Author

Ivan Viola

3 papers indexed here

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Preprint Oct 2026

Query-Time Calibration of CLIP Features for Open-Vocabulary 3D Segmentation

Lifting vision-language features such as CLIP into 3D Gaussian reconstructions enables open-vocabulary segmentation through natural-language queries. Although CLIP represents a broad range of semantic concepts, the lifted features of individual scenes can exhibit strong directional concentration, while raw cosine simil...

D. Engel, Yousef Rajeh, Leon Sick et al. · 0 citations

Preprint Sep 2026

NormLift: From Lifted Features To Semantic Reliability In 3D Gaussian Splatting

Experiments on open-vocabulary 3D semantic segmentation show that NormLift is an efficient, training-free framework that achieves strong performance across evaluation protocols.

Yi-Han Zang, Da Li, D. Engel et al. · 1 citation

Jul 2026

Hybrid Advantage Estimation with Unified Critic for VLM Agentic Reinforcement Learning

This work proposes HyGAE, an actor-critic framework that jointly optimizes token- and turn-level objectives with the hybrid advantage and unified critic and provides an in-depth analysis showing that the exact analytic form of the hybrid advantage and return is crucial for optimization.

Wen-Xuan Zhang, Yu-Hui Wang, Donggang Jia et al. · arXiv.org · 0 citations