Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: JohnP on Dec 04, 2015, 22:27:46

Title: Mixing two images..
Post by: JohnP on Dec 04, 2015, 22:27:46
Not processed anything for ages.. anyway thought I'd like to see the result of combining the colour data from Mark's (thanks Mark for letting me use this) recent widefield cave image seen here:

http://forum.orpington-astronomy.org.uk/index.php?topic=10566.0 (http://forum.orpington-astronomy.org.uk/index.php?topic=10566.0)

With Ha data I took of the cave over two years ago seen here:

http://forum.orpington-astronomy.org.uk/index.php?topic=9355.msg66679#msg66679 (http://forum.orpington-astronomy.org.uk/index.php?topic=9355.msg66679#msg66679)

obviously images totally different sizes, resolutions & orientation so many thanks to Robert for aligning the cave area of Marks image with mine (I haven't got the software to easily do this). Mark's image was 5.18 arcsec/pixel & mine was 2.2

Anyway layered my Ha on top of Mark's RGB & set blend mode to luminosity. Result as follows:

(http://jpastronomy.co.uk/graphics/OAS/Cave3.jpg)


John
Title: Re: Mixing two images..
Post by: MarkS on Dec 04, 2015, 22:36:06
That's actually come out rather well!

Mark
Title: Re: Mixing two images..
Post by: JohnP on Dec 04, 2015, 22:45:47
well im sure in your expert hands it would have come out a lot better - all processing done with jpeg's. I also heavily blurred your RGB data (hence no star spikes)..
Title: Re: Mixing two images..
Post by: Carole on Dec 05, 2015, 12:32:47
Beautiful and smooth John, a great combined effort.

Carole
Title: Re: Mixing two images..
Post by: JohnP on Dec 05, 2015, 12:53:53
Thanks... thing that interests me is that you can combine pretty much any images nowadays as long as they cover similar areas of sky.. Makes combining high resolution Ha data with lower resolution RGB (from say a one shot DSLR) definitely doable..
Title: Re: Mixing two images..
Post by: The Thing on Dec 05, 2015, 15:47:01
That really is a good looking image John.
Title: Re: Mixing two images..
Post by: JohnP on Dec 06, 2015, 17:00:22
Cheers Dunc.. John