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gehelem / als

Astro Live Stacker
GNU General Public License v3.0
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dark region appears on top left of image when serie has a meridian flip #174

Closed deufrai closed 1 year ago

deufrai commented 1 year ago

Here is a result stack_image-2023-03-11-18-49-27-910548

comparison on 2 frames (before and after the flip), just after the alignment phase : isolated_before_after

What we can see : The flipped frame is actually translated by a large amount, and has no apparent rotation, which means it actually was rotated around 180° (it was captured after a meridian flip) details

What astroalign tells us : Image is translated by a large amount and rotated by approx. 360°. Transformation info gathered from here : https://github.com/gehelem/als/blob/release/0.7/src/als/stack.py#L361 And obvious here image

deufrai commented 1 year ago

"large amount" translation....

looks like faulty translations are actually 2/3 of image width each time...