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- W4387074927 abstract "While LiDAR data acquisition is easy, labeling for semantic segmentation remains highly time consuming and must therefore be done selectively. Active learning (AL) provides a solution that can iteratively and intelligently label a dataset while retaining high performance and a low budget. In this work we explore AL for LiDAR semantic segmentation. As a human expert is a component of the pipeline, a practical framework must consider common labeling techniques such as sequential labeling that drastically improve annotation times. We therefore propose a discwise approach (DiAL), where in each iteration, we query the region a single frame covers on global coordinates, labeling all frames simultaneously. We then tackle the two major challenges that emerge with discwise AL. Firstly we devise a new acquisition function that takes 3D point density changes into consideration which arise due to location changes or ego-vehicle motion. Next we solve a mixed-integer linear program that provides a general solution to the selection of multiple frames while taking into consideration the possibilities of disc intersections. Finally we propose a semi-supervised learning approach to utilize all frames within our dataset and improve performance." @default.
- W4387074927 created "2023-09-27" @default.
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- W4387074927 date "2023-09-23" @default.
- W4387074927 modified "2023-10-17" @default.
- W4387074927 title "Discwise Active Learning for LiDAR Semantic Segmentation" @default.
- W4387074927 doi "https://doi.org/10.48550/arxiv.2309.13276" @default.
- W4387074927 hasPublicationYear "2023" @default.
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