Beyond Blind Compliance: Benchmarking Task Verification in OCR Reasoning

Yue Zhou, Yuan Wu, Yi Chang


Abstract
Multimodal Large Language Models (MLLMs) have achieved strong performance on OCR-centric document understanding and text-rich visual reasoning benchmarks. Yet existing evaluations largely assume that every task is valid and answerable. In real-world OCR scenarios, this assumption often fails: questions may rely on illegible text, occluded evidence, nonexistent visual targets, contradictory premises, or missing variables. We study this reliability gap as OCR-grounded Task Verification: before answering, a model should determine whether the Image Premise (IP), Textual Premise (TP), and Question (Q) jointly define an executable task. We introduce VeriOCRBench, a 1,800-sample human-verified benchmark built from source images drawn from 8 OCR-related datasets and spanning 8 real-world image domains, with controlled, image-grounded diagnostic tasks. It contains 1,600 trap-injected invalid tasks across 8 trap types and four verification dimensions—Visual, Contextual, Factual, and Logical—plus 200 trap-free controls for measuring over-refusal. Built with a Visual Atomic Fact (VAF)-anchored pipeline and full human auditing, VeriOCRBench enables decoupled evaluation of task verification, root-cause diagnosis, and over-refusal. Evaluating 15 leading MLLMs reveals persistent blind compliance, diagnosis failures, and prompt-induced over-refusal, exposing a critical reliability gap in current OCR reasoning systems. The code is available at: https://github.com/zy001122/Beyond-Blind-Compliance.
Anthology ID:
2026.emnlp-main.959
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
22122–22155
Language:
URL:
https://aclanthology.org/2026.emnlp-main.959/
DOI:
Bibkey:
Cite (ACL):
Yue Zhou, Yuan Wu, and Yi Chang. 2026. Beyond Blind Compliance: Benchmarking Task Verification in OCR Reasoning. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 22122–22155, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Beyond Blind Compliance: Benchmarking Task Verification in OCR Reasoning (Zhou et al., EMNLP 2026)
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PDF:
https://aclanthology.org/2026.emnlp-main.959.pdf