Posted by
Joachim Wesner on
Dec 23, 2009; 12:27pm
URL: http://imagej.273.s1.nabble.com/Spherical-autostitching-tp3689939p3689941.html
Hi Johan,
thanks for your comments! I will look into it. Only to further clarify the
scope, it´s only a reconstruction of something similar to "surface
texture".
Image you have a collection of satellite images of the surface of the
earth, taken from pretty distant, so that the image is neither flat, but
the inclination of the surface relative to the point of view is
significant, but it´s usually also not a full semisphere in view. What the
problem would be, translated to this case, that you do not know where the
individiual satellite image was taken, you only know the distance, which is
usually fixed for a given sets of measurements, but in can be from any
orientation around the globe.
Actually, it would be a 3D reconstruction, but in my cases the "texture" is
small deviations from the exact sphere, so it acts like a "texture"
Actually it already exists for cases where the poistion of the "images" is
almost exactly known, you only do a fine tuning and some error compensation
in what would be the "satellite camera",
it´s calles "subaperture stitching interferometry", but IMHO nobody has
till now tried this for unkown orientations around a full sphere.
http://qedmrf.com/documentView.asp?docid=623http://qedmrf.com/documentView.asp?docid=191Sincerely, Merry Xmas and Happy New Year!
Joachim
Johan Henriksson
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On Tue, Dec 22, 2009 at 2:18 PM, Joachim Wesner <
[hidden email]> wrote:
> Hi List,
>
> what is the status about (open) ImageJ plugins (or hints for algos) for
> autostitching?
>
trackem2 should always be mentioned here. I think it only does translation
and some warping (see site, haven't tried it yet).
then there is xuvtools but it was buggy when I tried it. they claim it to
be
better than Imaris at least.
>
> In my case, I would have the special problem that I want to stitch many
> (even noisy!) images of a close full sphere surface (each image has only
~
> 1/4 of the full surfrace) at random orientations, i.e. even after
> correction for the curvature it would not only be a translation but a
> random orientation.
>
> Anybody "been there, done that"? Hints?
>
it's not obvious to me what you expect the output to look like. you want a
volume out of this or just aligned images? microsoft research has their
massive photo assembler which is the closest I recall to just aligning
images in 3d.
for volumes, well, there is the work on assembling SPIM images (rotated, a
little translated) for zebra fish but this assumes you have quite a number
of images. their algorithm requires that beads are placed a bit everywhere
to find the position.
/Johan
>
> Most sincerly
>
> Mit freundlichen Grüßen / Best regards
>
> Joachim
>
>
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Johan Henriksson
PhD student, Karolinska Institutet
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