Tuesday, September 29, 2015

Is it Possible to See UHD Detail at HD Distances?

   Conventional wisdom says no, but many AVS members claim to see the increased detail of UHD at distances more suited to HD. What say you?
   Human visual acuity is limited; those with normal vision can generally distinguish details that subtend an angle of about 1 arc-minute, or 1/60 of a degree. As a result, conventional wisdom says that most people cannot see the increased detail in a UHD (3840×2160) image when the screen is located at a distance more appropriate for HD—say, three times the screen height or more. At that distance, details occupying a single UHD pixel subtend an angle smaller than 1 arc-minute, which means no one should be able to discern them, and the image should look no more detailed than 1080p. According to this idea, one should sit at a distance of 1.5 times the screen height to see all the detail in a UHD image.
   However, I’ve seen comments from many members of AVS Forum who claim they can see the increased detail in a UHD image at distances that should make it impossible. Is this actual perception, expectation bias, or something else?
   What do you think? Is it possible for some people to actually see the increased detail in UHD at HD-appropriate distances? Or are those who claim to deluding themselves? What is your experience in this regard?

source: avsforum.com