Am 13.04.2011 16:33, schrieb paul womack:
You can only retro-correct perspective if the subject is flat (2D);
the facades of many building are (close to) 2D, so this is feasible.
If you alter the perspective (implicitly altering the point where the image
was taken), and there is genuine perspective in the image
(lots of 3D objects ate various distances) it all goes wrong.
Sorry, this isn't true. Panotools and hugin can be used to perfectly
simulate a shift lens (perfect in terms of geometry, not DoF). If you
shoot f.e. above horizon with a shift lens you keep the sensor plane
vertical (not tilted). That's why horizontals stay horizontal. The
perspective isn't altered. As long as you shoot the source images for a
mosaic from a common viewpoint (the no-parallax-point of the lens), you
can get exactly the same. Only the focus plane (and hence the DoF) is
tilted.
See http://wiki.panotools.org/Perspective_correction for details.
--
Erik Krause
http://www.erik-krause.de
--
You received this message because you are subscribed to the Google Groups "Hugin and
other free panoramic software" group.
A list of frequently asked questions is available at:
http://wiki.panotools.org/Hugin_FAQ
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at http://groups.google.com/group/hugin-ptx
