NGC7000 - The wall

[Andres.Pozo]

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

[Alejandro Tombolini]

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.

[Andres.Pozo]

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.