arXiv AI By Zhiqiang Wu, Shuang Sun, Jiale Zhang, Jing Li, Yibo Chen, Xu Tang, Yao Hu

DeCoRL: Decomposed Consistency Reinforcement Learning for Multi-Image Composition

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DeCoRL is a reinforcement‑learning framework designed to enhance multi‑image composition (MICo) by decomposing overall consistency into object‑level consistency. It first establishes instruction‑relevant object correspondences across reference images and localizes these regions in the generated image. A VLM‑based reward model, trained on single‑object consistency annotations, provides fine‑grained, object‑wise feedback that is aggregated into a multi‑object consistency reward to guide RL post‑training. The authors also introduce DeCo‑Bench, a benchmark covering compositions from 2 to 6 reference images, and show consistent improvements on both DeCo‑Bench and the public MICo‑Bench.

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arXiv Computer Vision
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arXiv Computer Vision
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