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OPEN: Object-wise Position Embedding for Multi-view 3D Object Detection

Jinghua Hou <sup>1</sup>, Tong Wang <sup>2</sup>, Xiaoqing Ye <sup>2</sup>, Zhe Liu <sup>1</sup>, Shi Gong <sup>2</sup>, Xiao Tan <sup>2</sup>,<br> Errui Ding <sup>2</sup>, Jingdong Wang <sup>2</sup>, Xiang Bai <sup>1,āœ‰</sup> <br> <sup>1</sup> Huazhong University of Science and Technology, <sup>2</sup> Baidu Inc. <br> āœ‰ Corresponding author. <br>

ECCV 2024

arXiv

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Abstract Accurate depth information is crucial for enhancing the performance of multi-view 3D object detection. Despite the success of some existing multi-view 3D detectors utilizing pixel-wise depth supervision, they overlook two significant phenomena: 1) the depth supervision obtained from LiDAR points is usually distributed on the surface of the object, which is not so friendly to existing DETR-based 3D detectors due to the lack of the depth of 3D object center; 2) for distant objects, fine-grained depth estimation of the whole object is more challenging. Therefore, we argue that the object-wise depth (or 3D center of the object) is essential for accurate detection. In this paper, we propose a new multi-view 3D object detector named OPEN, whose main idea is to effectively inject object-wise depth information into the network through our proposed object-wise position embedding. Specifically, we first employ an object-wise depth encoder, which takes the pixel-wise depth map as a prior, to accurately estimate the object-wise depth. Then, we utilize the proposed object-wise position embedding to encode the object-wise depth information into the transformer decoder, thereby producing 3D object-aware features for final detection. Extensive experiments verify the effectiveness of our proposed method. Furthermore, OPEN achieves a new state-of-the-art performance with 64.4% NDS and 56.7% mAP on the nuScenes test benchmark.

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Results

ModelBackbonePretrainResolutionNDSmAPConfigDownload
OPENV2-99DD3D320 x 80061.352.1configmodel
OPENR50nuImage256 x 70456.547.0configmodel
OPENR101nuImage512 x 140860.651.9configmodel
ModelBackbonePretrainResolutionNDSmAPConfigDownload
OPENV2-99DD3D640 x 160064.456.7configmodel

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Citation

@inproceedings{
  hou2024open,
  title={OPEN: Object-wise Position Embedding for Multi-view 3D Object Detection},
  author={Hou, Jinghua and Wang, Tong and Ye, Xiaoqing and Liu, Zhe and Tan, Xiao and Ding, Errui and Wang, Jingdong and Bai, Xiang},
  booktitle={ECCV},
  year={2024},
}

Acknowledgements

We thank these great works and open-source repositories: 3DPPE, StreamPETR, and MMDetection3D.