Luke Posted October 15, 2014 Share Posted October 15, 2014 We solar folks seem to be having a bit of an Astra Image 4 frenzy, trying out its deconvolution routines A big thanks to Brian (Smerral) saying about using 250 (!) iterations.Here is my first effort based on that, with a Quark and Tele Vue 60 shot. I hope you can see the subtle difference, you might need browser at 100% zoom. For me though the difference is small, the Astra Image one I am happy with, the Photoshop Smart Sharpen is not quite there for me so I might usually downsize it a bit and add a second lighter dose of sharpening. Link to comment Share on other sites More sharing options...
michael.h.f.wilkinson Posted October 15, 2014 Share Posted October 15, 2014 Subtle differences in favour of LR-deconvolution, I would say. Link to comment Share on other sites More sharing options...
DrRobin Posted October 15, 2014 Share Posted October 15, 2014 Luke, that is a very small difference, but I agree, the Lucy Richardson just has the advantage. I know we have all gone deconvolution mad, but I couldn't believe how much better my solar images are shaping up using LR processing.Robin Link to comment Share on other sites More sharing options...
Luke Posted October 15, 2014 Author Share Posted October 15, 2014 Luke, that is a very small difference, but I agree, the Lucy Richardson just has the advantage. I know we have all gone deconvolution mad, but I couldn't believe how much better my solar images are shaping up using LR processing.RobinThat's great news, Robin!I think I might be able to sharpen the LR one a touch more, but what struck me is that I would be happy to leave it at 100% size. Most of my Quark images so far have been downsized and a shot with the 60mm I had been processing I was thinking I might need to downsize as well. I don't mind downsizing the 120mm shots as there is quite a lot of detail anyway, but I'd like to keep my 60mm shots at 100% if poss. Link to comment Share on other sites More sharing options...
Montana Posted October 16, 2014 Share Posted October 16, 2014 That is interesting you did it through twice. I was getting no difference between 250 or 500 iterations when I tried it. I wonder what 2x 250 would have done.Alexandra Link to comment Share on other sites More sharing options...
michael.h.f.wilkinson Posted October 16, 2014 Share Posted October 16, 2014 That is interesting you did it through twice. I was getting no difference between 250 or 500 iterations when I tried it. I wonder what 2x 250 would have done.AlexandraThat was two deconvolutions with different parameters of the blur (PSF width, I assume), which should differ from 500 iterations with a single PSF. Haven't tried that yet. Link to comment Share on other sites More sharing options...
smerral Posted October 16, 2014 Share Posted October 16, 2014 That looks good. It's a matter of experiment and will vary for each scope/reducer combo. Link to comment Share on other sites More sharing options...
Luke Posted October 16, 2014 Author Share Posted October 16, 2014 Alexandra, as Michael says, I used a different Blur Kernel Size. I didn't intend to do two passes, it was just that after the first blast, the noise seemed pretty low so it looked like it could take another dose :-o But I am happy to have a starting point where I can hopefully edge Smart Sharpen! I'm not expecting a big difference, and ditto your images, because I think Smart Sharpen does a pretty good job especially considering the speed, I thnk we pay a cost in a bit more noise. I wonder if it is a flavour of Wiener? Link to comment Share on other sites More sharing options...
steppenwolf Posted October 16, 2014 Share Posted October 16, 2014 The LR version is the better of the two - subtle but that's how 'sharpening' should be. I have only used it with DS objects and it requires tweaking for each one so it is very interesting to see it in use on the Sun. Link to comment Share on other sites More sharing options...
Pete Presland Posted October 16, 2014 Share Posted October 16, 2014 very nicely detailed image. the processing looks just about right to my eyes. Link to comment Share on other sites More sharing options...
Montana Posted October 16, 2014 Share Posted October 16, 2014 OK OK OK I'm hooked, it does nothing for Halpha for me but for Calcium K woohoo!!! I've never been able to use Smart sharpen for this and been using wavelets, using Astra Image 4 in CaK is like using Smart sharpen for Halpha.Alexandra Link to comment Share on other sites More sharing options...
Luke Posted October 16, 2014 Author Share Posted October 16, 2014 We want pics! We want pics! And settings! Link to comment Share on other sites More sharing options...
michael.h.f.wilkinson Posted October 16, 2014 Share Posted October 16, 2014 Very curious indeed. I gather CaK tends to be noisier, so LR might be more stable than Smart Sharpen, giving better results whenever the photon count is a bit lower (as with my little LS35 compared to Alexandra's heavy artillery ). That might explain why several people report better results with LR, in others it is a draw, and for some PS wins. Link to comment Share on other sites More sharing options...
Montana Posted October 16, 2014 Share Posted October 16, 2014 OK, the hubby is getting cross as I won't go to bed.Here are some mega close ups, the LR was Gaussian, from the top 200, 2.2, 1Name is in titleNight nightAlexandra Link to comment Share on other sites More sharing options...
michael.h.f.wilkinson Posted October 16, 2014 Share Posted October 16, 2014 Very interesting comparison. LR wins quite clearly, SS second, wavelets a distant third. Link to comment Share on other sites More sharing options...
Luke Posted October 16, 2014 Author Share Posted October 16, 2014 Very nice, Alexandra, a bit less subtle in difference than my h-a effort, LR far less noise Link to comment Share on other sites More sharing options...
DrRobin Posted October 16, 2014 Share Posted October 16, 2014 Hey what happened here, I only went out to the cinema and all of a sudden Astro Image mania has swept the nation. LR wins it for me on your super close up Alexandra.Robin Link to comment Share on other sites More sharing options...
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