Author Topic: NGC7000 - The wall  (Read 1407 times)

Offline Andres.Pozo

  • PTeam Member
  • PixInsight Padawan
  • ****
  • Posts: 918
    • View Profile
NGC7000 - The wall
« on: 2015 June 12 12:23:35 »
Hi,

I have been processing old data from the Wall area in NGC7000 but I am not happy with the result. It is a mix of H-alpha and O-III data using a HOO combination.
After calibration, registration and integration I applied the following steps:
  • ChannelCombination (HOO)
  • BackgroundNeutralization
  • ColorCalibration
  • SCNR (green) for killing the cyan haloes around the brightest stars
  • Deconvolution
  • MaskedStretch
  • CurvesTransform (increasing the brightness and contrast)
  • TGVDenoise
  • HDRMultiScaleTransform

The result is this:

Click on the image for opening it in Astrobin

If anyone wants to play with the image, the FITS are in this link:
https://dl.dropboxusercontent.com/u/71653208/FotosForum/NGC7000-The%20Wall.zip

Offline Alejandro Tombolini

  • PTeam Member
  • PixInsight Jedi
  • *****
  • Posts: 1267
    • View Profile
    • Próxima Sur
Re: NGC7000 - The wall
« Reply #1 on: 2015 June 21 19:27:25 »
Hi Andrés, this is an excellent image! Congrats!
Nice and natural contrast in all the image, the only thing I think would look better is the dark nebula that seems too dark and with clipped regions.
I tried to reproduce step by step your processing while protecting that area and of course I couldn't.  My CC gave a very different result, so I adjusted HT at the end to be near to your colors.
Previous to TGV Denoise I made a RangeMask to protect dark areas and leave there the noise like it was.
temporary link
Saludos,
Alejandro.

Offline Andres.Pozo

  • PTeam Member
  • PixInsight Padawan
  • ****
  • Posts: 918
    • View Profile
Re: NGC7000 - The wall
« Reply #2 on: 2015 June 22 03:09:02 »
Gracias Alejandro!

I like your version of the image. The central "wall" of hydrogen  is brighter and with more contrast than in my image. I have to redo the process and try to increase the brightness without enlarging the stars.

Andrés.