Strazdas said:
Lightknight said:
The PPI is uniform regardless of how much you view of the screen. Basically, the PPI is all this chart is about since it's about the resolution in relation to TV size. It's the only reason why the distance where things matters changes.
Even if you were somehow focusing on the entire screen at once, the PPI would be the same as it would be if you were focusing on one square inch of the screen. That's because it's pixels per inch and as such remains the same as an average too.
PPI is uniform, but thats it seems that you are STILL not understanding. the chart is wrong because it assumes different PPI during viewing than it is in reality relative to your vision. it assumes that your focus point covers whole screen at said distance, whereas in reality it only covers part of it, and thus pixel density of focus point needs to be higher than the chart assumes to become unnoticable.
And thats only plainly seeing the pixels ignoring all other benefits of higher-than-visible resolution.
No, it doesn't. It assumes that regardless of your scope of viewing that you're still going to be looking at the same ratio of PPI. This is true regardless of if you are looking at 1 inch of the screen or the entire screen. If someone could magically focus on the whole screen all at once then they would still see the same distribution as if someone was focusing on only one part.
Because of this scalable factor (something you just conceded in acknowledging that PPI is uniform), none of the numbers would change if you changed the area of focus because that's not even part of the equation. If you're focusing at all 55" of screen you're still going to be able or not able to resolve the pixels at a given distance as you would if you're focusing on 1" of the screen from the same distance. Field of vision is simply irrelevant to the equation.
This is because, what you are resolving are the pixels. Not images on the screen.
the 300PPI average is false too. Average human can see up to 700PPI at those distances. what your doing here is just repeating some bollocks Apple was pushing to excuse its display resolution. or are you implying that PCMR is an actual physical master race superior to everyone else?
That is mathematically disproved in the source I linked. Perhaps you could do me the same courtesy and link sources if you're going to make a claim to the contrary?
I'll link it again below and now I'll even include commentary on the link to make it more convenient for your use. The author of this article is an expert in resolution who spent years calibrating the camera in the Hubble Telescope as part of his resume:
http://blogs.discovermagazine.com/badastronomy/2010/06/10/resolving-the-iphone-resolution/#.VFkOfhZVW_I
The following is a summary of the author's work I cited above:
Resolution is actually the ability to see two objects very close together. Resolution as we see it is actually measured as an angle. Because it is viewed as an angle, we can measure it in terms of distance. Think of the angle of the inside of one corner of a triangle that is opposite the two corners representing one object each, the narrower the angle in which those two objects can still be distinguished, the higher the resolution.
http://blogs.discovermagazine.com/badastronomy/files/2010/06/resolution_angles.jpg
So a 1 foot ruler that is 57 feet away would appear to be 1 degree across. If your eye had a 1 degree resolution then the ruler would appear exactly as 1 dot. Your resolution limit is when two objects appear to be one object.
Now, perfect vision is .6 Arcmin resolution. That's the number Soneira used to criticize Apple's comments. But the average vision is 1.0 Arcmin Resolution.
With 1.0 as the arcmin, any object that is 3438 times its own length away from you will look like a dot (so a quarter that is 1 inch across would appear as only a single point at 3438 inches away or a 1 foot ruler that is 3438 feet away would also look like a single dot. Closer and it looks wider, further away and it's still a dot. So you can use this math pretty darn easily to figure out how big an object must be before you can no longer resolve it. At 12 inches away, an object must be larger than .0035 inches before you can start to resolve it if you have average eye sight (12 inches/3438= .0035 inches). Ok, so how can we use this? Well, the iPhone 4 had a PPI of 326 pixels per inch. Well... 1/326 in is .0031 inches, which you'll note is smaller than the threshold of .0035 inches and so is unresolvable by average eyesight from 12 inches away.
Now, for perfect vision the resolution is .6 Arcmin. That means any object that is 5730 times it's own length would appear as a dot. 12 inches/5730 = .0021 inches. That is, of course, smaller than the .0031 inches size of the pixels in the iPhone4.
So while Soneira's claim holds water for people with PERFECT vision. That's really only relevant to 1% of the population. They can resolve up to 477 PPI, by the way, not 700PPI that someone pulled out of nowhere. Closer than 12 inches and those numbers go up, but not at 1 foot away.
So you are mathematically wrong here. No subjectivity in the house. I agree with a lot of technical things I see you say but this is just math and your numbers are wrong.