Focus stacking software is used by macro and microscope photographers (sort the opposite of astrophotography) as well as some landscape photographers, to create an apparently infinite depth of field. In use, one takes a series of photos - up to 1000 or more - each with slightly different focal point. The software finds the in-focus parts of the picture and combines them.
I am wondering if anybody has tried this for planetary imaging? The problem is similar in some ways - focus stacking software does registration - but it has the additional aspect of looking for sharp regions. There are several algorithms that are used.
This would seem to be a possible candidate for putting together the best planetary shots to do a sort of lucky imaging. In that case partial depth of field is not the problem - it is blurring of portions of the image by atmosphere effects. But the effect should be similar.
To be clear - I am not suggesting that the focus be changed between shots - just that one takes a sequence of planetary photos and find out if the software does a better job than conventional planetary image stacking.
However, if you did rack focus and combine photos at slightly different focus points, it would allow correcting field flatness, or tilted field issues.
I will hasten to point out that this is speculative on my part. But I am not the only one. While looking for examples, I found this thread on DPReview https://www.dpreview.../thread/4250969 , which shows a lunar image.
Now, it may well be the case that this does not work, but I if I had a bunch of planetary images to stack, I would try this.
Since I don't, I wonder if anybody else here has tried it, and if not, then I am making the suggestion that it might be worth trying.