Layer Masks

[Fay]

I have taken a selection of subs of M42. I now have to learn layer masking.

Do you stack, subtract dark frames do flat field  & do no processing until after layer masking is finished. Is processing then done on a final flattened image or separately on each layer?


Thanks

[Rocket Pooch]

Hi,

Stack them separately as normal, align them separately for all the fames are aligned then go look at this

http://www.astropix.com/HTML/J_DIGIT/LAYMASK.HTM

If you get board today I'm at home, I can run it through with you, or I'll pop over if you like.

Chris

[Fay]

Thanks Chris,

I will have a go & contact you if I have failed