3D Scanning technology – Photogrammetry – In a shortened definition, Photogrammetry 3D Scanning is the science to achieve measurements from photographs.
The input data of Photogrammetry is usually images, and the output is a map, drawing, measurements or 3D CAD model of a real-life object.
3D Scanning technology – Photogrammetry
Types of Photogrammetry:
Aerial Photogrammetry:
In aerial photogrammetry, the camera is attached on the body of an airplane and positioned vertically downward. Multiple overlapping images are taken when the airplane fly on a fixed flight path.
Aerial photogrammetry is traditionally set up on a manned aircraft, but now many projects are executed with the use of drones and UAV (Unmanned Aerial Vehicles).
After the imagery data is collected, it will be processed by automated software and the output will be in the form of topographic maps and drawings.
3D Scanning technology – Photogrammetry
Terrestrial Photogrammetry:
The camera is placed on the ground, handheld or on tripod. This form of photogrammetry is usually non-topographic, as in, the output of collected data will not be in the form of topographic models or maps, but in the form of drawings, 3D models, measurements, or point-cloud.
Terrestrial photogrammetry is usually used to scan and measure houses, engineering structures, forrensic scenes and accidents, mines, archeological sites, etc.
3D Scanning technology – Photogrammetry
Reference:
Photogrammetry, 2017, “What is photogrammetry”, [ONLINE]. Available from Photogrammetry at URL: http://www.photogrammetry.com/
3D Scanning service at Smart Design Labs:
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