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.
For info on FrameWorks, contact Pip Chodorov at <email suppressed>.