Strange colors

That is a very strange one, how does a regular sub look like? No issues with the calibration files?

I have tried with other programs and the result has the correct colors. The stars are wrong because I had to put the shims for the backfocus, but the colors are correct.

I have experienced the same problem. Here is an integration for M42 using duo narrow band filters. Here is also the image after loading it into the "remove light pollution" tool and the image after applying the " remove light pollution". Note that these images display fine in pixinsight. So definitely

something is wrong with the way APP is rendering/displaying these images 

Exactly. Same colors. I've seen something change sometimes with the pedestal option.

Weird, would you mind to upload your data so we can have a look? As it seems the same issue, the data from Paolo should be enough;

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

Create a directory named "paolo27-weirdColoredM42” and upload in there. Thank you!

@vincent-mod 

I have created a folder names afnaguib-weirdColoredM42 and I uploaded in it the fits file that exhibits these issues with APP

Thanks, I'll also have a look at your data. Please allow for up to a day.

Could you also upload a few regular lights (like 10) and your master calibration frames?

@vincent-mod 

I uploaded 30 lights (10 for 15sec subs, 10 for 30sec subs, and 10 for 300sec subs) and the master calibration frames

Thanks, will have a better look today.

At first glance I didn't see real issues with your data, after integrating using the different master-darks and masterflat, this is what I got (using APP 1.083.2):

Normalization on or off doesn't produce weird colors either. I didn't use LNC or MBB.

I didn't select to use any narrow-band filter for this. What kind of filter did you use? I can check further what happens when I extract the channels. The result is at least the same when using the Ha-OIII color algorithm from tab 0.

I use a 533 Mc pro. And I had the same problems as him. It made the wrong colors only on Orion. On the nebula Cono and Rosetta no.

..  I don't know why the image is not shown. However I have always used Airy disc.

What exactly is your workflow, you simply load in the fits files straight into APP (not via another program) and go to tab 6 and press integrate?

I load the light, dark flat bias .. then as always I go to card 6 and change them something. I was unable to log in with my credentials to post the files online. I use an l-extreme

HOO algorithm

This is Rosette

Posted by: @paolo27

I was unable to log in with my credentials to post the files online.

Check Vincent's comment again please. You cannot use your APP credentials but need to use the word upload for both username and password.

Posted by: @paolo27

 

HOO algorithm

So that means you process first by extracting the narrowband data right? Not straight away loading in the data, integrating RGB and then the combineRGB tool? Because that's preferred, first extracting the narrowband data, (Halpha and OIII separately) making integrated Ha and OIII files, normalize those against each other and save the normalized frames and only then combining them in the combineRGB tool.

But the thing I don't understand is that I use a method that a lot of people follow. It only gave me problems in orion.

I think it's coincidence that it worked in the other objects, there the histogram also doesn't look correct to me. What exactly is the method you follow then, how do you use the combineRGB tool? As said, it's best, with narrowband filters like the one you use, to first extract the narrowband data. I'm trying that now with the data from afnaguib to show.

Sorry but it seems to me that we do not understand each other. My English has remained at school level. I read but to write correctly I use the translator. The method I use I wrote above. The HOO test was to show that I get the same results as both Airy disc and HOO in tab 0. Bye.

That is fine Paolo, I didn't know that. I think I may know the answer though, you're working in the Light Pollution correction tool probably and have the preview window set to "neutralize-BG", this can go wrong when you do both and can show this result. Mabula will force APP to switch off the neutralize-BG while in this tool. So, switch off neutralize-BG there and it should work.

It solves nothing

Ok, that is strange. Could you upload your data as well like I proposed? Use the word: upload as the username and password.

@vincent-mod  My work flow is this

1- Select Ha and OIII color algorithm on tab 0

2- Set hot pixel kappa to 2.5 on tabe 2

3- Use default settings for tabs 3, 4, 5

4- For tab 6, I use adaptive rejection with local normalization rejection "ON". I also set local normalization correction with LNC degree set to "2nd degree LNC" and LNC iterations set to "3"

So the only major difference I see here is whether LNC is used or not. 

Note: I am using the Optolong L-eXtreme duo narrow band filter, ASI2600MC

@vincent-mod In your reply to Paolo you mention that, if I use the Ha and OIII extraction integration option, I should normalize these integration against each other and then use these normalized integration in the RGB combine tool. What if I will use them with another RGB integration (for example a broadband integration of M42). Should I normalized the BB integration against the Ha and OIII integrations as well before using RGB combine tool as well?

@vincent-mod wrt to forcing the  neutralize-BG to off when in the remove the light pollution tool, I want to point out that I tried that and still the same result, e.g. strange colors

Posted by: @afnaguib

@vincent-mod In your reply to Paolo you mention that, if I use the Ha and OIII extraction integration option, I should normalize these integration against each other and then use these normalized integration in the RGB combine tool. What if I will use them with another RGB integration (for example a broadband integration of M42). Should I normalized the BB integration against the Ha and OIII integrations as well before using RGB combine tool as well?

 

If you want to process narrownband with RGB, the best approach is to first split the channels of the RGB data to R, G and B mono data. These can then be loaded in again, together with any other mono data (like Ha and OIII) and integrated together. You'll then get integrated Ha, OIII, R, G and B results. These should then be ready for the RGBCombine tool. If you don't process that mono data together, but on their own first, then you load the integrated data as lights and go to the normalize tab to normalize them and then save them. Those can then also be used in the RGBCombine tool.

Posted by: @afnaguib

@vincent-mod wrt to forcing the  neutralize-BG to off when in the remove the light pollution tool, I want to point out that I tried that and still the same result, e.g. strange colors

 

That is strange as I'm using your data for the above results. You are using 1.083.2 right? What happens if you do what I did, so just loading in the data, not changing anything, going to tab 6 and clicking on integrate?