I do a third variant:
I do mild wavelet sharpening with very little to no noise reduction for each video sequence. Then I derotate and stack the resulting images in WinJUPOS. With that single image, I do the final sharpening, noise reduction and color processing.
As far as I understand, derotation is a very clever variant of „shift & add“, so derotating several images should reduce noise similar to regular stacking. At least, I hope so... still new to this.
Not sure if that is ultimately the best way, but so far I achieve the best results with it.
This is exactly how I do it. For example, as we speak*, i am taking the 9% drizzle 1.5x stacks of Mars, copying them into another directory, running all of them through identical registax wavelets (with minimal noise reduction, so all show a little noise). I then combine these in Winjupos, and then do final deconvolution and noise reduction. In fact I think this is fairly standard.
But out of curiosity, I recently tried de-rotating the unsharpened image stacks. This seem to work quite well for Jupiter, and it would mean I could apply sharpening one time to the final result. It does seem to result in some edge artefacts however, so I'm still in two minds as to the best approach.
Those edge artefacts became a real problem when I tried that method on Saturn, due to the rings.
And this is one very good reason why i dont derotate un-waveletted stacks!
Also, doing a first pass of sharpening allows one to throw out the crap and just include the best runs.
EDIT: *UNLESS YOU SPEAK TO MY BOSS, IN WHICH CASE IN WORKING ON THAT REPORT.
Edited by happylimpet, 16 July 2020 - 03:47 AM.