[Shiraz (Ray)]

[QUOTE=gregbradley;1052589]

Originally Posted by Shiraz

thanks Greg. Yes, I was surprised at the colour image, but still need to work on processing. The big problem is that the Ha stars are much smaller than the colour ones, so the nebula surrounding the stars has no colour data (it got lost in the fatter stars). I tried decon and morphological processing, but got nowhere. looks like I will need to separate out the stars and the nebula for different processing. Rick did something similar, putting broadband stars in a narrowband image, so it can be done.

Oh I see. I have used the RGB star layer under the Ha or narrowband image and then set the rgb star layer to lighten mode. Now anything lighter will show through. You can then boost the rgb star layer if needed or do a mask on the brigher stars of the narrowband image to help if needed.

I did this here and it worked well:

http://www.pbase.com/gregbradley/image/137164599


Greg.

thanks for that info Greg. looks like it works well.

Originally Posted by RickS

A great menagerie of LMC objects, Ray! I really like the colours of the HaRGB image.

I have played around with several techniques for matching star sizes but haven't found a silver bullet yet. As Greg mentioned, deconvolution is worth a try. It's a lot easier when you're only interested in the RGB stars because it doesn't matter if the decon messes up everything else

Cheers,
Rick.

thanks Rick. The big issue is that there is a region between the RGB star edges and the much smaller narrow band star edges that does not have any nebula colour (the RGB stars swamped it) - I need to reconstitute that lost data somehow. Otherwise, using Ha as the luminance channel looks to be quite useful.

Originally Posted by dutch2

Lovely images, Ray.
Well done.

Thanks Ingrid - appreciate the comment.

regards ray