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About this paper
Weikai Li, Songcan Chen
Intra-Domain Structure Preserving (IDSP), a framework developed by researchers at Nanjing University of Aeronautics and Astronautics, addresses Partial Domain Adaptation by prioritizing model smoothness within the target domain over cross-domain alignment. This approach yielded state-of-the-art accuracy on Office-Home and Office-31 benchmarks, demonstrating that domain alignment can be detrimental in PDA while being complementary in standard UDA.
Key insights
- Theoretical analysis derived a generalization error bound showing target risk depends on source risk, model smoothness, and domain discrepancy, justifying a focus on smoothness when alignment is problematic.
- Preserving only the intra-domain structure of the target is essential in PDA, as incorporating source or cross-domain structures can lead to negative transfer.
- Domain alignment, the standard approach in UDA, is empirically detrimental in PDA but can be complementary in closed-set UDA, offering a nuanced view on its utility.
Summary by alphaXiv.
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