Search found 645 matches

by GreatAttractor
Sat Jun 27, 2020 7:58 am
Forum: This is SolarChat !!
Topic: Lunt 40mm Dedicated Hydrogen-Alpha Solar Telescope
Replies: 26
Views: 301

Re: Lunt 40mm Dedicated Hydrogen-Alpha Solar Telescope

Amazing. I absolutely loved my Lunt 35 — and 6 years ago it was ~$700!
by GreatAttractor
Sun Jun 21, 2020 8:11 pm
Forum: Solar Reference Library
Topic: Solar Animation Tutorial (June 2020)
Replies: 10
Views: 203

Re: Solar Animation Tutorial (June 2020)

I haven't seen this one before, but yes, it looks like the cubic interpolation shader isn't executing exactly how it should on your setup. I'm guessing the saved processed images look the same though for both back ends? Could you send me the stack and ImPPG settings file so I can check on my system?
by GreatAttractor
Sun Jun 21, 2020 9:30 am
Forum: Solar Reference Library
Topic: Solar Animation Tutorial (June 2020)
Replies: 10
Views: 203

Re: Solar Animation Tutorial (June 2020)

Great tutorial, Stu! As for coloring the whole animation in GIMP, I've read there are scripts to automate it (i.e apply Curves/other operations to all layers), but haven't got around to trying it. I noticed you have "CPU + bitmaps" mode enabled in your ImPPG screenshot. Do you get an error message o...
by GreatAttractor
Tue Jun 09, 2020 7:45 pm
Forum: This is SolarChat !!
Topic: Max recommended duration of video capture to freeze small scale details?
Replies: 9
Views: 150

Re: Max recommended duration of video capture to freeze small scale details?

For my captures using the 90 mm telescope (effective f = 1056 mm, image scale 0.73"/pix) I settled on 15-second videos (depending on the ROI size, 450-680 frames). For time lapses, I take 15-second videos with 30-second breaks. On the disc my setup requires 0.7-1.3 ms shutter, for fainter prominence...
by GreatAttractor
Thu Jun 04, 2020 7:01 am
Forum: This is SolarChat !!
Topic: My first h-alpha animation
Replies: 18
Views: 220

Re: My first h-alpha animation

Well done!
I suggest shorter time intervals next time (30 s - 1 minute) for smoother motion.
by GreatAttractor
Mon Jun 01, 2020 1:34 pm
Forum: This is SolarChat !!
Topic: Solar Granulation 31st May '20
Replies: 18
Views: 227

Re: Solar Granulation 31st May '20

Excellent details. I read somewhere that the life span of a convection cell is around 20 minutes. Would it be interesting to make a time lapse ? Of course! Strongly recommended. Things start to get interesting from ~127 mm of aperture. https://astrob.in/23205/0/rawthumb/gallery/get.jpg?insecure htt...
by GreatAttractor
Sat May 30, 2020 5:16 pm
Forum: This is SolarChat !!
Topic: Lunt 35THa ASI178MM Focus issues
Replies: 8
Views: 130

Re: Lunt 35THa ASI178MM Focus issues

Hello, Alan, and welcome. I was doing something similar to your first approach (different camera though). Could you double check you can't reach focus even with the diagonal moved all the way out (or even a bit further, held in hand)?
by GreatAttractor
Mon May 25, 2020 9:32 pm
Forum: This is SolarChat !!
Topic: Monday Sun-day Fun Day... 25th May '20
Replies: 19
Views: 234

Re: Monday Sun-day Fun Day... 25th May '20

I love the images, but especially the animation is wonderful! As for the orientation, you can open everything in GIMP using File/Open as Layers..., and then use Image/Transform (will rotate every layer). You can also crop, scale, preview animation using Filters/Animation/Playback..., and finally exp...
by GreatAttractor
Sat May 23, 2020 7:52 am
Forum: This is SolarChat !!
Topic: Active region on May 22
Replies: 11
Views: 216

Re: Active region on May 22

That's a great result and an interesting setup! I loved my former SW Mak 180 for white light work, but didn't see an easy way to use it for Hα. I may revisit it in the future (perhaps a Quark Combo?).

Do you perhaps have some images made with only the Mak + TV2x + LS50F?
by GreatAttractor
Fri May 22, 2020 8:32 pm
Forum: This is SolarChat !!
Topic: Hello Solarchat
Replies: 21
Views: 304

Re: Hello Solarchat

Welcome to the forum. Be warned, you'll probably stay here for years to come!
by GreatAttractor
Fri May 22, 2020 6:43 am
Forum: This is SolarChat !!
Topic: 21May - C11 HA/CAK Close-ups - Images added 23 May 20
Replies: 33
Views: 650

Re: 21May - C11 HA/CAK Close-ups

Alfred,
I may be doing something wrong, but when trying to download, I'm getting 8-bit JPG images.
by GreatAttractor
Sat May 16, 2020 8:02 am
Forum: This is SolarChat !!
Topic: anti-COVID-19 Ca II K image with C11 + ARIES DERF for YOUR processing
Replies: 13
Views: 453

Re: anti-COVID-19 Ca II K image with C11 + ARIES DERF for YOUR processing

yltansg wrote:
Thu May 14, 2020 10:13 am
Unfortunately you did not attached the XML file used in your processing.
(Already resolved, that was Alfred's local problem with opening the file.)
by GreatAttractor
Tue May 12, 2020 7:28 pm
Forum: This is SolarChat !!
Topic: anti-COVID-19 Ca II K image with C11 + ARIES DERF for YOUR processing
Replies: 13
Views: 453

Re: anti-COVID-19 Ca II K image with C11 + ARIES DERF for YOUR processing

Great image, Valery, thank you.

My approach (ImPPG settings file is attached):
v_cak.png
v_cak.png (886.1 KiB) Viewed 334 times
by GreatAttractor
Mon May 11, 2020 7:43 pm
Forum: Solar Software
Topic: Processed images cannot be resized
Replies: 3
Views: 335

Re: Processed images cannot be resized

This sounds like a file permissions problem. If I had to guess, for some reason ImPPG is now launched in a compatibility (with an older Windows version) mode, runs with administrator permissions, and whatever files it saves are changeable by administrators - but not regular users. Can you delete tho...
by GreatAttractor
Tue Apr 14, 2020 9:36 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Protuberance approach vs. Coronograph
Replies: 19
Views: 6278

Re: Protuberance approach vs. Coronograph

Since the surface brightness of the sun disk is 106 times greater than that of the corona Ha, I've just noticed this. Better to clarify, lest some reader thinks "so what's the big deal with imaging it" ;) Looks like the forum currently doesn't support "superscript" BBcode tag, but one can use the U...
by GreatAttractor
Thu Feb 13, 2020 7:55 pm
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 12174

Re: New version of ImPPG: faster processing on the GPU

A small bugfix update – version 0.6.1 – is available at https://github.com/GreatAttractor/imppg/releases Bug fixes: Invalid batch processing results in OpenGL mode Enhancements: Tone curve window position reset command For the rare situations where window positioning does not work correctly, you can...
by GreatAttractor
Wed Jan 29, 2020 7:43 pm
Forum: Solar Scope Modifications
Topic: Newtonian vs SCT thermal handling with full aperture D-ERF
Replies: 25
Views: 8240

Re: Newtonian vs SCT thermal handling with full aperture D-ERF

One could think that perhaps SCT reflects/absorbs much more IR than the Newtonian, but the only difference would be the thin glass corrector... seems strange. This, however: The heat coming out of the focuser is also significantly higher than my SCT, even with a 2nd DERF there, it's hotter on my han...
by GreatAttractor
Sat Jan 11, 2020 10:09 pm
Forum: This is SolarChat !!
Topic: Visual Solar Observing
Replies: 17
Views: 5222

Re: Visual Solar Observing

I observe quite rarely, but here's my advice: once you max out with the 'scope (& double-stacking options), I strongly recommend getting a binoviewer. I have a Baader Maxbright with 2x 15 mm Plössls (just regular ones) and the views with the 50 mm and 90 mm H-alpha setups are wonderful. I also had j...
by GreatAttractor
Wed Jan 08, 2020 5:31 pm
Forum: This is SolarChat !!
Topic: Gong showing new feature
Replies: 7
Views: 2898

Re: Gong showing new feature

I use helioviewer.org, which shows the current SDO images among others.
by GreatAttractor
Thu Dec 26, 2019 10:59 am
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 12174

Re: New version of ImPPG: faster processing on the GPU

To those who downloaded the Ubuntu package: I've uploaded a corrected one, which also installs an ImPPG application shortcut (so it can be selected in "application launcher" of your desktop environment). The same goes for building under any Linux (or alike) system. Pull the latest source code, and t...
by GreatAttractor
Wed Dec 25, 2019 10:22 pm
Forum: Solar Software
Topic: ImPPG version 0.6.0
Replies: 9
Views: 2090

Re: ImPPG version 0.6.0

I'd miss out the wavelets and go straight to ImPPG for sharpening Indeed! It will work best with raw, unprocessed stacks. Though one could do the primary sharpening elsewhere (e.g. wavelets in Registax) and then just touch up in ImPPG (probably with L-R disabled, just apply unsharp mask and modify ...
by GreatAttractor
Wed Dec 25, 2019 8:22 pm
Forum: Solar Software
Topic: ImPPG version 0.6.0
Replies: 9
Views: 2090

Re: ImPPG version 0.6.0

Hi Rainer,

That's right, ImPPG is for post-processing of stacks. So you must stack your AVI first (e.g. in AutoStakkert), and then you can open the resulting TIFF in ImPPG. On the home page you'll find links to a few tutorials:

http://greatattractor.github.io/imppg/
by GreatAttractor
Wed Dec 25, 2019 12:41 pm
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 12174

Re: New version of ImPPG: faster processing on the GPU

GPU mode will be activated by default when you first start ImPPG 0.6.0. The current mode is indicated in the status bar in the lower right:
imppg_back_end_info.png
imppg_back_end_info.png (96.9 KiB) Viewed 11982 times
You can switch between CPU/GPU modes in the menu:
back_end_selection.png
back_end_selection.png (36.8 KiB) Viewed 11982 times
by GreatAttractor
Wed Dec 25, 2019 1:05 am
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 12174

Re: New version of ImPPG: faster processing on the GPU

Wow, great to hear this! Thanks for checking. I must get me one of those high-end babies one day... ;)
by GreatAttractor
Tue Dec 24, 2019 12:28 pm
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 12174

Re: New version of ImPPG: faster processing on the GPU

Hmm, by the looks of it, it's not "too strong", rather the processing went completely bonkers :) Standard OpenGL has no provisions to choose the active GPU (though there are AMD- and NVidia-specific extensions, as I've now googled), it's up to the operating system/driver configuration. I wouldn't th...