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Ralf Römer

5 accepted papers

2026

From Demonstrations to Safe Deployment: Path-Consistent Safety Filtering for Diffusion Policies

ICRA 2026poster

Diffusion policies (DPs) achieve state-of-the-art performance on complex manipulation tasks by learning from large-scale demonstration datasets, often spanning multiple embodiments and environments. However, they cannot guarantee safe behavior, requiring external safety mechanisms. These, however, a…

2025

Failure Prediction at Runtime for Generative Robot Policies

NeurIPS 2025poster

Imitation learning (IL) with generative models, such as diffusion and flow matching, has enabled robots to perform complex, long-horizon tasks. However, distribution shifts from unseen environments or compounding action errors can still cause unpredictable and unsafe behavior, leading to task failur…

Cited by 26SourcecodeScholar
2025

Semantically Safe Robot Manipulation: From Semantic Scene Understanding to Motion Safeguards

RA-L 2025

Ensuring safe interactions in human-centric environments requires robots to understand and adhere to constraints recognized by humans as “common sense” (e.g., “<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">moving a cup of water above a laptop is un

Cited by 28SourceScholar
2023

Vision-Based Uncertainty-Aware Motion Planning Based on Probabilistic Semantic Segmentation

RA-L 2023

For safe operation, a robot must be able to avoid collisions in uncertain environments. Existing approaches for motion planning under uncertainties often assume parametric obstacle representations and Gaussian uncertainty, which can be inaccurate. While visual perception can deliver a more accurate

Cited by 8SourceScholar