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Ideas for processing 2,200 Ha eclipse images

9 replies to this topic

#1 hrhett

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Posted 10 April 2024 - 05:36 PM

All,

 

I have a Lunt LS60 Ha that I had my DSLR piggybacked to. Throughout the eclipse I had to manually recenter the telescope so the images aren’t registered. Best yet, with a transiting moon across the sun, any reference point would be likely lost in processing (i.e. stacking) software. I’m looking for suggestions on how I can register the entire stack.

 

Ideas are welcome.

 

Howard R.



#2 Tulloch

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Posted 10 April 2024 - 06:24 PM

Try the Solar or Eclipse forums. This a Planetary AP forum.

 

https://www.cloudyni...ng-and-imaging/

https://www.cloudyni...solar-eclipses/



#3 N-1

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Posted 10 April 2024 - 06:48 PM

PiPP has an ability to track & centre an object part of which is in shadow, i.e. not to be used as reference while the other part(s) of the limb are. I'm sure other apps can do similar.

 

PiPP Edge in Shadow.jpg

 

Field rotation may be an issue though, depending on what you want to do.



#4 Borodog

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Posted 12 April 2024 - 03:12 PM

PiPP has an ability to track & centre an object part of which is in shadow, i.e. not to be used as reference while the other part(s) of the limb are. I'm sure other apps can do similar.

 

attachicon.gif PiPP Edge in Shadow.jpg

 

Field rotation may be an issue though, depending on what you want to do.

I've never understood how that feature works. Can you explain it?



#5 hrhett

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Posted 14 April 2024 - 12:29 AM

PiPP has an ability to track & centre an object part of which is in shadow, i.e. not to be used as reference while the other part(s) of the limb are. I'm sure other apps can do similar.

 

attachicon.gif PiPP Edge in Shadow.jpg

 

Field rotation may be an issue though, depending on what you want to do.

Do you know what version of pipp you're running? I've downloaded both 238 & 259, neither has the center function.



#6 HxPI

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Posted 14 April 2024 - 01:27 PM

PIPP is not doing a good job aligning with shadow option selected. Without shadow option selected, the images center but the thin crescent moves toward the center since it’s the brightest part of the eclipsed images. Using surface feature isn't working either. Not sure why it doesn’t keep the eclipsed disc images aligned along the same edge of the reference full disc sun. Unless another tool is available to align these images, the only way is manual anchor point alignment, not a pleasant process.

 

P.S. For some reason PIPP is also changing the brightness of exported images, I’ve verified every option to no avail, a better tool is needed.


Edited by HxPI, 14 April 2024 - 01:33 PM.


#7 Lopper

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Posted 14 April 2024 - 01:50 PM

Did you try varying which edge is in shadow from the dropdown menu? Even if the dark silhouette of the Moon is actually in the bottom right hand side of the image, you might try using the bottom ride hand side, top right hand side, and right hand side settings and see if one of them works better than the others. I found that to be the case for my images. For the initial partial phase the dark silhouette of the Moon was in the bottom right hand side, but the setting that ended up working best to register all of those frames was the top right hand side setting. Not sure why that worked best but it did. For the final partial phase, the dark silhouette of the Moon was in the top left hand side and the top left hand side setting indeed worked best for those frames.

 

You can tell PIPP to stretch the histogram white point of each image to some arbitrary value to normalize the brightness of the frames. That feature is also on the processing options tab. I used it to adjust for the dimming of some frames caused by thin clouds that passed overhead throughout both partial phases.



#8 HxPI

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Posted 14 April 2024 - 06:17 PM

I tried every shadow option, none worked well with default brightness. Good point about trying increasing brightness, I’ll give that a try. Thanks for sharing.

#9 SM881

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Posted 21 April 2024 - 04:29 PM

All,

 

I have a Lunt LS60 Ha that I had my DSLR piggybacked to. Throughout the eclipse I had to manually recenter the telescope so the images aren’t registered. Best yet, with a transiting moon across the sun, any reference point would be likely lost in processing (i.e. stacking) software. I’m looking for suggestions on how I can register the entire stack.

 

Ideas are welcome.

 

Howard R.

I used semi-successfully PIPP.  It did great for images with a solar surface greater than 70%.  I had to do the rest manually.



#10 happylimpet

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Posted 24 April 2024 - 08:43 AM

Do you know what version of pipp you're running? I've downloaded both 238 & 259, neither has the center function.

It doesnt appear until you select the planetary frame stabilization mode at the top, as per the screenshot above.





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