On Tue, Dec 28, 2010 at 12:10:13PM -0500, Yuval Levy wrote:
> On December 27, 2010 08:32:49 am Rogier Wolff wrote:
> > Control point finders are apparently quite likely to find a bunch of
> > control points in the foreground.
>
> no - there is no particular likelihood. they find CPs indiscriminately on
> the
> whole surface of the picture without any depth information.
You're right. But with "apparently quite likely" I meant: "it happens
in practice". I often get lots of them in the foreground. Apparently
the grass has higher contrasts or something resulting in a preference
for those control points.
> > 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?
>
> I see no benefit in this. There is no guarantee that in the part of the
> image
> that is overlapping depth is distributed any better than in the rest of the
> image; and parallax would have to be really massive to keep the identified
> foreground features out of the overlap area.
What I meant is that from a preliminary optimization, the overlapping
areas of two images is aproximated. Next cpfind would be asked to find
key/control points in JUST this overlapping area. The sieve1*
parameters would ensure that we get a uniform blanket of control
points over the overlapping area of these two images.
Roger.
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