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Stacking subs from 2 cameras in Pixinsight

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#1 dixiefla

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Posted 05 February 2023 - 11:30 PM

I have Subs on a Target for multiple nights, some using one ASI  mono camera and some using a different ASI mono camera with different file size and resolution. When I try to process them in Pixinsight using the batch preprocessor it yields two Master lights for each mono color Channel instead of one. It makes one master light for the higher resolution camera and one master light for the lower resolution camera for each color channel. This essentially means each Master only has half of the data whereas I want it to have all of the data. I have found no way to merge these two Master lights.

 

I have tried image integration and every other tool that makes sense. Nothing works. I have run the batch preprocessing again and it yields the same result- two Master light files instead of one for each color channel. A friend has told me that PI will merge Subs from two different cameras no problem but it does it during stacking. Not so with batch pre-processing.

 

How do you do it?



#2 pedxing

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Posted 06 February 2023 - 02:09 AM

Star alignment can support different image scales, then you integrate the aligned subs.

#3 dixiefla

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Posted 06 February 2023 - 10:03 AM

OK, I ran SA again and this time it seemed to accept all the files from both resolutions. I did the color channels separately. I did get lots of error messages about mismatched geometry,and "no stars found" when all the subs clearly had hundreds of stars. And for example in my blue channel it said 47 successful, 21 rejected. Well I had run all these thru blink first and they all looked good. So I dunno what the errors are about.


Edited by dixiefla, 06 February 2023 - 10:55 AM.


#4 pedxing

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Posted 06 February 2023 - 10:56 AM

You use the xisf files for normal integration. If you want to do drizzle integration, you add the drz files.

Normally you don't drizzle.

#5 dixiefla

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Posted 25 February 2023 - 08:20 AM

I reran WBPP again, with additional subs I just got. I ran ALL the subs, old and new, thru star alignment first, and used those r.xisf files. Star alignment yielded 2 groups for each color channel, apparently because the 2 cameras gave subs different file names. One name started with "LIght" and said B, for example, for blue. The other name used started with the date taken and then spelled out the word "Blue".  SA didn't combine the files with the 2 different file names, so WBPP again made 2 master lights for each color channel, rather than one.

 

Obviously I want to stack all the light subs from each color channel together. This result stacks those with the different file names separately.

 

How do I get it to stack ALL of the files having a common color channel, i.e. all of the blues regardless of the different file names?



#6 dac4215

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Posted 25 February 2023 - 01:03 PM

I am only a beginner with pixinsight so all I can offer is a couple of things that I would try if I were trying to do this. I am not sure if either will work, they are only suggestions.

1) Instead of using "+lights", try using "add custom" to add all of your light frames, probably one channel at a time.

2) Use "keyword grouping" in wbpp. Use a keyword such as "CHANNEL" and add "CHANNEL_B" to file name of each of your blue frames, "CHANNEL_R" to red and so on. 

Not sure if these will do what you want, but I hope they help.




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