Domain Adaptation in LiDAR Semantic Segmentation via Hybrid Learning with Alternating Skip Connections.
IV(2023)
Abstract
In this paper we address the challenging problem of domain adaptation in LiDAR semantic segmentation. We consider the setting where we have a fully-labeled data set from source domain and a target domain with a few labeled and many unlabeled examples. We propose a domain adaptation framework that mitigates the issue of domain shift and produces appealing performance on the target domain. To this end, we develop a GAN-based image-to-image translation engine that has generators with alternating connections, and couple it with a LiDAR semantic segmentation network. Our framework is hybrid in nature in the sense that our model learning is composed of self-supervision, semi-supervision and unsupervised learning. Extensive experiments on benchmark LiDAR semantic segmentation data sets demonstrate that our method achieves superior performance in comparison to state-of-the-art baselines and prior arts.
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Key words
lidar semantic segmentation,semantic segmentation,alternating skip connections,hybrid learning
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