OCR Hinders RAG: Evaluating the Cascading Impact of OCR on
Retrieval-Augmented Generation
OCR Hinders RAG: Evaluating the Cascading Impact of OCR on
Retrieval-Augmented Generation
Retrieval-augmented Generation (RAG) enhances Large Language Models (LLMs) by integrating external knowledge to reduce hallucinations and incorporate up-to-date information without retraining. As an essential part of RAG, external knowledge bases are commonly built by extracting structured data from unstructured PDF documents using Optical Character Recognition (OCR). However, given the imperfect …