Author

Yu-ching Kao

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Preprint Sep 2026

NOVA: Normal-Side Modeling for Training-Free Zero-Shot Video Anomaly Detection

NOVA is proposed, a training-free ZS-VAD framework that strengthens the normal side at both linguistic and visual levels, and introduces Normality-Aware Prompt Construction (NA), which excludes anomaly-adjacent verbs and biases normal descriptions toward static, low-motion scenes.

Wei-Chih Yin, Yu-ching Kao, Cheng-Kuan Lin et al. · 0 citations