From: Pip Chodorov (email suppressed)
Date: Wed Oct 31 2007 - 04:04:57 PDT
>
>
>It's interesting-- the fact that we don't see the dark strokes
>proves that optical 'persistence of vision' is a fallacy. If it were
>true, then the dark time would be readily apparent, as a dimming or
>darkness caste over the entire image.
>
>So why don't we see that? Why don't we amalgamate the dark 'images'
>the way we pile together the light ones?
>
The illusion of movement in cinema is not due to the persistence of
vision (by which all frames would mesh together in the brain) but
rather by the phi phenomenon. I thought this was common knowledge.
The phi phenomenon allows us to perceive those little blinking lights
around a theatre marquis as smooth movement.
A light that blinks on the left of the visual field followed by a
light that blinks on the right of the visual field will be perceived
as one light moving from left to right, provided that there is a 30
millisecond gap of black between the two flashes.
-Pip Chodorov
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For info on FrameWorks, contact Pip Chodorov at <email suppressed>.