Detecting Out-of-Distribution Data with Semi-supervised Graph “Feature" Networks

Debargha Ganguly, Debayan Gupta

Abstract: Anomalous and out-of-distribution (OOD) data present a significant challenge to the robustness of decisions taken by deep neural networks, with myriad real-world consequences. State-of-the-art OOD detection techniques use embeddings learned by large pre-trained transformers. We demonstrate that graph structures and topological properties can be leveraged to detect both far-OOD and near-OOD data reliably, simply by characterising each data point (image) as a network of related features (visual concepts). Furthermore, we facilitate human-in-the-loop machine learning by expressing this data to comprise high-level domain-specific concepts. We obtained \textit{97.95\% AUROC} on far-OOD and \textit{98.79\% AUROC} on near-OOD detection tasks based on the LSUN dataset (comparable to the performance of state-of-the-art techniques).

Anonymous Url: I certify that there is no URL (e.g., github page) that could be used to find authors’ identity.

No Acknowledgement Section: I certify that there is no acknowledgement section in this submission for double blind review.

Code Of Ethics: I acknowledge that I and all co-authors of this work have read and commit to adhering to the ICLR Code of Ethics

Submission Guidelines: Yes

Please Choose The Closest Area That Your Submission Falls Into: Deep Learning and representational learning