Applications 315 Unsupervised DA 227 Theory 70 Open Set DA 64 Other Transfer Learning Paradigms 55 Universal DA 54 Benchmarks 51 Multi Source DA 32 Source Free DA 24 Semi-supervised DA 17 Survey 15 Partial DA 15 Zero-shot DA 9 Few-shot DA 8 Incremental DA 8 Active DA 7 Open Compound DA 3 Target-agnostic DA 3 Model Selection 3 Weakly-Supervised DA 3 Multi Target DA 3 Multi Step DA 3 Few-shot UDA 3 Heterogeneous DA 2 One-shot DA 2 Federated DA 1 Foundation-Models based DA 1 Continuously Indexed DA 1 Generalized Domain Adaptation 1 Explainable 1

Other Methods 354 Others 144 Semantic Segmentation 100 Adversarial Methods 96 Object Detection 64 Domain Generalization 45 Person Re-identification 27 Optimal Transport 16 Video Domain Adaptation 15 Distance-based Methods 14 Medical Related 8 Self-training-Based Methods 8 3D 5 LiDAR 4 Domain Randomization 2 Self-Supervised Methods 2 Knowledge Transfer 2 Monocular Depth Estimation 2 Remote Sensing 1 Fine-Grained Domain 1 Semi-Supervised-Learning-Based Methods 1 Transformer-based Methods 1 Transfer Metric Learning 1 Incremental Methods 1 Information-based Methods 1