3 replies to this topic

[Dominoes3442]

Hello,

 

I'm a beginner who recently started playing around with photo stacking using Siril. I recently took 180 wide field images around Draco constellation and ran them through Siril.

 

For some unknown reason, majority of them fail at registration phase and the error says something like this:  Cannot perform star matching: try #3. Image 180 skipped

 

Sure, there were some clouds, but Siril easily detects 100+ stars in all images, which I assume should be sufficient for registration.

 

Example of one failed image is attached. What can I try doing to resolve this problem?

Attached Thumbnails

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Edited by Dominoes3442, 23 April 2025 - 11:31 AM.

[BlueMoon]

If all your images are this bad, I can where Siril would have a problem. Your images need some serious clean-up. You don't describe how you processed them other than "ran them through Siril". Assuming you used a generic script at this point. Any background extraction? Gradient reduction? Deconvolution?  Stretching? Did you apply any flats?

 

Here a link to the tutorial for manual processing in Siril:  https://siril.org/tu...ls/tuto-manual/ Cheers.

[Dominoes3442]

Yes, it was basically the default script for processing with a master folder. I used dark, flat and bias frames. Just to note that the screenshot showed auto stretched preview, linear is much darker with only stars being clearly visible. I didn't have that much issues with my previous photos, or at least they didn't have such a high registration failure rate.

 

I thought gradient reduction is supposed to be done after stacking.

[BlueMoon]

 

Yes, it was basically the default script for processing with a master folder.

The scripts generally work well with images that aren't problematic. I'd suggest you may want to manually process these so that you have better control over how Siril operates on them. Manual processing allows you to manually select stars for registration instead of using the registration parameters encoded in the script. Cheers.