Format control in a character recognition system

Abstract

Abstract A CHARACTER RECOGNITION SYSTEM IS COMPLETELY CONTROLLED BY A DIGITAL CONTROL WORD FROM A COMPUTER. THE CONTROL WORD CONTAINS START AND END OF FIELD ADDRESSES PLUS RECOGNITION METHOD CODES, A CALIBRATION COMMAND, A CHARACTER FIELD ORIENTATION COMMAND, A CORRECTION COMMAND, A NUMERIC OR ALPHABETIC RECOGNITION COMMAND AND A BLANK AREA COMMAND. ALL OF THIS INFORMATION IN THE CONTROL WORD FROM THE COMPUTER PERMITS GREAT VERSITILITY IN OPERATION OF A CHARACTER RECOGNITION SYSTEM. THE VERSATILITY IS ACHIEVED BY THE FACT THAT THE FORMAT OF SCANNING IN THE CHARACTER RECOGNITION SYSTEM CAN BE COMPLETELY ALTERED AS TO AREA OF ACAN AND TYPE OF RECOGNITION BY A DIGITAL CONTROL WORD FROM THE COMPUTER. BY CHANGING THE COMPUTER PROGRAM, THE FORMAT OF THE CHARACTER RECOGNITION SYSTEM IS CHANGED. IN OPERATION, THE START AND END OF FIELD ADDRESSES IN THE CONTROL WARD FROM TEH COMPUTER ARE CONVERTED TO ANALOG SIGNALS BY DIGITAL TO ANALOG CONVERTERS FOR USE IN THE SCANNING CIRCUITRY OF THE CHARACTER RECOGNITION SYSTEM. THE RECOGNITION MODE AS CODED IN THE CONTROL WORD IS DECODED BY LOGIC. THE LOGIC THEN SIGNAL THE SCANNING SYSTEM AND THE RECOGNITION LOGIC THE TYPE OF SCAN PATTERN AND RECOGNITION TO BE USED IN ANALYZING THE CHARACTER FIELD TO BE SCANNED. ANOTHER PART OF TEH CONTROL WORD IS DECODED TO SIGNAL THE RECOGNITION CIRCUITS WHETHER TO LOOK FOR ALPHABETIC OR NUMERIC CHARACTERS. STILL ANOTHER PART OF THE CONTROL WORD IS DECODED TO SIGNAL THE RECOGNITION CIRCUITS TO LOOK FOR LARGE BLANK AREAS BETWEEN CHARACTERS SCANNED. ANOTHER PORTION OF THE CONTROL WORD IS USED TO INDICATE TO THE SCANNING CIRCUITS THE ORIENTATION OF THE CHARACTER FIELD TO BE SCANNED. FINALLY, A LAST PORTION OF WHETHER TO SELECT ON-LINE OR OFF-LINE CORRECTION WHEN REJECT CHARACTERS ARE INDICATED.

Inventors

• 👤 William W Hardin
• 👤 Patrick J Traglia

Bibliographic Details