Page 1 of 1

M51 redone...

Posted: Sun Apr 05, 2020 11:36 pm
by UlteriorModem
I had kind of promised to re-visit this data. The data is quite good and was able to get results from it.

Managed to stifle the low scale noise and still keep a lot of the nebulosity of the galaxy visible. Had a little fun with the color too :D

ImagePass 2 by Tom Whit, on Flickr

Re: M51 redone...

Posted: Sun Apr 05, 2020 11:54 pm
by Mac
UlteriorModem wrote: Sun Apr 05, 2020 11:36 pm I had kind of promised to re-visit this data. The data is quite good and was able to get results from it.

Managed to stifle the low scale noise and still keep a lot of the nebulosity of the galaxy visible. Had a little fun with the color too :D
Very very nice Tom. Tell us your secrets to reduce noise :D

Re: M51 redone...

Posted: Mon Apr 06, 2020 12:34 am
by TheButcher
Excellent Tom, Great Job!

Re: M51 redone...

Posted: Mon Apr 06, 2020 1:18 am
by UlteriorModem
Mac wrote: Sun Apr 05, 2020 11:54 pm
UlteriorModem wrote: Sun Apr 05, 2020 11:36 pm I had kind of promised to re-visit this data. The data is quite good and was able to get results from it.

Managed to stifle the low scale noise and still keep a lot of the nebulosity of the galaxy visible. Had a little fun with the color too :D
Very very nice Tom. Tell us your secrets to reduce noise :D
I use pixinsight careful use of range mask + star mask (in pixel math) to create a mask that covers the stars and hopefully most of the object. Then hammer at it with MLT.

Getting the mask right is the trickiest part. Lots of trial and error there because every set of data is different :D

Re: M51 redone...

Posted: Mon Apr 06, 2020 2:27 am
by Don Quixote
Very nicely done, Tom.

Re: M51 redone...

Posted: Mon Apr 06, 2020 12:26 pm
by Mac
UlteriorModem wrote: Mon Apr 06, 2020 1:18 am
I use pixinsight careful use of range mask + star mask (in pixel math) to create a mask that covers the stars and hopefully most of the object. Then hammer at it with MLT.

Getting the mask right is the trickiest part. Lots of trial and error there because every set of data is different :D

Thanks Tom... I haven't done much with masks in PI, the next step in my editing evolution.

Re: M51 redone...

Posted: Mon Apr 06, 2020 6:39 pm
by UlteriorModem
It's fairly easy once you get the hang of it using PI's Range mask, and Star mask. Like I said a good deal of trial and error is required to get the results you want as every set of data is different.

What I do is create a range mask, and a star mask, then 'merge' the two using pixel math to make a 'master template'. The idea is to protect the stars and target data while you manipulate the background.

Watch the 'fuzziness' of the masks you dont want them too sharp, if you do you will see some weirdness after altering the background.