MeshBind: 非剛体シーン流の自動アノテーションのための点-メッシュバインディング
MeshBind: Point-to-Mesh Binding for Non-Rigid Scene Flow Automatic Annotation
メッシュモデルを用いて歩行者などの非剛体物体の点ごとのシーン流を自動生成するアノテーション手法を提案し、大規模ベンチマークSFBを公開した。
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著者: Yinqi Chen, E Li, Shuaijun Wang, Weiyuan Peng, Meiying Zhang, Qi Hao
分類: cs.CV
原文アブストラクト
Scene flow estimation is essential for many autonomous driving (AD) and robotic applications, but obtaining ground-truth scene flow for non-rigid objects such as pedestrians is highly difficult. We present MeshBind, an automatic annotation method that uses mesh models to generate per-point scene flow for non-rigid objects. The novelty of this work is threefold: 1) developing a multi-view module that reconstructs an articulated mesh model from six surround cameras and registers it to the LiDAR frame; 2) developing a local-frame binding technique that attaches each point to the mesh via a per-triangle tangent-normal frame, invariant under rigid motion yet adaptive to articulated deformation; 3) developing a three-layer flow registration pipeline that combines ego-vehicle motion compensation, box binding, and mesh binding to produce full-scene per-point flow. We implement MeshBind in SF-Studio, an interactive annotation tool that visualises flow and allows human mesh corrections with automatic recomputation. We also release SFB (SUScape-Flow Benchmark), a large-scale benchmark built on the public SUScape dataset, covering 41k frames with per-point non-rigid pedestrian annotations and a Rigid/Semi-Rigid/Non-Rigid evaluation protocol. Experiments show that fine-tuning on SFB reduces three-way endpoint error (EPE) by 2-3x, and brings non-rigid EPE to the same level as rigid EPE.