Numerical Methods for Model-Based Pose Recovery
Rodrigo L. Carceroni, Christopher M. Brown · 1997
In this paper we review and compare several techniques for model--based pose recovery (extrinsic camera calibration) from monocular images. We classify the solutions reported in the literature as analytical perspective, affine and numerical perspective. We also present reformulations for two of the most important numerical perspective solutions: Lowe's algorithm and Phong--Horaud's algorithm. Our improvement to Lowe's algorithm consists of eliminating some simplifying assumptions on its projective equations. A careful experimental evaluation reveals that the resulting fully projective algorithm has superexponential convergence properties for a wide range of initial solutions and, under realistic usage conditions, it is up to an order of magnitude more accurate than the original formulation, with arguably better computation--time properties. Our extension to Phong--Horaud's algorithm is, to the best of our knowledge, the first method for independent orientation recovery that actually ex...