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Graph Alignment via Dual-Pass Spectral Encoding and Latent Space Communication

Created by
  • Haebom

Author

Maysam Behmanesh, Erkan Turan, Maks Ovsjanikov

Outline

This paper addresses the graph alignment problem of identifying corresponding nodes in multiple graphs. Existing unsupervised learning-based methods embed node features into latent representations to perform cross-graph comparisons without ground truth correspondence. However, they suffer from reduced node independence due to excessive smoothing of GNN-based embeddings and latent space inconsistency caused by structural noise, feature heterogeneity, and learning instability. In this paper, we propose a novel graph alignment framework that enhances node independence and enhances geometric consistency across latent spaces. A double-pass encoder combining low- and high-pass spectral filters is used to generate structure-aware, high-dimensionally discriminative embeddings. A geometry-aware feature map module is integrated to learn bijective and equidistant transformations between graph embeddings, ensuring consistent geometric relationships between different representations. Comprehensive evaluations on vision-language benchmarks using various pretrained models demonstrate that the proposed framework generalizes beyond the graph domain, enabling alignment of vision and language representations using unsupervised learning.

Takeaways, Limitations

Takeaways:
We present a novel graph alignment framework that simultaneously addresses the oversmoothing problem and latent space mismatch problem of GNN-based embeddings.
Generating structure-aware and high-dimensionally distinct embeddings using a double-pass encoder leveraging low- and high-pass filters.
Ensuring geometric consistency between latent spaces through the geometric recognition feature map module.
We demonstrate that it can be effectively applied to vision-language representation alignment beyond the graph domain.
It shows superior performance compared to existing unsupervised graph alignment methods.
Limitations:
Lack of detailed analysis of the computational complexity and efficiency of the method presented in this paper.
Further validation of generalization performance for various graph structures and features is needed.
Potential performance degradation for certain types of graphs or features.
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