Erosion Filter?

[sreilly]

I have to admit I'm not familiar with the Morphological Process at all but understand that it might play a role in eking out some really faint detail in my recent image of LBN576 where the nebula makes a very faint appearance. This image is a LRGB image consisting of 10 hours luminance data, 3 hours each of red, green, and blue. Processed in PixInsight, the image can be seen here http://www.astral-imaging.com/LBN576-RC2.html What I can't seem to find is some idea on how to use this tool to get the detail out. Any suggestions would be greatly welcomed.

Thanks,

[gvanhau]

Hello Steve

You could try the following:
Frist make a star mask:  take for noise threshold the aproximate background level of your image; for scale take about 5 or 6;  set structure grouths to 0; For smoothness use about 8; check contours; leave the rest as default and apply.
This should give you a mask of donuts arrount most of the stars.
Apply the mask to your image.
Now, with The morfological process, use a structure about 5 or 7 and select circle shape.
Select erosion, select iterations according to the effect you want.
Select amount to a small value (0.1 to 0.3)
Apply (try first on a preview).

This should reduce your stars ..... and allow space to enhance the DSO.


Regards
Geert

[sreilly]

Thank you Geert, I'll try this soon.

Steve