時計を曲げる:イベントベース物体検出における遅延を克服する先読み予測
Bend the Clock: Predicting Ahead to Beat Latency in Event-Based Object Detection
イベントカメラの物体検出で、予測が利用可能になる時点の物体状態を予測するChronoFuseを提案し、遅延による精度低下を大幅に回復した。
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著者: Biswadeep Sen, Benoit R. Cottereau, Nicolas Cuperlier, Terence Sim
分類: cs.RO, cs.CV
原文アブストラクト
Event cameras promise low-latency perception for high-speed robotic systems, where even short delays can render detections stale by the time they inform downstream robotic decisions. Yet modern event detectors still require tens of milliseconds of computation before their predictions become available. Conventional evaluation ignores this delay by comparing predictions with annotations at the observation timestamp, even though the scene may have changed by the time those predictions are produced. We study this observation-availability mismatch in event-based multi-object detection and show that state-of-the-art event detectors degrade substantially when evaluated at prediction availability rather than observation time. To address this, we introduce ChronoFuse, a causal availability-time detector that predicts object states for when its output becomes available rather than for when its input was observed. ChronoFuse performs causal cross-time fusion over a multi-scale feature hierarchy, combining current representations with cached temporal features to expose short-term temporal cues without using future observations. The fusion pathway is lightweight, adding only 0.17 million parameters and 0.84 ms of mean end-to-end latency overhead. ChronoFuse recovers 71% of the accuracy lost to latency on 1Mpx driving data and 90.8% under rapid drone motion on FRED, nearly restoring zero-delay performance. Under the extreme motion of EV-Flying, ChronoFuse reaches 20.95 sAP, compared with 2.25 for the strongest standard event detector (9.3x gain). These results show that predicting ahead can be critical for robots operating in fast-changing scenes, including autonomous driving, agile flight, and robotic interception.
関連論文
- WD-DETR: ウェーブレットノイズ除去で強化したイベントカメラ向けリアルタイム物体検出トランスフォーマイベントカメラ/物体検出
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