Hubble Palette Question

[ajbarr]

I've been using this Pixel Math formula I found on the internet to blend narrowband images into Hubble Palette colors:

R/K  0.4*Ha + 0.6*SII
G  0.4*OIII + 0.3*Ha + 0.3*SII
B  OIII

Can someone please tell me if this is correct and what the numbers mean so I know what adjustments to make.

Thanks

Albert

[vicent_peris]

Hi,

With this palette you have:

R/K  0.4*Ha + 0.6*SII   ---> 40% of H-alpha en 60% of S-II in the red channel
G  0.4*OIII + 0.3*Ha + 0.3*SII   ---> 40% of O-III, 30% of H-alpha and 30% of S-II in the green channel
B  OIII   ---> 100% O-III in the blue channel



Regards,
Vicent.

[ajbarr]

Thanks Vincent. Would you say this is the correct way to do it?

[Philip de Louraille]

This mix works quite well too: (from http://www.astroanarchy.blogspot.com/)

R/K: 80% Ha + 20%SII
G: OIII
B: 85% OIII + 15%Ha

Vicent (or was it Juan?) also proposed another match to get more "natural" colors but I can't find it just now.

[Philip de Louraille]

Found it.
Thread: http://pixinsight.com/forum/index.php?topic=2513.msg25601#msg25601
Juan recommended this combo for RGB:
0.5*S2 + 0.5*Ha
0.15*Ha + 0.85*O3
O3

[ajbarr]

Thanks Philip I'll give it a go