Go Back   IceInSpace > Equipment > Astrophotography and Imaging Equipment and Discussions

Reply
 
Thread Tools Rate Thread
  #1  
Old 12-06-2016, 08:58 AM
brisen (Brian)
Registered User

brisen is offline
 
Join Date: Aug 2013
Location: Caboolture, Australia
Posts: 219
Increasing the size of a taregt in Pixinsight processing

I have been collecting some data on NGC5189 and intend processing in PI. NGC5189 is tiny and I would like to dramatically increase the size of the target in the processing if I can to allow for the detail in the PN to be seen.

I have attached a copy of one of the lum files with the target centred but it is tiny in size. I am wondering if there is a way to increase the size when processing the stacked image in PI.

Any ideas would be welcomed.

Brian
Attached Files
File Type: pdf Lum jpeg.pdf (442.3 KB, 18 views)
Reply With Quote
  #2  
Old 12-06-2016, 10:26 AM
RickS's Avatar
RickS (Rick)
PI cult recruiter

RickS is offline
 
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
It's a very small object so there are limits to what you can do with a ground-based imaging system limited by seeing. Drizzle integration in PixInsight will let you upsample to higher resolution. That's worth a try but will only give you an improvement in image detail if the seeing, guiding, optics, etc. were good enough to support the smaller image scale.

Cheers,
Rick.
Reply With Quote
  #3  
Old 12-06-2016, 10:31 AM
brisen (Brian)
Registered User

brisen is offline
 
Join Date: Aug 2013
Location: Caboolture, Australia
Posts: 219
Thanks Rick. I will give that a try when I process the data.

Brian
Reply With Quote
  #4  
Old 12-06-2016, 10:35 AM
RickS's Avatar
RickS (Rick)
PI cult recruiter

RickS is offline
 
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
It's pretty easy to try, Brian. I'd be interested to hear how you go and also happy to help if you have any problems. I use Drizzle a lot, especially with data I get from SRO in California where the seeing is often excellent.

Cheers,
Rick.
Reply With Quote
  #5  
Old 16-06-2016, 01:27 PM
sil's Avatar
sil (Steve)
Not even a speck of dust

sil is offline
 
Join Date: Jun 2012
Location: Canberra
Posts: 1,402
I've had success with just scaling the image in PI to something larger and then being able to see the bad artifacts easier as i push the processing then a final step to rescale down to original size and i get more contrast and detail this way. do all this at a 64bit depth if possible to give you room to play with pushing the signal. I'm sure someone will say 64bit is useless if you're captured 8-16bit subs but hey i dont mind and my computer is happy.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 12:49 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Astromechanics
Advertisement
Lunatico Astronomical
Advertisement
Star Adventurer
Advertisement
Testar
Advertisement
Celestron RASA
Advertisement
EQ8-R
Advertisement
Bintel
Advertisement
Astronomy and Electronics Centre
Advertisement