How to combine RGB with HOO narrowband in PI?

[Stuart]

Hi all,
Working with an image (not ready to post yet). It's a planetary nebula that has a lot of Ha and O3, and I have LRGB as well as Ha and O3 data. Here is a process by multiple APOD award winning astrophotographer Steve Mazlin. http://ourcolorfulcosmos.com/mazlin/wp- ... S-9O94_6NM

I am one of his partners and I am working with exactly the same data, but in PI I can't seem to get his result--mine is greener than his. (He is an exclusive Photoshop user).

I have used the NBRGB script both in linear and nonlinear, but I can't seem to squeeze the right color out.

So my question for everybody is how do you combine narrowband, specifically HOO narrowband with broadband data? Do you do it linear or nonlinear? Do you use the NBRGB script or do you have your own Pixelmath expression? IF you do nonlinear, do you do LRGB combination first?

I'm not sure if there is any one answer to this, but it's worth an ask.
Stuart

[JimMinCT]

I use the AIP SHO script that PI stopped including in the build after one of the upgrades.
It didn't conform to one of their specs, and they couldn't contact the original author to get an updated version, IIRC...
I'm attaching it here. unzip it into the scripts folder and add it in the scripts/feature scripts.

It's still the best, most complete way to combine data I've seen yet.
Good Luck!

AIP-Multichannel.zip

(89.59 KiB) Downloaded 88 times

[Stuart]

Thanks JimMin! I have the script. I'll try the other one, though.
I have another idea, I've been playing around with the SCNR with some masking.