Re: Inverse Distortion Correction

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Ran Yakir (rany++at++rtset.co.il)
Mon, 3 Feb 1997 05:46:13 -0800

On Feb 3, 6:53am, WILLIAM_MARINELLI++at++ntsc.navy.mil wrote:
> Subject: Inverse Distortion Correction
>
> I seriously doubt this has anything to do with performer but I have
> alot of respect for the participants here, many of whom have helped me
> here a number of times. I just started your Monday with flattery,
> you're welcome.
>
> We have some dome simulators in which the distortion correction is
> done in the image generator.
>
> There is some interest in having the out-the-window scene (5 channels)
> Tee'd off to a sort of ops center. In that case, "flat" video would be
> great. I know, why not do the distortion correction in the projectors
> instead of the IG? Unfortunately, we may have painted ourselves into a
> corner on that one.
>
> Do you suppose it is possible to get something like an O2 and write a
> program that (1) reads a video signal from a distortion corrected
> image and then (2) loads the frame buffer with the corresponding
> uncorrected image?
>

Loading video signal into texture on O2 is quite fast, but I'm not sure that
the overall performance (loading video & drawing the texture undistorted) will
be good enough. The O2 is very fill limited, so you'll have trouble drawing to
a large window. Also, the video comes in fields. If you want to work 60 Hz,
you'll have to load fields. Otherwise, you can load frames at 30 Hz.
I'd assume that on 30 Hz, drawing to a video sized window, you can do it.

Ran

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