ICEINSPACE
Moon Phase
CURRENT MOON
Waning Gibbous 98.4%
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09-08-2020, 05:39 PM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by Andy01
Sorry Greg, I agree it looks great at first, but when you dive into the high res the the stars look chunky.
The data is fantastically deep but because you've stretched the heck out of it it looks unnatural.
I encourage you to have another go - but tone map so you remove the stars first, Starnet++ is perfect for this - then stretch it as you have & the pop the stars back in.
Here is a great video tutorial by JP Metsavainio on how it's done.
https://www.youtube.com/watch?v=EQlGsM-S8vM
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Sorry Andy I missed your post. I started watching the video. Quite good.
I did a repro and will post the alternate version which is fairly different really.
Greg.
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09-08-2020, 07:18 PM
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Ultimate Noob
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Join Date: Aug 2011
Location: Melbourne
Posts: 6,983
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Very deep image Greg! The new version definitely has better looking stars than the original
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09-08-2020, 08:49 PM
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Registered User
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Join Date: Jun 2013
Location: Moorooka, Brisbane
Posts: 906
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Having just done a reprocess myself on this one, I tried a similar technique to what Andy suggested. I kept the stars in but used a star less mask to bring the Dolphin/Gourd from the background which left the stars alone. I didn’t get much time on it from the burbs but got a lot out of the data this way. Not sure that helps as I had a quite different FoV. Love love the wider field you here though and the depth of the OIII :-)
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10-08-2020, 08:05 AM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by Atmos
Very deep image Greg! The new version definitely has better looking stars than the original
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Thanks Colin. I'l have to review my processing workflow and add in more star removal techniques.
Quote:
Originally Posted by Benjamin
Having just done a reprocess myself on this one, I tried a similar technique to what Andy suggested. I kept the stars in but used a star less mask to bring the Dolphin/Gourd from the background which left the stars alone. I didn’t get much time on it from the burbs but got a lot out of the data this way. Not sure that helps as I had a quite different FoV. Love love the wider field you here though and the depth of the OIII :-)
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Cheers Ben. Yes that is what I did in the repro.
Greg.
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10-08-2020, 10:41 AM
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Registered User
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Join Date: Jun 2013
Location: Moorooka, Brisbane
Posts: 906
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Quote:
Originally Posted by gregbradley
Cheers Ben. Yes that is what I did in the repro.
Greg.
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My apologies, I think I get the reprocess now. The glow around the Dolphin is perhaps more of the [OIII]? Too used to my limited FoV!
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10-08-2020, 11:42 AM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by Benjamin
My apologies, I think I get the reprocess now. The glow around the Dolphin is perhaps more of the [OIII]? Too used to my limited FoV!
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The pinky area is from the Ha and the blue is the O111.
Greg.
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10-08-2020, 01:39 PM
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Registered User
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Join Date: Jun 2013
Location: Moorooka, Brisbane
Posts: 906
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Quote:
Originally Posted by gregbradley
The pinky area is from the Ha and the blue is the O111.
Greg.
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Very interesting. I had much more limited Ha and [OIII] so must have clipped it from the background. 👍🏻
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11-08-2020, 01:54 PM
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Registered User
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Join Date: Sep 2005
Location: Melbourne
Posts: 1,468
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Great work Greg, the different images in the Cosmos never cease to amaze! Nicely captured.
John K.
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11-08-2020, 02:01 PM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by Benjamin
Very interesting. I had much more limited Ha and [OIII] so must have clipped it from the background. 👍🏻
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I did try to contain these in the background as its easy to have an all lue background with this object. I checked other images of it on Astrobin and mine is more widefield than almost all of them but the ones that do show some of the background show it similarly.
Quote:
Originally Posted by John K
Great work Greg, the different images in the Cosmos never cease to amaze! Nicely captured.
John K.
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Yes I know what you mean. There is always something to image that is interesting.
Greg.
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11-08-2020, 02:32 PM
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Registered User
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Join Date: Aug 2006
Location: Western Australia
Posts: 7,866
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Excellent a joy to view
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11-08-2020, 05:50 PM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by TrevorW
Excellent a joy to view
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Thanks very much Trevor. I am glad you liked it.
Greg.
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11-08-2020, 10:19 PM
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Casual Cosmos Capturer
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Join Date: Jun 2010
Location: Gold Coast SE QLD
Posts: 4,190
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10/10 Greg,, awesome !
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12-08-2020, 12:42 AM
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Registered User
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Join Date: Aug 2006
Location: Western Australia
Posts: 7,866
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Actually Greg your image compares very favorably to an APOD see
https://apod.nasa.gov/apod/ap200302.html
although I believe the finer nebulousness at the edge s of your image is more realistic than a definitive cut off point
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12-08-2020, 06:46 AM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by astronobob
10/10 Greg,, awesome !
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Thanks Bob. I'll probably add to it next year when its around again.
Quote:
Originally Posted by TrevorW
Actually Greg your image compares very favorably to an APOD see
https://apod.nasa.gov/apod/ap200302.html
although I believe the finer nebulousness at the edge s of your image is more realistic than a definitive cut off point
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Thanks Trevor. There definitely is some background O111 and Ha, mostly O111.
Greg.
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12-08-2020, 12:08 PM
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Registered User
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Join Date: Jan 2013
Location: Melbourne,Australia
Posts: 303
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Wonderful!
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12-08-2020, 01:01 PM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by pkinchington
Wonderful!
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Thanks Peter!
Greg.
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12-08-2020, 05:21 PM
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Lee "Wormsy" Borsboom
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Join Date: Jul 2013
Location: Kilcoy, QLD
Posts: 2,058
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Great work, Greg. Love the colours, deep too!
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12-08-2020, 07:33 PM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
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Quote:
Originally Posted by codemonkey
Great work, Greg. Love the colours, deep too!
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Cheers Lee. I'll revisit it next year when it comes around again.
Greg.
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13-08-2020, 09:22 AM
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Billions and Billions ...
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Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,141
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I've looked at this several times since you posted it Greg and I have to say it's a pleasure seeing something different and something that's difficult to image. So on that score alone, well done! I actually prefer your original processing. It's quite compelling and I particularly like the structure visible in the fainter extents.
I'll be honest though and say that the reprocessed version seems to have obliterated the structure in those fainter extents. Colours notwithstanding, the reprocessed version would benefit greatly if you could restore that structural detail.
Cheers, Marcus
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