Astrophotography Processing Challenge April 2024
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Re: Astrophotography Processing Challenge April 2024
Scopes: WO: RedCat 51, ZS 73, ZS103, SW: 200P Solar: Altair Herschel wedge, Daystar Scout 60SSDS Mounts: SW: HEQ5Pro Rowan & EQM35Pro. Guiders: All using ZWO ASI120MM minis. Cameras: ZWO: ASI294MM-Pro, ASI 183MC-Pro, ASI 183MM Pro, ASI 174MM Filters: IDAS, Altair, Baader, Antlia, ZWO. Observatory: The Jousting Tent - ROR. Acquisition: NINA on Windows 11 - EKOS/INDI/Kstars on Raspberry PI4 (retired for now) Image Processing: PixInsight, APP, Photoshop 24.1.0 Location: West Manchester Light Pollution: Mucho Bortle 7/8
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Re: Astrophotography Processing Challenge April 2024
Now this month is a head scratcher if you are a newbie to this. I downloaded the tif file and it unzipped to 6 images?
What am I supposed to do with them now? I have hit a brick wall.
Any suggestions?
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Re: Astrophotography Processing Challenge April 2024
Processed entirely in PixInsight
- All data run through gradient correction
BlurXTerminator
NoiseXTerminator
HistogramTransformation on all 6 data
RGB Data combined
Extracted stars
Run imagesolver
SpecPhotoColCal with ChromaRGB filters chosen in calibration for correcting colours of stars as per GAIA3
- S2 Extract stars
Ha Extract stars
O3 Extract stars
- LRGB Combined as
Ha SHO
Bill Blanshan and Mike Cranfield NarrowBand Normalization run as SHO for ColorCalibration process
Convert toRGB Working Space
Run Curves with some saturation,RGB /K low and mids. Boost high slightly
Local histogram transform 25 kernel radius
Local histogram transform 75 kernel radius
Run ImproveBrilliance script from Juergen Terpe Toolbox
Set colorprofile to sRGB IEC61966-2.1
- Run Astro_Swell star_de-emphasizer script
Add labels
Export as PNG
Scopes: WO: RedCat 51, ZS 73, ZS103, SW: 200P Solar: Altair Herschel wedge, Daystar Scout 60SSDS Mounts: SW: HEQ5Pro Rowan & EQM35Pro. Guiders: All using ZWO ASI120MM minis. Cameras: ZWO: ASI294MM-Pro, ASI 183MC-Pro, ASI 183MM Pro, ASI 174MM Filters: IDAS, Altair, Baader, Antlia, ZWO. Observatory: The Jousting Tent - ROR. Acquisition: NINA on Windows 11 - EKOS/INDI/Kstars on Raspberry PI4 (retired for now) Image Processing: PixInsight, APP, Photoshop 24.1.0 Location: West Manchester Light Pollution: Mucho Bortle 7/8
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Re: Astrophotography Processing Challenge April 2024
That's excellent Terry! Really well controlled dynamic range and really good colours.
Could you explain your PixelMath formula and have you got a link for the Juergen Terpe Toolbox please?
Kind of makes me want to have another go!
Graeme
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Re: Astrophotography Processing Challenge April 2024
KingClinton wrote: ↑Sun Apr 07, 2024 5:03 pm Last month I managed to download a single image and it went into my old copy of startools and PS. I kinda got something to show up but nowhere near your guys efforts!
Now this month is a head scratcher if you are a newbie to this. I downloaded the tif file and it unzipped to 6 images?
What am I supposed to do with them now? I have hit a brick wall.
Any suggestions?
The six files are narrow band filtered images of Red, Green, Blue, Sulfur ii, Oxygen iii and Hydrogen α. The captured frames have already been stacked but are unstretched, or linear. I don't know much about
The
I hope the video helps and I look forward to seeing your work.
Have fun!
Graeme
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Re: Astrophotography Processing Challenge April 2024
Thanks Graeme. I used to just use a formula containing %T+stars under theGraeme1858 wrote: ↑Tue Apr 09, 2024 7:13 am
That's excellent Terry! Really well controlled dynamic range and really good colours.
Could you explain your PixelMath formula and have you got a link for the Juergen Terpe Toolbox please?
Kind of makes me want to have another go!
Graeme
Now I use the formula below that I got from a post on the PixInsight Forum from Russell Croman https://pixinsight.com/forum/index.php? ... ges.18602/
In it he mentions this is the same as recombining the unscreened stars image and starless image in Photoshop using "screen" blending option. The
So the formula is this: again drag and drop onto the starless image and it will create a new one containing the stars and the starless. It gives slightly different results to my original and is more pleasing to the eye.
Juergens repo is at https://www.ideviceapps.de/PixInsight/Utilities/
There are lots of excellent utilities in it and it appears in PixInsight under Script>Toolbox
One thing I forgot to mention in my processing workflow was I noticed that there is a very bright region in the Fish Head that looks blown out. It isn't and detail can be teased out of it by using the HDRMT process set as this. I normally use the HDRMT process to run over galaxy cores but felt this image needed it too. In the case of the Fish Head I run it just before the "Bill Blanshan and Mike Cranfield NarrowBand Normalization run as SHO for ColorCalibration" process.
The picture looks great as a full size image but it is much too big to upload as the png is about 170MB in size. I had to really cut down the saved file size to upload to the forum but it is always the case with our forums to manage storage space. Of course the smaller size looses a lot of detail but is more than good enough for showing in a web browsers.
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Re: Astrophotography Processing Challenge April 2024
The Forum has a 5Mb limit so clicking on an image displays it in more detail. But the best way for high quality images is to right click and open in a new tab, then hit F11.
Graeme
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Re: Astrophotography Processing Challenge April 2024
Graeme1858 wrote: ↑Tue Apr 09, 2024 7:32 amKingClinton wrote: ↑Sun Apr 07, 2024 5:03 pm Last month I managed to download a single image and it went into my old copy of startools and PS. I kinda got something to show up but nowhere near your guys efforts!
Now this month is a head scratcher if you are a newbie to this. I downloaded the tif file and it unzipped to 6 images?
What am I supposed to do with them now? I have hit a brick wall.
Any suggestions?
The six files are narrow band filtered images of Red, Green, Blue, Sulfur ii, Oxygen iii and Hydrogen α. The captured frames have already been stacked but are unstretched, or linear. I don't know much aboutStartools . Perhaps aStartools user can advise here. PS6 combines by opening each file (RGB ) each on a different layer. Or at least that's how I used to do it inGimp ! Here's a good explanation:
TheRGB or the SHO files can be used as a three filter set to produce an image if you don't have a lot of experience (like me!) or you can use the SHO files to produce a starless image and theRGB files for the stars as Terry has done above.
I hope the video helps and I look forward to seeing your work.
Have fun!
Graeme
Thanks Graeme.
I appreciate your feedback. Sounds and looks rather complicated for a visual brain like mine.
Think I might sit this one out. I will stick to trying the single images when we get them.
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Re: Astrophotography Processing Challenge April 2024
Graeme
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Re: Astrophotography Processing Challenge April 2024
I am a photoshop user, but can't say I have ever done this combination myself. I am just about to attempt a process. I would imagine I will try different combinations.KingClinton wrote: ↑Sun Apr 07, 2024 5:03 pm
Last month I managed to download a single image and it went into my old copy of startools and PS. I kinda got something to show up but nowhere near your guys efforts!
Now this month is a head scratcher if you are a newbie to this. I downloaded the tif file and it unzipped to 6 images?
What am I supposed to do with them now? I have hit a brick wall.
Any suggestions?
The six files are narrow band filtered images of Red, Green, Blue, Sulfur ii, Oxygen iii and Hydrogen α. The captured frames have already been stacked but are unstretched, or linear. I don't know much about Startools. Perhaps a Startools user can advise here. PS6 combines by opening each file (RGB) each on a different layer. Or at least that's how I used to do it in Gimp! Here's a good explanation:
Firstly there is no Luminance. So I would suggest the following.
SHO and simply use the
I see some-one else has beaten me to it.
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Re: Astrophotography Processing Challenge April 2024
Whacking Great files. Took ages to download and ages to do SX on them. In fact still doing it.......... be back some time this month with the result Lol.
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Re: Astrophotography Processing Challenge April 2024
Processed entirely in Photoshop.
I have processed this in just SHO (Hubble Palette) as the stars are so small I doubt
Mostly levels and curves, I used StarExterminator which I have only just acquired as my old PC wasn't capable of running it. Some High Pass filter and selective colour.
Link to larger size on Astrobin (in my staging area)
https://www.astrobin.com/full/9vp5rd/0/
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Re: Astrophotography Processing Challenge April 2024
Graeme
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Re: Astrophotography Processing Challenge April 2024
I like the way you processed the core here. Really clean.carastro wrote: ↑Tue Apr 09, 2024 7:11 pm Had to reduce this to about a quarter of the original size otherwise could not upload it to Astrobin in order to post here.
Processed entirely in Photoshop.
I have processed this in just SHO (Hubble Palette) as the stars are so small I doubt RGB stars will add anything, but would have taken a lot more time to process.
Mostly levels and curves, I used StarExterminator which I have only just acquired as my old PC wasn't capable of running it. Some High Pass filter and selective colour.
Link to larger size on Astrobin (in my staging area)
https://www.astrobin.com/full/9vp5rd/0/
ZOJgH-NZ0--x_2560x0_esdlMP5Y.png
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Re: Astrophotography Processing Challenge April 2024
@carastro For some reason, your image is showing up sort of stretched width-wise, like the aspect ratio got tweaked a bit. Is it happening just on my screen or does anybody else notice this?
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Re: Astrophotography Processing Challenge April 2024
Yes it is stretched on my screen too but if you click on my Astrobin link it will show it properly. I wonder why that has happened, I simply linked to Astrobin using the insert image icon?@carastro For some reason, your image is showing up sort of stretched width-wise, like the aspect ratio got tweaked a bit. Is it happening just on my screen or does anybody else notice this?
Carole
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Re: Astrophotography Processing Challenge April 2024
A little additional curves and local histogram enhance before adding the
Scopes: WO: RedCat 51, ZS 73, ZS103, SW: 200P Solar: Altair Herschel wedge, Daystar Scout 60SSDS Mounts: SW: HEQ5Pro Rowan & EQM35Pro. Guiders: All using ZWO ASI120MM minis. Cameras: ZWO: ASI294MM-Pro, ASI 183MC-Pro, ASI 183MM Pro, ASI 174MM Filters: IDAS, Altair, Baader, Antlia, ZWO. Observatory: The Jousting Tent - ROR. Acquisition: NINA on Windows 11 - EKOS/INDI/Kstars on Raspberry PI4 (retired for now) Image Processing: PixInsight, APP, Photoshop 24.1.0 Location: West Manchester Light Pollution: Mucho Bortle 7/8
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Re: Astrophotography Processing Challenge April 2024
Of course it's ok Terry! You can post as many goes as you like. Glad you're enjoying it.
I like this one. It's darker and moodier than your last post. I like how you have brought out the reds.
Is FPU already in
Graeme
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- TerryMcK
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Re: Astrophotography Processing Challenge April 2024
It is very easy to use and some data works better than others.
Scopes: WO: RedCat 51, ZS 73, ZS103, SW: 200P Solar: Altair Herschel wedge, Daystar Scout 60SSDS Mounts: SW: HEQ5Pro Rowan & EQM35Pro. Guiders: All using ZWO ASI120MM minis. Cameras: ZWO: ASI294MM-Pro, ASI 183MC-Pro, ASI 183MM Pro, ASI 174MM Filters: IDAS, Altair, Baader, Antlia, ZWO. Observatory: The Jousting Tent - ROR. Acquisition: NINA on Windows 11 - EKOS/INDI/Kstars on Raspberry PI4 (retired for now) Image Processing: PixInsight, APP, Photoshop 24.1.0 Location: West Manchester Light Pollution: Mucho Bortle 7/8
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Re: Astrophotography Processing Challenge April 2024
Graeme
Celestron 9.25 f10 SCT, f6.3FR, CGX. Sky-Watcher Evostar-120, HEQ5
ASI1600MM Pro, ASI294MC Pro, ASI224MC
ZWO EFW, ZWO OAG, ASI220MM Mini.
APM 11x70 ED APO Binoculars.
https://www.averywayobservatory.co.uk/
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