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Bert
I summed-combined the images, because I wanted to make a direct comparison with the image I posted yesterday, which was sum combined.
Regardless, I can go back and repeat with a median combine.
I have 23 images in the stack (and even my 64bit 8Gb RAM machine nearly died in the process)
The image I posted yesterday, is at the native resolution - but I did not post my result from my attempt at your technique last night.
I have DSS....so I will upscale using CCDSTACK at 1.6 times and use bicubic, then use DSS and the algorithim you list to median combine.
let you know how it goes.
cheers
Martin
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