Hi guys, thanks for this informative thread. I've spent the past few days reading through all of the posts and have downloaded and installed HCFR.
I have always wanted learn about calibration but have never owned a meter. I currently own no calibration discs but back in the early 90's I owned a laser disc of A Video Standard and used that with the blue filter to do my best to set up my CRT. Now that there are so many more advanced and affordable options available to hobbyists I was very excited to try it out. I have very little knowlege about this but just enough to be dangerous. (I once knocked myself unconcious trying to fix a Kloss Novabeam CRT projector)
I borrowed a friends i1 display pro 3 and had some time last night to try a bit of calibrating my JVC RS45 projector. I had printed out and started working through the HCFR guide for dummies that was based on the 2008 version of the software, I made it through about page 30 before running out of time.
I have the projector sourced from my HTPC and all my blurays are stored on my media server and the files are played through the HTPC. I installed HCFR on the same HTPC and ran a long USB cable into the theater room and hooked it to the meter.
I have the projector set to pass 0-255 and I believe I also have the HTPC video card set the same.
I took a few before and after graphs and have a few questions, so apologies in advance for some newbie questions and a lengthy post.
I selected "non refresh device" in the drop down rather than "projector" based on some recommendations earlier in this thread, does that sound correct?
After running the initial setup and finding the best spot for my meter, I found my foot lamberts to be WAY lower than every recommendation of 12-16. I maxed out at less than 8, I think the best I could get to was 7.98 or so. We've been watching movies for years in here though, totally light controlled room, so I don't really know what to think about that. I was disappointed though.
My projector does not have a robust CMS service and I didn't make it that far last night anyway, but it does have custom gamma calibration ability so after checking initial gamma I went into the gamma custom menu and started tweaking. The custom gamma menu has 4 settings, White/Red/Green/Blue and a graph with different IRE points that you can set individually.
Per some recommendations here and in the projector forum, I didn't touch the green settings at all. I only adjusted red and blue. I also never touched white as I wasn't sure what that did, but I will try and get to that tonight to find out.
After about 10 different passes and re-measures, I do think I was able to positively affect the RGB as well as the grey scale calibration, as seen in these before and after graphs:
These changes seem to have negatively effected my overall gamma though. I thought that the stuff I was doing would bring me closer to the 2.2 - 2.4 range but maybe what I was doing only adjusted grey scale and the actual gamma settings are farther into the calibration guide, past page 32. Also the gamma settings may need to be tweaked using that "White" setting in the custom gamma menu on the projector, and I didn't touch that one last night. This is the before and after gamma graph from last night:
As I mentioned before, I do not have any calibration discs so I was using the images built into HCFR. Under advanced/test images there is one for white level and one for black level. I had a question about these two if anybody has experience in using them:
- the white level test image shows a white screen divided horizontally down the middle. Turning the white level up very high clips the signal and that middle line disappears making it one big white page. What is the correct way to use this test image? Should I turn the white level up to clipping and then back it off just enough so the middle line is visible?
- the black level test image has an entire scale of black to grey bars, most that I have seen just have a blacker than black, black and lighter than black bar and you lower black level until all three match, then raise it just enough to see the lighter than black bar. The image built into HCFR doesn't seem to work like that and I didn't know what to do, so I just set my black level using the test image built into the projector menu, which is probably not ideal as it doesn't take into account any source issues from HTPC or video card.
I will spend more time messing with this tonight, if anybody has any feedback for me I'd love to hear it. Maybe I am on the right track or maybe I am really messing up, I don't know.
I do have one last question, earlier in this thread there was mention of dispcalGUI and Argyll CMS but it was kind of an aside with no detail. Are those worth me looking into? I don't know what they are exactly but if they are a way of taking my HCFR data and actually using that to autocalibrate the source image for proper output on my HTPC, that might be the way to go.