Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
- Juno16
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Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
I just read about the new Pixinsight GHS script on Astrobin and gave it a try.
I originally installed V1 and it was not something that I could get very far with not knowing much about it. I saw today that there is a version 2 released that has a very nice preview window.
For anyone interested, the repository is here: https://www.ghsastro.co.uk/updates/
Just giving it a few minutes without watching the Youtube video's, I found it to be quite powerful. There is quite a bit yet that I don't yet understand.
I only worked with the Stretch Factor slider and the Local Stretch Intensity slider. The Stretch Factor is self explanatory. The Local Stretch Intensity slider seems to have quite an impact on taming galaxy cores. There are several types of stretches that can be applied.
Quite impressive and I've yet to learn much about its use or features.
Just curious if anyone else has tried it and what are your impressions?
I originally installed V1 and it was not something that I could get very far with not knowing much about it. I saw today that there is a version 2 released that has a very nice preview window.
For anyone interested, the repository is here: https://www.ghsastro.co.uk/updates/
Just giving it a few minutes without watching the Youtube video's, I found it to be quite powerful. There is quite a bit yet that I don't yet understand.
I only worked with the Stretch Factor slider and the Local Stretch Intensity slider. The Stretch Factor is self explanatory. The Local Stretch Intensity slider seems to have quite an impact on taming galaxy cores. There are several types of stretches that can be applied.
Quite impressive and I've yet to learn much about its use or features.
Just curious if anyone else has tried it and what are your impressions?
Jim
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
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Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
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Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
Haven't tried it yet, but it is in my plan to do so. Still struggling with trying to get a decent image of IC417 with only Ha and Sii.
The link to the repository returns a 403 Forbidden!
The link to the repository returns a 403 Forbidden!
Scopes Celestron EdgeHD-11; William Optics GT102; William Optics ZS61; Criterion Dynamax-8 SCT
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Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
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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Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
Possibly the link that I posted worked since I had v1 already installed.STEVE333 wrote: ↑Wed Mar 09, 2022 6:27 am I found the the link below will work.
https://ghsastro.co.uk/
Steve
Jim
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
- XCalRocketMan
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
Thanks Steve - I should have tried moving up the hierarchy of the URLSTEVE333 wrote: ↑Wed Mar 09, 2022 6:27 am I found the the link below will work.
https://ghsastro.co.uk/
Steve
Scopes Celestron EdgeHD-11; William Optics GT102; William Optics ZS61; Criterion Dynamax-8 SCT
Mounts AP1100GTO mount w/APCCpro; iOptron iEQ30 Pro; Criterion Dynamax-8 SCT
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Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
Misc Moonlite focuser on Edge - Feather-Touch focuser on GT102; ZWO EAF on ZS61; ZWO 2" and 31mm FWs; Kendrick Dew System, Temp-est Fans
Software NINA; PHD; APT; BYE; PI; APP; PSP; Registax; FireCapture; SharpCap
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Mounts AP1100GTO mount w/APCCpro; iOptron iEQ30 Pro; Criterion Dynamax-8 SCT
Lenses Hyperstar-III; Celestron 0.7x FR; WO Flat/Reducer 0.8x
Guiding Celestron OAG w/ASI174mm mini; WO 50mm; Orion ST80
Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
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Software NINA; PHD; APT; BYE; PI; APP; PSP; Registax; FireCapture; SharpCap
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
I'm going through the Dave Payne tutorial(s) now. Looks quite interesting. It will take a bit of learning, but, the ability to bring out the background while not blowing out the highlights may well be worth the effort.
Watch this space...
Steve
Watch this space...
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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Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
I checked out several of the tutorials and then gave it a try on some of my data. I like the concept, but, found it somewhat difficult to use. By difficult I don't mean that the interface was difficult, it was just difficult to get it to produce better results than what I get using normal techniques. Of course anything new is going to take some learning. However, it wasn't producing better results for me than what I got using other stretches (HT or ExponentialTransformation or a combination of both) so I didn't find a good reason to keep pursuing it. I've only tried it on nebula targets. Just my opinion. I look forward to others opinions.
Steve
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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Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
One further point. When stretching with GHS there are 5 sliders that can be adjusted. With HistogramTransformation there are really only 2 sliders that are adjusted (the middle and left hand sliders). Even after watching the tutorials I found it difficult to know where to position some of the sliders on the first stretch. It became even more unclear when it came to the second (or third) stretch. Maybe it's just because I'm 80, but, I wasn't able to get a handle on it. Hopefully someone else has better success.
Steve
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
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: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
I've been trying it out on my latest image (IC417) but found it doesn't really produce anything different than my other tools can provide. I'll experiment more with it as I find time as it does provide some additional flexibility over HT and others.
Scopes Celestron EdgeHD-11; William Optics GT102; William Optics ZS61; Criterion Dynamax-8 SCT
Mounts AP1100GTO mount w/APCCpro; iOptron iEQ30 Pro; Criterion Dynamax-8 SCT
Lenses Hyperstar-III; Celestron 0.7x FR; WO Flat/Reducer 0.8x
Guiding Celestron OAG w/ASI174mm mini; WO 50mm; Orion ST80
Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
Misc Moonlite focuser on Edge - Feather-Touch focuser on GT102; ZWO EAF on ZS61; ZWO 2" and 31mm FWs; Kendrick Dew System, Temp-est Fans
Software NINA; PHD; APT; BYE; PI; APP; PSP; Registax; FireCapture; SharpCap
Blog at: SkyAndRockets
Mounts AP1100GTO mount w/APCCpro; iOptron iEQ30 Pro; Criterion Dynamax-8 SCT
Lenses Hyperstar-III; Celestron 0.7x FR; WO Flat/Reducer 0.8x
Guiding Celestron OAG w/ASI174mm mini; WO 50mm; Orion ST80
Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
Misc Moonlite focuser on Edge - Feather-Touch focuser on GT102; ZWO EAF on ZS61; ZWO 2" and 31mm FWs; Kendrick Dew System, Temp-est Fans
Software NINA; PHD; APT; BYE; PI; APP; PSP; Registax; FireCapture; SharpCap
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
I missed this post first time around. After fiddling with this for a while it's really beginning to grow on me. I can't see it replacing tools like Masked Stretch, but I've found especially for stretching my RGB layer I can get nice colors without the artifacts that I pick up with ArcSin stretch. What I've found to be critical is how you set the symmetry stretch point. This can produce very different results depending on where you put it (left or right of the histogram). I've been working on galaxy wide fields, so will have to give it a try on some nebulas.
Scopes: Esprit 100, 12.5" Telekit Dob
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Camera: 294 MC Pro, 224 mc, 2600mm
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Mounts: EQ6R-Pro, EQ Platform.
Filters: Optolong L-Pro & L-Enhance, Chroma 36mm LRGB, 5nm HA, 3nm OIII, 3nm SII.
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
I'm still not convinced it's any better than fiddling with HT. But I'm willing to give it another go when I get a chance.starfield wrote: ↑Mon Apr 11, 2022 1:15 am I missed this post first time around. After fiddling with this for a while it's really beginning to grow on me. I can't see it replacing tools like Masked Stretch, but I've found especially for stretching my RGB layer I can get nice colors without the artifacts that I pick up with ArcSin stretch. What I've found to be critical is how you set the symmetry stretch point. This can produce very different results depending on where you put it (left or right of the histogram). I've been working on galaxy wide fields, so will have to give it a try on some nebulas.
Scopes Celestron EdgeHD-11; William Optics GT102; William Optics ZS61; Criterion Dynamax-8 SCT
Mounts AP1100GTO mount w/APCCpro; iOptron iEQ30 Pro; Criterion Dynamax-8 SCT
Lenses Hyperstar-III; Celestron 0.7x FR; WO Flat/Reducer 0.8x
Guiding Celestron OAG w/ASI174mm mini; WO 50mm; Orion ST80
Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
Misc Moonlite focuser on Edge - Feather-Touch focuser on GT102; ZWO EAF on ZS61; ZWO 2" and 31mm FWs; Kendrick Dew System, Temp-est Fans
Software NINA; PHD; APT; BYE; PI; APP; PSP; Registax; FireCapture; SharpCap
Blog at: SkyAndRockets
Mounts AP1100GTO mount w/APCCpro; iOptron iEQ30 Pro; Criterion Dynamax-8 SCT
Lenses Hyperstar-III; Celestron 0.7x FR; WO Flat/Reducer 0.8x
Guiding Celestron OAG w/ASI174mm mini; WO 50mm; Orion ST80
Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
Misc Moonlite focuser on Edge - Feather-Touch focuser on GT102; ZWO EAF on ZS61; ZWO 2" and 31mm FWs; Kendrick Dew System, Temp-est Fans
Software NINA; PHD; APT; BYE; PI; APP; PSP; Registax; FireCapture; SharpCap
Blog at: SkyAndRockets
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Re: Has Anyone Tried the New Pixinsight GeneralisedHyperbolicStretch Script?
Hi all.
I've been using GHS V2 for a couple of weeks now and I have to say I love it.
I'm currently working on some Orion data and using the script ive managed to pull out so much more surrounding nebula and dust which has been impossible for me to do using any other process so for me anyway, GHS V2 is priceless.
Carl
I've been using GHS V2 for a couple of weeks now and I have to say I love it.
I'm currently working on some Orion data and using the script ive managed to pull out so much more surrounding nebula and dust which has been impossible for me to do using any other process so for me anyway, GHS V2 is priceless.
Carl
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