Radar-only ego-motion estimation in difficult settings via graph matching

Abstract – Radar detects stable, long-range objects under variable weather and lighting conditions, making it a reliable and versatile sensor well suited for ego-motion estimation. In this work, we propose a radar-only odometry pipeline that is highly robust to radar artifacts (e.g., speckle noise and false positives) and requires only one input parameter. We demonstrate its ability to adapt across diverse settings, from urban UK to off-road Iceland, achieving a scan matching accuracy of approximately 5.20 cm and 0.0929 deg when using GPS as ground truth (compared to visual odometry’s 5.77 cm and 0.1032 deg). We present algorithms for keypoint extraction and data association, framing the latter as a graph matching optimization problem, and provide an in-depth system analysis.

Further Info – For more experimental details please read our paper:

  • [PDF] S. Cen and P. Newman, “Radar-only ego-motion estimation in difficult settings via graph matching,” in Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Montreal, Canada, 2019.
    [Bibtex]
    @InProceedings{2019ICRA_cen,
    author = {Cen,Sarah and Newman, Paul},
    title = {Radar-only ego-motion estimation in difficult settings via graph matching},
    booktitle = {Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Montreal, Canada},
    year = {2019},
    pdf = {http://www.robots.ox.ac.uk/~mobile/Papers/2019ICRA_cen.pdf},
    }

For a quick overview you can take a look at our video: