Uncalibrated Factorization Using a Variable Symmetric Affine Camera

  • Kenichi Kanatani
  • Yasuyuki Sugaya
  • Hanno Ackermann
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3954)


In order to reconstruct 3-D Euclidean shape by the Tomasi-Kanade factorization, one needs to specify an affine camera model such as orthographic, weak perspective, and paraperspective. We present a new method that does not require any such specific models. We show that a minimal requirement for an affine camera to mimic perspective projection leads to a unique camera model, called symmetric affine camera, which has two free functions. We determine their values from input images by linear computation and demonstrate by experiments that an appropriate camera model is automatically selected.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Kenichi Kanatani
    • 1
  • Yasuyuki Sugaya
    • 2
  • Hanno Ackermann
    • 1
  1. 1.Department of Computer ScienceOkayama UniversityOkayamaJapan
  2. 2.Department of Information and Computer SciencesToyohashi University of TechnologyToyohashi, AichiJapan

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