On Monday, January 31, 2022 at 5:06:20 PM UTC-5 [email protected] wrote:

> See the ptomorph proof of concept from ten(!) years ago here: 
> https://groups.google.com/g/hugin-ptx/c/UripOuuYXCQ?pli=1 
>
> This works incredibly well, with no need for low-priority control 
> points, but I never pursued it, and it needs some thought regarding 
> getting it to work with more than two photos. 
>
> I guess I need to learn more about the pano scripting etc.  At this point, 
a few gaps in my knowledge stop me from even following the discussion there.

Looking at the full stitched version  vs. the full morphed version, the 
stitching error in the full morphed version (where the silver pole crosses 
the boundary between the top and second to top window of the glass windowed 
cabinet) is surprising for the described method, though I expect a few 
control points could fix it.

The overall shape differences are more concerning.  That specific scene is 
one in which broad shape differences are hard to visually parse.  So I 
can't validate my guess that in other examples the shape change of that 
method would be too big.

Both the big shape change and the issues of chaining the methodt across 
more photos are reasons that I was thinking of the morph as a fine tune on 
top of existing methods, rather than as a replacement.

For many examples, just the morph would be a lot better than the existing 
methods, so it is sad that you didn't have time to pursue that as another 
choice within the Hugin GUI.

>From that discussion:
> Panotools also uses a not-very-nice distortion where it splits the image 
up into triangles and performs an affine transformation on each triangle 
separately 

That is certainly what I had in mind (possible just because I don't know 
better ways).  I expect that using this as a fine tune, rather than as the 
primary method, would eliminate the problems with that method.

Anyway, thanks for providing a lot more information on this topic than I 
expected to get (even though I have significant learning to do before I can 
try using any of that).

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