Learning to Generalize: Meta-Learning for Domain Generalization
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Abstract (arXiv)
Domain shift refers to the well known problem that a model trained in one source domain performs poorly when applied to a target domain with different statistics. {Domain Generalization} (DG) techniques attempt to alleviate this issue by producing models which by design generalize well to novel testing domains. We propose a novel {meta-learning} method for domain generalization. Rather than designing a specific model that is robust to domain shift as in most previous DG work, we propose a model agnostic training procedure for DG. Our algorithm simulates train/test domain shift during training by synthesizing virtual testing domains within each mini-batch. The meta-optimization objective requires that steps to improve training domain performance should also improve testing domain performance. This meta-learning procedure trains models with good generalization ability to novel domains. We evaluate our method and achieve state of the art results on a recent cross-domain image classification benchmark, as well demonstrating its potential on two classic reinforcement learning tasks.
Key facts. Cited by 762 papers in the map (data through 7 Oct 2026). First posted on arXiv 10 Oct 2017.
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Citing papers per year: 2021: 144; 2022: 157; 2023: 184; 2024: 129; 2025: 97; 2026: 51.
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- 2021Generalizing to Unseen Domains: A Survey on Domain Generalizationcited by 762
- 2021Domain Generalization: A Surveycited by 760
- 2021Domain Generalization with MixStylecited by 563
- 2021SWAD: Domain Generalization by Seeking Flat Minimacited by 431
- 2021Towards Out-Of-Distribution Generalization: A Surveycited by 431
- 2023Towards Stable Test-Time Adaptation in Dynamic Wild Worldcited by 409
- 2023A Comprehensive Survey on Test-Time Adaptation under Distribution Shiftscited by 353
- 2021A Fourier-based Framework for Domain Generalizationcited by 287
- 2021FedDG: Federated Domain Generalization on Medical Image Segmentation via Episodic Learning in Continuous Frequency Spacecited by 284
- 2021Gradient Matching for Domain Generalizationcited by 258
- 2021SMIL: Multimodal Learning with Severely Missing Modalitycited by 243
- 2021RobustNet: Improving Domain Generalization in Urban-Scene Segmentation via Instance Selective Whiteningcited by 213
38 more
- 2021SelfReg: Self-supervised Contrastive Regularization for Domain Generalizationcited by 189
- 2021Fishr: Invariant Gradient Variances for Out-of-Distribution Generalizationcited by 186
- 2023Robust Test-Time Adaptation in Dynamic Scenarioscited by 185
- 2021Learning to Diversify for Single Domain Generalizationcited by 170
- 2021FSDR: Frequency Space Domain Randomization for Domain Generalizationcited by 163
- 2021Deep Stable Learning for Out-Of-Distribution Generalizationcited by 153
- 2021Ensemble of Averages: Improving Model Selection and Boosting Performance in Domain Generalizationcited by 144
- 2022Causality Inspired Representation Learning for Domain Generalizationcited by 136
- 2022GAPartNet: Cross-Category Domain-Generalizable Object Perception and Manipulation via Generalizable and Actionable Partscited by 135
- 2022Domain Generalization by Mutual-Information Regularization with Pre-trained Modelscited by 133
- 2021Contrastive Behavioral Similarity Embeddings for Generalization in Reinforcement Learningcited by 123
- 2022Uncertainty Modeling for Out-of-Distribution Generalizationcited by 122
- 2022Exact Feature Distribution Matching for Arbitrary Style Transfer and Domain Generalizationcited by 122
- 2021Open Domain Generalization with Domain-Augmented Meta-Learningcited by 115
- 2023Diffusion Models for Image Restoration and Enhancement: A Comprehensive Surveycited by 108
- 2021Model-Based Domain Generalizationcited by 103
- 2022Animal Kingdom: A Large and Diverse Dataset for Animal Behavior Understandingcited by 102
- 2023Sharpness-Aware Gradient Matching for Domain Generalizationcited by 102
- 2024Orthogonal Subspace Decomposition for Generalizable AI-Generated Image Detectioncited by 102
- 2021Dual Contrastive Learning for General Face Forgery Detectioncited by 100
- 2023CLIPood: Generalizing CLIP to Out-of-Distributionscited by 96
- 2021Towards Principled Disentanglement for Domain Generalizationcited by 91
- 2023CLIP the Gap: A Single Domain Generalization Approach for Object Detectioncited by 87
- 2021OoD-Bench: Quantifying and Understanding Two Dimensions of Out-of-Distribution Generalizationcited by 86
- 2021Invariant Information Bottleneck for Domain Generalizationcited by 86
- 2021Exploiting Domain-Specific Features to Enhance Domain Generalizationcited by 86
- 2022NICO++: Towards Better Benchmarking for Domain Generalizationcited by 86
- 2022Sparse Mixture-of-Experts are Domain Generalizable Learnerscited by 85
- 2022Semantic-Aware Domain Generalized Segmentationcited by 78
- 2021Generalizable Person Re-identification with Relevance-aware Mixture of Expertscited by 77
- 2022Improving Test-Time Adaptation via Shift-agnostic Weight Regularization and Nearest Source Prototypescited by 67
- 2021Adaptive Methods for Real-World Domain Generalizationcited by 66
- 2022Probable Domain Generalization via Quantile Risk Minimizationcited by 66
- 2023Advances and Challenges in Meta-Learning: A Technical Reviewcited by 65
- 2021MixStyle Neural Networks for Domain Generalization and Adaptationcited by 64
- 2021Meta-Learning to Compositionally Generalizecited by 62
- 2021Domain Generalization via Gradient Surgerycited by 60
- 2023PromptStyler: Prompt-driven Style Generation for Source-free Domain Generalizationcited by 59
50 most cited of 762 All 762 (JSON)
- 2026COBICount: Separating Object and Background Responses for Remote Sensing Object Counting Without Training on Target Data30 Sep 2026
- 2026Domain Generalization under Sampling Pattern Shifts in Irregular Time Series27 Sep 2026
- 2026Transfer Learning for Evolving Domains11 Sep 2026
- 2026PAPT++: Risk-Aware Adversarial Tuning and Generation for Single Domain Generalization4 Sep 2026
- 2026Domain generalization and synthetic data in object detection: the enabler, the probe, and the gap2 Sep 2026
- 2026M2LG-DG: A Multi-modal Local-Global Domain Generalization Framework for Cross-site Major Depressive Disorder Classification31 Aug 2026
- 2026Learning Prostate Anatomy at Test Time for Cancer Detection in Micro-Ultrasound20 Aug 2026
- 2026PatchGen: Learning Soft Intra-Image Predictive Subsets for Visual Generalization13 Aug 2026
- 2026From Objectives to What Models Learn: A Landau Theory of Invariant Learning10 Aug 2026
- 2026Domain-Generalized Adaptive Semantic Communication for Collaborative Perception27 Jul 2026
- 2026Projection Pursuit CPCANet for Domain Generalization24 Jul 2026
- 2026A Step Towards Robust Unsupervised Domain Adaptation via Fine-Tuning and Reinforcement Learning3 Jul 2026
38 more
- 2026Assessing Distribution Shift in Human Activity Recognition for Domain Generalization23 Jun 2026
- 2026Exploring Dualistic Meta-Learning to Enhance Domain Generalization in Open Set Scenarios22 Jun 2026
- 2026Adversarial Domain Prompt Tuning and Generation for Single Domain Generalization19 Jun 2026
- 2026One-Step Generalization Ratio Guided Optimization for Domain Generalization15 Jun 2026
- 2026Towards Truly Multilingual ASR: Generalizing Code-Switching ASR to Unseen Language Pairs4 Jun 2026
- 2026MMDG-Bench: A Benchmark for Multimodal Domain Generalization30 May 2026
- 2026Cumulative Meta-Learning from Active Learning Queries for Robustness to Spurious Correlations20 May 2026
- 2026UniAlign: A Model-Agnostic Framework for Robust Network Traffic Classification under Distribution Shifts17 May 2026
- 2026FedStain: Modeling Higher-Order Stain Statistics for Federated Domain Generalization in Computational Pathology14 May 2026
- 2026DeconDTN-Toolkit: A Library for Evaluation and Enhancement of Robustness to Provenance Shift11 May 2026
- 2026Cross-Sample Relational Fusion: Unifying Domain Generalization and Class-Incremental Learning9 May 2026
- 2026Are We Making Progress in Multimodal Domain Generalization? A Comprehensive Benchmark Study7 May 2026
- 2026CPCANet: Deep Unfolding Common Principal Component Analysis for Domain Generalization6 May 2026
- 2026Generalized Category Discovery under Domain Shifts: From Vision to Vision-Language Models29 Apr 2026
- 2026Bridge: Basis-Driven Causal Inference Marries VFMs for Domain Generalization29 Apr 2026
- 2026PACO: Proxy-Task Alignment and Online Calibration for On-the-Fly Category Discovery13 Apr 2026
- 2026Radiology Report Generation for Low-Quality X-Ray Images11 Apr 2026
- 2026Bi-Level Optimization for Single Domain Generalization7 Apr 2026
- 2026FOCUS: Bridging Fine-Grained Recognition and Open-World Discovery across Domains15 Mar 2026
- 2026Learning through Creation: A Hash-Free Framework for On-the-Fly Category Discovery14 Mar 2026
- 2026TALON: Test-time Adaptive Learning for On-the-Fly Category Discovery9 Mar 2026
- 2026FedARKS: Federated Aggregation via Robust and Discriminative Knowledge Selection and Integration for Person Re-identification6 Mar 2026
- 2026Reasoning-Driven Multimodal LLM for Domain Generalization27 Feb 2026
- 2026Meta-FC: Meta-Learning with Feature Consistency for Robust and Generalizable Watermarking25 Feb 2026
- 2026Meta-Learning and Meta-Reinforcement Learning -- Tracing the Path towards DeepMind's Adaptive Agent23 Feb 2026
- 2026Stabilizing Test-Time Adaptation of High-Dimensional Simulation Surrogates via D-Optimal Statistics17 Feb 2026
- 2026Cross-view Domain Generalization via Geometric Consistency for LiDAR Semantic Segmentation16 Feb 2026
- 2026One-Shot Crowd Counting With Density Guidance For Scene Adaptation8 Feb 2026
- 2026HypCBC: Domain-Invariant Hyperbolic Cross-Branch Consistency for Generalizable Medical Image Analysis3 Feb 2026
- 2026Robust Domain Generalization under Divergent Marginal and Conditional Distributions2 Feb 2026
- 2026Negatives-Dominant Contrastive Learning for Generalization in Imbalanced Domains29 Jan 2026
- 2026DSP-Reg: Domain-Sensitive Parameter Regularization for Robust Domain Generalization27 Jan 2026
- 2026Implicit Non-Causal Factors are Out via Dataset Splitting for Domain Generalization Object Detection27 Jan 2026
- 2026Region-aware Spatiotemporal Modeling with Collaborative Domain Generalization for Cross-Subject EEG Emotion Recognition22 Jan 2026
- 2026SemAlign: Language Guided Semi-supervised Domain Generalization16 Jan 2026
- 2026Bipartite Mode Matching for Vision Training Set Search from a Hierarchical Data Server14 Jan 2026
- 2026Meta-learning to Address Data Shift in Time Series Classification13 Jan 2026
- 2026SAFE: Secure and Accurate Federated Learning for Privacy-Preserving Brain-Computer Interfaces9 Jan 2026
50 newest of 762 All 762 (JSON)
- 2023Leveraging Vision-Language Models for Improving Domain Generalization in Image Classificationcited by 41
- 2022Learning Domain Invariant Prompt for Vision-Language Modelscited by 35
- 2024Prompt Learning via Meta-Regularizationcited by 26
- 2023APPLeNet: Visual Attention Parameterized Prompt Learning for Few-Shot Remote Sensing Image Generalization using CLIPcited by 24
- 2024Soft Prompt Generation for Domain Generalizationcited by 24
- 2023Gradient-Regulated Meta-Prompt Learning for Generalizable Vision-Language Modelscited by 21
- 2024Enhancing Domain Adaptation through Prompt Gradient Alignmentcited by 8
- 2023C-SAW: Self-Supervised Prompt Learning for Image Generalization in Remote Sensingcited by 6
- 2025Generalizing vision-language models to novel domains: A comprehensive surveycited by 6
- 2025Approximate Domain Unlearning for Vision-Language Modelscited by 6
- 2024Adapting Large Multimodal Models to Distribution Shifts: The Role of In-Context Learningcited by 4
- 2025Generalizable Prompt Learning of CLIP: A Brief Overviewcited by 3
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- 2026Generalized Category Discovery under Domain Shifts: From Vision to Vision-Language Models29 Apr 2026
- 2025MetaTPT: Meta Test-time Prompt Tuning for Vision-Language Models13 Dec 2025
- 2025Generalizing Vision-Language Models with Dedicated Prompt Guidance2 Dec 2025
- 2025Approximate Domain Unlearning for Vision-Language Models9 Oct 2025
- 2025CoDoL: Conditional Domain Prompt Learning for Out-of-Distribution Generalization18 Sep 2025
- 2025Multimodal Causal-Driven Representation Learning for Generalizable Medical Image Segmentation7 Aug 2025
- 2025Generalizing vision-language models to novel domains: A comprehensive survey23 Jun 2025
- 2025FrogDogNet: Fourier frequency Retained visual prompt Output Guidance for Domain Generalization of CLIP in Remote Sensing23 Apr 2025
- 2025Generalizable Prompt Learning of CLIP: A Brief Overview3 Mar 2025
- 2024Enhancing Domain Adaptation through Prompt Gradient Alignment13 Jun 2024
- 2024Adapting Large Multimodal Models to Distribution Shifts: The Role of In-Context Learning20 May 2024
- 2024Soft Prompt Generation for Domain Generalization30 Apr 2024
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- 2023Diffusion Models for Image Restoration and Enhancement: A Comprehensive Surveycited by 108
- 2024FDS: Feedback-guided Domain Synthesis with Multi-Source Conditional Diffusion Models for Domain Generalizationcited by 5
- 2023Improving the Effectiveness of Deep Generative Datacited by 4
- 2026Adversarial Domain Prompt Tuning and Generation for Single Domain Generalizationcited by 4
- 2025Exploring Probabilistic Modeling Beyond Domain Generalization for Semantic Segmentationcited by 3
- 2023Meta ControlNet: Enhancing Task Adaptation via Meta Learningcited by 1
- 2024Structure-Aware Stylized Image Synthesis for Robust Medical Image Segmentationcited by 0
- 2026PAPT++: Risk-Aware Adversarial Tuning and Generation for Single Domain Generalizationcited by 0
- 2026PAPT++: Risk-Aware Adversarial Tuning and Generation for Single Domain Generalization4 Sep 2026
- 2026Adversarial Domain Prompt Tuning and Generation for Single Domain Generalization19 Jun 2026
- 2025Exploring Probabilistic Modeling Beyond Domain Generalization for Semantic Segmentation28 Jul 2025
- 2024Structure-Aware Stylized Image Synthesis for Robust Medical Image Segmentation5 Dec 2024
- 2024FDS: Feedback-guided Domain Synthesis with Multi-Source Conditional Diffusion Models for Domain Generalization4 Jul 2024
- 2023Meta ControlNet: Enhancing Task Adaptation via Meta Learning3 Dec 2023
- 2023Improving the Effectiveness of Deep Generative Data7 Nov 2023
- 2023Diffusion Models for Image Restoration and Enhancement: A Comprehensive Survey18 Aug 2023
- 2022Sparse Mixture-of-Experts are Domain Generalizable Learnerscited by 85
- 2021Generalizable Person Re-identification with Relevance-aware Mixture of Expertscited by 77
- 2022Meta-DMoE: Adapting to Domain Shift by Meta-Distillation from Mixture-of-Expertscited by 50
- 2024MoE-FFD: Mixture of Experts for Generalized and Parameter-Efficient Face Forgery Detectioncited by 27
- 2021Mimic Embedding via Adaptive Aggregation: Learning Generalizable Person Re-identificationcited by 19
- 2022HMOE: Hypernetwork-based Mixture of Experts for Domain Generalizationcited by 8
- 2025Token-Level Prompt Mixture with Parameter-Free Routing for Federated Domain Generalizationcited by 0
- 2025Token-Level Prompt Mixture with Parameter-Free Routing for Federated Domain Generalization29 Apr 2025
- 2024MoE-FFD: Mixture of Experts for Generalized and Parameter-Efficient Face Forgery Detection12 Apr 2024
- 2022HMOE: Hypernetwork-based Mixture of Experts for Domain Generalization15 Nov 2022
- 2022Meta-DMoE: Adapting to Domain Shift by Meta-Distillation from Mixture-of-Experts8 Oct 2022
- 2022Sparse Mixture-of-Experts are Domain Generalizable Learners8 Jun 2022
- 2021Mimic Embedding via Adaptive Aggregation: Learning Generalizable Person Re-identification16 Dec 2021
- 2021Generalizable Person Re-identification with Relevance-aware Mixture of Experts19 May 2021
- 2024Out-of-Distribution Learning with Human Feedback14 Aug 2024
- 2024Generalizing Reward Modeling for Out-of-Distribution Preference Learning22 Feb 2024
- 2026Reasoning-Driven Multimodal LLM for Domain Generalization27 Feb 2026
- 2021Generalizing to Unseen Domains: A Survey on Domain Generalizationcited by 762
- 2021Domain Generalization: A Surveycited by 760
- 2021Domain Generalization with MixStylecited by 563
- 2021SWAD: Domain Generalization by Seeking Flat Minimacited by 431
- 2021Towards Out-Of-Distribution Generalization: A Surveycited by 431
- 2023Towards Stable Test-Time Adaptation in Dynamic Wild Worldcited by 409
- 2023A Comprehensive Survey on Test-Time Adaptation under Distribution Shiftscited by 353
- 2021A Fourier-based Framework for Domain Generalizationcited by 287
- 2021FedDG: Federated Domain Generalization on Medical Image Segmentation via Episodic Learning in Continuous Frequency Spacecited by 284
- 2021Gradient Matching for Domain Generalizationcited by 258
- 2021SMIL: Multimodal Learning with Severely Missing Modalitycited by 243
- 2021RobustNet: Improving Domain Generalization in Urban-Scene Segmentation via Instance Selective Whiteningcited by 213
12 most cited of 723 All 723 (JSON)
- 2026COBICount: Separating Object and Background Responses for Remote Sensing Object Counting Without Training on Target Data30 Sep 2026
- 2026Domain Generalization under Sampling Pattern Shifts in Irregular Time Series27 Sep 2026
- 2026Transfer Learning for Evolving Domains11 Sep 2026
- 2026Domain generalization and synthetic data in object detection: the enabler, the probe, and the gap2 Sep 2026
- 2026M2LG-DG: A Multi-modal Local-Global Domain Generalization Framework for Cross-site Major Depressive Disorder Classification31 Aug 2026
- 2026Learning Prostate Anatomy at Test Time for Cancer Detection in Micro-Ultrasound20 Aug 2026
- 2026PatchGen: Learning Soft Intra-Image Predictive Subsets for Visual Generalization13 Aug 2026
- 2026From Objectives to What Models Learn: A Landau Theory of Invariant Learning10 Aug 2026
- 2026Domain-Generalized Adaptive Semantic Communication for Collaborative Perception27 Jul 2026
- 2026Projection Pursuit CPCANet for Domain Generalization24 Jul 2026
- 2026A Step Towards Robust Unsupervised Domain Adaptation via Fine-Tuning and Reinforcement Learning3 Jul 2026
- 2026Assessing Distribution Shift in Human Activity Recognition for Domain Generalization23 Jun 2026
12 newest of 723 All 723 (JSON)