JP3025152B2 - Handwritten character recognition input device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handwritten character recognition input device such as a word processor having a display-integrated tablet, a personal computer capable of processing documents, a workstation, a portable terminal, and an electronic notebook. The present invention relates to a handwritten character recognition input device that inputs handwritten characters on a screen using an input frame for inputting characters.

[0002]

2. Description of the Related Art A handwritten character input word processor for inputting characters is conventionally known as this type of handwritten character recognition input device. This is provided with a display-integrated tablet comprising a transparent digitizer provided on the screen of the display unit, and a pen for inputting coordinates on the display-integrated tablet. When handwritten characters are sequentially input by a pen into a character frame (input frame) provided in a lattice pattern on the entire display unit, the handwritten characters are recognized by the recognition unit under the control of the processor. When an editing key such as correction, deletion, insertion, or kana-kanji conversion is operated on the recognition result, an editing process is performed, and the result is displayed on the display unit in place of handwritten characters. However, since a grid-like input frame for inputting on the entire screen of the display unit is displayed, characters written with a pen in this input frame are difficult to read because they are handwritten characters, and the recognition characters (recognition results) There is also a disadvantage that it is difficult to read (printed characters) due to the grid-like input frame.

A cursor is displayed at an input position on the display unit, and input of handwritten characters is performed in an input frame displayed at a position irrelevant to the cursor, and an input end key is pressed when the input is completed. In some cases, a character written in the frame is recognized, and a type character as a recognition result is displayed in front of the cursor. However, since the already input characters and the cursor are separated from the input frame for inputting characters, it is difficult to connect sentences and it is not easy to confirm the already input characters. There was a problem that it was not possible. This becomes more remarkable as the display screen becomes larger and the number of displayed characters increases.

[0004] Therefore, as a conventional technique which solves the above problem, an input frame for handwritten characters is provided near the display of a recognized character, and the input frame is sequentially moved when the character is recognized. (Japanese Patent Laid-Open No. 4-347721).
Reference).

[0005] As another conventional technique, if it is determined that the pointing position of the pen is outside the character frame (input frame) and a character is displayed in the input frame, the character is edited. If the pointing position of the pen is outside the input box and no characters are displayed in the input box, the input box is moved to the pointing position of the pen. Japanese Patent Application Laid-Open Nos. 1-137318 and 1-1-318 have proposed a handwritten character recognition input device using an automatic input frame in which editing such as kana-kanji conversion or the like can be performed only by an operation, and an arbitrary character can be input. 1
No. 37319).

Further, as another conventional technique, the size of a handwritten character input first in a free format and the character size, and the input direction and the input interval between a first character and a second character subsequently input by handwriting are determined. There has been proposed a text input device that automatically sets a format by determining horizontal / vertical writing and character spacing, and displays an input frame for handwriting input based on the character size and character spacing of the set format (Japanese Patent Laid-Open No. Sho 62). -15
9291).

[0007]

However, in JP-A-1-137318 and JP-A-137319, the input frame is located on the right side of the character input position. You can input as if you were writing in a text box, but since the input frame is set to be almost the same size as printed characters, it will be difficult to input as handwritten characters, and the character recognition rate will decrease depending on the size of the input frame, It could not be said that sentences could be created efficiently.

In Japanese Patent Application Laid-Open No. 4-347721, the character input frame is large compared to the printed characters, so that it is easy to input as handwritten characters. However, since it is not to the right of the input characters, it is as if written on paper. I could not say that I did handwriting input.

In Japanese Patent Laid-Open Publication No. Sho 62-159291, the format can be set at the time of writing a sentence by first and second characters freely input in a free format. In this case, it is difficult to input a handwritten character in the input frame. Therefore, it is difficult to input a handwritten character, and the character recognition rate is reduced.

[0010] Further, JP-A-1-137318, JP-A-137319, and JP-A-4-347721 have the following problem. (1) Even if the pen is kept up for a certain period of time, it is not considered that the handwriting input is finished, so that the user has to give an instruction to end the handwriting input by some method, and the operation is complicated. (2) Since the size of the input frame cannot be adjusted, handwriting input cannot be performed according to the user's preference. When the number of character areas to be input is reduced, it becomes impossible to input handwritten characters. (3) Since the configuration is not such that it can be corrected when the character input start position is incorrect, the operation for correction is very inconvenient.
For example, a method has been adopted in which the input of the character is temporarily terminated with an error, the character is exited from the handwriting input mode, the incorrect character is erased by another character erasing means, and the operation returns to the handwriting input mode.

The present invention has been made in view of the above circumstances, and by selecting and displaying an input frame having a size suitable for handwriting input immediately adjacent to an already-input character according to the user's preference, Provided is a handwritten character recognition input device that realizes writing of handwritten input with a pen as if writing on paper, and has a function of automatically ending by pen operation and an input position correction function, thereby improving user operability. Is what you do.

[0012]

FIG. 1 is a block diagram showing the basic configuration of the present invention. In the figure, the present invention has a pen 101 for inputting handwritten characters and a tablet 102a integrally formed on a screen, and forms a plurality of character recognition input frames when handwritten characters are drawn on the tablet by the pen. Display means 102 for displaying and sequentially displaying handwritten characters and recognized characters input to the input box; detecting the up / down signal of the pen and detecting the handwritten characters input to the input box as coordinate data composed of dots And a coordinate data storage means 10 for storing detected coordinate data.
And a character recognition table 105 in which various coordinate data and recognition characters based on a predetermined format are stored in advance.
A character recognition unit 106 for converting coordinate data input by referring to the character recognition table 105 into a corresponding recognized character and outputting it to a screen;
When inputting handwritten characters using the tablet 1 and the tablet 102, a frame control for arranging a plurality of input frames formed in a size larger than the recognized characters to be output on the screen along the same row / column as the recognized characters. Means 107 when the handwriting character corresponding to one input frame is converted into a recognized character by the character recognizing means 106.
Numeral 7 is a handwritten character recognition input device which erases an input frame corresponding to the recognized character and additionally displays an input frame of the same size next to an already displayed input frame.

According to the above-described configuration, when inputting a document with handwritten characters, when writing of a character at a position desired to be input by the pen 101 is started on the tablet 102a in contact with the display screen of the display device 102, the frame control unit 107 A plurality of input frames formed larger than the recognition character are displayed at the position, and a handwritten character can be input. At this time, the handwritten character input to the input frame is detected by the coordinate detection means 103 as coordinate data composed of dots, and is stored in the coordinate data storage means 104. Here, when the handwriting input of the first character by the pen 101 is completed and the writing of the second character starts in the next input frame, the character recognizing means 106 refers to the character recognition table 105 and the handwriting of the first character is performed. Convert characters to recognized characters and display them. Next, the frame control unit 107 deletes the input frame corresponding to the first character, and sequentially adds and displays input frames of the same shape next to the already displayed input frames. Accordingly, an input frame having a size suitable for handwriting input is displayed one after another next to the input characters, so that handwriting input as if writing on paper can be realized.

If the apparatus further comprises a timer 108 for receiving the pen up / down signal from the coordinate detecting means 103 and counting the pen up time, the frame control means 107 will allow the pen 101 to move up / down. Based on the signal, it is determined whether or not a character has been input in the next input frame after the pen 101 has input a character, and it is determined that the input of the character has been completed when the measured pen-up time exceeds a predetermined time. Can be configured to delete all of the input frames that are displayed. Therefore, if the pen is up for a certain period of time, it is automatically regarded as the end of handwriting input,
There is no need to instruct the end of handwriting input, and user operability is improved.

If the apparatus further comprises a frame size table 109 for storing the plurality of input frames in correspondence with numbers / symbols for each size and a size selection instructing means 110, the frame control means 107 can perform size selection. Indicating means 110
Thus, a function of changing the size of the input frame to a plurality of types can be provided. Therefore, the size of the input frame can be changed according to the user's preference.

A dot counting means 111 for counting the number of dots of the coordinate data outputted from the coordinate detecting means 103 when a handwritten character is inputted into the input frame by the pen 101, and a dot when the pen 101 is raised It is determined whether or not the number of dots counted by the counting means 111 has reached a reference value. If the number of dots has not reached the reference value, coordinate data control for invalidating the coordinate data of the input handwritten character is performed. It is preferable that the configuration further includes the means 112. According to the above configuration, when the character input start position erroneously lowers the pen 101, if the number of dots counted by the dot counting unit 111 is equal to or smaller than the reference value, the coordinate data control unit 112 determines that the dot is invalid. The pen can be rewritten by lowering the pen at a predetermined position in the input frame. Therefore, even if the pen is once dropped to an incorrect position, it can be easily corrected and rewritten by raising it.

In the present invention, the pen 101 is used as a pointing device in combination with the tablet 102a. As the display device 102, LC
A D (liquid crystal display) device, a CRT display device, an EL display device, or the like is used, and a tablet 102a made of a transparent digitizer is provided in contact with the screen. Further, a keyboard is used as the size selection instructing means 110, and a key input operation such as a size selection instruction of an input frame can be performed.

Coordinate detection means 103, coordinate data storage means 104, character recognition table 105, character recognition means 10
6. A microcomputer including a CPU, a ROM, a RAM, a timer, and an I / O port is used as the frame control unit 107, the timing unit 108, the frame size table 109, the dot count unit 111, and the coordinate data control unit 112. In particular, as the coordinate data storage unit 104,
Usually, the RAM therein is used, and the character recognition table 1 is used.
05, as the frame size table 109, the RO
M is used. In addition, as the time counting means 108, a timer therein is used. F as an auxiliary storage device
It is preferable to include a D (floppy disk) device and an HD (hard disk) device. Further, by further including a gesture command table and a gesture command determination unit, a gesture editing function by pen handwriting input becomes possible.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Note that the present invention is not limited by this. INDUSTRIAL APPLICABILITY The present invention is suitable mainly for a word processor having a display-integrated tablet, a personal computer capable of processing documents, a workstation, a mobile terminal, an electronic organizer, and the like. Each component uses an input frame for character recognition. The present invention can be used as a handwritten character recognition input device having an ordinary handwritten editing function in addition to achieving an improvement in the efficiency of text creation by handwritten characters.

FIG. 2 is a block diagram showing one embodiment of the handwritten character recognition input device of the present invention. In FIG. 1, reference numeral 1 denotes a display device including an LCD (liquid crystal display), which displays input handwritten characters, recognized characters, input frames, and the like on a screen. Reference numeral 2 denotes a tablet formed of a transparent digitizer that scans a screen of an electrostatic induction system, a magnetic induction system, or the like integrally formed on a screen of the display device 1. Reference numeral 3 denotes a pen for inputting coordinate data (handwritten characters, etc.) on the surface of the tablet 2 by a pointing operation such as a pen-down, a pen-up, and a pen drag (drawing locus). Reference numeral 4 denotes a keyboard for inputting key codes for calling a screen and setting a frame size.

Reference numeral 5 denotes a RAM, a pen coordinate buffer 5a for storing coordinate data pointed to the tablet 2 by the pen 3, a recognition result buffer 5b for storing character codes recognized by the recognition logic, and a created document. And a work buffer 5d for temporarily storing data to be processed. Reference numeral 6 denotes a ROM, which is a frame size table 6a storing various vertical / horizontal sizes of input frames, a character recognition table 6b, a control program 6c for operating the handwriting recognition character input device of the present invention, for example, recognizing handwritten characters. Recognition logic (RL) and pen handler (P
H), various control programs such as a frame display handler (DH1), a coordinate point display handler (DH2), a character display handler (DH3), and a frame check handler (WH) are stored. Here, the description of the individual control programs 6c will be omitted since it will be described later.

Reference numeral 7 denotes a CPU for controlling the apparatus. CP
U7 takes in the coordinate data of the locus drawn by the pen 3 into the input frame displayed on the screen of the display device 1 from the tablet 2, sets the taken-in coordinate data in the pen coordinate buffer 5a, and recognizes the recognition logic of the control program 6c. (RL) is started. The CPU 7 uses the recognition logic (RL)
The coordinate data is controlled by referring to the character recognition table 6b and outputting the recognition result (recognized character code) to the recognition result buffer 5b. Further, the CPU 7 uses the input frame for character recognition by the control program 6c to achieve an improvement in the efficiency of text creation by handwritten characters according to the present invention. R
It is preferable that an FD (floppy disk) device and an HD (hard disk) device are provided as the auxiliary storage devices of the AM5 and R0M6. Further, it is preferable to provide a printing device such as a thermal transfer printer or a laser printer.

FIG. 3 is an explanatory diagram showing an example of the vertical and horizontal sizes of the input frame stored in the frame size table. The frame size table 6a stores various vertical / horizontal sizes of input frames used for changing the frame size. FIG. 4 is an explanatory diagram showing a display example of a setting screen for setting the size of the input frame. When the user selects a frame size from the setting screen, the actual size is read from the frame size table 6a. At this time, the keyboard 4 is used as a key input operation when setting the frame size.

FIG. 5 is a schematic flowchart showing the operation procedure for setting the frame size on the setting screen of FIG. In FIG. 5, the setting screen of FIG. 5 is called by the keyboard 4, and first, on the setting screen of FIG. 5, the user determines which frame is to be selected and performs a key input. The value shown in FIG. 3 is set in the register D1 (frame horizontal width) / D2 (frame vertical width) depending on whether the key code output by this key input is 1, 2, or 3. D1 / D2 is used at the time of handwriting input in the next step. Therefore, at the time of handwriting input according to the user's preference,
Since an input frame that is easy to input as handwritten characters can be selected and displayed, input can be performed as if writing on paper, and sentences can be efficiently created.

FIG. 6 is an explanatory diagram showing an embodiment of the configuration of the pen coordinate buffer. In FIG. 6, PBSTAT, PBPTR: indicates a pointer on the pen coordinate buffer 6a. Character start command (MST): indicates the beginning of a character. Stroke start command (SST): indicates the start of one stroke (one stroke).・ Stroke end command (SEND): indicates the end of one stroke (one stroke) ・ Character end command (MEND): indicates the end of one character

The configuration of the pen coordinate buffer 5a is composed of commands (character start / stroke start / stroke end / character end) and XY coordinate data. Stroke start + (X
Y to XY) + stroke end is one stroke (1
Stroke), character start + (stroke start +
(XY to XY) + stroke end) + to + (stroke start + (XY to XY) + stroke end) + character end represents the entire stroke of one character. When the handwritten input XY coordinate point sequence + command is written into the pen coordinate buffer 5a and the recognition logic (RL) is started, the recognition result (character code) is output from the recognition logic (RL) to the recognition result buffer 5b.

FIG. 7 is an explanatory view showing one embodiment of a handwritten character input screen according to the present invention. In FIG. 7, when a document is input by handwriting, when a character is started to be written on the tablet 2 in contact with the display screen of the display device 1 at a position where the user wants to input with the pen 3 (FIG. 7A), a plurality of characters are written at that position. Is displayed (FIG. 7 (b)), and a handwritten character can be input (FIG. 7 (c)). Enter one character and 2 in the next box
When writing of the character is started (FIG. 7D), the first frame disappears, and the recognition result (character) is displayed (FIG. 7E).
You can enter characters. When a recognized character is displayed and a certain period of time elapses without pen-down and pen-up in the second frame, it is regarded that character input has been completed, and the frame is automatically erased (FIG. 7 (f)).

FIG. 8 is an explanatory diagram showing the relationship between the character display position and the input frame display position. In FIG. 8, MO
JISTATX / MOJISTATY is an XY coordinate (dot coordinate system) indicating the upper left of the display position of the input frame. CHRST
AT indicates the pointer at the left end of the recognition result character string display, and indicates a column position in the character coordinate system. CHRPTR is a pointer indicating the separation between the first character and the second character. FIG. 9 shows the upper left coordinates (D3X, D3Y) and the vertical size (D1) of the input frame.
FIG. 5 is an explanatory diagram showing a horizontal size (D2).

FIGS. 10 and 11 are flowcharts showing the control processing of handwriting input according to the present invention. Next, before describing the actual handwriting input according to the flowcharts of FIGS. 10 and 11, the various control programs 6c prepared in the R0M6 of FIG. 2 will be described. Note that a character string using alphanumeric characters indicates a register name.

[Recognition Logic (RL)] As described above, by setting the character coordinate data in the pen coordinate buffer 6a and starting up, the character recognition table 6b is referenced and the character code of the recognition result is output. I do. -[Frame display handler (DH1)] Input: D1 (frame width), D2 (frame length), D4 (display O)
N / OFF / CLEAR), D3X (X coordinate on top left of frame display), D3Y (Y coordinate on top left of frame display) Function: When D4 is ON, D3X / D3Y is used as a base point.
The input frame of vertical D1 / horizontal D2 is displayed. When D4 is OFF, the above frame is deleted. When D4 is CLEAR, the above frame is cleared (the frame is not erased).

[Coordinate point display handler (DH2)] Input: X, Y Function: Turns on the display dot at the XY coordinate position. -[Character display handler (DH3)] Input: CHRPTR (character display position, see FIG. 8), CH
RCODE function: Code CHRCO at the display position indicated by CHRPTR
Displays the letters DE.

[Frame check handler (WH)] Input: D1, D2, D3X, D3Y, X, Y Function: Pen-down coordinates (X, Y) are converted to upper left coordinates (D3
(X, DEY) / vertical D1 / horizontal D2. Output: W = 1N (inside frame), W = OUT (outside frame)

[Pen Handler (PH)] Function: Sense UP / DOWN status on the tablet. The XY coordinates (pen coordinates) at that time are output. Output: P = UP (pen up), P = DOWN (pen down), (X, Y) = pen coordinates on tablet

Next, the flowcharts of FIGS. 11 and 12 will be described with reference to FIGS. In FIG. 11, step S1: a pen handler (PH) is activated, and the pen is put on the tablet 2 in a waiting state in which the pen is down (a state in which characters are drawn by a user, FIG. 7).
(See (a)). When the pen 3 is down (P = DOWN), the process proceeds to the phase (processing stage) of step S2. Step S2: Character display position pointer on display (CHR
PTR) (CHRPTR = CHRSTA)
T). Next, the coordinates of the display screen position (M
OJISTATX, MOJISTATY) are set (see FIG. 8), and ON is set to the input parameter D4 of the frame check handler (WH).

Step S3: Frame check handler (W
H) is activated and the pen-down coordinates are displayed vertically D1 from the upper left of the display.
/ Wide D2 is determined. If it is out of the frame range, the process proceeds to step S4. Step S4: Step S until the pen is up
Return to 1. Step S5: The first input frame is displayed at the upper left of the screen according to the parameters set in step S2 (see FIG. 9) (the left frame is displayed in FIG. 7B). Steps S6 and S7: The second frame is displayed (the right frame in FIG. 7B is displayed).

Step S8: After initializing the pointer (PBPTR) of the pen coordinate buffer (PBPTR = PBS)
TAT), character start command (MST) and stroke start command (SST) are set (written), and PBP
TR is increased by that amount (2N). Here, 0 is set in a retry counter (PTYCNT) described later. Steps S9, S10, S11: While the pen is down, the pen coordinates (XY coordinates output from the PH) are written into the pen coordinate buffer 5a, and the pointer is raised. The dot point sequence at the corresponding position on the display is turned on (the handwriting of the user is displayed as the dot point sequence, see FIG. 7C). The pen rises in step S9 (end of one stroke)
And it transits to step S12. Step S12: It is determined whether or not the next pen down occurs, and if there is a pen down, the process proceeds to step S13.

Step S13: Pen down coordinate XY is 2
It is determined whether or not it is within the range of the frame. If it is within the range (see FIG. 7D), the process proceeds to step S14. If not, the process proceeds to step S21. Steps S21 and S22: The frame width (D2) is subtracted from D3X, the frame check handler (WH) is started, it is determined whether or not the pen-down coordinates (X, Y) are inside the first frame. If it is (the next one image in the same frame), the process proceeds to step S24. If it does not enter (it does not belong to the first frame or the second frame), the process proceeds to the invalidation process of step S23.

Step S23: Treat as an error, wait for pen-up, transition to step S12, and wait for pen-down again. Step S24: Another stroke in the same character (one stroke)
And writes a stroke end command (end of current stroke: SEND) / stroke start command (start of next stroke: SST) in the pen buffer,
The process proceeds to step S9 to enter a pen-up waiting state. Steps S14 and S15: In order to subtract D2 (frame width) of the first frame from D3X (pointing to the head of the second frame), D
By setting OFF to 4 and activating the frame display handler (DH1), the first frame is erased (FIG. 7).
(E)).

Steps S15 and S16: D3 × D2 ×
By adding 2 (frame width × 2), setting ON to D4 and activating the frame display handler (DH1), the second frame is displayed (see FIG. 7E). Step S17: The stroke end command (SEND) / character end command (MEN) is stored in the pen coordinate buffer 5a.
D) is written and the pointer is raised. Now Figure 2
The setting of the pen coordinate buffer 5a shown in
The recognition logic (PR) is ready for activation.

Step S18: Activate the recognition logic. Step S19: DH3 is started. The character “A” of CHRCODE (output of DH3) is displayed at the position of CHRPTR (see FIG. 7E). Step S20: CHRPTR is incremented by one, the process returns to step S8, and transitions to processing of the next character.

Next, the pen input timeout function will be described with reference to steps T1 to T8 shown in FIGS. Step T1: At step S9, when the pen goes up (the pen goes up after drawing one image), TINUP (constant) is set to a timeout time counter TIMCNT. Steps T2 and T3: As long as the pen-up state continues in step S12, TIMCNT is reduced to monitor whether or not the value goes to 0. When TINCNT becomes 0 in step T3, it is considered that pen-up has continued for a certain period of time, and
Transition to 4.

Steps T4 and T5: The first frame / second frame are deleted (FIG. 7 (f)). This is the same as the processing in steps S14 to S16. Step T6: Steps S17 to S20 are performed. Steps T7 and T8: Wait for pen down, set ON to D4, and return to step S3 (return to user input wait). Therefore, if the pen is kept up for a certain period of time, it is automatically regarded as the end of the handwriting input, and there is no need to instruct the end of the handwriting input, and the operability of the user can be improved.

Next, the character input position correction processing function will be described with reference to steps R1 to R4 shown in FIG. FIG. 12 is an explanatory diagram showing one embodiment of the correction operation of the character input start position. As shown in FIG. 12, when trying to write the character "U" in the frame, it is necessary to drop the pen near P, but it is assumed that the pen is mistakenly dropped near Q. At this time, if the pen is immediately moved up without moving the pen of a certain number of dots, the locus of Q is erased and rewriting is enabled.

In step S8, RTYCNT (retry counter) is initialized to zero. Step R1: RYTCNT is incremented by one as long as the pen continues to move in the down state and keeps displaying the trajectory of the pen. Therefore, when the pen is up,
In RTYCNT, the number of dots for which the pen has been down is set. Step R2: If the number of dots counted by the RTYCNT is smaller than the reference value (3 dots), it is determined that rewriting is performed. Step R3: Clear the contents of the first frame. Step R4: Wait for re-input. Therefore, even if the pen is once dropped to an incorrect position, it can be raised and easily rewritten.

[0045]

According to the handwritten character recognition input device of the present invention,
If you hold the pen up for a certain period of time,
Must be instructed to end handwriting
There is no need to improve user operability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of the present invention.

FIG. 2 is a block diagram showing one embodiment of a handwritten character recognition input device of the present invention.

FIG. 3 is an explanatory diagram showing an example of the vertical and horizontal sizes of an input frame stored in a frame size table.

FIG. 4 is an explanatory diagram showing a display example of a setting screen for setting the size of an input frame.

FIG. 5 is a schematic flowchart showing an operation procedure for setting a frame size on the setting screen of FIG. 4;

FIG. 6 is an explanatory diagram showing one embodiment of a configuration of a pen coordinate buffer.

FIG. 7 is an explanatory diagram showing one embodiment of a handwritten character input screen according to the present invention.

FIG. 8 is an explanatory diagram showing a relationship between a display position of a character and a display position of an input frame.

FIG. 9 is an explanatory diagram showing upper left coordinates (D3X, D3Y) and a vertical size (D1) / horizontal size (D2) of an input frame.

FIG. 10 is a flowchart illustrating a handwriting input control process according to the present invention.

FIG. 11 is a flowchart showing a control process of handwriting input of the present invention, following FIG. 10;

FIG. 12 is an explanatory diagram showing an embodiment of a correction operation of a character input start position.

[Explanation of symbols]

 Reference Signs List 1 display device 2 tablet 3 pen 4 keyboard 5 RAM 5a pen coordinate buffer 5b recognition result buffer 5c document buffer 5d work buffer 6 ROM 6a frame size table 6b character recognition table 6c control program 7 CPU

Continuation of the front page (56) References JP-A-1-261720 (JP, A) Nobuo Suzuki "Birth of a handwriting input OS, opening up a new market for personal computers-Part 3 Developing basic technologies for easy-to-use handwriting input , Nikkei Electronics, Nikkei BP, April 15, 1991, Vol. 525, p. 131 (58) Fields investigated (Int. Cl. ⁷ , DB name) G06K 9/62 G06K 9/03

Claims (1)

(57) [Claims] 1. A pen for inputting handwritten characters, and a tablet integrally formed on a screen, wherein when the handwritten characters are drawn on the tablet by the pen, a plurality of character recognition input frames are displayed and the input frame is displayed. Display means for sequentially displaying handwritten characters and recognized characters input to the input device; coordinate detecting means for detecting the pen up / down signal and detecting the handwritten characters input to the input frame as coordinate data composed of dots; A coordinate data storage means for storing the detected coordinate data, a character recognition table in which various kinds of coordinate data and recognition characters based on a predetermined format are stored in advance, and a character recognition table which is inputted by referring to the character recognition table. Character recognition means for converting the coordinate data into corresponding recognition characters and outputting the same to the screen, and handwriting with the pen and tablet. When entering text, the plurality of input frames obtained by forming a larger size than the recognized character is output, a frame control means arranged on the screen along the recognized character the same row / column and the coordinate detection By means of the pen
Timing that measures the pen up time in response to the up / down signal
Means, and the frame control means responds to an up / down signal of the pen.
After the pen has entered a character, is the character entered in the next input box?
To determine whether or not the pen up time
It is assumed that the input of characters has been completed when the specified time has elapsed.
It is special to delete all input frames that are judged and displayed.
Handwritten character recognition input device.