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Soul nebulae in HOO

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#1 F.Meiresonne

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Posted 14 October 2021 - 03:35 PM

The Soul in HOO

 

 

https://www.cloudyni...3911_357398.png

 

A new approach.  Tried a Ha luminance stack with a mono DSLR and combined it with a colored OSC stack with the L-enhance.

 

I kinda like it

 

Processed in Startools and GIMP afterwards for color tweaking ., about 7 hours of integration in borttle 5 skies.

 

Had trouble to take the mono stack, a Ha filter does not show much on a DSLR screen, so test shots for focussing were needed.

 

Special thanks to the Elf and Dubbelderp for advice and aligning the stacks, which gave me a problem , in this case

 

Took a bit too much stars out, and background a little too dark. Definately an issue in the reduces jpg file

 

But i think this approach might work on certain emission nebulae.

 

Thoughts and criticisme welcome

Attached Thumbnails

  • Result2 (Large).jpg

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#2 F.Meiresonne

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Posted 15 October 2021 - 04:31 PM

Hmm..no comments at all? That bad huhgrin.gif


Edited by F.Meiresonne, 16 October 2021 - 02:19 AM.


#3 vidrazor

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Posted 15 October 2021 - 05:05 PM

Hmm..no comments at all? Thay bad huhgrin.gif

LOL, looks great man. You have a lot of time on it, looks like you have more data you can extract. I did a little with your file posted here, but I bet you can get some more out of your hi-bit data.

 

Great job!
 

Attached Thumbnails

  • soul.jpg

Edited by vidrazor, 15 October 2021 - 05:06 PM.

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#4 F.Meiresonne

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Posted 15 October 2021 - 05:21 PM

Thanks Vidrazorgrin.gif grin.gif

 

Tomorrow i will post a link to the stacks.

 

If one should be interested..


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#5 galacticinsomnia

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Posted 15 October 2021 - 06:17 PM

Thanks Vidrazorgrin.gif grin.gif

 

Tomorrow i will post a link to the stacks.

 

If one should be interested..

I would be interested in that.

I like what you have done. 

Clear Skies !!



#6 F.Meiresonne

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Posted 16 October 2021 - 02:16 AM

https://www.dropbox....l-reg.fits?dl=0

 

https://www.dropbox....l-reg.fits?dl=0

 

These are the stacks. A Ha stack monochrome and a colored OSC stack but with L-enhance filter...

 

They should be aligned, Todd (Dubbelderp) was so kind to do this for me, cause Siril for some reason failed on that...


Edited by F.Meiresonne, 16 October 2021 - 02:17 AM.


#7 mackiedlm

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Posted 16 October 2021 - 10:35 AM

Hi Freddy,

 

Thats a nice image. Maybe the background a little dark for my taste and a bit noisy inside the nebula. But still a nice image

 

Hers my efforts with your data:

 

First as I think you prefer your Ha to be red

 

UKR_fpf.jpg

 

Second my own preference which is more towards the orange/gold colour.

 

HOO1_fpf.jpg

 

These were done in PI and finishing touches in PS so not much point in sharing the workflow to get here..

 

Size restrictions does them no good - if you want to see higher res let me know.


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#8 F.Meiresonne

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Posted 16 October 2021 - 11:43 AM

Hi David,

 

I like the both actually,  i have a 'fake' SHO also, same image just turned the red to the brown-orange gold.

 

Not really a SHO image cause the L-enhance does not let SII get in

 

Would love to see you high res images...

Also i see you are able to get a more refined image, can't do this

 

Thanks for your time in trying to process it!

 

Gosh i am so enjoying thislol.gif so glad this mono stuff together with the osc and l-enhance really works!

 

CS

Freddy

Attached Thumbnails

  • Result3 (Large).jpg

Edited by F.Meiresonne, 16 October 2021 - 11:45 AM.

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#9 mackiedlm

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Posted 16 October 2021 - 12:08 PM

Hi Freddy,

 

I prefer that image to your earlier version.

 

I've put my two into my staging (non-public) Astrobin area so you can have a look. just click on the image.

 

get.jpg?insecure

 

get.jpg?insecure


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#10 F.Meiresonne

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Posted 16 October 2021 - 12:11 PM

A-ma-zing...

 

You are a real pro...

 

Got still a long way to to it seems , cause youre images as said are more refined...

 

Thanks!



#11 mackiedlm

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Posted 16 October 2021 - 12:18 PM

BTW - just so you know - I blended the HA 50;50 with the red channel and used that as HA (Call It HaR) then i used the Ha on its own, after processing, as the Lum for the LRGB (or LHOO). I used Green channel as O and did some masked bosting to make the Oiii pop more.

 

 

In the Red one the blend was

 

R=Ha,

G= (Oiiix0.65+Hax0.35)

B= (Oiiix0.8 + Hax0.2)


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#12 F.Meiresonne

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Posted 16 October 2021 - 12:19 PM

Noise is a real issue with the mono and Ha filter...in the stack some darks are in, get this needs still more attention.

The Elf provided some info to take dark flats, helping the noise down.

Still have to investigate this



#13 F.Meiresonne

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Posted 16 October 2021 - 12:21 PM

Hi Freddy,

 

I prefer that image to your earlier version.

 

I've put my two into my staging (non-public) Astrobin area so you can have a look. just click on the image.

 

get.jpg?insecure

 

get.jpg?insecure

It is as you said, ask 3 people about color and you will get 5 answers...lol.gif


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#14 mackiedlm

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Posted 16 October 2021 - 12:23 PM

A-ma-zing...

 

You are a real pro...

 

Got still a long way to to it seems , cause youre images as said are more refined...

 

Thanks!

Thanks for that Freddy but far from what I'd consider even average.

 

I know you are a Startools Man to the core but, I think I've said it before to you, I just could not get on with startools and moved to Pixinsight about a year ago and I still have LOTS to learn.

 

Thanks for sharing your data - wall to wall clouds here yet again!


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#15 vidrazor

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Posted 16 October 2021 - 06:39 PM

I don't know how to work with Ha/Oi data, so I just went my own way with this, using mostly the RGB data. I did process the B&W file, and dropped it in as a luminosity layer, through a luminosity filter, to affect the luminosity from roughly 50/60-100% brightness. I was getting general noise, as well as sensor stripe noise, I tried to tame that down as best I could. Overall I'm noisier than you folks. I started in Siril, and, not knowing which scope you used, did a manual color correction on the RGB data, then stretches on both the RGB and luma data, and did additional stretching to both in Photoshop. I did a nebulosity extraction in Starnet and stretched, process, and overlaid that data. I made a star alpha and toned down the excess blue in the stars, and shrunk them down a bit, as I was getting some star bloat. In the end, I wound up with this. Hope you like it. smile.gif

Attached Thumbnails

  • Soul-rgb16.jpg

Edited by vidrazor, 16 October 2021 - 08:11 PM.

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#16 kevinbreen

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Posted 16 October 2021 - 08:33 PM

I've been away and just back. That's a fantastic image. Well done Freddie. I just received my L-enHance filter. Looking forward to trying it out.
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#17 F.Meiresonne

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Posted 17 October 2021 - 01:53 AM

I don't know how to work with Ha/Oi data, so I just went my own way with this, using mostly the RGB data. I did process the B&W file, and dropped it in as a luminosity layer, through a luminosity filter, to affect the luminosity from roughly 50/60-100% brightness. I was getting general noise, as well as sensor stripe noise, I tried to tame that down as best I could. Overall I'm noisier than you folks. I started in Siril, and, not knowing which scope you used, did a manual color correction on the RGB data, then stretches on both the RGB and luma data, and did additional stretching to both in Photoshop. I did a nebulosity extraction in Starnet and stretched, process, and overlaid that data. I made a star alpha and toned down the excess blue in the stars, and shrunk them down a bit, as I was getting some star bloat. In the end, I wound up with this. Hope you like it. smile.gif

Well done Vidrazor,

 

Only thing there seems to be a bit green that has come in. You stretched it further i think...Problem indeed with those mono DSLR ha approaches is indeed the noise...One thing for sure is you need darks, i used them. I don't use darks anymore for my 800D OSC but for the mono it is imperative. The Elf worked also out  a method recently with i believe dark flats, i still have to look into that  but he told me it helps againts the troublesome noise.

 

Oeps indeed forgot to give the specs : images both mono and OSC are taken with a 76 mm EDPH triplet  with FF/FR working at F 4/5



#18 F.Meiresonne

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Posted 17 October 2021 - 01:58 AM

I've been away and just back. That's a fantastic image. Well done Freddie. I just received my L-enHance filter. Looking forward to trying it out.

Thanks Kevin,

 

But i still need to learn much...seeing the processing from 'mackiedlm' makes this all to obvious...



#19 celeron787

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Posted 17 October 2021 - 02:51 AM

Thanks for sharing your data! Ordered an L-enhance and looking for some data to try out in Startools.

Just a quick process with only your L-enhance file, I'm still not sure how to go about processing different palette.

 

What's your bortle level? I'll be happy if I can get similar data in my bortle 8 zone.

 

NewComposite.jpg


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#20 F.Meiresonne

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Posted 17 October 2021 - 02:56 AM

Thanks for sharing your data! Ordered an L-enhance and looking for some data to try out in Startools.

Just a quick process with only your L-enhance file, I'm still not sure how to go about processing different palette.

 

What's your bortle level? I'll be happy if I can get similar data in my bortle 8 zone.

 

attachicon.gifNewComposite.jpg

Very nice try!

 

I am in Bortle 5, not very good, not very bad either.

 

Really interesting picture cause this shows the difference between the two, i mean osc with and without the Luminance.

 

I want to do it also, it is still on my to do list.grin.gif



#21 vidrazor

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Posted 17 October 2021 - 03:10 PM

Well done Vidrazor,

Only thing there seems to be a bit green that has come in. You stretched it further i think...Problem indeed with those mono DSLR ha approaches is indeed the noise...One thing for sure is you need darks, i used them. I don't use darks anymore for my 800D OSC but for the mono it is imperative. The Elf worked also out  a method recently with i believe dark flats, i still have to look into that  but he told me it helps againts the troublesome noise.

Oeps indeed forgot to give the specs : images both mono and OSC are taken with a 76 mm EDPH triplet  with FF/FR working at F 4/5

Yeah the "green" was registering as yellow when I would read it, I guess 'cause it's blending in with the blues it's creating cyan and green hues. Plus some of that I'm sure is chroma noise. I could try different ways to stretch, might minimize the noise levels.
 



#22 F.Meiresonne

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Posted 17 October 2021 - 04:07 PM

Seems that this kind of approach throws up quite some questions. 

From my side i am still troubled by the noise in mono image...and how to overcome this.

The Elf's ha shots are way cleaner.....


Edited by F.Meiresonne, 17 October 2021 - 04:07 PM.


#23 F.Meiresonne

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Posted 19 October 2021 - 12:33 PM

As it turned out :, CN member Mike in Rancho helpt me evaluating the stacks and so did Ivo.

 

Apperently there is severe pattern noise in the stacks ,cause maybe not agressive enough dithering...

 

So those stacks are not the easiest to process..sorry folks

 

Ok next time adjust that and see what it brings me



#24 mackiedlm

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Posted 19 October 2021 - 01:55 PM

Hi Freddy,

So what was your maximum dither distance for this data set. And by how much will you increase it.

Is the pattern noise in both the Ha and The colour or just in one.

Just trying to understand this in case I ever encounter it

#25 F.Meiresonne

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Posted Yesterday, 12:55 AM

See this thread

https://forum.starto...php?f=10&t=2370

 

If my calc was right i dithered about 18 pixels. I think i will go to about 30 next time.

The pattern noise as Ivo called it was it both stacks but more severe in the ha stack. As such i think this rules out a camera problem.

In the past i heard of  a CN member dithering about 30 pixels also with a DSLR..

Just hopes this affects not too much the settle time


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