Originally Posted by LowellG
I agree, that's a horrible demo. It's the IMAX Underwater; the fish pop off the screen which is what I think they want to emphasize, but the quality is awful. Plus the edges are all blurry. Then they show a 3D basketball game that's not impressive. I really want to like the TV, but I can't. I don't know if they have implemented the software upgrade they talk about that supposed to fake 1080P. I also wonder what there 9800 model will look like. I think it's a thin bezel like the Samsung D8000
A couple of comments/speculations:
First is that the LG passive sets (and others that use their FPR film, incl. Vizzio passive 3D sets, and Toshiba's passive set) will show ghosting if you are non-trivially above or below the perpendicular of the set. I would guesstimate that being within 10 degrees is fine, but being more than 15 degrees above or below will lead to significant ghosting. Basically this is due to the FPR film being slightly in front of the actual LCD display, and if you are too far above or below the perpendicular, the alternating polarization lines of the film become partly misaligned with the content lines. (It's perhaps possible that the different brands have slightly different distances between the film and LCD display, but I think all of the above brands would be basically similar in this regard....) This was an issue at the Best Buy where I saw the LG demo - the aisle was narrow, and so you couldn't get more than about 6' away from the screen. And unless you crouched, your head was too high above the screen. Things worked pretty well when I was kneeling, but then I was really too close to the screen (not to mention blocking the aisle....)
The second comment is that 3D content seems to "work" best if there is very good depth of field (or depth of focus), in the original shooting of the content (even if it is shot in 3D). In the underwater scene of LG's demo, when the big fish really pops out in the foreground, it is reasonable to assume that this was very challenging in terms of having the sharp focus extend too far in the background. Camera optics are still camera optics. Especially in the relatively low light of underwater filming, if you are doing close-ups, and the camera(s) are focused on something in the near foreground, background objects are likely to be blurred, in BOTH of the 3D-camera images. So your eyes will detect that the background is indeed in the background, but the image in the background will still be blurred.
In 2D content, the fact that there is blurring of distant objects when the camera is focused on a near object, is expected, and no big deal. We look where the camera is focused, and don't worry about the out-of-focus parts. But with 3D content, especially when demo-ing a set, and watching critically, I think we tend to do more "looking around" the larger image, instead of focusing where the camera is focused. And then we are more bothered by background objects that are blurred.
The same issues tend to apply in shooting indoor sports, where you are reliant on artificial lighting. It still requires some degree of opening up of lenses, leading to poor depth of field. Basketball suffers from this. If focused on the court, then fans in the background (and perhaps foreground) will be blurred.
On the other extreme, things filmed outdoors, where the lenses can be stopped down, leading to very good depth of field, will tend to turn out better in 3D.
In the case of the LG demo, I think that at least some of the issues are related to the content, and the difficulties of shooting in lower-light situations.
Anyway, that's my theory, and I'm sticking to it!
As an aside, I downloaded the latest SW for my LG 55LW5600, which MIGHT have their new algorithm that essentially flip-flops between the odd and even rows of content, in terms of what is displayed on the odd/even rows of the screen. I only spent a few minutes watching some 3D content after downloading (some of the time watching a replay of winter X-games on ESPN 3D, and some of the time watching some flying-related content from Comcasts "3D event" channel). I didn't see any dramatic improvement, but then I've thought that the resolution loss wasn't that noticeable to begin with. (Of course you can see the lines of the FPR film if you get close enough, but that is a slightly separate issue, and not effected by the algorithm). Actually, since ESPN 3D is top-and-bottom format, I would expect no improvement there, since the content is already "line limited". But the side-by-side format of the flying movie would possibly be affected by the algorithm. But the problem there was that I've never seen that content prior to the download. In any case, no ghosting with either the X-games content nor the flying!