论文标题
域通过centroid匹配和局部多种自我学习的域适应
Domain Adaptation by Class Centroid Matching and Local Manifold Self-Learning
论文作者
论文摘要
域的适应性一直是将知识从源域转移到目标域的基本技术。域适应的关键问题是如何以适当的方式减少两个域之间的分布差异,以便可以无动于衷地进行学习。在本文中,我们提出了一种新型的域适应方法,该方法可以彻底探索目标域的数据分布结构。特别是,我们考虑了整个目标域中同一群集中的样本,而不是个人而不是个人,并通过类Centroid匹配将伪标签分配给目标群集。此外,为了更彻底地利用目标数据的多种结构信息,我们进一步将局部多种自学策略引入了我们的建议中,以适应目标样本的固有局部连接性。有效的迭代优化算法旨在通过理论收敛保证来解决我们建议的目标函数。除了无监督的域适应性外,我们还以直接但优雅的方式将方法进一步扩展到了半监督的场景,包括同质和异质设置。在七个基准数据集上进行的广泛实验验证了我们提案在无监督和半监督的举止中的显着优势。
Domain adaptation has been a fundamental technology for transferring knowledge from a source domain to a target domain. The key issue of domain adaptation is how to reduce the distribution discrepancy between two domains in a proper way such that they can be treated indifferently for learning. In this paper, we propose a novel domain adaptation approach, which can thoroughly explore the data distribution structure of target domain.Specifically, we regard the samples within the same cluster in target domain as a whole rather than individuals and assigns pseudo-labels to the target cluster by class centroid matching. Besides, to exploit the manifold structure information of target data more thoroughly, we further introduce a local manifold self-learning strategy into our proposal to adaptively capture the inherent local connectivity of target samples. An efficient iterative optimization algorithm is designed to solve the objective function of our proposal with theoretical convergence guarantee. In addition to unsupervised domain adaptation, we further extend our method to the semi-supervised scenario including both homogeneous and heterogeneous settings in a direct but elegant way. Extensive experiments on seven benchmark datasets validate the significant superiority of our proposal in both unsupervised and semi-supervised manners.