Funny I tried to solve this problem for a long time... still unsolved.
If you have (several) high resolution photos and good enough angles, you can do a 3D reconstruction of the person. There are several projects on Github, which might or might not use AI, and that have different approaches to the problem. OpenMVG is probably the biggest, developed by the friendly French guy Pierre Moulon at IRIS.
You should specifically look into Structure from Motion if you are using photos and not videos, because certain algorithms need time consistency between the images.
https://github.com/openMVG/awesome_3DReconstruction_list
