Learning models on one labeled dataset that generalize well on another domain is a difficult task, as several shifts might happen between the data domains. This is notably the case for lidar data, for which models can exhibit large performance discrepancies due for instance to different lidar patterns or changes in acquisition conditions. This paper addresses the corresponding Unsupervised Domain Adaptation (UDA) task for semantic segmentation. To mitigate this problem, we introduce an unsupervised auxiliary task of learning an implicit underlying surface representation simultaneously on source and target data. As both domains share the same latent representation, the model is forced to accommodate discrepancies between the two sources of data. This novel strategy differs from classical minimization of statistical divergences or lidar-specific state-of-the-art domain adaptation techniques. Our experiments demonstrate that our method achieves a better performance than the current state of the art in synthetic-to-real and real-to-real scenarios.

本文介绍了一种无监督领域自适应的方法，使用隐式表面表示同时在源数据和目标数据上进行学习的辅助任务来缓解不同激光雷达模式或获取条件变化等原因导致的性能差异，实验证明了该方法比现有技术在合成到真实和真实到真实的情况下均取得了更好的性能。

SALUDA: 基于表面的汽车激光雷达无监督领域自适应