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Old 11-04-2008, 07:56 AM
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10th April Jupiter, exponential/guassian

Hi all,

here is the same avi processed, the first image I used expontial in the Lucy Richardson, deconvolution and the second I used guassian.

I was surprised at the difference.
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Old 11-04-2008, 08:39 AM
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iceman (Mike)
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That's very nice, Lester! The left one is definitely sharper!

That data is just sublime.. beautiful image.
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Old 11-04-2008, 12:31 PM
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Thanks for your comments Mike.
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Old 11-04-2008, 01:05 PM
bird (Anthony Wesley)
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Hey Lester, have you tried Maximum Entropy deconvolution? That's what I'm using these days...

cheers, Bird
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Old 11-04-2008, 03:17 PM
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Hi Anthony,

I have used it in the past and usually it adds too much grain to my images. Where as Lucy Richardson brings out the detail and keeps the image relatively smooth.

I will give this last image a go on M.E and see what I get.

Thanks for the info.
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Old 11-04-2008, 05:22 PM
bird (Anthony Wesley)
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The trick with ME is setting the radius large enough so it doesn't pick up on the noise....

I find ME is the least noisy of the three options, with VC the worst.

cheers, Bird
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Old 11-04-2008, 06:36 PM
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Hmm! I have got a lot to learn, thanks for the tip Anthony.

I appreciate it.
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Old 11-04-2008, 07:13 PM
bird (Anthony Wesley)
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At a guess, without seeing your data, try radius 1.5 and 6 turns in ME and see what happens. I start around there and if the image looks too blurry then I lower the radius and try again. If the radius gets too small then it will start to amplify noise and you have to go larger or reduce the number of turns.

Because ME includes some lowpass filtering as part of the algorithm you don't want to go fewer than about 5 turns or you'll lose more in the filtering than you gain in the deconvolution part.

The radius will depend on the colour as well - I normally find red is smaller radius than green, which is smaller than blue - this follows the resolution in each channel with red generally having the best resolution as it's least effected by air.

When you find the right spot for your data then you can try changing the number of turns to optimise that, on really good data I can end up with something like 10 or 12 turns, but on not-so-good data it doesn't normally go past 5 or 6.

This all depends on the amount of noise in the image, which in turn depends on how many frames you stacked and how much noise was in the original frames...

cheers, Bird
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Old 11-04-2008, 10:11 PM
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Thats going to be a huge help for me.

Thanks Anthony.
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Old 11-04-2008, 10:40 PM
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I had to try the new recipe.

The first image is the Lucy richardson exponential deconvolution

The second is M.E. gaussian with 1.5 curve width and 12 iterations, (I may have gone too far) but the fine detail it pulled out is amazing.
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  #11  
Old 11-04-2008, 11:02 PM
bird (Anthony Wesley)
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That double-ring effect around the edge usually means the deconvolution radius is too large (or the number of iterations is too large).

I forgot to say that the results you get in AI are directly influenced by the wavelet settings you use in registax in the earlier stage... if the image has too much wavelet sharpening then you won't be able to do much more with deconvolution. It's a tricky balancing act, sometimes I go back to registax and change wavelet settings, then load that into AI and see how it goes with deconvolution, then back to registax for another try etc.

cheers, Bird
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Old 11-04-2008, 11:07 PM
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Thanks again Anthony, very likely in my excitement, I added too much in the waveletts. I will redo that in the near future.

Here is the same image, but with less blue.
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  #13  
Old 11-04-2008, 11:25 PM
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Congrats Lester impressive image
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  #14  
Old 11-04-2008, 11:27 PM
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Here is my last for tonight.

M.E. 0.9 and 10 and L.R. 0.8 and 2.0
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  #15  
Old 12-04-2008, 03:27 AM
bird (Anthony Wesley)
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That's lookin pretty good!

Bird
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  #16  
Old 12-04-2008, 03:32 AM
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Awesome imaging Lester,

planetary imaging seems to just get better and better on this group.

regards,CS
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  #17  
Old 12-04-2008, 06:48 AM
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Thanks Beren, Rob and Anthony.

Now how long before I get another one of these; hope its not 2 years.
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  #18  
Old 12-04-2008, 09:03 AM
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great thread and I love the image Lester.
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  #19  
Old 12-04-2008, 02:26 PM
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Thanks David.

I just took the avi and had lots of help.
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  #20  
Old 26-04-2008, 09:03 AM
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Still been tweeking this avi and here's my best up to now.
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