Re: Converging lenses (was: Window reversal); D|s-TortiO|\|s

[P3D Gabriel Jacob <jacob@xxxxxxxxxxxxxx>]

>How about you want it to look like a picture on the wall at an oblique angel
>to you the viewer? Keystoning is a natural 3D cue and can be used
>effectively as such within stereoscopic 3D as well. It is one technique for
>compressing a sense of depth into an area where you may not have a lot
>available due to other considerations such as relative depth of other
>objects. I guess this relates more to image compilations than solo photos.

Yes, sounds like a good idea, and might be an interesting way of
creating the effect of an oblique angle wall. It would be an avenue
to explore (if no one hasn't already) since this is similiar to what 
is done to correct for perspective in converging verticals of
buildings by using adjustable lenses on 2D cameras. It's usually
used to make the lines parallel, but of course can be used to
accentuate convergencance of the lines in images.

In this sense the distortion could be used to good effect, if the
convergence of the camera and image is done to both left and right
images appropriately. What I mean is, using twin cameras or a single
camera, take the first image at a certain angle, then instead of moving
a few inches sideways and only toeing in, one might have to move
the camera forward or backward to keep the distortion constant in the
left and right frame to achieve the oblique angle. This is rather uncharted
waters (as far as I know) and a brave new frontier! Who knows, maybe in
that sense, keystoning could be taken advantage of!

Gabriel


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