M13 star colors
Posted: Fri May 13, 2022 12:27 am
M13 is one of those objects where (I think!) there is a definitively correct color palette. For example, the image at https://science.nasa.gov/colors-and-magnitudes-m13 shows a mix of blue and reddish, along with spectral data supporting that.
In my own M13 image: I'm having trouble getting the not-blue stars to be more red. When I start the color module, everything is very green (this being OSC data), so from there I'm just mashing the sliders around - handicapped by the fact that I don't have a good intuitive sense for what change to any one slider would have on the overall colors (I can't choose good colors for a room, or even dress myself in matching colors either!).
Should anyone have some spare time, the unproccessed stack is here: https://www.dropbox.com/s/h4lp0qf6i43wo ... 5.fit?dl=0
Maybe my data just won't go there, or maybe someone with a better understanding of color space can give me a combination of "reduce bias" settings that give colors more like the 'correct' colors.
Aside: The Tame HDR preset made the "propeller" leap out. I think it's overcooked and won't use that for my final image, but I'm sure I'll show it on CN so people can say "You got the propeller!" I think a version with no use of HDR at all looks more like a proper globular cluster to me.
In my own M13 image: I'm having trouble getting the not-blue stars to be more red. When I start the color module, everything is very green (this being OSC data), so from there I'm just mashing the sliders around - handicapped by the fact that I don't have a good intuitive sense for what change to any one slider would have on the overall colors (I can't choose good colors for a room, or even dress myself in matching colors either!).
Should anyone have some spare time, the unproccessed stack is here: https://www.dropbox.com/s/h4lp0qf6i43wo ... 5.fit?dl=0
Maybe my data just won't go there, or maybe someone with a better understanding of color space can give me a combination of "reduce bias" settings that give colors more like the 'correct' colors.
Aside: The Tame HDR preset made the "propeller" leap out. I think it's overcooked and won't use that for my final image, but I'm sure I'll show it on CN so people can say "You got the propeller!" I think a version with no use of HDR at all looks more like a proper globular cluster to me.