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Single frame and stacked comparison requested

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#1 PGW Steve

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Posted 26 October 2012 - 02:21 PM

I have to say that there are some incredible pics of Jupiter on here lately.
I was wondering if people could post some of their stacked, processed pics, along with a representative single pic from the stack. Sort of a before and after to give me a bit better idea of what to accept for a sub frame.

Thanks in advance!

#2 zAmbonii

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Posted 26 October 2012 - 04:21 PM

Here ya go.

This was from the end of last month...I haven't been out since because of bad weather :(. I have a C8, and I was imaging with a 3x barlow and my SPC900NC webcam (at f/30).
Seeing was pretty good at the time, at least 4/5.

I ran an .avi through autostakkert2 and at the top left is what AS2! said the best frame was. On the top right is a stack of 1000 frames (out of 3500). Bottom left is with wavelets from Registax6 + an RGB align. Bottom right is with additional deconvolution + an autocolor correction.

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#3 kowspot2000

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Posted 26 October 2012 - 04:37 PM

What did you do (what software/method) did you take to deconvolute the image? The step from wavelets to deconv is amazing!

#4 zAmbonii

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Posted 26 October 2012 - 05:30 PM

What did you do (what software/method) did you take to deconvolute the image? The step from wavelets to deconv is amazing!


I use the Astra Image Photoshop plugin.

For my images (probably because I am using a one shot color) webcam, there is a limit to how hard you can go with wavelet sharpening in registax. Just hard to get the fine details with wavelets. I tend to do a softer sharpening with registax and then the deconvolution steps help bring out the finer details. It does bring out some noise, but I can put up with some extra noise if I can get some finer details.

#5 Great Attractor

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Posted 26 October 2012 - 06:28 PM

I was wondering if people could post some of their stacked, processed pics, along with a representative single pic from the stack.


I'd say that if seeing is below excellent, a fragment of actual raw video is a better demonstration than any single frame. With just that in mind I have uploaded a few of mine, here's the latest (and the best so far) Jupiter:

http://vimeo.com/52038388

Stacked (AviStack 2, wavelets and histogram in Registax 6):

Posted Image

#6 cheapersleeper

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Posted 26 October 2012 - 07:00 PM

zAmbonii you are driving me nuts!! What an amazing sequence from start to finish. I would let you borrow my cat in trade for you making a thread detailing your processing.

Regards,
Brad

#7 PGW Steve

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Posted 26 October 2012 - 07:43 PM

Thank you guys so much, the pics, and especially the video shows me what raw data looks like, scary indeed! The skill is in the processing, most obviously. I won't be discouraged with my blurry videos, I will soldier on with learning how to massage them into something presentable.

#8 zAmbonii

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Posted 26 October 2012 - 08:16 PM

Never get discouraged.

The most important part of imaging (to me at least) is the seeing. You can't control that -- unless you have a good seeing machine and I am sure that you would be able to make a fortune! Everything else is secondary. A good scope and a good camera can make the best out of the seeing, but if you have poor seeing your images are going to be subpar.

It took me a long time, and a lot of imaging sessions to realize that. But once you have a night of good seeing you quickly realize that the subpar results didn't have anything to do with what you did right or wrong, you just weren't going to get a good image because of the conditions.

Brad: My workflow isn't really anything special....and can be replicated by anyone with the same tools :). I have figured out some settings that work good and I usually use similar settings for each imaging session. I think I will start another thread to show what I did. I'll also have an .avi download so ppl can try themselves, and have some screenshots showing my settings in AS2!, R6, and Photoshop to show how I got the image I did.

#9 cheapersleeper

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Posted 26 October 2012 - 10:28 PM

Brad: My workflow isn't really anything special....and can be replicated by anyone with the same tools :). I have figured out some settings that work good and I usually use similar settings for each imaging session. I think I will start another thread to show what I did. I'll also have an .avi download so ppl can try themselves, and have some screenshots showing my settings in AS2!, R6, and Photoshop to show how I got the image I did.


Indeed, I do also start with Autostakkert2 and then Registax6. I am trying to avoid spending money on Photoshop and have tried GIMP but noticed that it was converting my images to 8 bit.

What FPS are you using on the Phillips webcam? I read that there is data compression and artifacts at the higher fps so I dropped down to using 5 and 10fps but I think my faster fps avi. files look better. Kind of confusing.

Brad

#10 Great Attractor

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Posted 27 October 2012 - 06:28 AM

Please excuse the off-top; cheapersleeper, GIMP is going to support 16-bit images in an official build soon, but for now you can try the free and multiplatform RawTherapee (histogram, curves, levels, denoising, sharpening, color opers etc.).






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