Being able to separate the star field from the main (typically deep-sky) object can be very useful at times, be it to make easier to process the deep-sky object, or be it for pure curiosity about the result.

Starnet++ is an amazing tool, using a neural network, to achieve exactly this.

It is remarkably easy to use and free. Kudos for the team that created it !

https://sourceforge.net/projects/starnet/

The below image depicts the process to enhance a deep-sky object.