Preprint
Aug 2026
GAP-SAM: A Global Artifact Prior for Generalizable AI-Generated Image Manipulation Localization
GAP-SAM encodes an image and its frozen VAE reconstruction into a global artifact token and injects it into SAM3's feature pyramid via zero-gated FiLM via zero-gated FiLM before pixel decoding to preserve localization while suppressing semantic-boundary shortcuts.
Haozhen Yan, Siyuan Shan, Zijian Yu et al.
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