Trying to create a star mask of image with many (many) small stars

[mstriebeck]

I want to create a star mask for my narrowband images which contain LOTS of stars. I found several tutorials here and followed them. But I can never create a star mask that contains all the little stars. I uploaded one of my images here: https://dl.dropboxusercontent.com/u/71789253/SII_cropped_DBE.fit

Any ideas or pointers are welcome!

Thanks
     MarkS

[Harry page]

Hi

This gets pretty close


Harry

[mstriebeck]

Wow! How did you get this?

[pfile]

mark - it's mainly the low noise threshold and the stretch that's applied to the image before computing the mask (the sliders at the bottom).

rob

[Harry page]

Hi

It was quite fiddly to get the right settings , as always a bit of trial and error 

Harry