How is a 3D terrain model made?

Question

3D

The task was to make a fast 3D terrain model!
There are 2 quadrocopters with cameras, is it possible to make a 3D model from ordinary photographs?
Or tell me which way to look ...
Thank you!

Answer 1

Here is an article found 3d-daily.ru/soft/copter-express-3dscan.html

Answer 2

Take a look at the commercial one at Agisoft PhotoScan, it does exactly what you need.
From the open VisualSFM.