Author Topic: Total eclipse of the sun  (Read 3043 times)

Offline rwittich

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Total eclipse of the sun
« on: 2015 March 30 11:00:10 »
Hi,

I  took images of the total eclipse of the sun in Svalbard. Canon EOS 5D Mark III with Canon EF 400mm f/5.6 @ f/5.6 at fixed tripod
29 sequences of exposures: 1/4000 s, 1/1250 s, 1/400 s, 1/125 s, 1/40 s, 1/13 s, 1/4 s @ ISO 200
I want to align these images. How can I do this in PixInsight?
There are no stars in the images.
I tried FFTRegistration script but did not suceed.

Thanks for your help

Reinhold

Offline Carlos Milovic

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Re: Total eclipse of the sun
« Reply #1 on: 2015 March 30 13:08:54 »
Hi Reinhold

You may try the FFT and Taylor based registrations that are on my development modules: http://astrophoto.cl/Research.html
(I have to fix the links in that page to include some windows and osx downloads... just replace the file extension to get it to work... sorry!)

We are also working on a registration process that will work pretty much like StarAlignment, but using image features. It should work with solar, lunar and planetary images. We have a very early process working, but unfortunatelly the results are not as good as we want, so this is going to need more time.
Regards,

Carlos Milovic F.
--------------------------------
PixInsight Project Developer
http://www.pixinsight.com

Offline oldwexi

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Re: Total eclipse of the sun
« Reply #2 on: 2015 March 30 16:10:34 »
Hi Carlos!
Having the same issue.

The PI Script FFTRegistration and your FFTRegister .dll dont work on my solar Images. (300mm focal length with DSLR Canon550)
More or less no movement of the resulting "registered" Image is visible.

Also the manual StarAlignment does not work.
The only workaround was to create a black Image with a center circle in sunsize and move the solar Image over it und and do a screencopy and so on and so on.
with 400 Images a lifetime Job...
So, some autoamted mode which keeps the 12Bit Quality would be nice.

Gerald

Offline RickS

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Re: Total eclipse of the sun
« Reply #3 on: 2015 March 30 22:24:10 »
For the 2012 TSE I measured the delta in pixels between my initial and final frames, used the timestamps in the files to calculate x and y velocities and then calculated an offset for every intermediate frame based on its timestamp and used PixelMath to register it.  It was a lot of work.  If I had to do it again I would script it  ;)

Cheers,
Rick.

Offline rwittich

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Re: Total eclipse of the sun
« Reply #4 on: 2015 March 31 03:16:38 »
Hi Carlos,

I visited your site and found the TaylorRegister Module for Linux. But I need it for Windows. Is it available for Windows?

Best wishes

Reinhold

Offline rwittich

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Re: Total eclipse of the sun
« Reply #5 on: 2015 March 31 03:18:07 »
Hi Rick,

I cannot use your method because I moved the camera in the middle of the eclipse to have the sun nearer to the center of the image in all frames.

Best wishes

Reinhold