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arXiv · 2506.00721

Common Inpainted Objects In-N-Out of Context

Tianze Yang·Tyson Jordan·Ruitong Sun·Ninghao Liu·Jin Sun
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Abstract

We present Common Inpainted Objects In-N-Out of Context (COinCO), a novel dataset addressing the scarcity of out-of-context examples in existing vision datasets. By systematically replacing objects in COCO images through diffusion-based inpainting, we create 97,722 unique images featuring both contextually coherent and inconsistent scenes, enabling effective context learning. Each inpainted object is meticulously verified and categorized as in- or out-of-context through Large Vision Language Model assessments. We demonstrate three key tasks enabled by COinCO: (1) a fine-grained context reasoning approach that classifies objects as in- or out-of-context based on three criteria; (2) a novel Objects-from-Context prediction task that determines which new objects naturally belong in given scenes at both instance and clique level semantics, and (3) context-enhanced fake detection on state-of-the-art methods without fine-tuning. COinCO provides a controlled testbed with contextual variations, establishing a foundation for advancing context-aware visual understanding in computer vision, including image forensics. Code and dataset are available at https://co-in-co.github.io/.

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Tianze Yang, Tyson Jordan, Ruitong Sun, Ninghao Liu, Jin Sun. 2025-05-31. Common Inpainted Objects In-N-Out of Context. https://arxiv.org/abs/2506.00721

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