Hi All
I've spent quite a bit of time on PixInsight over the past year, but M81 / M82 is really causing me to loose what hair I have left on my head, I can't seem to minimise the background noise without it getting blotchy, this is what I tried so far
1. Performed a DBE on LUM Image
2. Auto STF on LUM image
3. Clone out to secondary image
4. Apply Auto STF to HT and apply to Clone
5. Use Clone as Inverted Mask on LUM image
Now I have tried ACDNR, MLT, MMT all with mixed results, attached is my Luminance Image, I have an RGB and HA image to process as well, but I am starting with the Luminance image and maybe I could learn where I am clearly going wrong
The Fits file can be downloaded from here
https://www.dropbox.com/s/tajcfqwpjzszmbn/L%20-%2060x300S%20-%20DBE.fit?dl=1Looking to learn

Simon