Quote:
Originally Posted by Garbz
Hey Rick I'm getting no where with StarAlignment. It finds some 1000 stars, selects a bunch of the brightest ones and then starts the RANSAC thingamabob. It finds about 10 putative star pair matches, and then fails and tries again and goes through that about 16 times and then throws an error.
I haven't figured out any setting that will actually let it find a matched pair of stars. I'm beginning to wonder if there is something bizarre in my subs.
If you at all have a moment would you be able to take a look and see if you can find some-way of making these two images align?
http://www.garbz.com/hamfail.fit
http://www.garbz.com/hamref.fit
By the way do you debeyer before registering? |
Hmmm... works for me? I took the two files, Debayered them both (default parameters) and then ran a star alignment with the ref file as the reference image and the fail file as a target (default parameters again) and it ran fine:
Quote:
StarAlignment: Global context
Reference view: hamref_RGB_VNG
Structure map: done
Detecting stars: done
533 stars found.
Registering target image 1 of 1
Target view: hamfail_RGB_VNG
Structure map: done
Detecting stars: done
435 stars found.
Matching stars: done
336 putative star pair matches.
Performing RANSAC: done
315 star pair matches in 5 RANSAC iterations.
Summary of model properties:
Inliers : 0.938
Overlapping : 0.924
Regularity : 0.947
Quality : 0.919
Root mean square error:
delta_RMS : 0.266 px
RMS error deviation:
sigma_RMS : 0.114 px
Peak errors:
delta_x_max : 1.318 px
delta_y_max : 0.663 px
Transformation matrix:
+1.0004 -0.0021 -43.0781
+0.0018 +1.0000 +115.1004
+0.0000 -0.0000 +1.0000
scale : 1.000
scale-X : 1.000
scale-Y : 1.000
rotation : +0.10 deg
dx : -43.08 px
dy : +115.10 px
Generating registered image: hamfail_RGB_VNG_registered
Homographic Projection / Lanczos-3 interpolation, c=0.30: done
Registration successful.
===== StarAlignment: 1 succeeded, 0 failed, 0 skipped =====
12.35 s
|
I can't think of any obvious reason why this wouldn't work for you. I'm running 1.08.02.1098. Maybe you could try exactly what I did and see if you get the same results? I set up the reference and target images as views rather than files. Nothing else magic about what I did.
You must debayer before registration. Registration will move the pixels around and loses the correspondence with the Bayer matrix.
Cheers,
Rick.