Search found 637 matches

by GreatAttractor
Sat May 23, 2020 7:52 am
Forum: This is SolarChat !!
Topic: Active region on May 22
Replies: 11
Views: 126

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: 208

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: 481

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: 349

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: 349

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 230 times
by GreatAttractor
Mon May 11, 2020 7:43 pm
Forum: Solar Software
Topic: Processed images cannot be resized
Replies: 3
Views: 232

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: 6147

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: 11985

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: 8083

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: 5134

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: 2854

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: 11985

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: 2028

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: 2028

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: 11985

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 11793 times
You can switch between CPU/GPU modes in the menu:
back_end_selection.png
back_end_selection.png (36.8 KiB) Viewed 11793 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: 11985

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: 11985

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...
by GreatAttractor
Mon Dec 23, 2019 11:44 pm
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 11985

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

Thanks for feedback, Marty. When you switch to CPU mode, does everything look OK? Also, in GPU mode please try with View/Scaling method/Linear. And check if a saved output image also looks bad. I tested on 3 different GPUs (Intel, NVidia, AMD), each under Linux and Windows, but yeah, there might be ...
by GreatAttractor
Mon Dec 23, 2019 10:43 pm
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 11985

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

Hard to compare GPU-CPU performance, I'd need many data points. As for a desirable GPU, even my ancient Intel HD Graphics 5500 (integrated) benefits here; generally, the more powerful, the better. I'm wondering if the current highest-end GPUs could apply L-R in real-time for, say, a 1 Mpix image (if...
by GreatAttractor
Mon Dec 23, 2019 9:53 pm
Forum: Solar Software
Topic: New version of ImPPG: faster processing on the GPU
Replies: 24
Views: 11985

New version of ImPPG: faster processing on the GPU

ImPPG version 0.6.0 has been released . After some architectural cleanup, I added a GPU/OpenGL back end, that is, almost all processing (except image alignment) is now performed on the GPU. In practical terms, on most computers it means: processing is faster by a factor of several or more for quite ...
by GreatAttractor
Mon Dec 23, 2019 9:52 pm
Forum: Solar Software
Topic: ImPPG version 0.6.0
Replies: 9
Views: 2028

ImPPG version 0.6.0

ImPPG version 0.6.0 is available at: https://github.com/GreatAttractor/imppg/releases New features: GPU (OpenGL) back end for much faster processing Enhancements: View scrolling by dragging with the right mouse button (previously: with the middle button) Zooming in/out with the mouse wheel (previous...
by GreatAttractor
Wed Dec 18, 2019 3:45 pm
Forum: This is SolarChat !!
Topic: Full Disk 2019-12-17
Replies: 14
Views: 2023

Re: Full Disk 2019-12-17

Good job, Jochen! To tease the max resolution out of these 50 mm, I suggest you make a 2x2 mosaic. I have similar pixel pitch (3.75 µm) to yours, and such mosaics work very well for me with a 2x Barlow's lens element screwed directly into camera's nosepiece (giving ~1.6x), e.g.: https://astrob.in/22...
by GreatAttractor
Tue Dec 17, 2019 8:23 am
Forum: Solar Software
Topic: Processing Solar Proms Autostakkert 3 vs Registax 6
Replies: 9
Views: 1903

Re: Processing Solar Proms Autostakkert 3 vs Registax 6

And I still use AviStack 2 (for those cases where Stackistry fails). Seems OK on prominences too.
by GreatAttractor
Sat Dec 14, 2019 9:38 pm
Forum: Solar Scope Modifications
Topic: D-ERF in converging beam?
Replies: 26
Views: 4627

Re: D-ERF in converging beam?

Then how do we calculate the rise in temperature along the converging beam of our OTA? There's certainly some of that, but probably less important than one would think. The air (over the kind of distances we have in telescopes) is after all quite transparent to solar radiation. Consider this: Lunt ...
by GreatAttractor
Sat Dec 14, 2019 10:36 am
Forum: Solar Scope Modifications
Topic: D-ERF in converging beam?
Replies: 26
Views: 4627

Re: D-ERF in converging beam?

Here's the mistake: 1 m² = 100 cm × 100 cm = 10 000 cm². Assuming irradiance of 1000 W/m² (0.1 W/cm²), a 15 cm-diameter objective gathers only π × 7.5² cm² × 0.1 W ≈ 17.7 W.

(Or in other words: if the unfocused irradiance is 1000 W/m², you can't have a mere 15-cm lens gather > 3 kW ;)).