Prototype-oriented class-conditional clustering transport for unsupervised domain adaptation

Area of Science:

• Machine Learning
• Computer Vision

Background:

• Unsupervised Domain Adaptation (UDA) is crucial for machine learning models facing varied data distributions.
• Existing UDA methods often overlook internal data structures, limiting discriminative power.
• There is a need for UDA techniques that leverage within-domain semantic information.

Purpose of the Study:

• To introduce a novel UDA approach, Class-conditional clustering transport (CLUST), that addresses limitations of prior work.
• To improve UDA performance by incorporating clustering objectives and deep prototype learning.
• To enhance the reliability and diversity of probabilistic outputs in UDA.

Main Methods:

• CLUST employs class-conditional feature clustering and prototype clustering transport costs.
• The method maximizes informational entropy for diverse outputs and ensures semantic consistency.
• Deep prototype learning is utilized to foster intra-domain feature aggregation and align domain class structures.

Main Results:

• CLUST effectively reduces feature clustering transport costs and prototype clustering transport costs.
• The approach maintains consistent probability predictions for same-class samples, preserving semantic consistency.
• Theoretical analysis confirms the robustness and soundness of the CLUST architecture regarding generalization error bounds.

Conclusions:

• CLUST demonstrates state-of-the-art or comparable performance in diverse and challenging UDA scenarios.
• The method proves robust and practical for various UDA applications.
• CLUST offers a significant advancement in leveraging within-domain semantic structures for improved UDA.