PACER: 選好条件付き全地形コストマップ生成
PACER: Preference-conditioned All-terrain Costmap Generation
鳥瞰図画像とユーザーの選好コンテキストを入力として、その選好に沿ったコストマップを生成する機械学習手法を提案し、新しい地形への適応と汎化性能を示した。
著者: Luisa Mao, Garrett Warnell, Peter Stone, Joydeep Biswas
分類: cs.RO, cs.CV
原文アブストラクト
In autonomous robot navigation, terrain cost assignment is typically performed using a semantics-based paradigm in which terrain is first labeled using a pre-trained semantic classifier and costs are then assigned according to a user-defined mapping between label and cost. While this approach is rapidly adaptable to changing user preferences, only preferences over the types of terrain that are already known by the semantic classifier can be expressed. In this paper, we hypothesize that a machine-learning-based alternative to the semantics-based paradigm above will allow for rapid cost assignment adaptation to preferences expressed over new terrains at deployment time without the need for additional training. To investigate this hypothesis, we introduce and study PACER, a novel approach to costmap generation that accepts as input a single birds-eye view (BEV) image of the surrounding area along with a user-specified preference context and generates a corresponding BEV costmap that aligns with the preference context. Using both real and synthetic data along with a combination of proposed training tasks, we find that PACER is able to adapt quickly to new user preferences while also exhibiting better generalization to novel terrains compared to both semantics-based and representation-learning approaches.
