Group frames into p...
 
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Group frames into panels for mosaics  

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(@xplode85)
Brown Dwarf Customer
Joined: 1 year ago
Posts: 6
September 30, 2019 00:04  

I use APP a lot for Mosaics and it's pretty time consuming to stack each panel by itself first when doing 16 panels like i'm working on now, would it be possible to add a function to add all files and group each panel so APP would stack them all automatically without having to load each panel automatically?

This topic was modified 6 months ago by Vincent Groenewold - Moderator

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(@vincent-mod)
Quasar Admin
Joined: 3 years ago
Posts: 1416
October 1, 2019 10:42  

Remember the time when we didn't have APP to create mosaics so easily? 🙂 Thanks for the suggestion, I'm not sure if this can be done automatically as APP doesn't know what belongs to 1 panel by itself. Maybe Mabula (@mabula-admin) has an idea on it.


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(@xplode85)
Brown Dwarf Customer
Joined: 1 year ago
Posts: 6
October 1, 2019 10:57  

It's still not easy doing large mosaics...it's pretty hard to get a flat field with a 4x4 mosaic.

Here's something i cooked up pretty early in the project for M31, i still have to gather RGB, Ha and probably add 2-3x as much luminance.
There's no MBB applied to this.

image


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(@vincent-mod)
Quasar Admin
Joined: 3 years ago
Posts: 1416
October 1, 2019 11:25  

Did you use advance integration and LNC? Those should help with getting the frames equal. With easy I mean the calibration and registration, this used to be a process of hours/days just by itself before APP.

This post was modified 6 months ago by Vincent Groenewold - Moderator

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(@xplode85)
Brown Dwarf Customer
Joined: 1 year ago
Posts: 6
October 1, 2019 15:55  

Yes all panels were integrated alone at first, just throwing all into APP would takes ages with 16 panels with 12-24 subs per panel.
I didn't use LNC on the integrations, i will try that and hope it gets better.


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(@vincent-mod)
Quasar Admin
Joined: 3 years ago
Posts: 1416
October 1, 2019 16:10  

It should as that's one of the functions of it.


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(@yves_van_den_broek)
Brown Dwarf Customer
Joined: 3 years ago
Posts: 8
October 27, 2019 08:53  

I just asked this in the general section as well, this would be a huge time saver, please consider it. APP's strength is Mosaics, this feature would solidify it's lead in this area.

/Yves

 


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(@ralph)
Main Sequence Star Customer
Joined: 11 months ago
Posts: 28
October 27, 2019 11:03  

I remember reading on the fora here that plate solving is on the feature list for a future update. This would be an excellent basis for the requested feature.

If I'm not mistaken, the normal registration of N images takes order (N-1) registration actions, but for mosaic registration it takes order N * (N-1) / 2 registration actions. With 34 panels (may latest mosaic) that's still feasible, but with 619 exposures (the total number in my latest mosaic) it would take forever. With plate solving, only order N blind plate solving actions would be needed to know where each exposure (or panel) is located on the sky.

Blind plate solving would help immensely to automatically group exposures into panels, or even allow proper identification of the location, orientation and scale of all the exposures in a huge all-exposures-in-one-go mosaic.

I'd love to help think about a means to set this up. Just let me know @vincent-mod or @mabula-admin if I could help in any way. I've been playing extensively in the past with my own homebrew stacking software (though never got as far as mosaics or distortion correction).


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(@yves_van_den_broek)
Brown Dwarf Customer
Joined: 3 years ago
Posts: 8
October 27, 2019 11:07  

@ralph

We do not need plate solving for the individual stacks ... the coordinates are already in the single subs ... Could be nice down the road to help with speed and accuracy though ...

For now it would be sufficient I could load all the subs of a 9 panel mosaic in one go and get 9 stacks out of it, instead of loading them 9 times individual and wait in between ...

 


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