[nebulosity. (Jo)]

Originally Posted by RickS

I have spent a fair amount of time experimenting with methods for doing this in PixInsight. Similar techniques can probably be used in other image processing packages...

The best way I have found so far is to decompose the NB and RGB images into CIE L*a*b* channels. A star mask is used to protect everything except the stars in the NB a* and b* channels. Blend the RGB a* data into the NB a* and the RGB b* into the NB b*. Then recombine the NB L* with the modified NB a* and b* and voila! This works well because it only changes the colour of the stars and leaves the stellar profile (Lightness channel) unchanged.

Cheers,
Rick.

Thanks for the info Rick great to have on hand.

Jo