MapTR: Structured Modeling and Learning for Online Vectorized HD Map Construction

• URL: http://arxiv.org/abs/2208.14437v1
• Date: Tue, 30 Aug 2022 17:55:59 GMT
• Title: MapTR: Structured Modeling and Learning for Online Vectorized HD Map Construction
• Authors: Bencheng Liao, Shaoyu Chen, Xinggang Wang, Tianheng Cheng, Qian Zhang, Wenyu Liu, Chang Huang
• Abstract summary: MapTR is a structured end-to-end framework for efficient online vectorized HD map construction. MapTR achieves the best performance and efficiency among existing vectorized map construction approaches.
• Score: 33.30177029735497
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: We present MapTR, a structured end-to-end framework for efficient online vectorized HD map construction. We propose a unified permutation-based modeling approach, i.e., modeling map element as a point set with a group of equivalent permutations, which avoids the definition ambiguity of map element and eases learning. We adopt a hierarchical query embedding scheme to flexibly encode structured map information and perform hierarchical bipartite matching for map element learning. MapTR achieves the best performance and efficiency among existing vectorized map construction approaches on nuScenes dataset. In particular, MapTR-nano runs at real-time inference speed ($25.1$ FPS) on RTX 3090, $8\times$ faster than the existing state-of-the-art camera-based method while achieving $3.3$ higher mAP. MapTR-tiny significantly outperforms the existing state-of-the-art multi-modality method by $13.5$ mAP while being faster. Qualitative results show that MapTR maintains stable and robust map construction quality in complex and various driving scenes. Abundant demos are available at \url{https://github.com/hustvl/MapTR} to prove the effectiveness in real-world scenarios. MapTR is of great application value in autonomous driving. Code will be released for facilitating further research and application.

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