FPR Resolution and Image Fusion
Because FPR TVs provide only 540 lines to each eye, it’s easy to see why many people (and some reviewers) conclude that FPR technology delivers only half of the HD 1080 lines resolution. That conclusion is reinforced when you walk up close to an FPR TV wearing Passive Glasses and see the gaps between the odd and even TV lines in each eye. But it’s not that simple because we watch TV from a far enough distance that the lines are not resolved and we know that the brain combines the images from both eyes into a single 3D image (the one we actually see) in a process called Image Fusion. Many people seem to get stuck on this particular issue and can’t get beyond it and think about what is really being seen in actual 3D vision.
The theory and fundamental principle behind full FPR vertical resolution and sharpness is that the 3D TV images have only horizontal parallax from the horizontally offset cameras, so the vertical image content for the right and left eyes are in fact identical – but with purely horizontal parallax offsets from their different right and left camera viewpoints. So there isn’t any 3D imaging information that is missing because all of the necessary vertical resolution and parallax information is available when the brain combines the right and left images into the 3D image we actually see. So as long as the viewing distance is sufficient so that the raster lines are not visually resolved (for 20/20 vision the visual resolution is 1 arc min, which corresponds to 6.1 feet for a 47 inch TV) the brain should fuse the images from the right and left eyes into a single full 1080p resolution 3D image. One important detail to note is that there are actually two entirely equivalent odd-even and even-odd line pairings for both the right and left FPR images, so both FPR TVs alternate between them at their full Refresh Rate. This also eliminates image artifacts that would result from picking just one pairing or the other.http://www.displaymate.com/3D_TV_ShootOut_1.htm