The human eye, and frames per second.

[Half Evil]

Here is the link, you may or may not find this internesting. I however liked it.
http://www.newton.dep.anl.gov/askasci/gen01/gen01025.htm

And if u dont wanna click the link. here you go.
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Question - Some guy I keep talking to argued with me that the eye
can only see an equivilency of 24 frames per second. But I do not think
that's a fact. When I rotate a sprite at 60 or 80 fps it is quite
different than that of 40 or 30 fps.

Can someone clear this up for me? Thanks.
----------------------------------------
When an image strikes the retina the nerve impulses last approximately
1/25 sec. This is why motion pictures appear to move continuously, even
though the number of frames/sec. is not extremely fast. This is also why a
TV screen does not flicker. If you have seen some "old time movies" from the
20's and 30's they appear "jerky" because at the time the technology did not
allow for frames to appear quickly enough to "fool" the eye, and the eye was
able to resolve successive frames.

There is another effect that may be coming into play also, and that is a
"strobe" effect. A strobe light flickers very short pulses of light at
variable controlled speeds. If some object is rotating in front of the light
at some multiple of the pulse speed, it will appear to stand still. If the
strobe light is speeded up or slowed down slightly the image will appear to
move forward or backward slowly.


<EDIT>
Just found this http://www.100fps.com/how_many_frames_can_humans_see.htm
and this
http://en.wikipedia.org/wiki/Frame_rate
and....
http://www.cs.ucl.ac.uk/research/higherview/mccarthy_video_quality.pdf
this is cool all in its self....
http://reviews.cnet.com/Labs/4520-6603_7-5020816-2.html
last thing for tonight...
http://www.sharkyextreme.com/features/article.php/1273571

 

[dyserq]

Interesting ... i never thought of my eye having a frame per second scale ... wow ... only 25 frames per second, technology has easily achieved a hundred frames per second rates

 

[Half Evil]

yeah no kidding.

 

[Lac3y]

Yeah, I was the one who thought that.

But I did some research and found that it is untrue:

http://amo.net/NT/02-21-01FPS.html

 

[David Lindon]

I always though it didn't work in 'frames'

Yes 1 light 'input' may only last 1/25 of a second but that does not mean that all 'inputs' hit the same time.

For example about the sprite, they may see the first part of the sprite and then the next part like 0.001 seconds later and the next part 0.002

therefore there are not 'frames' things are registered as and when they happen

 

[yellowsnowman]

it could be true, take this for example:

open up a book to any page, start reading it, then suddenly flick your eyes to somewehre else in your area, you may not notice it but you are blind for a very very miniscule time, thus showing that the eye doesn't have that many fps.

 

[Paradox1]

Well I dont believe there is a set one. That might have been on certain people. Everyone is different though.. *shrug* Can we ever really know everything about the human body?

 

[Kage]

Lac3y's article hit the bullet with me, and I can say that its probably true.

I mean if you look at the real world (not exactly in refresh rates of course), it is alot clearer and flicker free (of course) than a computer monitor at any refresh rate given at the moment.
That proves it really, doesn't it?

YellowSnowman, you did get to a good point about books and the fact of the imge staying there, but white bright light tends to. It doesn't mean we can't see that much FPS. It just that the light stays bouncing in our eyes for longer, so our brain is still seeing it.

 

[Half Evil]

Yeah, I was the one who thought that.

But I did some research and found that it is untrue:

http://amo.net/NT/02-21-01FPS.html

damn thats alot to read. good work finding it tho, lol, ill read it later tonight.

 

[Nik00117]

Um, TV runs at 27 FPS on cartoons which is slower then real poeple moving. So um, you can't see every little screen meaning you are seeing slower then you are watching.