2021

Domain Generalization: A Survey

Zhou, Kaiyang, Liu, Ziwei, Qiao, Yu et al.

Understand

Generalization to out-of-distribution (OOD) data is a capability natural to humans yet challenging for machines to reproduce.

  • This is because most learning algorithms strongly rely on the i.i.d.~assumption on source/target data, which is often violated in practice due to domain shift.
  • Domain generalization (DG) aims to achieve OOD generalization by using only source data for model learning.
  • Over the last ten years, research in DG has made great progress, leading to a broad spectrum of methodologies, e.g., those based on domain alignment, meta-learning, data augmentation, or ensemble learning, to name a few; DG has also been studied in various application areas including computer vision, speech recognition, natural language processing, medical imaging, and reinforcement learning.

Reading the bibliography…