OH

Karlsruhe University of Applied Sciences, Intelligent Systems Research Group

Research staff / Machine learning / Uncertainty

Oliver Hennhöfer

I focus on ML systems that make uncertainty explicit, especially through conformal inference.

Blog

From Scores to Decisions

A short note on turning anomaly scores into calibrated evidence and keeping the decision layer inspectable.

  • conformal inference
  • anomaly detection
  • online FDR

All posts

Research Focus

My work sits at the intersection of inferential statistics and applied machine learning.

  • Uncertainty Quantification. Conformal inference methods for trustworthy decision-making.
  • Anomaly Detection. Unsupervised methods for identifying rare patterns in ill-posed settings.

Projects

nonconform

Python package for calibrated anomaly detection and decision-aware conformal inference methods.

online-fdr

Online false discovery rate and sequential decision-control methods for hypothesis testing streams.

aberrant

Anomaly detection experiments and streaming workflows for reproducible baseline comparisons.

Publications

2026

  1. Between Resolution Collapse and Variance Inflation: Weighted Conformal Anomaly Detection in Low-Data Regimes
    O Hennhöfer, C Preisach, arXiv preprint arXiv:2603.23205 (2026).
  2. Conformal Anomaly Detection in Python: Moving Beyond Heuristic Thresholds with 'nonconform'
    O Hennhöfer, M Kirsch, C Preisach, arXiv preprint arXiv:2605.13642 (2026).

2025

  1. Interdisciplinary Harmonies: A Story-Driven Course on AI and Music to Increase Interest in Computer Science
    K Marquardt, Q Shang, O Hennhöfer, L Happe, Proceedings of the 6th European Conference on Software Engineering Education (2025).

2024

  1. Leave-One-Out-, Bootstrap- and Cross-Conformal Anomaly Detectors
    O Hennhöfer, C Preisach, IEEE International Conference on Knowledge Graph (ICKG) 15 (1), 110 - 119 (2024).

2021

  1. Multidimensional Exploratory Spatial Data Analysis
    O Hennhöfer, J Bruns, P Ullrich, A Heiß, G Sharipov, D Paraforos, GI_Forum 2021, 9, 136-151 (2021).

2020

  1. Anomaly Detection in Precision Agriculture with R
    O Hennhöfer, Karlsruhe University of Applied Sciences, 2020.