arXiv: cs.AI preprintsInternational6 November 2026
AI-Generated Image Detectors Exploit Global Artifacts: Evidence from Inpainting Exchange
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arXiv:2602.00192v2 Announce Type: replace-cross Abstract: Modern diffusion-based inpainting enables realistic, localized image manipulation, raising critical challenges for reliable detection. We show that state-of-the-art AI-generated image detectors largely fail to identify \emph{what} was synthesized and instead exploit a \emph{global} artifact introduced as a side effect of the generation pipeline: latent-diffusion inpainting passes the entire image through a VAE encoder--decoder, inducing a subtle but pervasive spectral shift even in unedited regions. We turn this observation into a simpl
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