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Calibrated and Efficient Sampling-Free Confidence Estimation for LiDAR Scene Semantic Segmentation

2024-11-18 · Hanieh Shojaei Miandashti, Qianqian Zou, Claus Brenner

Reliable deep learning models require not only accurate predictions but also well-calibrated confidence estimates to ensure dependable uncertainty estimation. This is crucial in safety-critical applications like autonomous driving, which depend on rapid and precise semantic segmentation of LiDAR point clouds for real-time 3D scene understanding. In this work, we introduce a sampling-free approach for estimating well-calibrated confidence values for classification tasks, achieving alignment with true classification accuracy and significantly reducing inference time compared to sampling-based methods. Our evaluation using the Adaptive Calibration Error (ACE) metric for LiDAR semantic segmentation shows that our approach maintains well-calibrated confidence values while achieving increased processing speed compared to a sampling baseline. Additionally, reliability diagrams reveal that our method produces underconfidence rather than overconfident predictions, an advantage for safety-critical applications. Our sampling-free approach offers well-calibrated and time-efficient predictions for LiDAR scene semantic segmentation.

📄 PDF Abstract BibTeX arXiv:2411.11935

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Tasks

Autonomous DrivingLIDAR Semantic SegmentationScene UnderstandingSegmentationSemantic Segmentation

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