On Thu 19-Apr-2012 at 23:13 +0200, Erik Krause wrote:
Am 19.04.2012 22:36, schrieb Bruno Postle:
I recently added a new tool called 'ptomorph' to Panotools::Script
that helps with stitching Hugin panoramas with parallax errors. To
give an idea of what it does, here is a 'before and after' example
of a handheld panorama with quite a lot of stitching errors:
http://www.flickr.com/photos/36383814@N00/6948262808
Very interesting. What is the difference to the old panotools Morph-to-fit?
The panotools morph-to-fit isn't available in Hugin/nona...
Panotools also uses a not-very-nice distortion where it splits the
image up into triangles and performs an affine transformation on
each triangle separately, so you get steps between adjacent
triangles (I believe, I haven't looked at it for ten years or
something). The ImageMagick morph is a 'rubber-sheet' distortion,
so it is much smoother.
The reason morph-to-fit was never implemented in Hugin is that there
were obviously better ways of doing it.
Panotools also uses a whole separate interface, control points are
specified with 'c-lines', whereas panotools morphing uses 'C-lines'
and these have a completely different format. ptomorph just uses
the existing normal 'c-lines'.
These 'C-lines' seem a bit superfluous to me, though I suppose there
are circumstances where you might want to control morphing with a
reduced number of points - I'm not sure if there ever have been any
tools that support a reduced set like this.
--
Bruno
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