Photogrammetry

Using photographic pictures, patterns of electromagnetic radiant imaging, and other occurrences, photogrammetry is the science and technology of gathering accurate information about real-world objects and the surroundings.

Albrecht Meydenbauer, a Prussian architect, first used the word photogrammetry in his 1867 paper "Die Photometrographie."

Photogrammetry comes in a wide variety. The extraction of three-dimensional measurements from two-dimensional data (i.e., images) is one example. For instance, if the scale of the image is known, the distance between two points that are on a plane parallel to the photographic image plane can be determined by measuring their distance on the image. Another is the exact colour range and value extraction from pictures of materials to represent such properties as albedo, specular reflection, metallicity, or ambient occlusion for physically based rendering.

In comparison to standard aerial (or orbital) photogrammetry, close-range photogrammetry refers to the collecting of images taken at a closer range. In order to attempt to sequentially estimate, with increasing precision, the real, 3D relative movements, photogrammetric analysis may be applied to a single image or may employ high-speed photography and remote sensing to detect, measure, and record complex 2D and 3D motion fields.

Applications:

Topographic mapping, architecture, engineering, manufacturing, quality control, police investigation, cultural heritage, and geology are just a few of the industries that employ photogrammetry. When objective meteorological data cannot be collected, meteorologists use it to estimate the wind speed of tornadoes, and archaeologists use it to swiftly construct designs of big or complicated sites.

• Mapping
• Archaeology
• 3D modeling