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000777_owner-lightwave-l _Wed Apr 26 22:47:06 1995.msg
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Date: Wed, 26 Apr 1995 15:55:06 -0700 (MST)
From: Ernie Wright <ernie@gaspra.pd.com>
To: lightwave-l@netcom.com
Subject: Perspective matching
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Concerning a question about matching the perspective and other attributes
of a photograph, Gonzalo Garramuno wrote:
> You mention that setting the camera attributs should be easy. Since I
> have never seen neither Alias Sketch, Topas or the new 3D Studio, I can't
> figure out how this could be done "easily". What does the algorythm do?
> How would it work? What would it search for?
I was talking like a programmer. I meant that, once you HAD the camera
information, it *should* be easy to set it in LW through the plug-in
interface. For the algorithm, the user needs to know (or be able to
estimate) some small number of physical distances and angles and relate
that information to what's shown in the picture. The camera settings are
then derived from trigonometry and geometric optics.
- Ernie