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APP 1.075 has been released !

2019 September: Astro Pixel Processor and iTelescope.net celebrate a new Partnership!

Workflows for STC Astro DUO Filter  

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(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 935
August 23, 2019 12:24  

You don't have to load the subs again, just go back to the 0-tab and switch to the other algorithm.


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(@arjan-kievits)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 6
August 25, 2019 14:44  

Well, I'm at a complete loss here. Any help is welcomed right now. Here's what I have/do, following the steps Mabula mentioned:

1: shot my first STC Duo Narrowband HA/OIII images with a ASI294mc-Pro. 10 images of M27
2: [tab 1] load lights
3: [tab 0] select Ha-OIII extract Ha (leave all default, i.e. pattern = supported)
4: [tab 2] calibrate using defaults
5: [tab 3] analyse stars
6: [tab 4] register using defaults
7: [tab 5] normalise using defaults
8: [tab 6] integrate. Everything default except outlier rejection --> LN Sigma clip (I used dithering when taking the images. Learned that this setting works best for that)
9: back to [tab 0] select Ha-OIII extract OIII
10: straight to [tab 5] normalise using defaults
11: [tab 6] integrate, same settings as at step 8

Now I have 2 files in my working directory. One for Ha and one for OIII. So far, so good I guess. Both images look exactly the same though! I think something already went wrong here but ok...

12: Go to [tab 9] and select combine RGB
13: load both files, select the first as Ha and the second as OIII filter
14: Slide the red slider for Ha to 100% and green and blue for OIII to 100%

The result: A black and white image, no color. Nothing like what I see here on the topic. 
I also followed the steps in the pdf shared here, same result. 

What am I doing wrong here? 


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(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 935
August 25, 2019 15:04  

Hi Arjan,

Problems will always arise when doing new things, no worries we will get to the bottom of it. 🙂 For the quickest answer, you can upload like 10 lights, maybe calibration masters as well, to our APP server. Use login and password: appuser

Please create a folder with your name on it first. I'll then have a look at the process and see if I can create a proper result and tell you about it.


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(@arjan-kievits)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 6
August 25, 2019 15:24  

@vincent-mod

I will. thanks. Surely I'm doing something wrong, but that's the best way to learn, right 😉
It's going to be 10 lights only, no darks etc. 'cause this was a first test with the duo narrowband filter. I've got 10 color-lights, too but those can wait. 


(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 935
August 25, 2019 15:34  

You can add those too, no problem, I can use them to immediately go for the full picture.


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(@arjan-kievits)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 6
August 25, 2019 15:50  

@vincent-mod

okidoki. Done. Don't look at quality and stuff. This was 'first light' for the ASI294MC-pro with both filters. So the files starting with 'NB...' are with the STC duo narrowband and the files starting with 'L...' are the lights with a Baader IR/UV cut filter. 

Tnx again! Hope the workflow will generate some results and I love to understand what's happening.


(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 935
August 25, 2019 19:49  

No worries, I always only look at the problem, I'm not here to judge the actual quality. 😉 I'll download them and have an answer by tomorrow.


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(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 935
August 25, 2019 22:24  

So the problem is because the debayering is not taking place. APP doesn't recognize the camera as having a Bayer filter on the sensor. So to solve this you select "Force CFA" in tab-0 and then go through the steps again. Then you will get the following result (I didn't try to make it nicer or anything, but it solved the issue):

Screenshot 2019 08 25 at 21.24.06

I'll not say anything about them not being in focus. 😉 But you've got some nice signal here!

 


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(@arjan-kievits)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 6
August 25, 2019 23:28  

@vincent-mod

Holy moly! Thanks, I'll give it a go myself. I played with the [tab 0] and selected RGGB, so at least I was on the right track. sort of 🙂
At least the Ha and OIII data is there, so that crazy expensive filter actually does something 😉

As for focus, I found out I can do a 4x4 binning in APT, exposure to 0.1 and use my bahtinov mask. It's just so different from DSLR but I'll get there...

Another lesson learned. I'll let you know if I can get the same result.


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(@arjan-kievits)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 6
August 27, 2019 06:57  

got it! Same workflow as described, but changing to Force CFA did the trick.
Now to figure out how to combine the Ha/OIII with the color-lights... Luckily I'm going on a holiday in 3 days, plenty of time to play around with it!


(@adrienl)
Molecular Cloud Customer
Joined: 1 year ago
Posts: 5
August 27, 2019 08:57  

seems I had the same issue in fact / Force CFA not ticked... Thanks a lot for the support.

Adrien


(@phfenain)
White Dwarf Customer
Joined: 6 months ago
Posts: 12
September 17, 2019 10:20  

Hi All,

I have an Optolong L-Enhance which is also a dual band for OSC similar to the STC.

I have followed the workflow and I have extracted the Ha and OIII. In "Combine RGB", I have tried allocating Haextract to Ha and OIIIextract to OIII, also tried allocating Ha to Red and OIII to green and blue. I am confused as my trials bring at best a pale result, at worst all green, all red or similar terrible results.

Could someone please explain how you play with the sliders? What is the workflow to produce a good image when combining those narrowband extracts ? 

Thanks!

Philippe


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(@arjan-kievits)
Brown Dwarf Customer
Joined: 9 months ago
Posts: 6
September 17, 2019 11:19  

@phfenain

Hi Philippe,

I am by no means an expert on this, but I did find that this next workflow works for me:
You seem to be able to extract Ha and OIII and combine them in RGB-combine. So far, so good. What I do next is select the Ha-image for H-Alpha and the OIII for oxygen. Then, slide the R(ed) to 100% for Ha and G(reen) and (B)lue both to 100% for OIII. Click Calculate. I started playing with the sliders afterwards, but if you keep a green haze, try PixInsight to remove that (I am currently on a trial-license and found that it works great, it's just a bit difficult).

Hope this helps a bit. See the screenshot as an example, it shows the sliders for both files. Note that if I leave Green at 0%, the image turns all pinkish or whatever. No details anymore. So perhaps you can try this.

Schermafbeelding 2019 09 17 om 11.21.36

 

Arjan

This post was modified 2 months ago by arjan.kievits

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(@phfenain)
White Dwarf Customer
Joined: 6 months ago
Posts: 12
September 17, 2019 21:59  

@arjan-kievits

Thanks! That helped me a lot. Still need to investigate and understand the effect of the sliders.


(@chris_16)
Brown Dwarf Customer
Joined: 1 year ago
Posts: 9
October 1, 2019 13:27  
Posted by: @mabula-admin

Hi @daniel-tackley & @dav78,

Method 2) is preferred because you will be able to get much more and different colors in the bi-color composite.

It is quite stratightforward to accomplish what you want to do:

1) you will need the mono (for lum if you need/want is as well) and the extract algorithms

2) start with the Ha-OIII extract Ha (usually more signal so easier registration), process the data up until the Ha integration.

3) don't completely restart now

4) set the other debayer algortihm, for instance the Ha-OIII extract OIII,

5) now go to 5) normalize to normalize the OIII data. (no need to perform registration again, and this ensures the Ha and OIII integrations will be registered to each other)

6) Integrate the OIII data ,

The resulting integrations will be registered to each other thus are ready to load into the RGB Combine tool 😉

Let me know if this is clear and if you can follow this flow 😉

Kind regards,

Mabula

 

 

Hi,

I have processed NGC7000/IC5070 with data aquired with an Optolong L-enhance filter (similar to STC DUO) and followed the method Mabula describes earlier in this thread. Loaded Ha to the Ha channel (x1,000 bg 0,8 - 100%R 50%G 0%B) in Combine RGB, OIII to the OIII channel (x5,000 - 0%R 50%G 100%B). I am totally blown away from the result! The only thing which could be improved is the transition between the blue areas and the orange/red areas, especially in "the wall" region. If you zoom to 100% the color channels have a prominent dotted structure. Maybe there is some solution to reduce this effect further?

Cheers,

Chris

 

0070b NGC7000 Hubble 70x4min Lacerta ASI1600 128D 64F 64FD BPM 20190921


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(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 935
October 1, 2019 15:07  

It's something that could use a bit of optimization maybe (from APP). If you could share the data, Mabula can use it to improve upon it. Did you do HSL selective color on it?


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(@chris_16)
Brown Dwarf Customer
Joined: 1 year ago
Posts: 9
October 1, 2019 16:40  

@vincent-mod

Hi Vincent,

thanks! I did not use HSL selective so far - did all my postprocessing in Photoshop. I will try to find a way to provide the data...

Chris

 


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(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 935
October 1, 2019 16:49  

You can upload it to our server if you want, login/password is appuser
Just create a folder with your name and put it in there. Would be awesome. 🙂

 


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(@headworx)
White Dwarf Customer
Joined: 1 month ago
Posts: 12
October 28, 2019 13:52  
Posted by: @mabula-admin

1) you will need the mono (for lum if you need/want is as well) and the extract algorithms

2) start with the Ha-OIII extract Ha (usually more signal so easier registration), process the data up until the Ha integration.

3) don't completely restart now

4) set the other debayer algortihm, for instance the Ha-OIII extract OIII,

5) now go to 5) normalize to normalize the OIII data. (no need to perform registration again, and this ensures the Ha and OIII integrations will be registered to each other)

6) Integrate the OIII data ,

The resulting integrations will be registered to each other thus are ready to load into the RGB Combine tool 😉

This has delivered very good results, and is in fact simple to learn.

Now the problem I have is how to add to this mix an unfiltered (full RGB) set from a 2nd camera (different geometry / pixels). I have succeeded doing that using multi-session processing (session 1: Ha-Oiii, session 2: RGB), but have failed to do that using the workflow discussed here ( session 1 / channel 1: extract-Ha, session 1 / channel 2: extract-Oiii, session 2 / channel 1: RGB). In the latter case no matter how I try going through the all process (at the combine RGB I keep getting the " The images aren't compatible! please make sure that the data has same dimensions and bit depth " error).

Any hints on how to do multi-session together with separate Ha and Oiii extracts from one of the sessions?

--Simon


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(@deeko76)
Brown Dwarf Customer
Joined: 1 year ago
Posts: 6
October 28, 2019 15:24  

@chris_16

Would love to know how you produced the hubble palette in Photoshop with the ha and oiii files from APP using the Optolong L-enhance filter - I have the same one with a ZWO 294MC pro.


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