Hi all,
I took RBG star images for my M16 in SHO. However, once I introduce the RGB stars to my SHO image, they turn full magenta. If I invert the image and use SCNR, they all turn yellow. I can't seem to introduce my RGB stars, which have a nice array of colors, into my SHO image without losing the RGB color.
How are you extracting and recombining?
Without knowing what software you are using and how you integrate the star image in the SHO one, I doubt anyone will be able to answer.
Please add details about your workflow.
How are you adding the stars back into the image? Are you screening them?
I add my stretched stars back into my stretched nebulosity, using the following pixelmath expression:
~(~stars * ~nebulosity)
How do you do that? And what are you using for it? Assuming PI you would need to do this in PixelMath
~((Starless_M16)*(~RGB_Stars))
Have you set the Stars image to RGB colour space?
i assume you first remove the stars in the SHO image, right?
That may sound stupid, but so far, the only reasons for magenta stars would be
- its SHO data
- you addes the stars like GRB or RBG instead of RGB
Maybe just color calibrate your SHO stars with the new PSCM tool from Rainer Raupach. There is no need to shoot RGB stars separately anymore.
I never used it so far, but in PI, there is a script in the Utilities section called Correctmagentastars. Perhaps this might help.