Institutionen för systemteknik (ISY)

Practical Pose Trajectory Splines With Explicit Regularization

Mikael Persson, Gustav Häger, Hannes Ovrén, Per-Erik Forssén
3DV21
International Virtual Conference on 3D Vision (3DV 2021)
December 2021

Abstract

We investigate spline-based continuous-time pose trajectory estimation using non-linear explicit motion priors. Current regularization priors either linearize the orientation, rely on the implicit regularization obtained from the used spline basis function, or use sampling based regularization schemes. The latter is a special case of a Riemann sum approximation, and we demonstrate when and why this can fail, and propose a way to avoid these issues. In addition we provide a number of novel practically useful theoretical contributions, including requirements on knot spacing for orientation splines, new basis functions for constant velocity extrapolation, and a generalization of the popular P-Spline penalty to orientation. We analyze the properties of the proposed approach using synthetic data. We validate our system using the standard task of visual-inertial calibration, and apply it to stereo visual odometry where we demonstrate real-time performance on KITTI.

Full Paper

Portable document format file PDF ()
Paper available at the 3DV proceedings. [3DV session video (at 1:20:56)] Code is available at: [GitHub]

Video on YouTube.

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Bibtex entry

@InProceedings{persson21b,
  author = 	 {Mikael Persson and Gustav H\"ager and Hannes Ovr\'en and Per-Erik Forss\'en},
  title = 	 {Practical Pose Trajectory Splines With Explicit Regularization},
  booktitle = {International Virtual Conference on {3D} Vision ({3DV 2021})},
  month = {December},
  year = {2021}
}