On Monday, July 25, 2022 at 2:29:46 AM UTC-4 [email protected] wrote:

> I have been wanting to stitch aerial images for a long time but never 
> succeeded. But I guess it's not possible to stitch them because of parallax
> mistakes in the pictures.


I would expect aerial images of mountains would be impossible to stitch 
correctly because of parallax problems.

But if the surface photographed is relatively flat (vs. the altitude from 
which it is photographed) there should be a correct way to stitch.

Someone who understands Hugin's stitching  better than I do my correct me 
on this, but so far as I understand:
When the camera position is moved between images, you need some model of 
the target surface in order to remap the images.  Hugin can model the 
target as a flat surface at an arbitrary angle relative to its viewing 
angle from the camera position.  Given a decent collection of control 
points, optimization can find the position of the camera and the viewing 
angle of the camera (yaw, pitch and roll) AND also compute the angle of the 
target surface.

If the altitude of the camera is great enough relative to the surface 
texture, that computation should remove parallax issues.

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