On Sun, 18 Feb 2001 00:43:58 GMT, "tim makey" wrote:

>Ok i have a trv900 and a century optics fisheye which gives me a shot about
>about 148 degrees wide horizontally . I am happy with both.
>I am however looking to reduce the barrel distortion caused by the lens.
>Currently i am xtracting frames and running dewarping the individual frames
>and then recompiling the frames back into video.
>Wow it takes a long time.
>Like 40 hours for 1 hour of video on my
>Amd600
>Is there a video plug in for premier that will do it directly to the video
>file ?

If it maintained the angular width, you would lose
edge/corner image area + the corners would be enlarged
and would therefore be quite soft. It should be easy
(for people into this...;-) to write a filter that
does what you want, since it is a simple reverse-spherical
perspective (pincushion). Try the "lens distortion" filter
(first one) in Premiere - though this will also narrow the
angle of view...

>I have searched and not found one
>Another solution would be to use a better lens.
>I have heard about some asphereical lenses that are supposed to be really
>good and barrel distortion free

*Very* wide angles of view (around 140 degrees horizontal)
are nearly impossible to do without spherical-perspective
instead of rectangular - any add-on that approaches 90
degrees horizontal coverage will have some barrel
distortion. BTW, this is not a bad thing - it is kinder
to people-imaging and to viewers when the camera is panned
or tilted...;-) (More on "Perspective and Seeing" is on my
web page, under "I babble"...)