DETR4D: Direct Multi-View 3D Object Detection with Sparse Attention

• URL: http://arxiv.org/abs/2212.07849v1
• Date: Thu, 15 Dec 2022 14:18:47 GMT
• Title: DETR4D: Direct Multi-View 3D Object Detection with Sparse Attention
• Authors: Zhipeng Luo, Changqing Zhou, Gongjie Zhang, Shijian Lu
• Abstract summary: 3D object detection with surround-view images is an essential task for autonomous driving. We propose DETR4D, a Transformer-based framework that explores sparse attention and direct feature query for 3D object detection in multi-view images.
• Score: 50.11672196146829
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 3D object detection with surround-view images is an essential task for autonomous driving. In this work, we propose DETR4D, a Transformer-based framework that explores sparse attention and direct feature query for 3D object detection in multi-view images. We design a novel projective cross-attention mechanism for query-image interaction to address the limitations of existing methods in terms of geometric cue exploitation and information loss for cross-view objects. In addition, we introduce a heatmap generation technique that bridges 3D and 2D spaces efficiently via query initialization. Furthermore, unlike the common practice of fusing intermediate spatial features for temporal aggregation, we provide a new perspective by introducing a novel hybrid approach that performs cross-frame fusion over past object queries and image features, enabling efficient and robust modeling of temporal information. Extensive experiments on the nuScenes dataset demonstrate the effectiveness and efficiency of the proposed DETR4D.

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