GeoReFormer: レーンセグメント検出とトポロジー推論のための幾何認識リファインメント
GeoReFormer: Geometry-Aware Refinement for Lane Segment Detection and Topology Reasoning
トランスフォーマーベースの3Dレーンセグメント検出とトポロジー推論において、幾何学的・トポロジー的な帰納バイアスをデコーダに組み込んだ統一アーキテクチャGeoReFormerを提案し、OpenLane-V2ベンチマークでSOTA性能を達成した。
詳しい要約
1. どんなもの?
2. 先行研究と比べてどこがすごい?
3. 技術・手法の肝は?
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著者: Danny Abraham, Nikhil Kamalkumar Advani, Arun Das, Nikil Dutt
分類: cs.CV, cs.RO
原文アブストラクト
Accurate 3D lane segment detection and topology reasoning are critical for structured online map construction in autonomous driving. Recent transformer-based approaches formulate this task as query-based set prediction, yet largely inherit decoder designs originally developed for compact object detection. However, lane segments are continuous polylines embedded in directed graphs, and generic query initialization and unconstrained refinement do not explicitly encode this geometric and relational structure. We propose GeoReFormer (Geometry-aware Refinement Transformer), a unified query-based architecture that embeds geometry- and topology-aware inductive biases directly within the transformer decoder. GeoReFormer introduces data-driven geometric priors for structured query initialization, bounded coordinate-space refinement for stable polyline deformation, and per-query gated topology propagation to selectively integrate relational context. On the OpenLane-V2 benchmark, GeoReFormer achieves state-of-the-art performance with 34.5% mAP while improving topology consistency over strong transformer baselines, demonstrating the utility of explicit geometric and relational structure encoding.
