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Old 03-09-2009, 08:49 AM
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dugnsuz (Doug)
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Join Date: Aug 2005
Location: Hahndorf, South Australia
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Quote:
Originally Posted by troypiggo View Post
Interesting. I had assumed you'd use the whole Ha data and put it all in one channel, all OIII in another channel etc.

Using the above method, what do you do if you want to add SII? It's primarily red also. If you were to only use the blue or green from it, be very faint? Or do you take from it's red channel only, and put that in the synthetic green channel or whatever? As I said, I had assumed you'd put it all in one channel.
Hi Troy,
This is the method I hope to try...
http://www.starrywonders.com/bicolortechniquenew.html

Re Ha - all the useable data is on the red channel, so I split the Ha into RGB components and use the red as my Ha for subsequent work. I've found a straight change of the original RGB file into grayscale loses all the contrast.

With this in mind, I wondered if most of the data in an OIII image resides in either the green or blue channels - which one to use!!??
Inspection of the images suggests there's an equal distribution of data over the G and B.
May try and develop my own method

Cheers
Doug
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