Structure from motion (SFM) photogrammetry vs terrestrial laser scanning
Structure from Motion (SfM) has its roots in the well established spatial measurement method of photogrammetry, but is becoming increasingly recognised as a means to capture dense 3D data to represent real world objects, both natural and man made. This capability has conventionally been the domain of the terrestrial laser scanner (TLS) a mature and easy to understand method used to generate millions of 3D point coordinates in a form known as a "point cloud" Each technique is described and noted for its strengths and weaknesses.