Suggestions for color correction in underexposed milky way photo

Started 8 months ago | Discussions thread
Alen K
Alen K Senior Member • Posts: 1,381
Re: Suggestions for color correction in underexposed milky way photo

Your problem appears to be caused by sky glow. The greenish hue is caused by light added to the scene from the air itself (a phenomenon called airglow) or (probably not in this case) from man-made light sources (light pollution).

In the case of airglow, some people choose to leave it in the image, particularly if it shows some structure (bands) as it often does, since it is after all a natural phenomenon.

However, to remove it or the glow from light pollution requires in a general sense, subtraction of this extra light from the scene. You will not fix it using levels or curves (a point made in Clark’s article). There are some techniques for removing skyglow that work in a general photo-processing program like Photoshop, but the most effective methods are only found in astro-specific programs such as Siril and PixInsight.

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