TFNet: Exploiting Temporal Cues for Fast and Accurate LiDAR Semantic Segmentation
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866917638636044288 |
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| author | Li, Rong Li, ShiJie Chen, Xieyuanli Ma, Teli Gall, Juergen Liang, Junwei |
| author_facet | Li, Rong Li, ShiJie Chen, Xieyuanli Ma, Teli Gall, Juergen Liang, Junwei |
| contents | LiDAR semantic segmentation plays a crucial role in enabling autonomous driving and robots to understand their surroundings accurately and robustly. A multitude of methods exist within this domain, including point-based, range-image-based, polar-coordinate-based, and hybrid strategies. Among these, range-image-based techniques have gained widespread adoption in practical applications due to their efficiency. However, they face a significant challenge known as the ``many-to-one'' problem caused by the range image's limited horizontal and vertical angular resolution. As a result, around 20% of the 3D points can be occluded. In this paper, we present TFNet, a range-image-based LiDAR semantic segmentation method that utilizes temporal information to address this issue. Specifically, we incorporate a temporal fusion layer to extract useful information from previous scans and integrate it with the current scan. We then design a max-voting-based post-processing technique to correct false predictions, particularly those caused by the ``many-to-one'' issue. We evaluated the approach on two benchmarks and demonstrated that the plug-in post-processing technique is generic and can be applied to various networks. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2309_07849 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | TFNet: Exploiting Temporal Cues for Fast and Accurate LiDAR Semantic Segmentation Li, Rong Li, ShiJie Chen, Xieyuanli Ma, Teli Gall, Juergen Liang, Junwei Computer Vision and Pattern Recognition LiDAR semantic segmentation plays a crucial role in enabling autonomous driving and robots to understand their surroundings accurately and robustly. A multitude of methods exist within this domain, including point-based, range-image-based, polar-coordinate-based, and hybrid strategies. Among these, range-image-based techniques have gained widespread adoption in practical applications due to their efficiency. However, they face a significant challenge known as the ``many-to-one'' problem caused by the range image's limited horizontal and vertical angular resolution. As a result, around 20% of the 3D points can be occluded. In this paper, we present TFNet, a range-image-based LiDAR semantic segmentation method that utilizes temporal information to address this issue. Specifically, we incorporate a temporal fusion layer to extract useful information from previous scans and integrate it with the current scan. We then design a max-voting-based post-processing technique to correct false predictions, particularly those caused by the ``many-to-one'' issue. We evaluated the approach on two benchmarks and demonstrated that the plug-in post-processing technique is generic and can be applied to various networks. |
| title | TFNet: Exploiting Temporal Cues for Fast and Accurate LiDAR Semantic Segmentation |
| topic | Computer Vision and Pattern Recognition |
| url | https://arxiv.org/abs/2309.07849 |