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CFA Channel Alignment


(@jeffreyhorne)
White Dwarf Customer
Joined: 2 years ago
Posts: 15
Topic starter  

It would be awesome to have something like this in APP, for us OSC imagers. 🙂 


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(@wvreeven)
Galaxy Admin
Joined: 4 years ago
Posts: 1651
 

@jeffreyhorne Hi Jeffrey. Have you ever noticed the "align channels" checkbox at the bottom of tab 2?


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(@jeffreyhorne)
White Dwarf Customer
Joined: 2 years ago
Posts: 15
Topic starter  

@wvreeven I love APP more and more each day. Thank you so much!


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4736
 

It's indeed not very obvious, but using that option and saving the subs separately might fix this indeed.


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(@col)
Red Giant Customer
Joined: 1 year ago
Posts: 111
 

@jeffreyhorne

APP has this for a long time. Align channels checkbox in Tab 2.

It also debayers your files, so once you save them you will have debayered, rgb aligned and calibrated fits files to stack.

Note: Once those saved files are loaded to app you don't need to check the cfa debayers option as it is already done. This works a treat for stars that are low in the horizon. 


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(@col)
Red Giant Customer
Joined: 1 year ago
Posts: 111
 
Posted by: @wvreeven

@jeffreyhorne Hi Jeffrey. Have you ever noticed the "align channels" checkbox at the bottom of tab 2?

Oops, didnt see the responses already😬


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(@jeffreyhorne)
White Dwarf Customer
Joined: 2 years ago
Posts: 15
Topic starter  

@cwm2col @wvreeven @vincent-mod so in order for this to work, do I need to check that box and re-save the lights, then start a new process and stack the new frames?

Thanks for all of your help!

Jeff


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(@jeffreyhorne)
White Dwarf Customer
Joined: 2 years ago
Posts: 15
Topic starter  

@cwm2col @wvreeven @vincent-mod also, since that check box is located in the Calibration tab, does that mean when I re-load the newly Aligned frames, I don't need to re-load calibration frames?


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(@col)
Red Giant Customer
Joined: 1 year ago
Posts: 111
 

@jeffreyhorne

Yep. Once you tick Align channels and you have your calibration frames loaded, saving (calibrated) light frames box will give you a set of calibrated and rgb-aligned lights that will also be debayered.

Then you clear out the file listing and load those saved files as the new lights, without any calibration frames/masters, ignore the force bayers/CFA in tab 0 and just proceed form there


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(@col)
Red Giant Customer
Joined: 1 year ago
Posts: 111
 

I forgot to add - this option not only helps with rgb colors on some stars etc., but it is useful in other ways.

I do this to calibrate, color align and debayer a session from one night. And I do this for another session, with its own calibration files. Then, when I have enough data, I just need to load all the aligned, calibrated and debayered lights without having to worry about loading flats/darks etc for each session (although app does that very well too).

I then get all the benefit of the rejection statistics for lots of frames by processing all the lights in a single integration. 


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(@jeffreyhorne)
White Dwarf Customer
Joined: 2 years ago
Posts: 15
Topic starter  

@cwm2col this is all SO very helpful. Thank you so much!

So, I have ~100 frames. I'll load all of my lights and calibration frames, select "Align Channels" and then "Save Calibrated Light Frames". 

Then start a new process of APP, load only the newly calibrated/aligned light frames, and proceed to star analysis, registration, normalization, integration, etc. Sound right?

Thanks again!

Jeff


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(@col)
Red Giant Customer
Joined: 1 year ago
Posts: 111
 

@jeffreyhorne

Yes, that is what I do and works perfectly. I force the bayer pattern option in Tab 0 on the first go, then ignore it on the second go since the files will be debayered then.


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(@wvreeven)
Galaxy Admin
Joined: 4 years ago
Posts: 1651
 

@cwm2col Thanks very much for sharing your extensive knowledge here, Colm!


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(@col)
Red Giant Customer
Joined: 1 year ago
Posts: 111
 

@wvreeven

Happy to help, although there is a sticky on the channel alignment somewhere in the forum, that is where I learned what to do.


(@jeffreyhorne)
White Dwarf Customer
Joined: 2 years ago
Posts: 15
Topic starter  

@cwm2col Thank you so much. So very helpful! 🙂 

Jeff


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(@jeffreyhorne)
White Dwarf Customer
Joined: 2 years ago
Posts: 15
Topic starter  

For anyone that might be looking for the sticky post about this:

 

https://www.astropixelprocessor.com/community/main-forum/colored-centering-of-the-stars/


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