Quote:
Originally Posted by haertig
Actually, I was going on about 720p being right at the edge of human eye resolution for a 70" screen, when viewed from 12.5' away.
To set the record straight, I should have said 65". That was my mistake. We used to have a 70" 1080p TV, but replaced that with a 65" 4K TV. Not because we wanted the higher resolution, since that is totally wasted at our viewing distance. But there are more choices for TV's today (feature-wise) in the 4K arena.
Do you have a screen larger than 65"? Do you sit closer than 12.5'? If so, then the human eye can indeed resolve more than 720p. You have to look at screen resolution, ... and screen size, ... and viewing distance. I was stating the resolution limits of the human eye for my specific viewing setup.
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55", eyes about 4' from screen.
The point GeoffR and I were making is that picture quality is barely no longer seriously degraded when pixels have just become unresolvable. PQ continues to improve as pixel size decreases. For example, a 1 pixel wide black line on a white background will be black if it is registered with a line of pixels, but it will be mid-gray and double width if its midpoint is between two lines of pixels. But on a display with twice the resolution of your "limit of usefulness", the line will be black and the proper width.