Author

Yu Chen

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Preprint Oct 2026

ScenePercept: Scenario-Conditioned Perceptual Assessment of Real-World User-Generated Content Images

The rapid development of mobile imaging and social platforms has led to explosive growth in user-generated content images, making their systematic and comprehensive perceptual assessment increasingly important. Existing image perception benchmarks are typically task-oriented, curating specific scenarios for quality or...

Shu-Han Xia, Yu Chen, Xiang Wang et al. · 0 citations

Preprint Aug 2026

One Ranking, Any Budget: Matryoshka Evidence-to-Context Frame Selection for Long-Video Understanding

Matryoshka Evidence-to-Context (MEC) Frame Selection is introduced, a training-free framework that builds a reusable sparse video index, discovers candidates through sparse probing and local zooming, and greedily constructs a position-adaptive ranking - early positions emphasize evidence; later positions progressively...

Wang Chen, Yu Chen, Xiang Wang et al. · 1 citation · ⚡1

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