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M78 LRGB

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#1 yzhzhang

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Posted 22 November 2020 - 12:17 PM

Hi all,

 

I have been around in BII for a while and I think this is my first post in Experienced Imaging forum. I moved into a remote observatory recently and I think I should move myself to (slight) experienced imager category to justify the cost :)

 

Here is a process of M78 LRGB with our dual-scope setup, with TOA130 providing Lum details and FSQ106 providing color info from a wider FoV. I tried to "force" a H-alpha-blending-in effect while waiting to capture some H-a data in the next window. M78 is a beautiful blue nebula surrounded by red clouds/dusts, and I really wanted to give it a try.

 

C&C welcomed. Thanks for viewing.

 

Yizhou

 

get.jpg?insecure


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#2 Stellar1

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Posted 22 November 2020 - 12:19 PM

A wonderful image! 



#3 Dan Crowson

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Posted 22 November 2020 - 01:24 PM

Yizhou,
 
excellent image. It might be time to update your signature equipment.
 
Thanks for posting,

Dan



#4 yzhzhang

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Posted 22 November 2020 - 02:42 PM

Yizhou,
 
excellent image. It might be time to update your signature equipment.
 
Thanks for posting,

Dan

Thanks Dan you are right! Signature updated.



#5 andysea

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Posted 22 November 2020 - 02:56 PM

Beautiful image! Those Takahashi stars look great!



#6 mmalik

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Posted 22 November 2020 - 03:12 PM

Good capture; please briefly list LRGB processing steps. Regards


Edited by mmalik, 22 November 2020 - 03:12 PM.


#7 yzhzhang

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Posted 22 November 2020 - 05:35 PM

Thanks all for the kind words!

 

Good capture; please briefly list LRGB processing steps. Regards

Hi mmalik,

 

General approach in PI is as follows (could be doing it wrong of course :)):

 

Linear:

RGB combine --> PCC --> SCNR a bit on the green

L & RGB stretched to non-linear using masked stretch with slight star core repair

Non-linear:

L: slightly denoised using Topaz DeNoise

L: some feature extraction (HDR, MMT, DarkStructureEnhance script)

LRGB combination

Boost of red in belt & blue in core using color mask

Final boost of saturation and contrast in Curves

Slight star-shrinking with MT with contour mask

End


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#8 Jim Thommes

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Posted 22 November 2020 - 09:52 PM

Beautiful image Yizhou.


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#9 R Botero

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Posted 23 November 2020 - 04:10 AM

Top image!  Top skies waytogo.gif

 

Roberto


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#10 Paul Garais

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Posted 23 November 2020 - 05:07 AM

Awesome image. You definitly succeeded with bringing out the red nebulosity. The stars look great.

The only point I would change is the too much toned down core, which looks dull/grey instead of bricht/glowing. But that is personal preference from someone with very limited experience ;)

#11 yzhzhang

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Posted 23 November 2020 - 01:48 PM

Awesome image. You definitly succeeded with bringing out the red nebulosity. The stars look great.

The only point I would change is the too much toned down core, which looks dull/grey instead of bricht/glowing. But that is personal preference from someone with very limited experience wink.gif

Thanks Paul! Fair point. I HDRed the core with the intend to pull more blue out of the core, but perhaps overdone it so it doesn't look as natural. Thanks for your input!

 

Yizhou



#12 elmiko

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Posted 23 November 2020 - 05:20 PM

Outstanding image!!




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