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    Format control in a character recognition system
    1.
    发明授权
    Format control in a character recognition system 失效
    字符识别系统中的格式控制

    公开(公告)号：US3553646A

    公开(公告)日：1971-01-05

    申请号：US3553646D

    申请日：1967-10-03

    Applicant: IBM

    Inventor： HARDIN WILLIAM W ,  TRAGLIA PATRICK J

    IPC: G06K9/20 ,  G06K7/015

    CPC classification number: G06K9/2054 ,  G06K9/20 ,  G06K9/32 ,  G06K2209/01

    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.

    Second order video clipper for optical character reader
    3.
    发明授权
    Second order video clipper for optical character reader 失效
    用于光学字符读取器的第二个订单视频剪辑

    公开(公告)号：US3586772A

    公开(公告)日：1971-06-22

    申请号：US3586772D

    申请日：1968-05-24

    Applicant: IBM

    Inventor： HARDIN WILLIAM W

    IPC: G06K9/38 ,  H04N1/00

    CPC classification number: G06K9/38 ,  G06K9/20 ,  G06K9/60 ,  G06K2209/01

    Abstract: An optical character reader providing output signals proportional to the lightness or blackness of the document being scanned generates a clipping level voltage which is not a fixed percentage of the peak black minus peak white signals. The clipping level percentage varies with the density, or blackness, of the character. The black and white peak signals are applied to a differentially connected operational amplifier having an output proportional to a first multiple times the black peak minus a second multiple times the white peak, where the first and second multiples are unequal. The output of the operational amplifier is added to a signal proportional to white background thereby providing a clipping level which is a variable percentage of the difference between a black and white peak signal.

    Supplementary scan lexical symbol identifier
    4.
    发明授权
    Supplementary scan lexical symbol identifier 失效
    补充扫描符号标识符

    公开(公告)号：US3585588A

    公开(公告)日：1971-06-15

    申请号：US3585588D

    申请日：1967-10-03

    Applicant: IBM

    Inventor： HARDIN WILLIAM W ,  HURLEY PATRICK J ,  TRAGLIA PATRICK J ,  NORMAN REINI J

    IPC: G06K9/50 ,  G06K9/10

    CPC classification number: G06K9/50 ,  G06K2209/01

    Abstract: After a curve follower lexical symbol recognition system has completed a character examination and found a conflict to exist, a supplementary scan of the character is initiated only for resolving the conflict. The scan traverses across the character at a horizontal and/or vertical level at which there is an identification number of crossovers for the particular conflict. The number of crossovers solves the conflict.

    Data consolidation system employing cell grouping with a plurality of scans within each cell
    5.
    发明授权
    Data consolidation system employing cell grouping with a plurality of scans within each cell 失效
    数据合并系统采用在每个单元内具有多个扫描的单元分组

    公开(公告)号：US3339177A

    公开(公告)日：1967-08-29

    申请号：US34127364

    申请日：1964-01-30

    Applicant: IBM

    Inventor： HARDIN WILLIAM W

    IPC: G06K9/60

    CPC classification number: G06K9/60 ,  G06K9/20 ,  G06K9/38

    Abstract: 1,039,779. Automatic character reading. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 23, 1964 [Jan. 30, 1964], No. 52302/64. Heading G4R. In pattern recognition apparatus signals representing each elemental area of the pattern are combined for groups of areas to produce result signals which are combined in turn to produce pattern representing signals. The pattern is scanned by a vertical line of horizontal strokes which is repeated a number of times as the pattern passes the sensing station. The scanner 5, Fig. 1 (not shown), is controlled by a generator 11 and pulses representing the start of each horizontal stroke pass to counters 28 and 26. The former gives an output at the end of each vertical line of strokes and the latter counts three strokes comprising a group or "cell." Corresponding outputs appear on three leads in turn and a fourth output 34 indicates the end of a cell. Photo-multiplier provides input signals for video amplifier 17. After clipping the video signal is applied to integrators 36, 40 and 44. Integrator 36, which is reset at the end of a cell sums the black sensed during those three strokes. If more than a certain value is reached before the end of cell signal 34 resets the integrator, bi-stable 38 is set to produce a signal indicating that the whole cell is to be considered black. Horizontal integrator 40 is reset either by the end of cell signal or by the trailing edge of a black signal. Short horizontal black areas encountered by the horizontal stroke do not set bi-stable 43. Longer areas do set the bi-stable. Contiguous areas starting in one scan and finishing in a later scan are integrated as a single area. Circuit 23 detects vertically placed areas, that is black areas of a given minimum length in each of the three strokes of the cell. The output of integrator 44 is applied by three And gates 48-50, one enabled in each stroke, to corresponding bi-stable circuits 57, 55, 51. If all become set And gate 53 gives an output. The three outputs obtained are each stored on a delay line in the form of a shift-register. Certain stages of the shift registers are gated together in selected combinations so that a cell shall be considered black if certain conditions prevail in that cell and in those above and below it or to one side of it. Examples of possible combinations are given.

    Coordinate transmission for character recognition systems
    6.
    发明授权
    Coordinate transmission for character recognition systems 失效
    字符识别系统的协调传输

    公开(公告)号：US3646584A

    公开(公告)日：1972-02-29

    申请号：US3646584D

    申请日：1969-11-14

    Applicant: IBM

    Inventor： HARDIN WILLIAM W ,  TRAGLIA PATRICK J

    IPC: G06K9/00 ,  G06K9/32 ,  G06K9/34 ,  G06K9/04

    CPC classification number: G06K9/32 ,  G06K2209/01

    Abstract: An optical character recognition system in which position data is detected by other than addressing a document field and is tagged on to a character identifying data byte. For documents in which the position of the character conveys information and for which the selected field to be scanned does not satisfactorily identify the character position, the scanning beam is tracked and converted into a position data byte when a character is detected. The position data byte is sent along with the character data byte to a utilization means.

    Area-format control in a character-recogniton system
    7.
    发明授权
    Area-format control in a character-recogniton system 失效
    字符识别系统中的区域格式控制

    公开(公告)号：US3571797A

    公开(公告)日：1971-03-23

    申请号：US3571797D

    申请日：1969-06-02

    Applicant: IBM

    Inventor： HARDIN WILLIAM W ,  TRAGLIA PATRICK J

    IPC: G06K9/32

    CPC classification number: G06K9/32 ,  G06K2209/01

    Abstract: Scan-control apparatus responsive to a format word specifying an outline of a document field to be scanned generates a series of search patterns for characters within the field. A ''''read'''' command causes a scanning beam to move in a line-search scan downwardly from one corner of the field. When black video is detected by this scan, a character-search scan moves the beam horizontally to establish the beginning of a character line. The first character found is normalized and a recognition scan is initiated. Reaching a selected format end-of-line boundary terminates the ''''read'''' command. Further ''''load-format'''' and ''''read'''' commands cause the beam to continue to search for and read character lines within the boundary. The field is terminated when the scanning beam attains a selected vertical boundary of the format word. A single field may contain a number of rectangular sections.

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