Shots from yesterday morning with new processing technique.

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Cschur
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Shots from yesterday morning with new processing technique.

Post by Cschur »

While the white light images here are using registax 6 to post process, because it brings up the granulation better, the halpha images are post processed not with wavelets, but an iterative high pass filter process. Thats all Ill say for now on this method, but the difference was so striking when I first tried it, I nearly fell out of my chair. Here are two examples to demonstrate. The first image is the very best I could do with registax 6, going for the highest res possible. the second image is with the iteration technique. Now that you have looked at these, see the rest here:

http://www.schursastrophotography.com/solar/123011.html

Post process using registax 6 wavelets:





And here, same stacked file, using only iterative processing:




Chris Schur

----------------------------------

Birch Mesa Observatory, Payson Arizona

Clear Creek Canyon Observatory, Happy Jack, Arizona
NandoPG

Re: Shots from yesterday morning with new processing technique.

Post by NandoPG »

Wow Chris your images are excelling. I went through your Daily Report for 29th December and in addition to find a presentation 5 stars, the quality of your images either in white light or Ha is something extraordinary !!
Something you said, I agree 100%: the wavelets in Registax 6.0 doesn't apply for Solar images. You mentioned that you use an interactive routine based in High Pass Filtering. That is a very good approach.
Another thing you mentioned in your report that called my attention was the use of a PM x5 in one of your images. I tried to use a PM x5 in my Lunt 60mm (double stacked etalon) and all I got were inclined lines superimposed to the image, like a TV image with a strong interference, you know...about the same look. I called Lunt and I was told that a x5 PM is just too much for a 60mm scope. What do you think ?

Thank you very much for all this wonderful material you shared.

Fernando


Pedro

Re: Shots from yesterday morning with new processing technique.

Post by Pedro »

Try changing the parameters in the Wavelets TAB (Registax 5 and 6). I usually change the default value (50) to 500 or 1000 (registax 5 and 6 does not hold this number - you will have to change it every time you start the program). Also try using gaussian as wavelet filter.

It works fine for me. Post-processing should of course be done with PS CS

best regards


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Re: Shots from yesterday morning with new processing technique.

Post by Montana »

Beautifully done Chris! I also found I was losing 100x the detail when using wavelets. I always do very minimal Wavelets and use the sharpening tools in Photoshop instead.

I went from this
http://www.flickr.com/photos/alexandra4 ... 535811777/

to this
http://www.flickr.com/photos/alexandra4 ... 535811777/

(same photo) and I have never looked back!

Regards
Alexandra


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Re: Shots from yesterday morning with new processing technique.

Post by marktownley »

Excellent! I look forward to hearing more about this...


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Re: Shots from yesterday morning with new processing technique.

Post by Cschur »

I think for everyone that does solar and any time of astronomical imaging, a variety of process must be tried to fit thier style and needs. I have a specific goal of getting my work published, but others may do it for different reasons. It boils down to fast and easy vs how much work do you want to do during processing.


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Clear Creek Canyon Observatory, Happy Jack, Arizona
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Re: Shots from yesterday morning with new processing technique.

Post by Merlin66 »

NandoPG,
Sounds like a case of Newton Rings...
I sometimes get them with a x2.5 Powermate and the double stack SM60....
(I was advised it may be related to the thickness of the cover plate on the CCD sensor...)
A flat field will reduce the impact....


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NandoPG

Re: Shots from yesterday morning with new processing technique.

Post by NandoPG »

Merlin66,
Thanks for the hint. I will try it next time. I have a field flattener with 1.25" threads that will do the job. I will let you know the outcome.

Happy New Year,

Fernando


Ken Crawford

Re: Shots from yesterday morning with new processing technique.

Post by Ken Crawford »

Try changing the parameters in the Wavelets TAB (Registax 5 and 6). I usually change the default value (50) to 500 or 1000 (registax 5 and 6 does not hold this number - you will have to change it every time you start the program). Also try using gaussian as wavelet filter.

It works fine for me. Post-processing should of course be done with PS CS

best regards

Agreed! I have always used selective Hi-Pass as part of the processing flow in post after using mild wavelets. But I also find that the HDR Toning tool has some interesting sharpening to add also.

As far as Hi-pass additions, be sure to check different blending modes other than overlay. An effetive approach is to also use the soft light blending mode / high - pass for a softer effect. In the DSO world we have called hi-pass a synthetic type of wavelets in PS as you can "control" the freqency that it applies. And used with masks or selections you can really control the process.

Have fun!


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Re: Shots from yesterday morning with new processing technique.

Post by swisswalter »

Hi Chris

striking difference. Now, come on, please tell us more about it


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Re: Shots from yesterday morning with new processing technique.

Post by Cschur »

Walter the process is simple, I'm in the process of writing it up.


Chris Schur

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Clear Creek Canyon Observatory, Happy Jack, Arizona
Pedro

Re: Shots from yesterday morning with new processing technique.

Post by Pedro »

Me too. I'm eager to learn more image processing methods

best


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Re: Shots from yesterday morning with new processing technique.

Post by marktownley »

Walter the process is simple, I'm in the process of writing it up.

Good good!!! ;)


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Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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