楕円拡張物体追跡のための分離型二次カルマンフィルタと対数正規軸モデリング
Decoupled Quadratic Kalman Filter for Elliptical Extended Object Tracking with Log-normal Axis Modeling
物体の運動・向き・軸長を分離して推定する閉形式の楕円拡張物体追跡手法を提案し、軸長に対数正規分布を用いることで正の値のみを扱い、シミュレーションと実レーダデータで高精度・高効率を実証した。
詳しい要約
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著者: Simon Steuernagel, Marcus Baum
分類: eess.SP, cs.RO
原文アブストラクト
Extended object tracking involves estimating both the physical extent and kinematic parameters of a target object, where typically multiple measurements are observed per time step. In this article, we propose a deterministic closed-form elliptical extended object tracker, based on decoupling of the kinematics, orientation, and axis lengths. By disregarding potential correlations between these state components, fewer approximations are required for the individual estimators than for an overall joint solution. This also enables a log-normal representation of the semi-axis lengths, i.e., opposed to related approaches, only positive axis lengths have support. The resulting algorithm outperforms existing algorithms, reaching the accuracy of sampling-based procedures. Additionally, a batch-based variant is introduced, yielding highly efficient computation while outperforming all comparable state-of-the-art algorithms. This is validated both by a simulation study using common models from literature, as well as an extensive quantitative evaluation on real automotive radar data.
