Red halo removal?

[james423896]

I have been using pixinsight for a few weeks and love it! I have recently acquired a modified dslr and the sensitivity has amazed me. However, I seem to be getting red halos around a lot of stars (using a Canon 200mm f2.8).

The attached image (soul nebula) shows the problem and I am unsure what the correct process is for removing them? I got reasonable results by using a star mask and then lowering the red saturation using the colour saturation process, but I wonder if there is a better way?


Tia,

[Rob Friefeld]

It might be worth trying this:
1. Extract RGB components of the image.
2. Work on the R component with star mask and morphological transform to reduce the size of the stars.
3. Recombine RGB.

[Alejandro Tombolini]

Hi James, I used an halo mask created from a starmask (with Starmask tool) and a classic star mask (with ClassicStarMask script), subtracting them as showed in the attached icons.

Protecting with that mask used MLT and MT to reduce the halos.

Hope it help.

There are also other processing examples about halos here that may help.

Saludos, Alejandro.

[msmythers]

Alejandro

When I run the ClassicStarMask script I get an error:
ClassicStarMask.js, line 50: ReferenceError: HDRWaveletTransform is not defined

I'm guessing that is the old version of the HDRMultiscaleTransform tool and I could edit the script to use the HDRMultiscaleTransform, I hope?


Mike

Edit:
I changed all references from HDRWaveletTransform in the script to HDRMultiscaleTransform and the script ran fine. Interesting script in the way it builds a star mask!

[johndias]

Hi James, I used an halo mask created from a starmask (with Starmask tool) and a classic star mask (with ClassicStarMask script), subtracting them as showed in the attached icons.

I'm attempting to follow this process but I don't have a script called "ClassicStarMask" where can I find it?