Photogrammetry has now been used for more than 150 years by the mapping and surveying industry and it is now used in many other fields such as architecture and cultural heritage, geology and archaeology, engineering and more recently in the film and gaming industry. Photogrammetry appeared in the middle of the 19th century and was first used to produce topographic maps. The photographs can be taken from the ground with a hand-held camera, through a rig or mounted in a drone, helicopter, or fix-wing platforms or from satellite. Photogrammetry can be applied regardless of the size of the objects to be digitally re-created from a small rock to an entire city.
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The photographs are then stitched together using the principle of triangulation through specialised photogrammetry software such as Bentley ContextCapture, Capturing Reality Realit圜apture, Agisoft Metashape, Skyline Photomesh, nFrames Sure to produce a detailed, geometrically accurate and textured 3D mesh of this asset. Photogrammetry is the process of generating a three-dimensional representation of an asset using overlapping high-resolution photographs taken from multiple angles. This article gives an overview of where the technology stands today and where are we heading.
Before being game-ready, 3D assets generated by photogrammetry need to be optimised to reduce rendering cost and hardware/software limitations. While computing power and GPU is increasing, there is still a limit to the amount of 3D data which can be displayed in real-time. Originally used by the mapping and surveying industry, photogrammetry is now being used more and more in the gaming industry to create ultra-realistic 3D assets and produce immersive and interactive real-time 3D environments.
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