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arXiv 1801.02112cs.ROcs.CV
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具有离群点的姿态图优化的凸松弛算法

Convex Relaxations for Pose Graph Optimization with Outliers

Massachusetts Institute of Technology(麻省理工学院);Politecnico di Torino(都灵理工大学)

Luca Carlone, Giuseppe C. Calafiore

摘要:

位姿图优化涉及从成对测量中估计一组位姿,并为移动机器人和几何计算机视觉中出现的许多问题提供了形式化。在本文中,我们考虑的情况下,其中的一个子集的测量提供给姿态图优化是虚假的。我们的第一个贡献是开发强大的估计,可以应付重尾测量噪声,从而提高鲁棒性的存在离群值。由于所得到的估计需要解决非凸优化问题,我们进一步开发凸松弛近似通过半定规划解决这些问题。然后,我们提供的条件下,建议的放松是准确的。与现有方法不同的是,我们的凸松弛不依赖于未知姿态的初始猜测的可用性,因此它们更适合于这样的猜测不可用的设置(例如,多机器人定位、定位失败后的恢复)。我们在广泛的模拟中测试了所提出的技术,并且我们表明,所提出的一些弛豫确实是紧的(即,它们精确地解决了原始的非凸问题,并确保在面对大量离群值时的准确估计。

英文摘要:

Pose Graph Optimization involves the estimation of a set of poses from pairwise measurements and provides a formalization for many problems arising in mobile robotics and geometric computer vision. In this paper, we consider the case in which a subset of the measurements fed to pose graph optimization is spurious. Our first contribution is to develop robust estimators that can cope with heavy-tailed measurement noise, hence increasing robustness to the presence of outliers. Since the resulting estimators require solving nonconvex optimization problems, we further develop convex relaxations that approximately solve those problems via semidefinite programming. We then provide conditions under which the proposed relaxations are exact. Contrarily to existing approaches, our convex relaxations do not rely on the availability of an initial guess for the unknown poses, hence they are more suitable for setups in which such guess is not available (e.g., multi-robot localization, recovery after localization failure). We tested the proposed techniques in extensive simulations, and we show that some of the proposed relaxations are indeed tight (i.e., they solve the original nonconvex problem 10 exactly) and ensure accurate estimation in the face of a large number of outliers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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