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Fusion of Optical Flow and Inertial Measurements for Robust Egomotion Estimation

Publication date:

Authors:

  • Presented at: IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2014), Chicago, Illinois, September 14–18, 2014
  • Publication date: 2014

In this paper we present a method for fusing optical flow and inertial measurements. To this end, we derive a novel visual error term which is better suited than the standard continuous epipolar constraint for extracting the information contained in the optical flow measurements. By means of an unscented Kalman filter (UKF), this information is then tightly coupled with inertial measurements in order to estimate the egomotion of the sensor setup. The individual visual landmark positions are not part of the filter state anymore. Thus, the dimensionality of the state space is significantly reduced, allowing for a fast online implementation. A nonlinear observability analysis is provided and supports the proposed method from a theoretical side. The filter is evaluated on real data together with ground truth from a motion capture system.

    Reference

    • Detailed record: https://infoscience.epfl.ch/record/200256?ln=en
    • EPFL-CONF-200256
    Reference
    Read the paper
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