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Hamed Ahmadi wrote:
>> It depends on the lense you use.
>> May  we have some details on the technics involved in this projection?
>>
>> Marc
> 
> Dear Marc
> 
> I don't have any special technic and i just wanna find a way to have
> a undistorted scene on a cylindrical screen with a ordinary projector.
> of course I prefer to do that by software modification not by hardware

	That's probably not possible. Sure you can find a software
transformation that will compensate the *distortion* (in fact, the
standard POV perspective camera should do it more or less), but your
main problem will be the *focus*. Ordinary projector have lenses
that only produce a sharp image on (or near) a certain plane. The
position of this plane may be adjusted, but it is always a plane.
This means that if your screen is a cylinder, you will have parts of
the screen which are in front of the focus plane and/or other parts
which are behind, and those parts will be out of focus and display a
blurred image.

		Jerome
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