Re: Digital De-twisting?

[P3D Bob Wier <wier@xxxxxxxxxxxxxxxxx>]

|> > Will one of these new whiz-bang Stereo Software packages we've heard of
|> > lately allow one to easily remove rotational errors from single-camera
|> > stereo pairs?
|> >
|> 

The full frame stereo pairs on my home page were corrected for any
rotational errors by using Photoshop (kind of expensive to use
Photoshop purely for that, though). At any rate, I just threw across
a horizontal guide and aligned a given point(s) in both images
on the line, doing rotations as necessary. 

It's best to avoid doing this if possible, though since unless you
are lucky and need an integer number of pixels displacement, you'll
get re-sampling, which may fuzz the image a bit at extreme magnifications.
On web pages, though, it's not noticible.

http://calcite.rocky.edu/~wier

THANKS

               Bob Wier
         mailto:wier@xxxxxxxxxxxxxxxxx
  11:27 PM  Thursday, October 2, 1997
     Rocky Mountain College, Billings MT.
 keeper of the Photo-3d and Overland-Trails
mailing lists and the USA GPS Waypoint server 



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