Character recognition method and apparatus
First Claim
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7. A CHARACTER RECOGNIZING APPARATUS FOR SCANNING A LINE OF TEXT TO RECOGNIZED CHARACTERS THEREON COMPRISING:
- A FLYING SPOT SCANNER FOR SCANNING WITH SCANNING LINES A LINE OF TEXT, SAID FLYING SPOT SCANNER BEING OPERABLE IN EITHER A SEARCH MODE AND A SCAN MODE;
SCANNER CONTROL MEANS COUPLE TO SAID ENERGIZING SAID FLYING SPOT SCANNER TO SCAN SAID LINE OF TEXT IN A SEARCH MODE WHEREBY SAID LINE OF TEXT IS SCANNED BY SCANNING LINES SPACED APART BY A DISTANCE SUBSTANTIALLY EQUAL TO ONE-HALF THE LINES WIDTHS OF THE CHAARACTERS COMPRISING SAID LINE OF TEXT, THE LENGTH OF SAID SCANNING LINES BEING SUBSTANTIALLY EQUAL TO ONE AND ONE-HALF TIMES THE MAXIMUM HEIGHT OF THE CHARACTERS, MODE CONTROL MEANS IN SAID SCANNER CONTROL MEANS ENERGIZED BY VIDEO SIGNALS WHICH EXCEED A FIRST THRESHOLD LEVEL PRODUCED BY A FIRST SCANNING LINE BEING MODULATED BY THE DETAIL OF THE LEADING EDGE OF A FIRST CHARACTER FOR SWITCHING SAID FLYING SPOT SCANNER TO SCAN SAID LINE OF TEXT IN A SCAN MODE WHEREBY SAID LINE OF TEXT WITH SAID CHARACTER THEREON ARE SCANNED BY A SERIES OF SCANNING LINES SUFFICIENT IN NUMBER TO SCAN THE ENTIRE FIRST CHARACTER, THE SCANNING LINES BEING SPACED APART BY A DISTANCE SUBSTANTIALLY EQUAL TO ONE AND ONE-HALF THE LINE WIDTHS OF THE CHARACTERS COMPRISING SAID LINE OF TEXT, THE LENGTH OF SAID SCANNING LINES BEING SUBSTANTIALLY EQUAL TO ONE SAID ONEHALF TIMES THE MAXIMUM HEIGHT OF THE CHARACTERS;
GENERATING MEANS RESPONSIVE TO THE SCANNING LINES SCANNING SAID FIRST CHARACTER FOR GENERATING DIGITAL PROFILING FUNCTIONS OF SAID FIRST CHARACTER WHICH REPRESENT THE RELATIVE DISTANCES FROMS THE BEGINNING AND ENDS OF SAID SCANNING LINES WITHIN SAID SERIES TO THE FIRST AND AND LAST INTERSECTIONS OF SAID SCANNING LINES WITH SAID CHARACTER, SID GENERATING MEANS INCLUDING;
MEANS FOR GENERATING DIGITAL INTERNAL STRUCTURE FUNCTIONS WHICH REPRESENT THE NUMBER OF CROSSINGS OF THE SERIES OF SAID SCANNING LINES OVER SAID FIRST CHARACTER AND MEANS FOR GENERATING A CHARACTER SPACING FUNCTIONS REPRESENTING THE SPACING BETWEEN CROSSINGS OF A SELECTED SCANNING LINE OVER SAID FIRST CHARACTER;
STORING MEANS FOR STORING DIGITAL PROFILING, INTERNAL STRUCTURE AND CHARACTER SPACING FUNCTIONS OF KNOWN CHARACTERS;
AND MEANS INCLUDED IN A STORING MEANS AND COUPLED TO SAID GENERATING MEANS FOR ENERGIZING SAID STORING MEANS WITH THE FUNCTIONS GENERATED BY SCANNING SAID FIRST CHARACTER TO COMPARE THEM WITH THE STORED FUNCTIONS THEREIN, TO PRODUCE AN OUTPUT SIGNAL REPRESENTING SAID FIRST CHARACTER.
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7 Claims
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7. A CHARACTER RECOGNIZING APPARATUS FOR SCANNING A LINE OF TEXT TO RECOGNIZED CHARACTERS THEREON COMPRISING:
- A FLYING SPOT SCANNER FOR SCANNING WITH SCANNING LINES A LINE OF TEXT, SAID FLYING SPOT SCANNER BEING OPERABLE IN EITHER A SEARCH MODE AND A SCAN MODE;
SCANNER CONTROL MEANS COUPLE TO SAID ENERGIZING SAID FLYING SPOT SCANNER TO SCAN SAID LINE OF TEXT IN A SEARCH MODE WHEREBY SAID LINE OF TEXT IS SCANNED BY SCANNING LINES SPACED APART BY A DISTANCE SUBSTANTIALLY EQUAL TO ONE-HALF THE LINES WIDTHS OF THE CHAARACTERS COMPRISING SAID LINE OF TEXT, THE LENGTH OF SAID SCANNING LINES BEING SUBSTANTIALLY EQUAL TO ONE AND ONE-HALF TIMES THE MAXIMUM HEIGHT OF THE CHARACTERS, MODE CONTROL MEANS IN SAID SCANNER CONTROL MEANS ENERGIZED BY VIDEO SIGNALS WHICH EXCEED A FIRST THRESHOLD LEVEL PRODUCED BY A FIRST SCANNING LINE BEING MODULATED BY THE DETAIL OF THE LEADING EDGE OF A FIRST CHARACTER FOR SWITCHING SAID FLYING SPOT SCANNER TO SCAN SAID LINE OF TEXT IN A SCAN MODE WHEREBY SAID LINE OF TEXT WITH SAID CHARACTER THEREON ARE SCANNED BY A SERIES OF SCANNING LINES SUFFICIENT IN NUMBER TO SCAN THE ENTIRE FIRST CHARACTER, THE SCANNING LINES BEING SPACED APART BY A DISTANCE SUBSTANTIALLY EQUAL TO ONE AND ONE-HALF THE LINE WIDTHS OF THE CHARACTERS COMPRISING SAID LINE OF TEXT, THE LENGTH OF SAID SCANNING LINES BEING SUBSTANTIALLY EQUAL TO ONE SAID ONEHALF TIMES THE MAXIMUM HEIGHT OF THE CHARACTERS;
GENERATING MEANS RESPONSIVE TO THE SCANNING LINES SCANNING SAID FIRST CHARACTER FOR GENERATING DIGITAL PROFILING FUNCTIONS OF SAID FIRST CHARACTER WHICH REPRESENT THE RELATIVE DISTANCES FROMS THE BEGINNING AND ENDS OF SAID SCANNING LINES WITHIN SAID SERIES TO THE FIRST AND AND LAST INTERSECTIONS OF SAID SCANNING LINES WITH SAID CHARACTER, SID GENERATING MEANS INCLUDING;
MEANS FOR GENERATING DIGITAL INTERNAL STRUCTURE FUNCTIONS WHICH REPRESENT THE NUMBER OF CROSSINGS OF THE SERIES OF SAID SCANNING LINES OVER SAID FIRST CHARACTER AND MEANS FOR GENERATING A CHARACTER SPACING FUNCTIONS REPRESENTING THE SPACING BETWEEN CROSSINGS OF A SELECTED SCANNING LINE OVER SAID FIRST CHARACTER;
STORING MEANS FOR STORING DIGITAL PROFILING, INTERNAL STRUCTURE AND CHARACTER SPACING FUNCTIONS OF KNOWN CHARACTERS;
AND MEANS INCLUDED IN A STORING MEANS AND COUPLED TO SAID GENERATING MEANS FOR ENERGIZING SAID STORING MEANS WITH THE FUNCTIONS GENERATED BY SCANNING SAID FIRST CHARACTER TO COMPARE THEM WITH THE STORED FUNCTIONS THEREIN, TO PRODUCE AN OUTPUT SIGNAL REPRESENTING SAID FIRST CHARACTER.
- A FLYING SPOT SCANNER FOR SCANNING WITH SCANNING LINES A LINE OF TEXT, SAID FLYING SPOT SCANNER BEING OPERABLE IN EITHER A SEARCH MODE AND A SCAN MODE;
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Current AssigneeEaton Corp. (Wisconsin) (Eaton Corporation PLC.)
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Original AssigneeSergei M. Fomenko
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InventorsFomenko, Sergei M.
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Application NumberUS04/417,749Time in Patent Office1,033 DaysField of SearchUS Class Current382/193CPC Class CodesG06V 30/10 Character recognitionG06V 30/184 by analysing segments inter...
