ARKG: Adversarially Residual Knowledge Generalization to Open-Set Domain Adaptation

Area of Science:

• Computer Science
• Artificial Intelligence
• Machine Learning

Background:

• Open-set domain adaptation (OSDA) faces challenges with limited latent feature patterns and poor generalizability in low-density regions.
• This leads to misclassification of sensitive samples during direct alignment in OSDA tasks.

Purpose of the Study:

• To propose a novel strategy, Adversarial Residual Knowledge Generalization (ARKG), for effective open-set domain adaptation.
• To enhance the generalizability of representations and ensure boundary consistency for weighted domain alignment.

Main Methods:

• ARKG adversarially leverages residual knowledge at the pixel level for boundary consistency and resilient decision-making.
• An uncertainty-aware residual space (UARS) is generated using a deep residual network influenced by the target domain.
• Source-like images are generated using a VAE-GAN framework, and a weighting approach maximizes conditional mutual information.

Main Results:

• Extensive experiments on Office-31, Office-Home, DomainNet, and VisDA datasets demonstrate ARKG's superior performance.
• ARKG provides state-of-the-art insights in open-set domain adaptation.
• Hierarchical decisions at pixel and feature levels create a dynamic adversarial boundary between known and unknown data.

Conclusions:

• The proposed ARKG strategy effectively addresses limitations in existing OSDA methods.
• ARKG achieves superior performance by improving feature generalizability and robust classification of known and unknown data.