Hi,
I've done a StarAlignment on a coupled of images I took some days ago. I worked on disk files and everything went smoothly.
Then I combined them with my KSIntegration script and after that I found that stars near the edges of the image have some cromatism, probably due to the lens used. So I proceeded to separate the RGB channels to align them. I fired up StarAlignment again, selected the views (not files!) I wanted to work with now (reference: green, targets: red and blue), and launched the process in the global context. This is what I get in the console:
StarAlignment: Global context
Reference view: kappa_sigma_200_G
Structure map: 100%
Detecting stars: 100%
2977 stars found.
Registering target image 1 of 2
Target view: kappa_sigma_200_R
Structure map: 100%
Detecting stars: 100%
1437 stars found.
Matching stars...
* Reference image: Limiting to 2000 brightest stars.
879 putative star pair matches.
Performing RANSAC...
723 star pair matches in 321 RANSAC iterations.
Root mean square error:
drms : 0.267 px
Peak errors:
dXmax : 0.706 px
dYmax : 0.654 px
Transformation matrix:
+1.0004 +0.0000 -1.1628
-0.0001 +1.0006 -0.8077
-0.0000 +0.0000 +1.0000
Generating registered image
Homographic Projection / Bicubic Spline Interpolation: 100%
Registration successful.
*** Error: kappa_sigma_200_R: Unable to determine an output directory.
*** Applying error policy: Continue on error.
Registering target image 2 of 2
Target view: kappa_sigma_200_B
Structure map: 100%
Detecting stars: 100%
3797 stars found.
Matching stars...
* Reference image: Limiting to 2000 brightest stars.
* Target image: Limiting to 2000 brightest stars.
1493 putative star pair matches.
Performing RANSAC...
1439 star pair matches in 52 RANSAC iterations.
Root mean square error:
drms : 0.274 px
Peak errors:
dXmax : 0.704 px
dYmax : 0.706 px
Transformation matrix:
+0.9998 -0.0000 +0.5866
+0.0000 +0.9997 +0.3863
+0.0000 -0.0000 +1.0000
Generating registered image
Homographic Projection / Bicubic Spline Interpolation: 100%
Registration successful.
*** Error: kappa_sigma_200_B: Unable to determine an output directory.
*** Applying error policy: Continue on error.
===== StarAlignment: 0 succeeded, 2 failed, 0 aborted, 0 skipped =====
35.027 s
I suspect that some internal flag isn't being correctly (re)set, and the process thinks it's working still with disk files, but since this is the first time I use this tool, it's more than probable that I'm doing something wrong.
