View Single Post
  #31  
Old 01-07-2008, 11:12 PM
jase (Jason)
Registered User

jase is offline
 
Join Date: Sep 2006
Location: Melbourne, Victoria
Posts: 3,916
... u p d a t e ...

I don't particularly like rekindling old threads, but considering this is on-topic I'll provide an update.

I've recently reprocessed the HaRGB image of the Dumbbell Nebula utilising 267mins of Ha data (7x900s, 12x600s and 6x480s subs). This didn't do much to improve detail, but reduced noise. In addition, I worked double time on the RGB data in attempt to remove the halos introduced due to the upscaled data. I first combined the RGB data to make a synthetic lum and coupled this with the original RGB. Down scaled the Ha to match the LRGB, then upscaled the new "super" RGB (technically HALRGB) before using the data to colour the Ha. As the Ha data star were tight and small, I simply integrated them using lighten mode. Falling short of collecting RGB data on the 24" RCOS (which was planned but bad weather there has seen no imaging time) this will need to do for now(as I can still see room for improvement). I hope the halos are now to your satisfaction Clive. Happy to hear other constructive feedback.

You can see the "final" result clicking on the link below or on the original link posted;
HaRGB Dumbbell Nebula Revised

Focused on getting the HaRGB image in line. I was unable to revise the NB version of the image in time before I was approached - http://gallery.rcopticalsystems.com/...7mapcolor.html
This will have to suffice, however I do have a bi colour NB image (Ha:OIII) in the mix, but not completed - leaving that for cloud riddled nights... in which we appear to be having a lot of lately I should add.

Finally (off topic), for those that expressed interest to see an un-cropped (100% 1:1 scale) version of NGC6357 in my previous CWAS post - Here it is for your viewing pleasure. ...and for the record, purists who may have got a little upset by me vertically flipping and 180' rotating the wide field image for aesthetic reasons will now be pleased that I have restored equilibrium as shown here.

Cheers
Reply With Quote