Author

Hanwei Zhu

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#computer vision Preprint Oct 2026

Of Chains and Gains: What Reinforcement Learning changes on Reasoning-based Image Quality Assessment

Reinforcement Learning with Verifiable Rewards (RLVR) has improved the performance of large Vision-Language Models (VLMs) on image quality assessment (IQA). Existing approaches often attribute these gains to improved reasoning before scoring, supported by increasingly plausible Chain-of-Thought (CoT). However, whether...

Yi-Xuan Li, Yuxuan Jiang, Han-Wei Zhu et al. · 0 citations

Preprint Aug 2026

CertVLA: Certified Defense against Physical Visual Attacks for Vision-Language-Action Models

Vision-Language-Action (VLA) policies are vulnerable to localized physical perturbations, yet existing certified patch defenses target discrete labels and cannot directly certify continuous, temporally correlated actions. We introduce CertVLA, a certified defense for closed-loop VLA control under bounded patch and text...

Hui Lu, Zhi-Jie Peng, Yuqi Lin et al. · 0 citations