Cycle-Sync: サイクル一貫性同期によるロバストな大域カメラ姿勢推定
Cycle-Sync: Robust Global Camera Pose Estimation through Enhanced Cycle-Consistent Synchronization
カメラの回転と位置を大域的に推定するフレームワークCycle-Syncを提案し、サイクル一貫性を強調したメッセージパッシング最小二乗法により、バンドル調整不要で高精度な姿勢推定を実現した。
詳しい要約
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著者: Shaohan Li, Yunpeng Shi, Gilad Lerman
分類: cs.CV, cs.NA, cs.RO, math.NA, stat.ME
原文アブストラクト
We introduce Cycle-Sync, a robust and global framework for estimating camera poses (both rotations and locations). Our core innovation is a location solver that adapts message-passing least squares (MPLS) -- originally developed for group synchronization -- to camera location estimation. We modify MPLS to emphasize cycle-consistent information, redefine cycle consistencies using estimated distances from previous iterations, and incorporate a Welsch-type robust loss. We establish the strongest known deterministic exact-recovery guarantee for camera location estimation, showing that cycle consistency alone -- without access to inter-camera distances -- suffices to achieve the lowest sample complexity currently known. To further enhance robustness, we introduce a plug-and-play outlier rejection module inspired by robust subspace recovery, and we fully integrate cycle consistency into MPLS for rotation synchronization. Our global approach avoids the need for bundle adjustment. Experiments on synthetic and real datasets show that Cycle-Sync consistently outperforms leading pose estimators, including full structure-from-motion pipelines with bundle adjustment.
