVCs it was impossible to fix without a video processor. While the multipoint gamma is available in the ISF software, its a pain to use. There is no solution for the shrunken gamut though. While for the 1st time the gamut tracking on the JVC is pretty linear if it saturates at rec709 correctly (which it was at 30hrs), it cannot be fixed in the ISF modes when it shrinks.

Both these issues can be fixed using the JVC Autocal software that can only be used with the Spyder4 Pro. I understand the issues with the Spyder4 Pro, however, the autocal software allows a custom gamut to be used so u can essentially offset the innacuracy of the Spyder4 if u get a bad one by using a custom gamut.

Anyway, for those with customers that do not have the luxury of adding a Lumagen, this is the best option. I will post the charts and they shd be self explanatory.

[Anonymous]

I am attaching various charts zipped. They are labelled 30hrs, 75hrs, ISF & JVC Autocal. In them are the Greyscale/Gamma, ColourSpace and Gamut Saturation Charts. All the verification was done using a K-10A profiled against a Jeti 1201.

After seeing the shift from 30 to 75hrs, and no user controls to fix gamma and gamut, I used the ISF software to get things in control. It worked but was a hassle using the multipoint gamma in the ISF software. As can be seen, the blue errors at 100% saturation could not be fixed.

The JVC Autocal software is pretty simple to use. U set up a connection with direct LAN from the laptop or connect the JVC to the same router that ur laptop is connected to (wirelessly is fine).

U setup the IP addresses correctly. U then setup the Spyder4Pro to face the projector. The software guides u thru the process. U then start gamma/greyscale/color based on target decided (rec709 is already there). The projector then does a series of reads (seems more like profiling of the current state). The software then shows u the before/after charts (it loads the profile and reads again to check).

U can go back and setup a custom white/gamut target to offset the readings off the Spyder4Pro vs ur reference device facing the screen to get it accurate or u use the controls in the custom menu to fine tune.

In my case, the Spyder4Pro was close enuf to my Jeti that I did not need to redo with a custom colour points.

The gamma was fixed pretty well in my opinion and its was quite fast. Of course, there is still some tweaking that I shd hv done for the greyscale, but I left it at that for now to reverify. The 2 point greyscale works fine on the JVCs.

The good thing about this is that for those with gamma droop and do not have the ISF modes (X500/RS49) u can still fix the problems using the JVC Autocal without getting an external processor. Of course the Lumagen will be better with the LUT capabilities, but for the cost conscious customer, it pains them to hear that after spending so much money on a JVC, they will need to get an external processor to fix the gamma and colour.[ATTACH]314[/ATTACH]

[Anonymous]

Hi Guys!
Heard the same things about the Auto Cal of the X500 and saw a unit Calibrated that way.
The Thing I would like to know is wether it was possible to Calibrate the X500 “on top of the applied Autocal-Gamma Correction” ?
Gregg – does the ISF Software whose Link you posted above offer 10 Point?
If I understand correctly the auto-cal alters the factory Settings and therefore the foundations of all Settings?

Greetings
Martin

[Gregg Loewen]

hi Martin
I dont know about the “on top of” part…perhaps V can assist with this.
The ISF software allows for 10 point gamma and gray scale adjustment.

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