Often used with a scanner, an OCR analysis software and breaks an image into symbols and then reconstructs a text after identifying each of the symbols.
Among these programs, some are even able to recreate the structure of a document having a layout developed to then allow a direct use in a word processor.
ABBYY FineReader Professional (Evaluation)
Scanning with editable text conversion.
Convert scanned images into editable text.
ReadIris Pro (Commercial)
Convert paper documents in color or black and white in digital format while retaining their layout.