The framerate thing is quite important, I don't think parting gifts are in
place here... Besides, the more people tell me to stay off the framerate/eye
thing, the more I will nag (I'm sorry, it's my nature)...
Anyway, thanks for replying in a orderly fashion without claiming the
subject to be all dead and finished...
The eye is a very complex sensor, and it responds differently on different
inputs. For instance a flash from a camera is detected, even when the pulse
is very short (1/200th of a sec). The changes in intensity gives probably
the fastest respons... This kind of vision isn't very important in race car
driving.
The eye responds to movement in the peripheral vision (in other words the
sides of the track, kerbs etc), but I doubt this kind of vision to be
sensitive to 75 fps instead of 30 fps. The periphery vision is a very
important part of race car driving viewing techniques... The focus zone is
the most sensitive part of the vision, perceiving colour, text, changes etc.
Still I doubt that the eye would be able to tell the difference between 30
and 75... I have never done any experiments or read any scientific article
on the matter, but this is how I think intuitively it is, for what that's
worth.
My bottom line is: The higher the framerate, the better. The best is to sit
in that race car and drive, this would make the eye work at its best!
Anyhow, I think the flicker etc that we're talking about is monitor effects,
not framerate and eye effects. A low monitor refresh makes the single
pictures fade. "Fade" means change in intensity, and the eye is extremely
sensitive to this. A monitor with high refresh (120hz) and low frame rate
(30 fps) will give quite different results than say low refresh (60 hz) and
the same framerate (30fps). It's the refresh/framerate interaction that
makes the visiual quality. With a 120 hz refresh, the monitor would be
capable of drawing the 30fps picture four times, and this would yield a rock
steady image.
Tell me if I'm wrong...
---Asgeir---
> Bzzzt... thanks for playing, we have some lively parting gifts for you.
> =)
> 10-14fps gives the illusion of motion for a series of frames, and is the
> range usually used by cartoons which are often 12fps. This turns into
> the perception of smooth motion somewhere in the mid 20's, right at
> about the speed most movies (at least in the US) are shown, that being
> 24fps. However the human eye is able to visually detect flicker usually
> up into the 75-80fps range, and this upper limit is not coincidentally
> pretty close to minimum recommended 75Hz refresh rate for your monitor.
> It has also been shown through research (one such study at the Eye
> Research Institute in Boston a few years back) that 1/200 of a second
> (200fps) is the threshold for physiological response to visual stimulus.
> Eric
> >There's no need for frame rates above 30, simply because the eye can't
> tell the
> >difference between 30 and 50 fps...
