CLoSeR: 長文ストリーミング再構成のためのループ閉じ込み
CLoSeR: Closing the Loop for Long-Context Streaming Reconstruction
ストリーミング3D再構成基盤モデルにループ閉じ込みを導入し、SE(3)多様体上で姿勢を最適化することで、キロメートル規模の長い系列でもドリフトを抑えて高精度な再構成を実現した。
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?
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著者: Moyang Li, Zihan Zhu, Wei Zhang, Marc Pollefeys, Daniel Barath
分類: cs.CV, cs.RO
原文アブストラクト
Feedforward foundation models have recently shown remarkable 3D reconstruction capabilities. However, existing models exhibit large tracking drift in long-context streaming reconstruction due to error accumulation. In this paper, we revisit loop closure with streaming reconstruction foundation models to enable accurate, drift-free, kilometer-scale reconstruction. Specifically, our method detects loop candidates through global descriptor retrieval, and constructs loop-conditioned windows to estimate the relative poses between looped frames. Given the observation that our adopted streaming reconstruction backbone produces a globally consistent scale, we optimize all frame poses on the SE(3) manifold with sequential and loop closure constraints, avoiding the pose graph optimization on the Sim(3) or higher-dimensional SL(4) manifolds employed in prior works. Extensive experiments show that our method reduces drift and produces consistent geometry on kilometer-scale sequences, significantly outperforming the state of the art. Code is available at https://github.com/MoyangLi00/CLoSeR.git.