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OCR actually does the reading OCR or optical character recognition is the technology used to distinguish printed or handwritten text within digital images of physical documents OCR is most commonly used to turn hardcopy legal or historic documents in the PDFs an OCR system analyzes an image and identifies dark areas as characters that need to be recognized enabling digital archiving editing and document searching with common programs like Microsoft Word or Google Docs characters are recognized with one of two algorithms pattern recognition when OCR programs are fed examples of text and various fonts and formats to compare and recognize characters in a document or feature detection when OCR programs apply rules about letter and number features like lines curves angles in order to recognize characters for instance the letter A might be recognized as two diagonal lines connected by a horizontal line across the middle OCR is also used for archiving newspapers and phone books mobile app ch