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NGC 7023 - Iris Nebula [Up Close]

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#1 mmalik

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Posted 29 November 2012 - 05:22 AM

NGC 7023 (Caldwell 4) - Iris Nebula [Up Close]. Sep 9, 2012

The Iris Nebula is a bright reflection nebula in the constellation Cepheus. It lies 1,300 light-years away and is six light-years across [Wikipedia]. NGC 7023 lies in a region of the Milky Way darkened by dust, within which the nebula is embedded. Within the Iris, dusty nebular material surrounds a massive, hot, young star in its formative years. Central filaments of cosmic dust glow with a reddish photo-luminescence, as some dust grains effectively convert the star’s invisible ultraviolet radiation to visible red light. Yet the dominant color of the nebula is blue, characteristic of dust grains reflecting starlight. [SkySafari Pro]

•5x5min, 3x15min, & 10x5min
•ISO 500, 800, & 1600
•120min integration, guided
•Canon 60Da/IDAS LPS-P2/254mm TMB APO/elCapitan
•Cropped frame
•Moon 40%
•Previous thread...[/color]

Processing Workflow: (Instructions here...)
•RAW file conversion in ImagesPlus 5.0
•Align TSR/Combine in ImagesPlus 5.0
•Crop in ImagesPlus 5.0
•Digital Development in ImagesPlus 5.0
•Multi Point Flatten Background-Planar in ImagesPlus 5.0
•Multiresolution Smooth-Sharpen + Invert Mask in ImagesPlus 5.0
•Geometric Transform/Scale in ImagesPlus 5.0
•Adaptive Richardson-Lucy Restoration + Luminance Mask in ImagesPlus 5.0
•Smoothing in ImagesPlus 5.0
•Saturation (Block), Contrast, and 'Noise Reduction' in Photoshop Extended CS6
•Star Size and Halo Reduction in ImagesPlus 5.0


Combined/Unprocessed FITs full/cropped here...

Attached Files



#2 dp297

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Posted 29 November 2012 - 06:16 AM

Very nice closeup.....
Beautiful.....
I must also admit that it is very nice of you to attach the unprocessed files for practice.

#3 nikao

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Posted 29 November 2012 - 06:20 AM

Nice!
To me it's a bit to 'soft' however. Might be the processing

#4 mmalik

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Posted 29 November 2012 - 07:05 AM

Thanks Dimitris; I recall your stunning work on Iris.

Nikao, I would say, yes; partly intentional on my part to not over do. Please feel free to try out the FITs and post results. Regards

Edit: Nikao, I have updated the image in first post; I added 'Star Size and Halo Reduction' step which seemed to have helped sharpen it. Thx

#5 fco_star

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Posted 29 November 2012 - 07:17 AM

Beautiful.... great job

#6 jambroseus

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Posted 29 November 2012 - 08:10 AM

Good close-up and color. Perhaps a tad of sharpening would help...

John

#7 srosenfraz

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Posted 29 November 2012 - 11:46 AM

Very nice capture, Mike.

#8 fco_star

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Posted 29 November 2012 - 07:37 PM

mmalik, I try your data but I have to use Nebulosity to change the format from FIT to TIF and I get this lines over the picture because is the free (practice version)
I really enjoy using such a good data
hope you like my version / I use PS to process it

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#9 mmalik

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Posted 30 November 2012 - 01:11 AM

Perhaps a tad of sharpening would help...


Thanks Jose/Scott.

John, for Iris I have relied more on 'less smoothing' than sharpening per se. Mike U. put it nicely in one... thread, "Not much reason to smooth an area only to sharpen it later."

Edit: John, I have updated the image in first post; I added 'Star Size and Halo Reduction' step which seemed to have helped sharpen it. Thx

#10 mmalik

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Posted 30 November 2012 - 01:15 AM

Thanks Francisco; your image looks good. Lines make it look like an Iris shadow on the boardwalk.

#11 jambroseus

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Posted 30 November 2012 - 09:49 AM

Looks better Mike, but this is more of what I had in mind...
(Hope you don't mind)

John

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#12 zjc26138

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Posted 30 November 2012 - 10:14 AM

Beautiful image!

#13 mmalik

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Posted 30 November 2012 - 05:19 PM

Looks better Mike, but this is more of what I had in mind...
(Hope you don't mind)


Looks sharp John; thanks for re-processing. Could you share your processing workflow?

Folks are very welcome to try processing and sharing results, reason I have been posting unprocessed FITs. Regards

#14 Nils_Lars

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Posted 30 November 2012 - 11:50 PM

Very cool this close , super details.

#15 mmalik

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Posted 01 December 2012 - 01:05 AM

Thanks Zach/Erik.

Note: I have updated image in the first post that's bit sharper than the original one I had posted.

#16 jambroseus

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Posted 01 December 2012 - 08:47 AM

Mike, just used the star size and halo reduction in ImagesPlus - One command and out.

John

#17 dp297

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Posted 01 December 2012 - 12:31 PM

My rendition is on the fly but ...what the heck...I might as well post....

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#18 mmalik

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Posted 01 December 2012 - 04:05 PM

Dimitris, thanks for sharing your rendition; better color balance. Also like the way you have made that smaller rift around star so prominent. Regards

#19 fco_star

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Posted 02 December 2012 - 10:48 AM

Dimitris, nice job in such a good data !

#20 dp297

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Posted 02 December 2012 - 05:06 PM

Thanks a lot!

#21 mikotoy

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Posted 03 December 2012 - 09:32 PM

Here's my go at your data. I used PixInsight and still learning quite a bit, but thank you for the opportunity. The LP gradients were a bear to remove, but that just means more practice with ABE, DBE and ACDNR :).

Where in MN do you image? I work out in Minnetonka and looking for a nice dark sight on that side of town to use if I'm ever late at the office.

Before:
Posted Image

After (darker):
Posted Image

After 2 (midtone increase):
Posted Image

#22 Mike7Mak

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Posted 04 December 2012 - 01:07 AM

I used the fits download for this one. :) I have to open/save them first in Nebulosity, for some reason StarTools won't open them as downloaded.

Another nice one, thanks again for putting them out there.

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#23 Mike7Mak

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Posted 04 December 2012 - 05:10 AM

And the center crop processed from scratch...

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#24 mmalik

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Posted 04 December 2012 - 05:19 AM

Good looking results mikotoy/Mike; thanks for trying the FIT. Regards

#25 mmalik

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Posted 28 May 2013 - 01:28 AM

Another rendering of Iris Nebula; more of a PixInsight learning exercise. I did go beyond PixInsight to include some aspects of ImagesPlus and Photoshop processing. Comments/critique welcome.

Following is the complete workflow; most of it is well documented here.... Regards

PixInsight:
1. RAW File Processing & Calibration [Linear data]
2. Alignment (Registration), Integration and Crop [Linear data]
3. SKIPPED---DBE (Gradient Removal) [Linear data]
4. SKIPPED---Color Calibration [Optional] [Linear data]
5. ATrous Wavelet Transform (Noise Reduction) [Linear data]

---Linear/NON-Linear demark---

6. Histogram Transformation
7. SKIPPED---SCNR (Noise Reduction)
8. HDR Multiscale Transform [IMPORTANT]
9. SKIPPED---Local Histogram Equalization (Contrast) [Optional]
10. ACDNR (Noise Reduction)
11. SKIPPED---Curves Transformation (Saturation)
Saved as 16-bit unsigned TIFF for ImagesPlus/Photoshop processing

ImagesPlus/Photoshop:
12. Geometric Transform/Scale [0.5] (ImagesPlus)
13. Smoothing & Noise Reduction (ImagesPlus)
14. ProDigital ‘Deep Space NR’ and HLVG (Photoshop)
15. Saturation (Block: 1 pass) and Noise Reduction (Photoshop)
16. Star Size & Halo Reduction, and Saturation (ImagesPlus)
17. Levels, Curves, Contrast, Vibrance and Color Balance (Photoshop)
Saved as JPG for posting

Larger JPG here...

Note: PixInsight-CR_CR_Integration.fit for practice available here.... Start with ATrous Wavelet Transform if you use provided FIT.

Attached Files








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