Processing Challenge 30 - A Bubble and a Cluster

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Processing Challenge 30 - A Bubble and a Cluster

#1

Post by Jockinireland »


This month we have a widefield of my favourite DSO the Bubble Nebula which is beautifully framed to include the open cluster M52. This comes from @AstroBee and his wonderful sky's in Nevada Thanks AB. Its a bit unusual because we have full LRGB data and also HSO data. So there are any number of permutations for how to combine this one.

Original post including capture details can be found here viewtopic.php?f=66&t=15160&p=127673&hil ... le#p127673

Data is available here as Fits and also 16b tiff. https://1drv.ms/u/s!Alj6NhuYfZtW22s8i97 ... 2?e=PeXGav

As always, download, process and post back in this thread with details of how you did it.

Enjoy the challenge.

Take care

David
Last edited by Jockinireland on Sun Feb 27, 2022 11:05 pm, edited 1 time in total.
Scope: Skywatcher Evostar 80ED (SW 0.85 FR/FF) on a SW NEQ6Pro
Guiding; SW Evoguide 50ED, ASI 120mm mini
Meade 8" LX200 GPS on wedge (Guided with a cheapo 50mm guidescope and a ZWO ASI 120mm mini)
Sharpstar 61EDPH II (with dedicated 0.8 reducer) with wiliam Optics 32mm uniguide
Camera: ASI2600MC pro. QHY 163M with ZWO 7nm NB filters, Canon EOS700D astro mod
Secondary mount: Skywatcher StarAdventurer

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Re: Processing Challenge 30 - A Bubble and a Cluster

#2

Post by AstroBee »


I had forgotten all about this data. I'm excited to see what others can do with it!
Greg M.~ "Ad Astra per Aspera"
Scopes: Celestron EdgeHD14", Explore Scientific ED152CF & ED127 APO's, StellarVue SV70T, Classic Orange-Tube C-8, Lunt 80mm Ha double-stack solar scope.
Mounts: Astro-Physics Mach One, iOptron CEM70EC Mount, iOptron ZEQ25 Mount.
Cameras: ZWO ASI2600mm Pro, ZWO 2600MC Pro, ZWO ASI1600mm
Filters: 36mm Chroma LRGB & 3nm Ha, OIII, SII, L-Pro, L-eXtreme
Eyepieces: 27mm TeleVue Panoptic, 4mm TeleVue Radian, Explore Scientific 82° 30mm, 6.7mm , Baader 13mm Hyperion, Explore Scientific 70° 10mm, 15mm, 20mm, Meade 8.8mm UWA
Software: N.I.N.A., SharpCapPro, PixInsight, PhotoShop CC, Phd2, Stellarium
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Re: Processing Challenge 30 - A Bubble and a Cluster

#3

Post by STEVE333 »


Hi David - Any idea what the Mure DeNoise Gain and Gaussian noise parameters are for this data?

Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
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Re: Processing Challenge 30 - A Bubble and a Cluster

#4

Post by AstroBee »


Steve,

What data do you need? It's my data.
I've never used MureDenoise so I don't know what you are looking for.
Greg M.~ "Ad Astra per Aspera"
Scopes: Celestron EdgeHD14", Explore Scientific ED152CF & ED127 APO's, StellarVue SV70T, Classic Orange-Tube C-8, Lunt 80mm Ha double-stack solar scope.
Mounts: Astro-Physics Mach One, iOptron CEM70EC Mount, iOptron ZEQ25 Mount.
Cameras: ZWO ASI2600mm Pro, ZWO 2600MC Pro, ZWO ASI1600mm
Filters: 36mm Chroma LRGB & 3nm Ha, OIII, SII, L-Pro, L-eXtreme
Eyepieces: 27mm TeleVue Panoptic, 4mm TeleVue Radian, Explore Scientific 82° 30mm, 6.7mm , Baader 13mm Hyperion, Explore Scientific 70° 10mm, 15mm, 20mm, Meade 8.8mm UWA
Software: N.I.N.A., SharpCapPro, PixInsight, PhotoShop CC, Phd2, Stellarium
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Re: Processing Challenge 30 - A Bubble and a Cluster

#5

Post by Jockinireland »


STEVE333 wrote: Mon Feb 28, 2022 5:41 am Hi David - Any idea what the Mure DeNoise Gain and Gaussian noise parameters are for this data?

Steve
Sorry Steve, I've never used those so have no idea what is required. Hopefully @AstroBee will be able to provide.
Scope: Skywatcher Evostar 80ED (SW 0.85 FR/FF) on a SW NEQ6Pro
Guiding; SW Evoguide 50ED, ASI 120mm mini
Meade 8" LX200 GPS on wedge (Guided with a cheapo 50mm guidescope and a ZWO ASI 120mm mini)
Sharpstar 61EDPH II (with dedicated 0.8 reducer) with wiliam Optics 32mm uniguide
Camera: ASI2600MC pro. QHY 163M with ZWO 7nm NB filters, Canon EOS700D astro mod
Secondary mount: Skywatcher StarAdventurer

My Astrobin https://www.astrobin.com/users/mackiedlm/
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Re: Processing Challenge 30 - A Bubble and a Cluster

#6

Post by STEVE333 »


AstroBee wrote: Mon Feb 28, 2022 6:00 am Steve,

What data do you need? It's my data.
I've never used MureDenoise so I don't know what you are looking for.
Hi AB - All I need to know is what camera you used (1600 or 2600) and what gain you used for the S, H and O images. I can get the Read Noise from the sensor data sheets.

Thanks for any info you can provide.

Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
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Re: Processing Challenge 30 - A Bubble and a Cluster

#7

Post by AstroBee »


STEVE333 wrote: Wed Mar 02, 2022 7:50 pm
AstroBee wrote: Mon Feb 28, 2022 6:00 am Steve,

What data do you need? It's my data.
I've never used MureDenoise so I don't know what you are looking for.
Hi AB - All I need to know is what camera you used (1600 or 2600) and what gain you used for the S, H and O images. I can get the Read Noise from the sensor data sheets.

Thanks for any info you can provide.

Steve
Steve,
Shot with my 1600mm, Gain was the factory default of 139 and offset 21. This was back before I even knew how to tweak those settings.
Greg M.~ "Ad Astra per Aspera"
Scopes: Celestron EdgeHD14", Explore Scientific ED152CF & ED127 APO's, StellarVue SV70T, Classic Orange-Tube C-8, Lunt 80mm Ha double-stack solar scope.
Mounts: Astro-Physics Mach One, iOptron CEM70EC Mount, iOptron ZEQ25 Mount.
Cameras: ZWO ASI2600mm Pro, ZWO 2600MC Pro, ZWO ASI1600mm
Filters: 36mm Chroma LRGB & 3nm Ha, OIII, SII, L-Pro, L-eXtreme
Eyepieces: 27mm TeleVue Panoptic, 4mm TeleVue Radian, Explore Scientific 82° 30mm, 6.7mm , Baader 13mm Hyperion, Explore Scientific 70° 10mm, 15mm, 20mm, Meade 8.8mm UWA
Software: N.I.N.A., SharpCapPro, PixInsight, PhotoShop CC, Phd2, Stellarium
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Re: Processing Challenge 30 - A Bubble and a Cluster

#8

Post by STEVE333 »


AstroBee wrote: Wed Mar 02, 2022 7:52 pm
STEVE333 wrote: Wed Mar 02, 2022 7:50 pm
AstroBee wrote: Mon Feb 28, 2022 6:00 am Steve,

What data do you need? It's my data.
I've never used MureDenoise so I don't know what you are looking for.
Hi AB - All I need to know is what camera you used (1600 or 2600) and what gain you used for the S, H and O images. I can get the Read Noise from the sensor data sheets.

Thanks for any info you can provide.

Steve
Steve,
Shot with my 1600mm, Gain was the factory default of 139 and offset 21. This was back before I even knew how to tweak those settings.
Thanks AB - I know what you mean about using the default Gain and Offset settings! I didn't touch mine for some time.

Was any preprocessing (ABE? or DBE?) done on these images? The reason I ask is because I have had good success using Mure DeNoise, but, it doesn't work on these images for some reason.

Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
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Re: Processing Challenge 30 - A Bubble and a Cluster

#9

Post by AstroBee »


I honestly don't remember Steve. It's been a while so I'm guessing the answer is NO because they were probably edited with AstroPixelProcessor default settings.
Greg M.~ "Ad Astra per Aspera"
Scopes: Celestron EdgeHD14", Explore Scientific ED152CF & ED127 APO's, StellarVue SV70T, Classic Orange-Tube C-8, Lunt 80mm Ha double-stack solar scope.
Mounts: Astro-Physics Mach One, iOptron CEM70EC Mount, iOptron ZEQ25 Mount.
Cameras: ZWO ASI2600mm Pro, ZWO 2600MC Pro, ZWO ASI1600mm
Filters: 36mm Chroma LRGB & 3nm Ha, OIII, SII, L-Pro, L-eXtreme
Eyepieces: 27mm TeleVue Panoptic, 4mm TeleVue Radian, Explore Scientific 82° 30mm, 6.7mm , Baader 13mm Hyperion, Explore Scientific 70° 10mm, 15mm, 20mm, Meade 8.8mm UWA
Software: N.I.N.A., SharpCapPro, PixInsight, PhotoShop CC, Phd2, Stellarium
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Re: Processing Challenge 30 - A Bubble and a Cluster

#10

Post by STEVE333 »


I understand! Memory is not my strong suit anymore!

I was able to do noise reduction using other approaches, so, no problem. I'll be posting my SHO version IF I can remember the processing steps to include them in the post!

Thanks for the responses.

Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
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Re: Processing Challenge 30 - A Bubble and a Cluster

#11

Post by STEVE333 »


Thanks AstroBee for providing this nice data. My SHO version processed with PixInsight.

Bubble_w_Stars.jpg

PROCESING STEPS:
Cropped the images.
Linear noise reduction for all channels using MLT.
ABE
Stretched S, H and O images with HistogramTransformation.
For each of the images a clone was created and then applied inverted to protect the bright areas. Reduced noise using TGVDenoise.
Created starless S, H, O images using Starnet2 (also simultaneously created stars images).
Used RangeSelection to create masks for Oiii and Sii images to select the nebulosity. Stretched Oiii and Sii images with masks in place to boost nebulosity to approximately same level as Ha image.
Created SHO image using ChannelCombination.
Increased color saturation using CurvesTransformation.
Used Convolution to slightly blur SHO image to reduce noise.

Sharpened Ha image using MultiscaleLinearTransform.
Increased contrast of Ha image with two applications of LocalHistogramEqualization (Kernel radii of 26 & 110).
Used sharpened Ha image as Luminance for LRGBCombination with only L selected. Applied to blurred SHO image.
Used HistogramTransformation to adjust R,G and B black levels to align histogram peaks and achieve a black background.


Created an HOO image with the stars images.
Used PixelMath to add the stars image to the SHO_LRGB image.


Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
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Re: Processing Challenge 30 - A Bubble and a Cluster

#12

Post by AstroBee »


Holy Cow Steve! That's a lot of work but the end result sure does pay off. Fantastic work! There's so much more data there than I ever believed there was. It's amazing how you coaxed it out of my data. Congrats!
Greg M.~ "Ad Astra per Aspera"
Scopes: Celestron EdgeHD14", Explore Scientific ED152CF & ED127 APO's, StellarVue SV70T, Classic Orange-Tube C-8, Lunt 80mm Ha double-stack solar scope.
Mounts: Astro-Physics Mach One, iOptron CEM70EC Mount, iOptron ZEQ25 Mount.
Cameras: ZWO ASI2600mm Pro, ZWO 2600MC Pro, ZWO ASI1600mm
Filters: 36mm Chroma LRGB & 3nm Ha, OIII, SII, L-Pro, L-eXtreme
Eyepieces: 27mm TeleVue Panoptic, 4mm TeleVue Radian, Explore Scientific 82° 30mm, 6.7mm , Baader 13mm Hyperion, Explore Scientific 70° 10mm, 15mm, 20mm, Meade 8.8mm UWA
Software: N.I.N.A., SharpCapPro, PixInsight, PhotoShop CC, Phd2, Stellarium
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Re: Processing Challenge 30 - A Bubble and a Cluster

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Post by STEVE333 »


AstroBee wrote: Thu Mar 03, 2022 3:04 am Holy Cow Steve! That's a lot of work but the end result sure does pay off. Fantastic work! There's so much more data there than I ever believed there was. It's amazing how you coaxed it out of my data. Congrats!
Thanks AB - I have a set of process icons that leads me through this process each time, so, I don't have to think about it or remember it. I don't use every process each time, but, occasionally I do. The hard part was coming up with the set of process icons. Following them is easy!

Thanks for sharing the data with us.

Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
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Re: Processing Challenge 30 - A Bubble and a Cluster

#14

Post by Sky »


That's exceptional data, Astrobee ... thanks for sharing.

I did a simple and quick workflow in Photoshop using the Hubble palette.

- Opened the Ha, OIII and SII images into Photoshop
- Stretched (Curves) all three images until fine detail was getting "blown out"
- The SII image had a noisy background that was reduced using "noise reduction" from the free NIK Collection
- Tone Mapping (NIK Collection) was used to bring out faint details while preserving the bright areas.
- Background brightness was equalized across the three images using Levels set at 35.
- The 3 images were combined using a preset "Action" of the Hubble palette.
- Minor sharpening and color adjustments.

EDIT: Replaced original posted image with a new one processed with HLVG to remove green tint ... Thanks Steve
Bubble_Hubble_TSS.jpg
It's interesting to note the nebulosity at the top right is part of the "Lobster Claw Nebula" (LBN 540) and the nebulosity at the top left is part of LBN 547.
Bubble_Nebula_DSS.jpg
Last edited by Sky on Sun Mar 06, 2022 12:17 am, edited 3 times in total.
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Re: Processing Challenge 30 - A Bubble and a Cluster

#15

Post by STEVE333 »


Nice processing Sky. Have you tried applying HLVG (a Photoshop plugin) to your finished image? It will remove the Green and leave golds and browns. Not better, just another option.

Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
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Re: Processing Challenge 30 - A Bubble and a Cluster

#16

Post by Sky »


STEVE333 wrote: Sat Mar 05, 2022 5:05 pm Nice processing Sky. Have you tried applying HLVG (a Photoshop plugin) to your finished image? It will remove the Green and leave golds and browns. Not better, just another option.

Steve
Thanks for your HLVG suggestion. I'm partial red/green color blind and using HLVG is SOP for me. It slipped my mind on this one. Another problem with this image ... the stars are a bit "blocky." I don't know where or how this happened as I didn't use any star reduction techniques.
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Re: Processing Challenge 30 - A Bubble and a Cluster

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Post by STEVE333 »


Sky wrote: Sat Mar 05, 2022 7:32 pm
STEVE333 wrote: Sat Mar 05, 2022 5:05 pm Nice processing Sky. Have you tried applying HLVG (a Photoshop plugin) to your finished image? It will remove the Green and leave golds and browns. Not better, just another option.

Steve
Thanks for your HLVG suggestion. I'm partial red/green color blind and using HLVG is SOP for me. It slipped my mind on this one. Another problem with this image ... the stars are a bit "blocky." I don't know where or how this happened as I didn't use any star reduction techniques.

I sometimes see stars like that in my NB images. In my case it is usually caused by the stars in one (or sometimes two) of the NB channels being larger than the stars in the other channel(s). Performing star reduction on the offending channel(s) to make the stars match better to the other channel(s) before combining them into the SHO image often solves the problem. Maybe it would help?

Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
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Re: Processing Challenge 30 - A Bubble and a Cluster

#18

Post by Jockinireland »


I'm a bit late with this one - busy with my own data for a change.

I tried a few things with this but struggled a bit with the LRGB. I ended up going back to my comfort sone of HOO and ended with this:
Comb1_s75.jpg
Done in PI, I ;

combined the RGB and extracted the stars with starnet2 the stretched with HT
On the HSO;
crop, EZ Dnoise,
stretch with HT
combined using SHOAIP
did some further noise reduction and contrast enhancement (LHE on the HA and combined it with the HOO as aLum LRGBCombine.
EZ Star reduction
Scope: Skywatcher Evostar 80ED (SW 0.85 FR/FF) on a SW NEQ6Pro
Guiding; SW Evoguide 50ED, ASI 120mm mini
Meade 8" LX200 GPS on wedge (Guided with a cheapo 50mm guidescope and a ZWO ASI 120mm mini)
Sharpstar 61EDPH II (with dedicated 0.8 reducer) with wiliam Optics 32mm uniguide
Camera: ASI2600MC pro. QHY 163M with ZWO 7nm NB filters, Canon EOS700D astro mod
Secondary mount: Skywatcher StarAdventurer

My Astrobin https://www.astrobin.com/users/mackiedlm/
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Re: Processing Challenge 30 - A Bubble and a Cluster

#19

Post by Rasalgethi »


Hi, I had a try with this using PixInsight on the LRGB files.
LRGB combination, ABE, crop, background neutralisation, stretch.
EZ denoise, EZ star reduction, curves for contrast and saturation.
There was a star with a dark edge that I tried to clone out above the bubble.
Bubble_RGBL_ABE_EZ.jpg
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Re: Processing Challenge 30 - A Bubble and a Cluster

#20

Post by Jockinireland »


Rasalgethi wrote: Thu Apr 14, 2022 1:19 am Hi, I had a try with this using PixInsight on the LRGB files.
LRGB combination, ABE, crop, background neutralisation, stretch.
EZ denoise, EZ star reduction, curves for contrast and saturation.
There was a star with a dark edge that I tried to clone out above the bubble.

Image
Thats a nice result on the LRGB data - well done.
Scope: Skywatcher Evostar 80ED (SW 0.85 FR/FF) on a SW NEQ6Pro
Guiding; SW Evoguide 50ED, ASI 120mm mini
Meade 8" LX200 GPS on wedge (Guided with a cheapo 50mm guidescope and a ZWO ASI 120mm mini)
Sharpstar 61EDPH II (with dedicated 0.8 reducer) with wiliam Optics 32mm uniguide
Camera: ASI2600MC pro. QHY 163M with ZWO 7nm NB filters, Canon EOS700D astro mod
Secondary mount: Skywatcher StarAdventurer

My Astrobin https://www.astrobin.com/users/mackiedlm/
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