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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Autofocus can't find stars

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So, the problem with my focuser not giving back its position isn't a problem for focussing. Autofocusing starts, a star is selected, it takes another picture around that star but than says HFR -1 and no stars found. While I'm clearly seeing it, nice and round already (manually I can focus) within the selection box.

How can that be?
7 years 6 months ago #10052

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i think that Jasem is currently working to improve the star finding algorithm.
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7 years 6 months ago #10054

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Replied by Derek on topic Autofocus can't find stars

I had an idea relating to the star finding algorithm while out running this morning.....

My telescope's field is not 100% flat so it would be great if the algorithm would favour stars midway between centre and edge of frame. Just a weighting in the algorithm or maybe something like that...

Actually could someone point me to the code? Is it in the indi codebase or kstars?
7 years 6 months ago #10058

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Ok, I must have missed that note, sorry Jasem. :) I also wondered if I could influence the auto-star selection in any way, yesterday (as a test of my new scope) I imaged Andromeda, but it selected Andromeda as a star.
7 years 6 months ago #10059

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It is using weighting algorithm now with adaptive threshold, but that's also not working in some cases, especially when SNR is low. I am working on gradient-based algorithm, but got swapped by other things. So hopefully in a week or two, I'll have something ready.
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7 years 6 months ago #10066

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So yesterday it worked great, might this be the newer routine?
7 years 6 months ago #10094

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