Originally Posted by umr
The key is to do it subtly with the colors that we are most sensitive to that differ from film the most while not not ruining the most important colors. Basically you must reverse the process used to convert the film. JVC has the best shot at this of anything I have seen.
This is worth exploring further. I assume its like an audio compressor/expander, if you know the original compression curve you can fairly accurately restore the original dynamic range. As the JVC has a larger color gamut it can support a higher than REC709 color "dynamic" range but we have to reduce it so that it matches the source.
If we knew how the colors were compressed in the color space originally, it should be possible to recover some of the original colors. After all, isn't this why JVC designed this projector with such a wide gamut? As a manufacturer, wouldn't it have made sense to set it up for just the REC709 color space so that 99.9% of users would not have a problem with oversaturation. But they chose to build this projector with an expanded gamut - so there must have been a good reason for it. Maybe the reason is so that professional calibrators like UMR can restore a more film like look to the projector, so that the expanded gamut becomes an advantage for the JVC projector rather than a disadvantage - and the basis of a well kept secret (calibrators secret sauce). If we could recover some of the film color space outside Rec709 that would be a distinct advantage of having the PJ calibrated.
I'm speculating on the above, however a good topic to explore further....
Now I have to go back to my HT to complete my DIY JVC projector calibration, where I have +- 1 dE error on grayscale except for 10% where the error is more like 12 dE too green and very obvious. Not sure how I can tackle that, and I certainly did not have this type of error when I calibrated the bulb after 50 hours (its now 150 hours). I also punched in lovingDVD's settings and possibly because of the 10dE error, the image now looks significantly worse than my original calibration effort.
Can I confirm that you want to set HCFR to ""use gamma reference to compute greyscale dE"?? Also that you want to get your target gamma set before fine tuning the grayscale? I can see some interaction between the 2.