As previously discussed in https://roslistonastronomy.uk/window-sill-trapezium-dehaloed Here is the method in words: Preamble. We need to do 2 things. We need to create an image which will provide the in-fill for the dark haloes. We need to create a layer mask that just has the haloes, but is otherwise opaque. We then use this mask and … Continue reading The dehalo method for deep sky objects using GIMP.
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