10th April Jupiter, exponential/guassian

[Lester]

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.

[iceman]

That's very nice, Lester! The left one is definitely sharper!

That data is just sublime.. beautiful image.

[Lester]

Thanks for your comments Mike.

[bird]

Hey Lester, have you tried Maximum Entropy deconvolution? That's what I'm using these days...

cheers, Bird

[Lester]

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.

[bird]

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

[Lester]

Hmm! I have got a lot to learn, thanks for the tip Anthony.

I appreciate it.

[bird]

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

[Lester]

Thats going to be a huge help for me.

Thanks Anthony.

[Lester]

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.

[bird]

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

[Lester]

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.

[beren]

:thumbsup:Congrats Lester impressive image

[Lester]

Here is my last for tonight.

M.E. 0.9 and 10 and L.R. 0.8 and 2.0

[bird]

That's lookin pretty good!

Bird

[CoombellKid]

Awesome imaging Lester,

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

regards,CS

[Lester]

Thanks Beren, Rob and Anthony.

Now how long before I get another one of these; hope its not 2 years.

[davidpretorius]

great thread and I love the image Lester.

[Lester]

Thanks David.

I just took the avi and had lots of help.

[Lester]

Still been tweeking this avi and here's my best up to now.

[iceman]

When the data is that good, it's always worth re-visiting, Lester.

In this case though I think there's a tad too much contrast - the dark blues look a bit unnatural.

Keep at it, look forward to more.

[Lester]

Thanks Mike,

Yes I will come back to it a number of times and may have gone too far in some of the processing.

I find the best for me is to leave it for a week and come back and see if I still like it or not.

I don't know where the blue is comming from, but have come across it in other images I have taken.

This is still a work in porgress.

[Robert_T]

Very impressive Lester.:thumbsup: You've inspired me to drag the ol' scope and DMK out from under their dusty wraps and give this planetary imaging caper another crack!

cheers,

Rob

[Lester]

Thanks Rob,

Surely up in Brisbane you are getting just as teezing conditions as us in S.A., so yes by all means have a go.

I have noticed some low jetstream conditions for your area lately, so all the best.

[Lester]

Yet another, with less contrast and reduced saturation to cut back on the blue.