Reducing Stars

[Farzad_k]

Hello,

On my first attempt at LRGB processing I followed the great tutorial by Light Vortex Astronomy, and it improved the quality of the final image that was originally littered with stars, so much that I am not sure if I did a good job at DBE, color calibration of background neutralization. In my final image some nebulosity was lost.

I wonder if star reduction can be done earlier on and maybe just before DBE.

The final - star reduced image can be seen here: https://flic.kr/p/XNRqbw
The one with a lot of stars is here:https://flic.kr/p/XMt5qu


Thanks.

[bvalente]

it's a nice first shot

there is still a lot of background unneveness. you might try ABE rather than DBE and see how it goes

i don't think star reduction is going to make a difference for DBE success.


B

[giumar69]

Hello Farzad_k,
I also don't think that DBE, or ABE, affects star selection.
Take into account that StarMask utility is strongly simplified by using a preliminar hard compression of dynamic range, following the suggestion of Juan Conejero, reported as anwer in the following post:
   https://pixinsight.com/forum/index.php?topic=4559.0

By using that method, the risk of selecting part of nebulae is actually negligible.
You can note the adoption of Contour option to select the stars' halos; however, specially in a first reducing step, could be better to select the stars entirely, before applying the Erosion (minimum) filter.

Sincerely,
Giuseppe.