Imaging from home (T300 Solar newton, K-Line

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allhoest
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Imaging from home (T300 Solar newton, K-Line

Post by allhoest »

I was quite happy about the picture taken from 3000 altitude (St Véran, French Alps) last year and this year.
I wanted to try the same setup in my area, in the "heights" of Belgium, at about 600m altitude.

Here, the best result after selecting and some tweaking + image size reduction:
Image




The full resolution is here.
Image





Because of the extensive treatment (Deconvolution + denoising) I needed to apply, I'm afraid I will travel once more to the French Alps for imaging.



CS
Alex
2020-09-14
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Re: Imaging from home (T300 Solar newton, K-Line

Post by DeepSolar64 »

Very nice. What scope? What aperture ? 300mm?


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Re: Imaging from home (T300 Solar newton, K-Line

Post by ffellah »

These are stunning images, Alex

Franco :bow


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Re: Imaging from home (T300 Solar newton, K-Line

Post by Bruce G »

Very nice granulation in your images. Well done!

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Re: Imaging from home (T300 Solar newton, K-Line

Post by eroel »

Alex:
Superb images.
Incredible resolution.
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Re: Imaging from home (T300 Solar newton, K-Line

Post by rsfoto »

Hi,

WOW, just WOW to see the rice grain in such a magnification ...


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Re: Imaging from home (T300 Solar newton, K-Line

Post by DeepSolar64 »

I love granulation images. The individual granules are so small they test the scope and seeing. To get them like this says a lot positive for both. And to the skills of the imager as well!

Getting them like this visually is not easy either. Contrast is pretty low and a filter, like a 540nm green filter seems to help me. But I have never seen them near this well. An imager can increase contrast like no filter can and I am limited by aperture. I don't have anything outfitted for solar beyond 102mm.


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Re: Imaging from home (T300 Solar newton, K-Line

Post by marktownley »

Very impressive indeed!


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Re: Imaging from home (T300 Solar newton, K-Line

Post by EGRAY_OBSERVATORY »

Excellent granulation imagery Alex.

Thanks vm
Terry


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Re: Imaging from home (T300 Solar newton, K-Line

Post by LTHB »

Wonderful granulation images with lots of detail!

Would you mind to elaborate on your remark about deconvolution and denoising? Which software did you use for that, in particular for denoising?

I'm asking because captured a couple of granulation videos last week, and my processing attempts were not successful so far. Sharpening with imppg I keep getting a granulation pattern spoiled by lots of dots and wrinkles that look like sharpened noise. Using Registax I can reduce the noise, but the images come out too soft, so I'd appreciate hints how to denoise granulation images!

Kind regards,

Frank


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Re: Imaging from home (T300 Solar newton, K-Line

Post by marktownley »

LTHB wrote: Sun Sep 27, 2020 2:07 pm Sharpening with imppg I keep getting a granulation pattern spoiled by lots of dots and wrinkles that look like sharpened noise.
I get this if I use LR in ImPPG, I use USM (for CaK) in ImPPG now and don't get it...


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Re: Imaging from home (T300 Solar newton, K-Line

Post by MapleRidge »

Absolutely marvellous image Alex...well done :bow

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Re: Imaging from home (T300 Solar newton, K-Line

Post by Montana »

Absolutely fabulous :bow :bow :bow it is wonderful to see the K grains too :hamster:

I use NeatImage for denoise and love it, I couldn't live without it now.

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Re: Imaging from home (T300 Solar newton, K-Line

Post by Martin_S »

marktownley wrote: Sun Sep 27, 2020 2:18 pm
LTHB wrote: Sun Sep 27, 2020 2:07 pm Sharpening with imppg I keep getting a granulation pattern spoiled by lots of dots and wrinkles that look like sharpened noise.
I get this if I use LR in ImPPG, I use USM (for CaK) in ImPPG now and don't get it...
I just tried this method Mark, the results are really good.

Martin


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Re: Imaging from home (T300 Solar newton, K-Line

Post by allhoest »

Sorry, I was off yesterday.
Thank you for the nice comments.

The scope is indeed a 300mm aperture.

I was using Neatimage in the past to denoise, the free version however.
The free version supports only 8bit.
So I decide to denoise under Pix Insight. It allows various denoising possibilities.
I used ACDNR (Adaptive Contrast-Driven Noise Reduction).

For the deconvolution also, I used Pix Insight.
I tested various functions, but I can't remember which one I kept. Probably a deconvolution with Van Cittert function.

CS
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Re: Imaging from home (T300 Solar newton, K-Line

Post by Martin_S »

could you post a raw unprocessed image Alex? . Your finished results are impressive.

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Re: Imaging from home (T300 Solar newton, K-Line

Post by LTHB »

Thanks, Alex! That's enough information to start! I haven't used PI for solar images yet, but I'll definitely try that.

Together with Alexandra's and Mark's suggestions I have now a variety of possible ways of getting rid of the noise to try out, and next week I will hopefully have a bit of time for that!

Regards,

Frank


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