Plane+Parallax, Tensors and Factorization

  • Authors:
  • Bill Triggs

  • Affiliations:
  • -

  • Venue:
  • ECCV '00 Proceedings of the 6th European Conference on Computer Vision-Part I
  • Year:
  • 2000

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Abstract

We study the special form that the general multi-image tensor formalism takes under the plane + parallax decomposition, including matching tensors and constraints, closure and depth recovery relations, and inter-tensor consistency constraints. Plane + parallax alignment greatly simplifies the algebra, and uncovers the underlying geometric content. We relate plane + parallax to the geometry of translating, calibrated cameras, and introduce a new parallax-factorizing projective reconstruction method based on this. Initial plane + parallax alignment reduces the problem to a single rank-one factorization of a matrix of rescaled parallaxes into a vector of projection centres and a vector of projective heights above the reference plane. The method extends to 3D lines represented by via-points and 3D planes represented by homographies.