Re: [photo-3d] Re: Algorithm Wanted

["Dr. George A. Themelis" <drt-3d@xxxxxxx>]

Bruce, sorry... I had assumed that you could digitize
the pictures and were looking for a numerical algorithm
or the principle on how to solve the problem via a
computer.

You asked if any three points would do it.  These
points must be in different depth levels.  If you could
pick foreground, middle ground and background, that
would be ideal, but you don't know what these are.
If the pictures are digitized then you could pick
a lot of points and run some kind of optimization
routine.

Now, in practical terms this problem has hunted me too.
Quite a few hyperstereos from Grand Canyon had a small 
rotation and shift. I was rotating one chip trying to 
see if this made things better and had hard time figuring 
it out.  That's because with small rotations the vertical 
displacements are very small.

Anyone who has tried to align such slightly misalignment
pairs will, no doubt, sympathize with me :)
 
George