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OCR reads the words but doesn't guarantee correct data. How layout models, table detection, and verification turn messy business documents into trusted output.
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Business documents don't follow templates, so template-based parsers fail on them. OCR reads the words but can still lose the layout that gives a number its meaning. Break the pipeline into stages so each failure type is testable, and attach a source and confidence score to every extracted value. Then send only the uncertain ones to a human.