  Semi-supervised domain adaptation aims to classify data belonging to a target
domain by utilizing a related label-rich source domain and very few labeled
examples of the target domain. Here, we propose a novel framework, Pred&Guide,
which leverages the inconsistency between the predicted and the actual class
labels of the few labeled target examples to effectively guide the domain
adaptation in a semi-supervised setting. Pred&Guide consists of three stages,
as follows (1) First, in order to treat all the target samples equally, we
perform unsupervised domain adaptation coupled with self-training; (2) Second
is the label prediction stage, where the current model is used to predict the
labels of the few labeled target examples, and (3) Finally, the correctness of
the label predictions are used to effectively weigh source examples class-wise
to better guide the domain adaptation process. Extensive experiments show that
the proposed Pred&Guide framework achieves state-of-the-art results for two
large-scale benchmark datasets, namely Office-Home and DomainNet.
