What algorithm do virtual fitting rooms work on?

Question

3D

Good day to all. There are such virtual fitting rooms that put 3D clothing models on a person in real time, and when a person moves and turns, the model becomes at the right angle. How is this implemented, how is this very angle calculated and the 3D model rotated correctly?

Answer 1

habrahabr.ru/post/234203

Answer 2

Most "on the forehead":
We scan the space every 0.3-1 sec. We believe that the closest object with some errors is a person. We remember. When the diff of the original and the new scan start to diverge, we check what went wrong, which side moved out. If the right side of the body has become "further", then the object has turned to the right, and so on.