DaveS Posted April 3, 2022 Share Posted April 3, 2022 (edited) Hickson 44 or the Leo Quartet from my ODK rig. This is 5 hours Bin 1 Luminance plus 2 hours each Red and Green, and 3 3/4 hours Blue in Bin 2 and G2v calibration for a total of 12 3/4 hours. Not nearly enough. Stacked in AstroArt 8, Sigma+Add with full calibration then each stack cropped and reduced gradient. Luminance given a hard DDP with High Pass filtering to bring out differences in brightness, then a Richardson-Lucy deconvolution. RGB stacks upscaled to match the luminance then given a soft DDP with no High Pass. Then a light denoise. The individual RGB plates were co-registered with the the Luminance before being combined into a RGB plate. This was given a modest Saturation Boost and a slight Hue adjustment before LRGB synthesis. There were also several crops to remove alignment edges. This is the whole image, a cropped and rotated version is in the Galaxy Cluster competition. Yep, there are some dodgy star cores (From the High Pass DDP). Nope, I can't be asked to "fix" them. Edited April 3, 2022 by DaveS Typo in title. 11 Link to comment Share on other sites More sharing options...
DaveS Posted April 4, 2022 Author Share Posted April 4, 2022 Looking closely at the brighter stars especially I can see some red - green fringing due to slight errors in the RGB alignment before Trichromy. I've been cheating the alignment by a pixel here, a pixel there but it's proving fiddly and tricky to get it "just so". If I *do* manage to solve the problem I will post an update. Link to comment Share on other sites More sharing options...
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