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UPDATE FROM MABULA

I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.

 

Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.

 

APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46.  Before I release it, I will make sure that everything is working properly and then I will release it.

Get rid of column defects

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 momo
(@mo-mo)
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Joined: 5 years ago
Posts: 127
Topic starter  

Hello

I started using APP a few days ago. There are many things I don't understand, but the ones I'm currently having trouble with are:

There are column defects in the ccd image. Straight scratches.
Is there a way to get rid of this?

 

 

 
 

 

 


This topic was modified 5 years ago 2 times by momo

   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Hi Kunihiko,

I'm not seeing the image you posted properly. Did you use the "attach files" link when posting? Could you try again?



   
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 momo
(@mo-mo)
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Red 090s


   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Ah, that looks like a column defect indeed. Your dark frames should show the same, do you have those?



   
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 momo
(@mo-mo)
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Topic starter  

Yes

One dark and Master Dark  -Attach Files

I useed dark frames, flat frames, bias frames.

Then there are column defects.

Dark 90s
MsterDark 90s

This post was modified 5 years ago by momo

   
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 momo
(@mo-mo)
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Hello

I tried some things.
I tried Hot Column Kappa with 7.0 ( 2) Calibrate-Cosmetic Correction).

 

NGC Blue Column kappa(hot)

As a result, Column Defects appears to disappear.

Is this the correct way?
If so, how can I decide the appropriate value of Hot Column Kappa?

And what should I use Cold Column Kappa?



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Excellent! Yes, that is a great way if regular darks don't fix it. You can load in a single light and test a few kappa values, then switch to "l-calibrated" view by selecting this on top of the preview-window to see if the line is gone. If not, you change the kappa value slightly and check again. That way you can see the correction directly before doing the entire integration process.

Cold kappa is for cold pixels and these are almost not present in todays sensors. Cold pixels will look like dark spots.



   
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 momo
(@mo-mo)
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Hello

Thank you very much.
I understood Hot Column KAPPA.
And I was satisfied with the effects of that.

I hope you have a good weather.



   
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