This is a more sophisticated technique than simple photogrammetry, involving estimating the three-dimensional coordinates of points
on an object. These are determined by measurements made in two or more photographic images taken from different positions. Common
points are identified on each image. A line of sight can be constructed from the camera location to the point on the object. It is
the intersection of these rays (triangulation) that determines the three-dimensional location of the point.
Here an entire house is being converted into a 3D image from simple 2D photos