Quote:
Originally Posted by iceman
Beautiful! Can you share any details of what you did in PI or PS?
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Thanks, Mike. I'm going to write up my workflow after I try a few more ideas but I can give a brief explanation of what I've done so far...
I collected a large number of bracketed images using a DSLR on a fixed tripod. I did take a mount with me but it wouldn't track (that'll teach me for not testing it at home!) That means my main problem is registering the images. To get good results, registration needs to be done on the corona itself, not on the moon which is moving wrt to the corona.
Roughly what I did was this:
- convert images to TIFF
- in small batches, I used the PI FFTRegistration script to register and sum the images (this registers against the moon, but over a short time period that shouldn't smear the corona too much)
- I used the PI LarsonSeknina filter to process each of the summed images. I used a few different parameters to pull out detail at different scales and then summed these using PixelMath back into one image again (for each batch)
- I used PS to manually register each of the batch images.
- I went back to PI and summed all the batch images using PixelMath
- Finished up with some sharpening, noise reduction, etc
- Back to PS to drop an original copy of the moon into the middle of the image
The image I posted was using 4 x 9 images. I have a lot more than that, so I hope to get better results when I stack everything. I also have some ideas for more accurate stacking but it will probably require scripting.
Cheers,
Rick.