Quote:
Originally Posted by Octane
What I might try doing is a DBE on each channel before running LinearFit. I understand that it is often best to LinearFit to the channel with the lowest signal, otherwise you run the risk of increasing noise if trying to fit low signal channels to high signal ones. Makes sense. So, this time, I will try to fit to SII instead of OIII. At any rate, it can't hurt to try.
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Hi H,
Sounds reasonable but the weakest channel still needs to be stretched to match the others for a good colour balance so the noise is going to get increased anyway. That's another thing addressed in JPM's tone mapping technique - you can do a heavy noise reduction on the weak channels.
Quote:
Originally Posted by Octane
If you can email me a copy of your script to my email, I'd appreciate it. I'll send you a message on spacebook.
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Will do! There is an example of its use here:
https://pixinsight.com/forum/index.php?topic=7751.0
Cheers,
Rick.