Ullman's Theorem in Two Dimensions

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In the field of computer vision reconstructing an object using a video of its motion is known as the structure from motion problem. This Demonstration illustrates the reconstruction for three orthographic cameras and three points in the plane. The reconstruction is unique modulo the group of Euclidean transformations and reflections in the plane. The user can change the projection parameters. The inversion computes the camera and point configurations from these projections.
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Contributed by: Oliver Knill (Harvard University) (March 2011)
Open content licensed under CC BY-NC-SA
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Based on work by: Oliver Knill and Jose Ramirez-Herran
See the author's page for more details.
Permanent Citation
"Ullman's Theorem in Two Dimensions"
http://demonstrations.wolfram.com/UllmansTheoremInTwoDimensions/
Wolfram Demonstrations Project
Published: March 7 2011