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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.

Light Pollution Correction Tool question

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(@cheastside)
Red Giant
Joined: 6 years ago
Posts: 32
Topic starter  

in the video tutorial, Mosaic Tutorial – Milky Way to Rho Ophiuchi part 1-7 by Mabula,

he works the image from left to right to address light pollution.  is this the approach to be taken for all images, mosaics to single images?  or for single image, ie not mosaics, can we apply the initial five boxes over the entire image to start with?  

 

also, do we only place boxes over areas we think have LP?  Or do we need boxes placed all over the image regardless of whether there is LP in an area or not?

in my image capture attached here, i've done a maximum stretch and increased saturation to 30 and saturation threshold to 0.  i have a LP gradient i believe from right to left.  would i need to place boxes at all in the black areas at far left of image? 

Screen Shot 2021 12 06 at 10.14.07 AM

 

thanks!


This topic was modified 5 years ago by cory freeman

   
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(@turtlecat1000)
Red Giant
Joined: 5 years ago
Posts: 63
 

The way I've interpreted it, and I could be wrong, is to start with a few boxes in areas that don't have nebulosity or the object of your choice. Run calculate and slowly work your way inwards towards the subject by adding boxes in areas of background. For example, if my object is in the center I'll add some boxes in the corners and sides and slowly add some inwards till I get close to the subject. Once everything looks pretty even I'll save and move on.



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

Yes, you stretch to the maximum setting (of the presets on the right) and pick 5 boxes around the image on what you think is background. You click to check the result and then you either clear the boxes to set them properly or continue towards problem areas, not directly on top of them, no big boxes either, just creeping towards the areas that show residual gradient.



   
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(@cheastside)
Red Giant
Joined: 6 years ago
Posts: 32
Topic starter  

@vincent-mod and @turtleCat

thanks for responding.  so i could place my initial five boxes as shown in the attached image and then work from that right?

Screen Shot 2021 12 06 at 10.14.07 AM

 



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

Yes, press calculate to see what it does and work from there. This area is challenging because of all the bright stars and dust, so good luck. 😉



   
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(@cheastside)
Red Giant
Joined: 6 years ago
Posts: 32
Topic starter  
Posted by: @vincent-mod

Yes, press calculate to see what it does and work from there. This area is challenging because of all the bright stars and dust, so good luck. 😉

yes, it is!  i have 95 boxes placed so far! :O

Screen Shot 2021 12 07 at 6.39.02 AM

 


This post was modified 5 years ago by cory freeman

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

95! That shouldn't be necessary. haha Having trouble with uneven gradients?



   
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(@cheastside)
Red Giant
Joined: 6 years ago
Posts: 32
Topic starter  

@vincent-mod

following mabulas maticulous example from the video haha.  a lot of light pollution in the right side.  i think i've got it now.  i'll try just a few boxes to compare the two.  



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

Ah yes, the pollution model is pretty rigid (so not very flexible). This usually helps users as regular gradients are nice and smooth. But here I think you have some uneven patches and that gets tricky indeed. If you are ok with the result, turn down the stretch and it should look pretty nice I think.



   
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(@cheastside)
Red Giant
Joined: 6 years ago
Posts: 32
Topic starter  

@vincent-mod

ya, neighbors left their backyard lights on, each side of me, on the first and third nights. not to mention the flood light across the street.  looking at a normal stretch and saturation it does look pretty good.  thanks for the advice!



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

Outsj, I feel the pain coming from the Netherlands. 😉 Cool, happy to help!



   
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