Understanding Photogrammetry thanks to Albrecht Durer

Understanding photogrammetry thanks to Albrecht Durer

For me this drawing goes a long way towards explaining the geometry of capturing 3D points on a 2D plane. With this drawing we can better understand how a photograph is, in its essence, a relationship between a 2D plane and a single 3D point of view.  In photogrammetry, it is the precise understanding of the relationship between the focal point of a lens and the plane defined by the sensor (used to be the negative) that provides the basis for “back calculating” camera stations. When I read back what I’ve written it sopunds like gibberish. Its just not easy to explain. Probably an animation sould do the trick. in the mean time, looking at this picture above and the diagram below might help.

Stereo pair diagram

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