PHOTOGRAMMETRY.
What is Photogrammetry?
- Alternative to laser scanning for creating 3D models, photogrammetry uses active light sources, and photographs to gather data.
- Process of digitalisation of information by which it is possible to reconstruct a physical element such as a building.
- It is based on a computation performed by specialised software that transforms the 2D information collected in the photographs and converts them into 3D models.
Advantages
- A camera and photogrammetry software are usually less expensive and much easier to transport!
- ability to reproduce an object in full color and texture.
- Can be used in tight indoor spaces.
Workflow
- Raw photos taken off the building elements are loaded into a special program where the computation is developed creating points by overlapping the photographs
- Point clouds are then created after processing images and reconstructing the points
- A polygonal mesh is obtained after unifying all point clouds and exported to a 3D modelling software
- A technician would begin translating data into components such as walls, floors, windows and so on This is the most time-intensive part as it requires high fidelity to the details of the existing conditions.
