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Old 20-07-2016, 09:25 AM
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Andy01 (Andy)
My God it's full of stars

Andy01 is offline
 
Join Date: Mar 2012
Location: Melbourne
Posts: 3,253
Experimental Star removal technique

Regarding stars, fwiw I have been experimenting with a new technique for NB imaging to retain "Natural" RGB star colours.
Maybe it's just me but I think magenta stars look very un-natural on NB images.

Instead of completely removing the stars from the Ha/O3 & S2 stacks with Straton or a PS action and potentially degrading the image quality, I've been using several iterations of Annies' Astro Actions "Reduce Star Size" to simply make them a LOT smaller.

Then after the image files are stacked/aligned/hue/saturation etc. I'm using PS>Filter> Noise>remove colour noise to remove the offending star colours. see http://bf-astro.com/hubblep.htm

Then I place my aligned RGB stars as a layer over the top using "Lighter colour" blend mode and viola, happy natural coloured stars and a sharp image.

The remaining tiny stars are basically white and dim so they don't bother me, as long as the main larger ones are a natural colour.

Has anyone else tried something like this?
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