A method and device for reading and recognizing an unknown character on a document, the device measuring the character's waveform amplitude along timed intervals and determining that each measurement is within a predetermined acceptable amplitude range at each interval for an ideal character. If all...http://www.google.fr/patents/US4827531?utm_source=gb-gplus-shareBrevet US4827531 - Method and device for reading a document character
Method and device for reading a document character