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Widefield Mosaic Normalization Issue


(@chrispeace)
Main Sequence Star Customer
Joined: 4 years ago
Posts: 43
Topic starter  

I have Ha shot with an Atik 460EX through a Askar FMA180mm F4.5 scope. I then have RGB shot with a Canon 650D and 50mm lens. I'm trying to overlay the Ha to enhance certain parted of the 50mm wide field image such as the Horse Head and Orion Nebula. All goes well until I get this failure message at the Normalization stage:

image

I have been following the notes in the Mosaic tutorial and my AAP version is 1.082. I have tried all of the available settings within Normalization but get the same failure warning. Pixel scales are: 5.2 for the Atik rig and 11.6 for the Canon rig.

This is a shot of the workflow log:

image

Any help would be appreciated though I'm guessing having different cameras may be a problem.

Kind Regards Chris

This topic was modified 2 years ago by ChrisPeace

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(@vincent-mod)
Universe Admin
Joined: 5 years ago
Posts: 5127
 

This is likely because you're trying to normalize RGB (which is multi-channel data) with mono (1 channel) data. To get this to work you first need to split the RGB channels into R, G and B (split channel option all the way down on tab 2). Then you'll have all mono data and you can register, normalize all of those together. When done, you'll have 4 masters which you can load into the RGB Combine tool.


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(@chrispeace)
Main Sequence Star Customer
Joined: 4 years ago
Posts: 43
Topic starter  

@vincent-mod

appreciate the swift reply. Thank you Vincent. Wishing the whole team much success and health in 2021. 


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(@vincent-mod)
Universe Admin
Joined: 5 years ago
Posts: 5127
 

Thanks a lot Chris, I wish you the same! Hope this will work out for you.


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(@explorer7377)
White Dwarf Customer
Joined: 4 years ago
Posts: 15
 

Good day all. I am having a lot of trouble completing a 3x3 mosaic. I followed Vincent's recommendations of creating 9 individual panels as I normally would. Went back and set for mosaic, When it gets to REGISTER, it keeps giving errors. Specifically an 'Uncountable' error. See attached.  Settings are as follows.

Scale start 5

Scale stop 15 (I've played with both of these from 2 to 10 respectively)

Flip descriptors, dynamic distortion clicked and same camera unchecked.registration as Mosaic, calibrated projective. normalize is Advanced. 2nd degree with 3 iterations. MBB @ 10% (as was acquired as such). I've tried both Lanczos-3 and Cubic B-spline.

At least half the frames come back unregistered or I get the Uncountable error'.

Camera is ASI294MC with L-Extreme filter. Tab 0 is set for Ha-OIII and Force Bayer checked. Each panel is only 7 or 6 300 sec subs.(I cannot attach as they are larger that 30MB) 

Screenshot 12 27 2021 11.16.03

 Suggestions? It is important to note that I have done 2x2 mosaics with no issues in the past, so not sure why this is being held up.

 

 

Thanks!

 

CJ


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(@vincent-mod)
Universe Admin
Joined: 5 years ago
Posts: 5127
 

That's an interesting error, let me ask Mabula about it.. do the panels overlap well btw?


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(@vincent-mod)
Universe Admin
Joined: 5 years ago
Posts: 5127
 

So, apart from the overlap (if it's 10% then we advise to increase that, it can be too low for a multiple panel mosaic, say 15-20% is better as APP does need enough stars to register). You can also try to increase the amount of stars, set it at 2000 for instance.


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(@explorer7377)
White Dwarf Customer
Joined: 4 years ago
Posts: 15
 

@vincent-mod I’ve had overlap set to 20% at one point and even star analysis to 10,000. Same error. 

cj


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(@vincent-mod)
Universe Admin
Joined: 5 years ago
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No I mean the actual overlap. 🙂 So the overlap you programmed for the capture software to use, that should be higher than 10%. We can have a look at the panels you have to see the issue.


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(@chrispeace)
Main Sequence Star Customer
Joined: 4 years ago
Posts: 43
Topic starter  
Posted by: @explorer7377

Good day all. I am having a lot of trouble completing a 3x3 mosaic. I followed Vincent's recommendations of creating 9 individual panels as I normally would. Went back and set for mosaic, When it gets to REGISTER, it keeps giving errors. Specifically an 'Uncountable' error. See attached.  Settings are as follows.

Scale start 5

Scale stop 15 (I've played with both of these from 2 to 10 respectively)

Flip descriptors, dynamic distortion clicked and same camera unchecked.registration as Mosaic, calibrated projective. normalize is Advanced. 2nd degree with 3 iterations. MBB @ 10% (as was acquired as such). I've tried both Lanczos-3 and Cubic B-spline.

At least half the frames come back unregistered or I get the Uncountable error'.

Camera is ASI294MC with L-Extreme filter. Tab 0 is set for Ha-OIII and Force Bayer checked. Each panel is only 7 or 6 300 sec subs.(I cannot attach as they are larger that 30MB) 

Screenshot 12 27 2021 11.16.03

 Suggestions? It is important to note that I have done 2x2 mosaics with no issues in the past, so not sure why this is being held up.

 

 

Thanks!

 

CJ

CJ

Was the 2x2 mosaic that worked taken with the 294MC and L Extreme filter?

Chris Peace. 


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(@explorer7377)
White Dwarf Customer
Joined: 4 years ago
Posts: 15
 

@chrispeace yeppers.


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(@explorer7377)
White Dwarf Customer
Joined: 4 years ago
Posts: 15
 

@vincent-mod gotcha. Yeah, I programmed for 10%. The files are too big to upload. Is there a dropbox or can i send you a google drive invite?


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(@vincent-mod)
Universe Admin
Joined: 5 years ago
Posts: 5127
 

Mm, unfortunately I'm on very slow Internet at the moment. Could you upload it to our server?

Go to https://upload.astropixelprocessor.com and for the username and password, use: upload

Create a directory named “explorer7377-mosaicRegIssue” and upload in there. Thank you!


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(@explorer7377)
White Dwarf Customer
Joined: 4 years ago
Posts: 15
 

@vincent-mod Done! Thank you!

 

CJ


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(@vincent-mod)
Universe Admin
Joined: 5 years ago
Posts: 5127
 

Sorry took a bit. Yes, from what I can see, the overlap is not big enough for the top 3 and bottom 3. Unfortunately you'd have to take bigger overlapping frames, but you can add them to this dataset and then they can still be used.


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