Data Party THU

Nov 1, 2026 · Artificial Intelligence

Long-Document VQA Survey: Why Local Relevance Isn't Sufficient Evidence

This survey analyzes 150+ papers on long-document visual question answering, decomposing systems into parsing, evidence retrieval, generation, and evaluation components, revealing how research focus shifted from content understanding to sufficient evidence acquisition and cross-turn evidence management, with the key insight that local relevance doesn't guarantee sufficient evidence.