Maximizing Information in Domain-Invariant Representation Improves Transfer Learning

• URL: http://arxiv.org/abs/2306.00262v4
• Date: Mon, 16 Jun 2025 20:13:11 GMT
• Title: Maximizing Information in Domain-Invariant Representation Improves Transfer Learning
• Authors: Adrian Shuai Li, Elisa Bertino, Xuan-Hong Dang, Ankush Singla, Yuhai Tu, Mark N Wegman,
• Abstract summary: Domain adaptation (DA) technique involves decomposition of data representation into a domain-independent representation (DIRep) and a domain-dependent representation (DDRep)<n>Current DA algorithms, such as Domain-Separation Networks (DSN), do not adequately address this issue.<n>We develop a new algorithm wherein a stronger constraint is imposed to minimize the information content in DDRep to create a DIRep that retains relevant information about the target labels.
• Score: 10.716812429325984
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The most effective domain adaptation (DA) technique involves the decomposition of data representation into a domain-independent representation (DIRep) and a domain-dependent representation (DDRep). A classifier is trained by using the DIRep on the labeled source images. Since the DIRep is domain invariant, the classifier can be "transferred" to make predictions for the target domain with no (or few) labels. However, information useful for classification in the target domain can "hide" in the DDRep. Current DA algorithms, such as Domain-Separation Networks (DSN), do not adequately address this issue. DSN's weak constraint to enforce the orthogonality of DIRep and DDRep allows this hiding effect and can result in poor performance. To address this shortcoming, we develop a new algorithm wherein a stronger constraint is imposed to minimize the information content in DDRep to create a DIRep that retains relevant information about the target labels and, in turn, results in a better invariant representation. By using synthetic datasets, we show explicitly that depending on the initialization, DSN, with its weaker constraint, can lead to sub-optimal solutions with poorer DA performance. In contrast, our algorithm is robust against such perturbations. We demonstrate the equal-or-better performance of our approach against DSN and other recent DA methods by using several standard benchmark image datasets. We further highlight the compatibility of our algorithm with pre-trained models for classifying real-world images and showcase its adaptability and versatility through its application in network intrusion detection.

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