In aerial photogrammetry - or drone photogrammetry - the camera is mounted on an aircraft or done and is usually pointed vertically at the ground, with multiple overlapping photos taken as the aircraft or drone moves along a flight path. There are two main types of photogrammetry – aerial and terrestrial photogrammetry. Photogrammetry software is also often more accessible and affordable, as it can be as simple as inputting a photo from your smartphone’s camera into the software and then having a 3D reconstruction automatically generated. It allows you to capture large objects, such as buildings and landscapes, that would be impossible to scan any other way. Photogrammetry is useful in the world of 3D printing as it’s a technique for 3D scanning. Photogrammetry software can then align, texture and mesh multiple pictures to create a 3D model. It works by extracting the geometric information of a 2D image, such as the shape, volume and depth of an object. Photogrammetry uses the parallax obtained between several overlapping images taken from different points of view. The best photogrammetry software can automatically generate 3D models from photos. The process begins with taking photographs and inputting them into photogrammetry software, with the output being a drawing, measurement, map or 3D model of a real-world object or scene. Photogrammetry is the science of extracting 3D information, such as measurements, from photographs.
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