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Graphics > Image processing > Removing 3D per...
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Removing 3D perspective from photograph of picture with periodic

by Palle Uldenborg <palle.uldenborg@[EMAIL PROTECTED] > Jul 17, 2008 at 12:53 AM

Suppose that I have a picture, A, with a fairly consistent replicating
pattern. So the auto correllation function of A has fairly large
peaks. Now I take a black/white photograph of A, and I want to use
this photograph to reconstruct A. The problem here is that the photo
has extra 3D perspective, so I need to morph the photograph to get rid
of the 3D effect.

I guess that I have to do something like the following
 * Define a morphing function that morphs the photo.
 * Define a cost function that describes the cost of a morphed photo
 * Look for a global minimum of the cost

I know that the original picture had a replicating pattern, so I guess
that my cost function can be something like a weighted square of the
autocorrellation function of the morphed photo. I don't know much
about morphing functions. Should I use a function that desribes a 3D
perspective, or should I just choose something fairly general.
Whatever I do I probably have to worry about local minima of the cost.

In short this is a  summer holiday project, and I haven't done a lot
of  image processing before. I would be grateful for some good advice
and perhaps a few key words so I can do a google search. If you have
an idea for a good reference book, that ould also be good. I hope to
be able to do the code in scientific python.

             Thanks in advance

                          Palle
 




 3 Posts in Topic:
Removing 3D perspective from photograph of picture with periodic
Palle Uldenborg <palle  2008-07-17 00:53:00 
Re: Removing 3D perspective from photograph of picture with peri
aruzinsky <aruzinsky@[  2008-07-17 09:06:30 
Re: Removing 3D perspective from photograph of picture with peri
serg271 <serg271@[EMAI  2008-07-18 22:16:28 

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