Sciweavers

CVPR
2008
IEEE

Conjugate rotation: Parameterization and estimation from an affine feature correspondence

15 years 2 months ago
Conjugate rotation: Parameterization and estimation from an affine feature correspondence
When rotating a pinhole camera, images are related by the infinite homography KRK-1 , which is algebraically a conjugate rotation. Although being a very common image transformation, e.g. important for self-calibration or panoramic image mosaicing, it is not completely understood yet. We show that a conjugate rotation has 7 degrees of freedom (as opposed to 8 for a general homography) and give a minimal parameterization. To estimate the conjugate rotation, authors traditionally made use of point correspondences, which can be seen as local zero order Taylor approximations to the image transformation. Recently however, affine feature correspondences have become increasingly popular. We observe that each such affine correspondence now provides a local first order Taylor approximation, which has not been exploited in the context of geometry estimation before. Using those two novel concepts above, we finally show that it is possible to estimate a conjugate rotation from a single affine feat...
Christian Beder, Kevin Köser, Reinhard Koch
Added 12 Oct 2009
Updated 28 Oct 2009
Type Conference
Year 2008
Where CVPR
Authors Christian Beder, Kevin Köser, Reinhard Koch
Comments (0)