TerryMcK Posted February 16, 2021 Share Posted February 16, 2021 (edited) NGC7822 in Hubble Pallet images acquired in September 2020 Telescope William Optics ZS103 with x0.8 reducer flattener Camera ZWO ASI183MM Filters Ha, OIII and SII 60 x Ha 180 seconds Gain 111 Offset 8 80 x OIII 180 seconds Gain 111 Offset 8 40 x SII 180 seconds Gain 111 Offset 8 Processed with PixInsight, PhotoshopCC, Topaz Denoise AI Bortle 7/8 with lots of local neighbourhood light polution. Edited February 16, 2021 by TerryMcK 4 Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted February 16, 2021 Share Posted February 16, 2021 33 minutes ago, TerryMcK said: NGC7822 in Hubble Pallet images acquired in September 2020 Telescope William Optics ZS103 with x0.8 reducer flattener Camera ZWO ASI183MM Filters Ha, OIII and SII Processed with PixInsight, PhotoshopCC, Topaz Denoise AI Bortle 7/8 with lots of local neighbourhood light polution. Looking great. Is it a straight up SHO, or a PixelMath blend? Brian Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted February 16, 2021 Author Share Posted February 16, 2021 It was done by first doing a channel combo in SHO Then a STF until it looked ok with a conversion to non linear. Next removed the stars with StarNet (set at stride 32 to minimize artifacts on the large stars) and followed up with denoise in Topaz Demoise AI which is excellent by the way. Then I used SCNR set as the following to remove the green. Then I simply boosted saturation a few times with curves to get the subtle colours in - I learnt that one from Chuck Ayoub on one of his Youtube's. A star reduction on the star mask created by StarNet after doing a Photometric Colour Calibration to get the stars the right colour. Normally I do that before a stretch but did it differently this time. Here are the star reduction settings. and then added the stars back in with PixelMath. I did some local histogram equalization and added a sRGB IEC61966-2.1 colour profile and saved it as a TIF. In PhotoShop I added the labels, flattened it and saved it as a PNG. It was huge but I installed Microsoft PowerToys from here and reduced the PNG size to something forum friendly. Quote Link to comment Share on other sites More sharing options...
Gina Posted February 16, 2021 Share Posted February 16, 2021 Very nice! 👍👍 Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted February 16, 2021 Author Share Posted February 16, 2021 Thanks Gina, I've added a version which hasn't had any star reduction Quote Link to comment Share on other sites More sharing options...
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