Preprint
Sep 2026
From Retrieval to Recognition:How Vision--Language Models Become OCR Specialists
Comparisons show that OCR specialization largely preserves head identity, retaining 17-20 of the top 20 heads per task with all-head rank correlations of 0.874-0.942, while redistributing their functional and causal strengths.
Yuan-Xiang Huangfu, Hanmeng Zhong, Linqing Chen et al.
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