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Merging RGB channels in Photoshop

PostPosted: Thu Mar 05, 2015 8:51 am
by swag72
I am looking at putting together video tutorial for processing of images and so thought I'd start off at the beginning of Photoshop - It doesn't look at stacking and alignment procedures. I am assuming that you have 3 individual images that have been taken with a mono camera and red, green and blue filters and that they are already aligned.

This tutorial will then show you an easy way to merge these into 1 RGB image where you can then start to process.

I welcome any feedback as this is the first time I've tried anything like this.


Re: Merging RGB channels in Photoshop

PostPosted: Thu Mar 05, 2015 12:05 pm
by carastro
Well done Sara, very clear. Always nice to give a helping hand to those learning.

I use a slightly different method taught to me by Annie herself of Annie's actions, which is simply to paste previously registered R.G & B images into their respective channels.

What I would really like to know is how you manage to control your stars so beautifully especially I always find the Oiii stars are bigger than the Ha and Sii and the blue often bigger than R & B and haven't yet fathomed out how to deal with that.

Thanks

Carole

Re: Merging RGB channels in Photoshop

PostPosted: Thu Mar 05, 2015 12:16 pm
by swag72
Thanks Carole. I found with the cut and paste way I often endied up with a right mess. This is much easier iny opinion..... But its what you get used to!

If this is well received and people think its useful then I'll work on some more. How do I control my stars? ...... I have no idea!! I don't use masks like many people!

Re: Merging RGB channels in Photoshop

PostPosted: Thu Mar 05, 2015 12:29 pm
by martin_h
Interesting tutorial, many thanks. I hadn't actually thought of doing it that way, I use that method to recombine If I split the channels, but never thought of using it for the initial combine. DOH!
They say you learn something new everyday.........just as well cos I forget something every day as well!

Re: Merging RGB channels in Photoshop

PostPosted: Thu Mar 05, 2015 1:13 pm
by swag72
That's exactly what I was doing Martin - Using this to recombine after splitting channels - But it didn't dawn on me for a couple of years that I could use it to easily make the pre stretch RGB image!

Re: Merging RGB channels in Photoshop

PostPosted: Thu Mar 05, 2015 3:37 pm
by carastro
Yes I also use this method to re-combine channels for instance if I add Ha to the Red layer.

How do I control my stars? ...... I have no idea!! I don't use masks like many people!

Well if you don't have a problem with this and your stars are always so small, I guess it must be the Astrodon filters that give you such great stars.

Carole

Merging RGB channels in Photoshop

PostPosted: Fri Nov 04, 2016 5:26 am
by JosephSmumn
i am REALLY looking forward to this one:-inking and coloring
i have no idea how to do it, and when i see other peoples art and how they are good at colouring in photoshop, i just want to know