観測相関を考慮した能動探索によるロバスト物体検出
Modelling Observation Correlations for Active Exploration and Robust Object Detection
物体検出の空間依存性を学習し、測定間の相関を考慮したセンサモデルを情報空間の探索に組み込むことで、ロボットが検出性能を最大化する動作計画を生成する手法を提案した。
著者: Javier Velez, Garrett Hemann, Albert S. Huang, Ingmar Posner, Nicholas Roy
分類: cs.RO, cs.CV
原文アブストラクト
Today, mobile robots are expected to carry out increasingly complex tasks in multifarious, real-world environments. Often, the tasks require a certain semantic understanding of the workspace. Consider, for example, spoken instructions from a human collaborator referring to objects of interest; the robot must be able to accurately detect these objects to correctly understand the instructions. However, existing object detection, while competent, is not perfect. In particular, the performance of detection algorithms is commonly sensitive to the position of the sensor relative to the objects in the scene. This paper presents an online planning algorithm which learns an explicit model of the spatial dependence of object detection and generates plans which maximize the expected performance of the detection, and by extension the overall plan performance. Crucially, the learned sensor model incorporates spatial correlations between measurements, capturing the fact that successive measurements taken at the same or nearby locations are not independent. We show how this sensor model can be incorporated into an efficient forward search algorithm in the information space of detected objects, allowing the robot to generate motion plans efficiently. We investigate the performance of our approach by addressing the tasks of door and text detection in indoor environments and demonstrate significant improvement in detection performance during task execution over alternative methods in simulated and real robot experiments.
