Search found 433 matches

by decay
Fri Feb 09, 2024 3:19 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

Hi Ivo & Martin, really, that’s far too kind :oops: . Of course, ST is greatly designed to be used without nuts and bolts, bits and bytes and even without too many graphs, diagrams or whatever. But AP really isn’t a simple subject and I think diving a bit deeper can help to get a better understandin...
by decay
Wed Feb 07, 2024 6:24 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

For me, it was interesting to see, what happens to the square wave: 2024-02-07 19_14_24-Window.jpg The sharp edges contain a great amount of high frequencies (as explained in a post above) and these components get amplified, even if the base freqency is very low. Playing around with different settin...
by decay
Wed Feb 07, 2024 6:09 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

Interesting to see what happens when you turn off protection (yes, it clips! :D )
2024-02-07 19_02_47-Window.jpg
2024-02-07 19_02_47-Window.jpg (54.29 KiB) Viewed 799 times
Or what happenes levering the Dark/Light Enhace slider:
2024-02-07 19_06_51-Window.jpg
2024-02-07 19_06_51-Window.jpg (51.37 KiB) Viewed 799 times
2024-02-07 19_08_21-Window.jpg
2024-02-07 19_08_21-Window.jpg (49.03 KiB) Viewed 799 times
(to be continued)
by decay
Wed Feb 07, 2024 5:51 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

I created a folder and moved the new version of the tool into it: https://c.web.de/@334960167135216273/RxV2hsc1QoqHkgEbEa4R7w In addition, there are the two synthetic images mentioned above: sine-sweep.tif square-sweep.tif The brightness levels of the waves shown are between 25 % and 75 %. The new v...
by decay
Wed Feb 07, 2024 11:14 am
Forum: Gallery
Topic: IC 2944 Running Chicken Nebula in SHO
Replies: 3
Views: 730

Re: IC 2944 Running Chicken Nebula in SHO

Nice, well done, Martin! :) I like the not cropped version a little more, because of image composition and the neat contrasts, I think. After looking at some broadband images of this object I understand that Ha is much stronger than OII and SII. It mainly seems to be a H-II region. And of course hav...
by decay
Mon Feb 05, 2024 5:52 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

But wouldn't the low frequency outside of the largest range chosen be..."6"? Oh yes, your're right Mike. Ivo mentioned both, frequencies too low and too high. (For me, I'm not sure, if 'too high' is possible in our case?!) I generated two synthetic images, one with square waves and the other one wi...
by decay
Mon Feb 05, 2024 5:25 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

Dietmar I finally downloaded, unquarantined, and played with the brightness app. Thanks for trying, Mike :) Gimp's built-in UM indeed worked as expected based on the reading we did, though it seemed slanted towards a deeper darkening than brightening. I found out exactly the same! I screenshot each...
by decay
Mon Feb 05, 2024 4:03 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

So, in terms of your tool, it would be helpful to calculate the average brightness for the entire cross-section and subtract that average from what is displayed. Copy that. ;) 2024-02-05 16_55_19-Window.jpg 2024-02-05 16_54_56-Window.jpg Hey, that's exactly what the AC/DC input coupling switch of a...
by decay
Mon Feb 05, 2024 1:09 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

Hi Ivo, thank you much for your detailed and extensive explanations. Keep in mind there is always the "scale 0" residual(s) the boundaries beyond which the scales do not operate This is exactly the point I overlooked. A graphic equalizer covers the whole audible frequency spectrum whereas ST Sharp m...
by decay
Sat Feb 03, 2024 1:11 pm
Forum: General Discussion
Topic: Astro to Astro-art Continuum, 2024 Edition
Replies: 45
Views: 6908

Re: Astro to Astro-art Continuum, 2024 Edition

Hi Mike, we should have taken a look at Guy's User Notes beforehand: https://forum.startools.org/viewtopic.php?f=12&t=1777 Much of what we discussed is explained there in excellent detail ... :roll: And be sure to check out the mentioned link: http://keithwiley.com/astroPhotography/imageSharpening.s...