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Pre-Segmented Down-Sampling Accelerates Graph Neural Network-Based 3D Object Detection in Autonomous Driving
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DOI：10.3390/s24051458.png)
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摘要
En 中文
Graph neural networks (GNNs) have been proven to be an ideal approach to deal with irregular point clouds, but involve massive computations;
searching neighboring points in the graph, which limits their application in large-scale LiDAR point cloud processing. Down-sampling is a straight;
ward and indispensable step in current GNN-based 3D detectors to reduce the computational burden of the model, but the commonly used down-sampling methods cannot distinguish the categories of the LiDAR points, which leads to an inability to effectively improve the computational efficiency of the GNN models without affecting their detection accuracy. In this paper, we propose (1) a LiDAR point cloud pre-segmented down-sampling (PSD) method that can selectively reduce background points while preserving the;
eground object points during the process, greatly improving the computational efficiency of the model without affecting its 3D detection accuracy. (2) A lightweight GNN-based 3D detector that can extract point features and detect objects from the raw down-sampled LiDAR point cloud directly without any pre-trans;
mation. We test the proposed model on the KITTI 3D Object Detection Benchmark, and the results demonstrate its effectiveness and efficiency;
autonomous driving 3D object detection.
Keyword:
3D object detection
autonomous driving
LiDAR point cloud down-sampling
graph neural network
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3.5
论文数:
7.2W
被引数:
20.9W
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