Trichromy for Ha, OIII and SII filters

Image processing, astrometry, photometry, etc.
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TKnightKY
Posts: 13
Joined: 08 Jan 2019, 15:44

Trichromy for Ha, OIII and SII filters

Post by TKnightKY » 08 Jun 2022, 18:16

Would it be possible to add a HA, OIII & SII selection in Trichromy for processing narrowband images. I know HA and SII filters are both in the red spectrum but making HA less red or even orange would help. As of now, I use Photoshop to change the green HA images toward the red.

Thanks,
Tony

fabdev
Posts: 461
Joined: 03 Dec 2018, 21:43

Re: Trichromy for Ha, OIII and SII filters

Post by fabdev » 10 Jun 2022, 14:12

Hi, in the Trichromy Window you may use the color matrix,
for example:
R -> 0.75 SII + 0.25 Ha + 0.00 OIII
etc.

TKnightKY
Posts: 13
Joined: 08 Jan 2019, 15:44

Re: Trichromy for Ha, OIII and SII filters

Post by TKnightKY » 10 Jun 2022, 20:43

Thanks for the reply. I have tried changing the values but haven't found the right combination yet. I will continue to try.

Tony

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