HyperMODEST: Self-Supervised 3D Object Detection with Confidence Score Filtering

• URL: http://arxiv.org/abs/2304.14446v2
• Date: Thu, 1 Jun 2023 20:18:56 GMT
• Title: HyperMODEST: Self-Supervised 3D Object Detection with Confidence Score Filtering
• Authors: Jenny Xu and Steven L. Waslander
• Abstract summary: Current LiDAR-based 3D object detectors for autonomous driving are almost entirely trained on human-annotated data. MODEST is the first work to train 3D object detectors without any labels. We propose a universal method that can largely accelerate the self-training process and does not require tuning on a specific dataset.
• Score: 9.14477900515147
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Current LiDAR-based 3D object detectors for autonomous driving are almost entirely trained on human-annotated data collected in specific geographical domains with specific sensor setups, making it difficult to adapt to a different domain. MODEST is the first work to train 3D object detectors without any labels. Our work, HyperMODEST, proposes a universal method implemented on top of MODEST that can largely accelerate the self-training process and does not require tuning on a specific dataset. We filter intermediate pseudo-labels used for data augmentation with low confidence scores. On the nuScenes dataset, we observe a significant improvement of 1.6% in AP BEV in 0-80m range at IoU=0.25 and an improvement of 1.7% in AP BEV in 0-80m range at IoU=0.5 while only using one-fifth of the training time in the original approach by MODEST. On the Lyft dataset, we also observe an improvement over the baseline during the first round of iterative self-training. We explore the trade-off between high precision and high recall in the early stage of the self-training process by comparing our proposed method with two other score filtering methods: confidence score filtering for pseudo-labels with and without static label retention. The code and models of this work are available at https://github.com/TRAILab/HyperMODEST

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