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After many hours of fiddling round with Registax wavelet settings to process my own solar system images, I've always been curious as to how it actually works. In doing so I've put together my own image sharpening program which does something similar to Registax wavelets. For comparison, I've also added some general purpose deconvolution techniques which you'll probably be familiar with from other image processing software (like Wiener inverse filtering, Richardson-Lucy, etc). In choosing a point spread function to deconvolve with, one suprising result was that the typical stack outputs from Autostakkert work best with a Lorentz point spread function (with a minor modification). Deconvolving with a Gaussian point spread function doesn't really work. Deep-sky images seem to deconvolve best with a Moffat point spread function (which is to be expected - it's already well established that star profiles in long exposures are best approximated with a Moffat function).
On the whole, it's unlikely that you can sharpen solar system images much more in this program than you already can in Registax. You can see results from Registax wavelet (sharpening layers), inverse filtering (e.g. Wiener), and iterative deconvolution (e.g. Landweber) below. They all give very similar results. In all the techniques there's a similar trade-off between less noise but less detail vs more noise but more detail.
There are some quick start notes on the first page of the Readme here:
There are some examples of deconvolved images here (move mouse over image to see before/after):
Image credits are on the hyperlinks
The Windows download is here:
Example solar system tifs to experiment with are here:
And the project page is here (with Source code in the src folder)
If anyone finds it useful, do post here how it compares to other tools you use for solar system image sharpening.
The download and the source code are free, you can use it unrestricted for any purpose. The OpenCV and OpenCVCSharp components which my program use have licence information at the end of the Readme.pdf.
By Mark 2020
Help please. Last night I purchased an old celestron c8 sct, 2000mm fl, f10 on a fork mount. The mount has no power cable so is pretty useless, but i brought it to defork the ota for planetary imaging and hopefully some small faint dso's. It was a reasonable price. Ive got a heq5 pro mount that i will be mounting it onto. The guy said it needs collimation. I know i need to mount it on a vixen dovetail but the bolt holes dont line up anywhere. Its as if someone has rotated the corrector plate housing around 120 degrees. Would it make a huge difference if i removed the housing screws and put it back so that the bolts line up, keeping the mirror and plate in the same spot on the housing bracket, or would i have to try put everything back separately in different positions and collimate everything from scratch. The picture at the minute doesn't quite get crisp so whatever has been done needs rectifying. Can this even be done by us regular folk? Any thoughts or ideas, instructions? I feel the plate could do with a clean and the primary mirror itself. I just want it as optimum as possible. And can a hyperstar be fitted to these older versions? Im literally starting from scratch with an sct setup. Also what type of camera would suit a scope with this focal length for faint dso's, i have a gp290c for the planetary side of imaging. Sorry for the bombardment of questions.
Hi there! I am seeking for advice from you good people.
I want to create a setup for stargazing which is fully automated. Ideally every process like scope calibration, guiding, tracking, focusing and taking photos should be done through WiFi, preferably from an iPad tablet.
Planetary imaging is the main purpose. I don't really care about deep space imaging.
I want the whole setup to be rather cheap, small and light, at the expense of imaging quality.
I am a total noob (used to play with an ETX-70 lots of years ago), but I really need the functionality I have described above.
I am thinking of using the bellow components and kindly request that you correct/add to the list:
1) AstroFi 102
2) A ZWO camera suitable for planetary imaging (any ideas for less than or equal to $250)
3) An auto focuser and motor drive (any ideas)
4) Smth like an ASi air device?
Is a guider necessary for planetary imaging, by the way?
Do you think I am in the right path?
I still have not been able to really comprehend the full picture. Is what I am asking for doable?
Thank you very much in advance!
which webcam is best for planetary imaging under 25 USD . If you have experience of any webcam for planetary work please help me out
By LR Watanabe
So I'm looking for the best grab and go planetary viewing (and maybe some DSOs) telescope that is relatively cheap (below 500$) that will also support some Astrophotography. I know the SkyMax 127 is a Maksutov and therefore has a high F number, but I'm okay with that because I'll just pop on a 0.5x focal reducer to bring it down to F/6 (still a bit high though.) With said Grab and Go I'm interested in viewing Saturn and Jupiter with high detail. What do you recommend?
Edit: I need one that'll fit into the Sky Watcher EQ5.