Originally Posted by millerwill
My O my, but the passion this brings out. Amazing. It's really not a very difficult calculation, based on whatever definition of visual acuity one takes. It would be interesting to see what you fault with this chart, and what you would suggest to replace it.
There is no chart that that can tell anything about 4K or the the quality of 4K or any other resolution.
Just the fact that a close-ups in any resolution will look sharper and show more detail than a wideshot and that all video changes between wideshots and close-ups frequently through a program/movie should tell you that no chart would be even close to tell anything about image quality.
In addition comes cameras used, post treatment, contrast lighting etc. etc.
All will have an impact on how much perceived detail, sharpness and over-all image quality.
Up to a certain distance where everything becomes the same, seating distance will have very little to say about the image quality.
The seating distance will always be what people find is comfortable distance to the screen and the practical size of the room. Some people like to watch at "in your face" distances, other a little further away.
No chart or measure can tell anything about where people will watch 4K or their experience of improved quality.
The only thing a distance measure can tell is when do you still see the individual pixel or when you don't.But nobody is watching a movie to watch pixels, we are watching the image the combination of pixels create for us.
And at this stage of life I am not threatened by looking like a fool; it wouldn't be the first time.
At least now you know the validity and origin of the chart.
I am just getting frustrated that people all over the world are posting that chart (and have done so for years) without doing a minimum research to find out where it it originated.
I am sure most people have thought the chart came from some serious research on resolution and seating distances from the likes of NHK or ARRI.
If I hadn't been so lazy I should have checked and counted just how many times that chart have been posted in this thread alone. Wouldn't surprise me that it have been posted more than twenty times since the thread was started back in January 2011.
Even this chart which is made by ARRI in a serious paper on 4K (mostly about film scanning) is just a theoretical chart made before there where any 4K or 8K projectors or TVs. ARRI has still not managed to make a 4K camera, even though they did push 4K heavily once upon a time.
And in the end, seating distance and perceived image quality of 4K vs 2K will be a subjective experience, depending on each individual watching.
Sadly the link adress at the top of the chart is dead.