#1  
Old 17-03-2011, 07:41 PM
OzRob's Avatar
OzRob (Rob)
Registered User

OzRob is offline
 
Join Date: May 2009
Location: Thailand
Posts: 446
Processing help with M78

This image is the result of 100 minutes of lum (10 minute subs) and 40 minutes in each of RGB (5 minute subs at 2x2). It has taken me a while to get this result due to problems with a couple of gradients.

Short of taking more data (which is not going to be possible with the weather where I am) is there a way of reducing the colour blotching in the background? I have managed to reduce it a bit by using Noel Carboni's tools and noise ninja. Also how can I bring out the dust a bit more?

All input appreciated.
Attached Thumbnails
Click for full-size image (M87 web.jpg)
155.5 KB66 views
Reply With Quote
  #2  
Old 17-03-2011, 08:13 PM
mill's Avatar
mill (Martin)
sword collector

mill is offline
 
Join Date: Oct 2006
Location: Mount Evelyn
Posts: 2,922
Rob do levels then curves and then shadows and highlights.
Reply With Quote
  #3  
Old 17-03-2011, 10:53 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,158
Rob,

There's /way/ more data in there waiting to be teased and coaxed out.

For this reason, it is my belief that you leave any and all noise reduction until just before saving the image for the web. I feel that running noise reduction routines early or part-way through a processing run severely impairs the finer details in the final composition.

H

Last edited by Octane; 17-03-2011 at 11:49 PM.
Reply With Quote
  #4  
Old 17-03-2011, 10:53 PM
Tandum's Avatar
Tandum (Robin)
Registered User

Tandum is offline
 
Join Date: Apr 2008
Location: Carindale, Brisbane.
Posts: 4,113
That is pretty blotchy Rob. Levels/Curves seems to bring up the detail but also the colour noise. Have you looked at each sub in the set? Go throught them and see if some are obviously crap or maybe tighten up the quality checks in maxim to kick out the rubbish from the stack.

Also checkout Annie's Astro Actions for gradient removal. I've recently heard of these tools and they seem to work and are cheapish, see attached examples. Disclaimer, I have not used these actions myself even though the actions where used on my example images here, so I don't know if you have to be a brainiac to use them or not.
Attached Thumbnails
Click for full-size image (M1-before.jpg)
119.2 KB38 views
Click for full-size image (M1-after.jpg)
94.5 KB41 views

Last edited by Tandum; 17-03-2011 at 11:04 PM.
Reply With Quote
  #5  
Old 17-03-2011, 11:00 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,158
Robin,

Is that your M1? That looks awesome. Like a rainbow-spectrum heart beating in space.

H
Reply With Quote
  #6  
Old 17-03-2011, 11:07 PM
Tandum's Avatar
Tandum (Robin)
Registered User

Tandum is offline
 
Join Date: Apr 2008
Location: Carindale, Brisbane.
Posts: 4,113
Tis mine but too late in the season H. Only got 2 sort of useable O3 subs in that set before the rain came back. My new to me RC8 first light.

Ohhh, and 36mm baader filters in a starlight wheel, first light All 7 filters in one wheel at the same time .... at last.

Last edited by Tandum; 17-03-2011 at 11:22 PM.
Reply With Quote
  #7  
Old 17-03-2011, 11:39 PM
TrevorW
Registered User

TrevorW is offline
 
Join Date: Aug 2006
Posts: 6,995
Rob it's not too bad actually I had a quick play with auto levels, auto colour, noise reduction and a 1 pixel smart sharpen then increased saturation slightly also a light gradx
Reply With Quote
  #8  
Old 17-03-2011, 11:40 PM
OzRob's Avatar
OzRob (Rob)
Registered User

OzRob is offline
 
Join Date: May 2009
Location: Thailand
Posts: 446
Quote:
Originally Posted by Tandum View Post
That is pretty blotchy Rob. Levels/Curves seems to bring up the detail but also the colour noise.
Exactly and that is the problem. I will go through the subs and have a look, thanks.

Has anyone compared Annie's Astro Actions to those of Noel Carboni? They both have a similar list of actions.
Reply With Quote
  #9  
Old 18-03-2011, 08:08 AM
Paul Haese's Avatar
Paul Haese
Registered User

Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,429
Rob, this object is pretty tough at the best of times. I ended up doing nearly 16 hours of integration time on this object to get it close to what I wanted. I reprocessed this around 12 times before I was happy.

It is really dim and requires far deeper subs than those you have taken. I went with 20 minutes on lum and blue and 15 minutes on red and green. This at least gives a better background ADU to work with and helps prevent noise such as what you are trying to deal with now.

That said the image contains nice data and if you go to this site http://www.mistisoftware.com/astronomy/Process_m8.htm there is a technique that deals with background noise control. Try using that to change the level of noise. I find it works a treat but have modified the technique a little to suit myself.
Reply With Quote
  #10  
Old 19-03-2011, 04:30 PM
OzRob's Avatar
OzRob (Rob)
Registered User

OzRob is offline
 
Join Date: May 2009
Location: Thailand
Posts: 446
Quote:
Originally Posted by Paul Haese View Post
Rob, this object is pretty tough at the best of times. I ended up doing nearly 16 hours of integration time on this object to get it close to what I wanted. I reprocessed this around 12 times before I was happy.

It is really dim and requires far deeper subs than those you have taken. I went with 20 minutes on lum and blue and 15 minutes on red and green. This at least gives a better background ADU to work with and helps prevent noise such as what you are trying to deal with now.

That said the image contains nice data and if you go to this site http://www.mistisoftware.com/astronomy/Process_m8.htm there is a technique that deals with background noise control. Try using that to change the level of noise. I find it works a treat but have modified the technique a little to suit myself.
Thanks, maybe I'm expecting too much.
Reply With Quote
  #11  
Old 20-03-2011, 03:46 PM
TrevorW
Registered User

TrevorW is offline
 
Join Date: Aug 2006
Posts: 6,995
Rob as there is a lot of dust in the region this could also be attributing to the blotchy effect you are seeing as per this example (not my work)

M 78 in Orion ASA N16 f 3,6 Ignacio de la Cueva, Spain http://icueva.wordpress.com/
Attached Thumbnails
Click for full-size image (m78.jpg)
196.7 KB20 views
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 04:34 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
OzScopes Authorised Dealer
Advertisement
Lunatico Astronomical
Advertisement
SkyWatcher Australia
Advertisement
Bintel
Advertisement
Meade Australia
Advertisement
Celestron Australia
Advertisement
NexDome Observatories
Advertisement
Astronomy and Electronics Centre
Advertisement