Originally Posted by Light Illusion
The current-year D-ILA RS55/65 projectors calibrate very close to perfection with their user menu controls if you understand how to use them.
I have to disagree - I have attempted to calibrate many D-ILA projectors, and not one has been capable of accurate calibration - when balanced the gamut is incorrect, or when gamut is ok, the balance is incorrect. But, as said before our calibration requirements are very tight.
One thing I can say without reservation... I've never, EVER, seen an LCD, D-ILA, or SXRD projector that can do 3D without ghosting/crosstalk issues.
And that I have to disagree with - ghosting is all to do with the 3D technology, not the display technology. If the separate eye images are projected without overlap, there is no ghosting in the image... but, if the 3D technology used cannot separate the images correct, then ghosting will be visible.
There tends to be more ghosting with Real-D for example, as well as with cheaper active systems.
The only time the display can cause ghosting is when there is a delay with screen image switching - causing the previous image to remain visible when the nest is displayed.
The switching time of most 'quality' display technology is below this threshold.
Light Illusion does a lot of Stereo 3D work, helping set-up post-production operations and production workflows for projects.
or there's too much control interaction between controls
That is an effect of the technology - cross-talk between the colour channels - a definition of poor RGB Separation, and is the exact issue I was flagging.
If you can't calibrate an RS55 or RS65 to near perfection with the internal controls (and to essentially complete perfection with a Lumagen Radiance processor) you don't know how to use the controls or modes... My results with the RS65 projector I reviwed are as follows:
Grayscale dEuv range: 0.6 or lower for 20% to 100% and 1.7 at 10% and 20%
Gamma Range: 10%-90%= 2.29-2.31 (I used 2.3 for my target Gamma)
Color dEs CIE 1994 & Luv
Red: 0.4 & 4.4
Green: 1.3 & 4.8
Blue: 0.75 & 8.4
Cyan: 0.9 & 3.3
Magenta: 0.2 and 2.1
Yellow: 0.4 & 1.3
And as I said, the Lumagen Radiance processor will further reduce the dEuv errors to well below 1 or 2. It is NOT the display technology that keeps the dEuv errors from being lower, it is how the projector's controls work.If the projector technology was incapable of lower dEuv errors, the Lumagen Radiance processor would have no effect, but Radiance can be used to make dEuv errors smaller. So the display technology itself is not the limiting factor. If you are using dE94 as your standard, the dEs re already low enough without the Radiance processor to be below the threshold of human vision. If you cannot duplicate those results with the current JVC models (RS55 & 65, not sure about the 45), you aren't using the right settings and may not be using the available controls to their best advantage. I've achieved those results with a dozen RS65 projectors... none of them has been different by more than a few percent here or there.
I'd be VERY interested in knowing exactly WHAT brands and models of LCD/LCoS projectors you have seen that do "perfect" 3D because I have Blu-ray 3D scenes that ALWAYS fail on EVERY LCD/LCoS projector and NEVER fail on any 3D DLP projector. I'm talking about Blu-ray 3D content as sent to the projector with an Oppo BDP-93 Blu-ray disc player (used because it is one of the top 2 or 3 Blu-ray players in regards to accuracy). No LCD or LCoS projector has produced non-ghosted 3D on all the torture test scenes I use (Hugo, Meet the Robinsons, The Polar Express, scenes from IMAX Dinosaurs Alive!, IMAX Grand Canyon Adventure -- and there are many others, but those are my "go to" titles). I use those discs for every projector review and DLP projectors always produce perfect 3D on every scene that the LCoS and LCD projectors fail on. Furthermore, the DLP projectors never fail anywhere on any disc that I've tried with them. This is a display technology issue and it has ZERO to do wih the content on the disc. If the fault was the content on the disc(s), the DLP projectors would fail in the same places (they don't).
There was some early discussion that light leakage through the 3D glasses was the issue and not the projectors, but the appearance of "universal" 3D glasses has completely elminated that from being a factor, because the "universal" 3D glasses will fail in the torture test scenes when used with LCoS and LCD projectors, but the same universal glasses used with DLP projectors produce perfect results in the same scenes that fail on the LCD/LCoS projectors. Furthermore, I have some "Alpha test" color leakage patterns for 3D glasses that have to be matched to the gamma of the projector... once you have the right set of targets to match the projector's gamma, you can evaluate how much leakage there is in % using these patterns (leakage is analyzed "per color" and it is very rare for glasses to leak equally in red, green, and blue). 3D glasses leakage ranges from 0.2% to about 12% (worst I've see so far). Yet low leakage number glasses used with LCoS and LCD projectors still produce ghosted images in the torture test scenes while high leakage glasses used with DLP projectors still produce "perfect" non-ghosted 3D images. This makes it indisputable that the display technology IS a factor in 3D image quality.
Sony's new VPL-VW1000ES 4K projector is the first SXRD projector to have the SXRD imagers driven digitally (all previous SXRD imagers had the digital signal converted to analog just prior to getting to the imagers - this is straight from Sony engineers). The 1000ES has the least amount of ghosting I've ever seen froim an LCoS or LCD projector, but it's still not perfect and it does still fail on some of the torture test scenes though it does "pass" on some of the scenes that give other LCoS or LCD projectors problems. But every DLP projector I've used here has no problems with the scenes the 1000ES produces ghosting on. The 1000ES projector produced about 20 instances of ghosting over the entire running time of Hugo (for example), each one lasting an average of 2 seconds (primarily because there was an edit or camera motion that changed scene content enough that the ghosting no longer existed. That means there was about 40 seconds of "bad" 3D during Hugo on that particular projector. If you convert the running time of the movie to seconds and divide, you get a 3D "score" of 99.47%: meaning 99.47% of the time, there was no 3D ghosting or other 3D failure to integrate the image (this includes time when only a portion of the image had a ghosting problem). Other LCD and LCoS projectors have had "scores" in the range of 95%-99%, the JVC RS65 was about 98.7% if I recall correctly. Every DLP projector has had 100% scores.
Note that the score for every 3D movie is not necessarily the same. Hugo tends to have lower overall scores when there are problems with any given projector. The IMAX titles and Meet the Robinsons tend to have higher scores, though DLP projectors still score 100%. Captain America & Part 1 of Harry Potter and the Deathly Hallows also tend to have lower scores when there are failures, primarily because the images are not as bright & vibrant as the movies that are more troublesome for LCoS and LCD projectors. Many of the 3D errors in Meet the Robinsons happen the first time the flying time machine arrives in the future. The motion in the scene can make it difficult to see the ghosting problems, but pausing the image confirms the problems (again, DLP projectors produce perfect 3D in the same spots even when the movie is paused).
So, once again, saying you can't make an LCoS projector accurate is simply wrong (as shown with the data from JVC RS65 projector review) and saying the 3D content is the (ghosting) problem rather than the display tech is also wrong as shown by the data from Hugo and the Sony 4K projector, the best 3D LCoS projector seen to date. And using the same universal 3D glasses with both types of projector and getting different ghosting results also confirms that the problem is with the display tech and not some other variable.Edited by Doug Blackburn - 6/14/12 at 11:22am