A practical way to compare OCR engines on a large multilingual book archive: sample the real page types, measure text and reading order separately, preserve the source, and route each page to the workflow that actually wins.
Tag: local RAG
Before You Index 17,000 Research PDFs, Test the Collection
A practical integrity test for scientific PDF collections: identify versions, audit extraction, preserve page-level provenance, measure retrieval, and build the knowledge graph only after the evidence is stable.