document: Geotensity : combining motion and lighting for 3D surface reconstruction This paper is about automatically reconstructing the full 3D surface of an object observed in motion by a single static camera . Based on the two paradigms , structure from motion and linear intensity subspaces , we introduce the geotensity constraint that governs the relationship between four or more images of a moving object . We show that it is possible in theory to solve for 3D Lambertian surface structure for the case of a single point light source and propose that a solution exists for an arbitrary number point light sources . The surface may or may not be textured . We then give an example of automatic surface reconstruction of a face under a point light source using arbitrary unknown object motion and a single fixed camera
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