Photogrammetry is a non-contact scanning technology that utilizes photographs to make scientific measurements and create digital modeling in 3D. With photogrammetry, It is possible to determine the distance between two points in a photograph if the scale of the image is given.

Photogrammetry uses optics, the study and behavior of light, combined with projective geometry to determine points on an object. The distance between these points are then estimated and a 3D digitized model is created.

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