On Mon, Dec 27, 2010 at 07:50:44AM -0500, Yuval Levy wrote:
> > For this project, the intital alignment looked fine. It was when I
> > removed the outlier control points and realigned when I ran into
> > problems.
>
> removing the outlier is a blind process as well. If you have, for example, a
> lot of features in the foreground that "captures" the majority of the CPs,
> the
> background CPs will be declared outliers, even if it is known that the
> further
> away from the camera a CP is located, the less sensitive it is to parallax
> and
> other negative factors. And if those front features are in movement, the
> statistics are toast.
Which brings me to an idea I've had for a while....
Control point finders are apparently quite likely to find a bunch of
control points in the foreground. Which especially with hand-shot
panos are quite worthless.
So after one run of finding control points and aligning the pano,
would it be possible to run a CP finder on just the overlapping image
parts?
The thing is we KNOW they are quite likely to overlap, so we can work
with less "outstanding" control points because the points we take only
have to be unique against the same image area on the other image, not
against all other parts of all other images!
And matching control points is also quick because we have only a small
set to match against.
This would really clean up the control points. One of the things we
could do to get an even distribution of control points is to put a 3x3
window on the overlapping area and try to find control points in each
of the nine areas.
Could this be a GSOC project?
Rogier.
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