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CVPR
2008
IEEE

A general solution to the P4P problem for camera with unknown focal length

14 years 5 months ago
A general solution to the P4P problem for camera with unknown focal length
This paper presents a general solution to the determination of the pose of a perspective camera with unknown focal length from images of four 3D reference points. Our problem is a generalization of the P3P and P4P problems previously developed for fully calibrated cameras. Given four 2D-to-3D correspondences, we estimate camera position, orientation and recover the camera focal length. We formulate the problem and provide a minimal solution from four points by solving a system of algebraic equations. We compare the Hidden variable resultant and Gr?obner basis techniques for solving the algebraic equations of our problem. By evaluating them on synthetic and on real-data, we show that the Gr?obner basis technique provides stable results. 1
Martin Bujnak, Tomás Pajdla, Zuzana Kukelov
Added 12 Oct 2009
Updated 28 Oct 2009
Type Conference
Year 2008
Where CVPR
Authors Martin Bujnak, Tomás Pajdla, Zuzana Kukelova
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