There are many sources available that cover SHO, HOO, and HSO channel combinations within Pixel Math. Some of the combinations have not been created by me, I have only tested these combinations. This is a guide only with examples of my results. This page will be updated as more combinations are used.
This is a small list of simple combinations. Individual results will vary.
Standard SHO
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and, Oiii is 1 hour.
Red > Sii
Green > Ha
Blue > Oiii
SHO variation 1
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
Red > Sii*0.6 + Ha*0.4
Green > Ha*0.7 + Oiii*0.3
Blue > Oiii
SHO variation 2
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
R: (Oiii^~Oiii)*Sii + ~(Oiii^~Oiii)*Ha G: ((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii B: Oiii
HSO Variation 3
Performed on data that has been softly stretched. The individual channels have had linear fit, dynamic crop, star alignment and starnett 2 applied. Each channel of SHO is 115 minutes.
Red > Sii*0.8 + Ha*0.2
Green > Ha*0.5 + Oiii*0.5
Blue > Oiii
SHO variation 4
Performed on data that has been softly stretched. The individual channels have had linear fit, dynamic crop, star alignment and starnett 2 applied. Each channel of SHO is 115 minutes.
Red > Sii
Green > Sii*0.5 + Oiii*0.5
Blue > Oiii*.5+Ha*.5
Standard HSO
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
Red > Ha
Green > Sii
Blue > Oiii
HSO variation 1
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
Red > Sii*0.4 + Ha*0.6
Green > Sii*0.7 + Oiii*0.3
Blue > Oiii
Standard HOO
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
Red > Ha
Green > Oiii
Blue > Oiii
HOO variation 1
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
Red > Ha
Green > Oiii*0.8 + Ha*0.2
Blue > Oiii*0.85 + Ha*0.15
HOO variation 2
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
Red > Ha*0.76+Sii*0.24
Green > Oiii
Blue > Oiii*0.85 + Ha*0.15
HOO variation 3
Performed on linear data. After combing the channels, I used Background Neutralization and an STF stretch. No other edits have been made. Ha is 1 hour 40 mins. Sii is 15 mins and Oiii is 1 hour.
R: 1.5 * Ha - Oiii
G: 0.4 * Ha + 0.325 * Oiii
B: Oiii
If you have a combination, feel free to share in the comments section below!
Pixinsight: Pixel Math combinations
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