11 replies to this topic

[yzhzhang]

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

 

[Stellar1]

A wonderful image! 

[Dan Crowson]

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

Dan

[yzhzhang]

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

Dan

Thanks Dan you are right! Signature updated.

[andysea]

Beautiful image! Those Takahashi stars look great!

[mmalik]

Good capture; please briefly list LRGB processing steps. Regards

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

[yzhzhang]

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

[Jim Thommes]

Beautiful image Yizhou.

[R Botero]

Top image!  Top skies 

 

Roberto

[Paul Garais]

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

[yzhzhang]

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

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

[elmiko]

Outstanding image!!