Possible bug in star alignment module

[gvanhau]

Hello
Since the release of the new star alignment module, I'm having a regular strange behavior:
One of the aligned images is not aligned to the rest of the set.
PixInsight version is 1.8 RC7
I attached a preview (from blinking) of a set I am processing now.
You can clearly see that the stars are not equally spaced from the borders.

Until now, what I did was realigning the faulty image using dynamic align but Vicent  Peris told me to report it.


Regards
Geert

[Juan Conejero]

Hi Geert,

My stake is that this is a star detection issue. To say something useful, I need the images. Could you upload three of them, including the one that does not align?

[gvanhau]

Hello Juan

Y used the Pixinsight file sharing for this.
I uploaded 3 files:
http://endor.uv.es/files/data/public/ee8a74.php
http://endor.uv.es/files/data/public/2ce55e.php
http://endor.uv.es/files/data/public/6c2c67.php

file ending with 002Ha-14 is the one with problems.
file ending with 005Ha-25 was used as reference

I sent you  a pm with password
Regards
Geert

[Juan Conejero]

Hi Geert,

Thank you for uploading the images. There is no bug here. The _14_c image has bad focus, and StarAlignment with default parameters detects very few stars.

To align this image correctly, change the following parameters (Star Detection section):

Peak response = 1
Maximum distortion = 0.1

Anyway, you'd better discard this image from your data set, since it will damage your final result.