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Collin Leiber

3 accepted papers

2026

CHB: A Diagnostic Toolkit for Hardness-Aware Clustering Evaluation

ICML 2026poster

Clustering is commonly compared through leaderboards that collapse performance into a single aggregate ranking. Such summaries obscure why methods succeed, which data properties align with failure, and how conclusions shift under representation changes and realistic tuning constraints. We present CH…

Cited by 0SourceScholar
2025

Anomaly Detection by an Ensemble of Random Pairs of Hyperspheres

NeurIPS 2025poster

Anomaly detection is a crucial task in data mining, focusing on identifying data points that deviate significantly from the main patterns in the data. This paper introduces Anomaly Detection by an Ensemble of Random Pairs of Hyperspheres (ADERH), a new isolation-based technique leveraging two key ob…

Cited by 0SourceScholar
2025

Breaking the Reclustering Barrier in Centroid-based Deep Clustering

ICLR 2025poster

This work investigates an important phenomenon in centroid-based deep clustering (DC) algorithms: Performance quickly saturates after a period of rapid early gains. Practitioners commonly address early saturation with periodic reclustering, which we demonstrate to be insufficient to address performa…