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To: andreas_wonisch who wrote (18239)11/8/2000 10:17:37 PM
From: fyodor_Read Replies (1) of 275872
 
<Andreas: The human eye can't differentiate more than ca. 30 pictures per seconds so you won't notice that either although it's there and can be measured.>

That's the biggest Urban Legend of them all. And it's utter BS. There is NO question that the human eye can tell the difference betw. 30 and 60. Or 60 and 90. Or 90 and 120. I've seen it tested. I've tested it myself. I've talked to a couple of biology profs at the University here.

The myth apparently stems from the fps that movies use. However, they employ some pretty fancy blurring techniques to get the frames to look smooth. There is, however, also a big difference between "smooth" and "smooth" ;)

The myth was massively propagated by a number of childish gaming sites about a year ago. A very few sites tried to fight the onslaught and enlighten the people, but to little avail.

If you want to discuss the biology behind all this, I'm perfectly willing to do so (although I'd have to go talk to a couple of people again ;)). IIRC, the eye has two basic different types of receptors, located mainly in the periphery and the center, respectively. One kind is very good at distinguishing colors, the other motion. The one that distinguishes color has a longer optical nerve path delay (time from incidence of photon to signal reaches brain).

The human eye is perhaps one of the most underestimated parts of our bodies. Did you know that it has a sensitivity of 10s of photons? A sensitivity that has only recently been reached using non-biological methods.

-fyo
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