arXiv Computer Vision By Boheng Li, Yueming Xing, Yiming Li, Jie Zhang, Tianwei Zhang

LETHE: Defending against Unauthorized Image-to-Video Generation via Value Diversity Collapse

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LETHE is a new protection method that defends against unauthorized image‑to‑video generation by disrupting how diffusion models read a reference image. It achieves this by collapsing the spread of reference value vectors and attracting subsequent frames to these collapsed tokens, thereby severely degrading generated videos. Extensive experiments on modern I2V models and two human‑centric benchmarks show that LETHE outperforms existing protection techniques.

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