I had an idea to use 2D images to extract data about wind velocity from raindrops. (Determining Wind Velocity from Images of Raindrops) which inspires me to ask this question.
I understand that there are efforts to Use 2D images to create 3D models of historic places.
My question is, are there any existing technologies which use 2D images to extract 3D data?
I don't count Using 2D images to create 3D models of historic places, I'm looking for things which extract useful data which we can input. For example, extracting wind velocity data can be used to help pilots. I understand that using 2D images is waaay far from optimal in applications like gathering rain data, and that in specific applications such as FBI wanting to examine videos of people getting slashed (they want to get data about the slashing by examining the trajectories of blood etc.) (I understand that resolution of cameras in such situations are probably waay too low to allow useful examination of blood trajectories)
However, I'm just curious whether such technologies really exist, optimal or not, modern or not.