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CRAG-MM-Diagnostics: Enabling Stage-Wise Analysis of Knowledge-Intensive VQA

Research Multimodal & Generative

Merged summary

TL;DR - CRAG-MM-Diagnostics is a stage-wise benchmark for diagnosing failures in knowledge-intensive visual question answering. It identifies retrieval and reasoning as the main bottleneck and shows that grounding objects before retrieval can substantially improve accuracy.

  • Separately evaluates visual grounding, object identification, and knowledge retrieval/reasoning.
  • Adds diagnostic metadata including target regions, entity names, and visual complexity scores.
  • Finds object identification weaknesses and difficulty incorporating textual cues into image retrieval.
  • A grounded bimodal RAG pipeline improves GPT-5 and Qwen accuracy by 13.3 and 8.5 percentage points, respectively.

Sources (1)

CRAG-MM-Diagnostics: Enabling Stage-Wise Analysis of Knowledge-Intensive VQA

arXiv cs.CV Hanseok Oh, Parishad BehnamGhader, Benno Krojer, Hyunji Lee, Paul Liang, Siva Reddy, Verna Dankers 2026-07-23 arXiv:2607.21155

TL;DR - CRAG-MM-Diagnostics is a stage-wise benchmark for diagnosing failures in knowledge-intensive visual question answering. It identifies retrieval and reasoning as the main bottleneck and shows that grounding objects before retrieval can substantially improve accuracy.

  • Separately evaluates visual grounding, object identification, and knowledge retrieval/reasoning.
  • Adds diagnostic metadata including target regions, entity names, and visual complexity scores.
  • Finds object identification weaknesses and difficulty incorporating textual cues into image retrieval.
  • A grounded bimodal RAG pipeline improves GPT-5 and Qwen accuracy by 13.3 and 8.5 percentage points, respectively.
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