Author

Yu Chen

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Preprint Aug 2026

Credit the Right Box: Marginal Contribution Assignment for Structured Visual Perception

This work proposes MCR-GRPO, a marginal contribution assignment framework that derives box-level credit directly from each sampled response, preserving GRPO's response-level comparison while enabling box-aware optimization of structured multi-object grounding.

Xinheng Han, Jianfeng Wang, Yu Chen et al. · 0 citations