BackgroundNeutralization with semi-transparent nebule

[mstriebeck]

Hi,

I took images of the "Baby Eagle Nebula":


There are pretty bad gradients in it. But as you can see, the lower half of the image has some semi-transparent nebulosity. How can I remove gradients from there without removing the nebulosity? When I set sample points in the nebulosity it almost disappears. When I don't set any sample points, the gradients in that area remain.

Thanks
    Mark

P.S: Here is the FITS file if somebody wants to try it: https://drive.google.com/file/d/0B0KcEqw-v71VSmw3a2liRmJ4ZW8/view?usp=sharing

[Dimitris Platis]

With a simple application of ABE the gradient disappears while the nebulosity remains

[jkmorse]

+1 on Dimitris' solution.  When I have an image full of nebulosity, ABE at the default settings often does way better than anything I can do with DBE.  If that doesn't work, check out this post for some ideas on how to use DBE is tough situations:

http://pixinsight.com/forum/index.php?topic=8984.msg57891#msg57891

Best,

Jim