JPH0679351B2 - Character editing device - Google Patents

Description

The present invention relates to a character editing device in a handwriting input device integrated with a display device, and is an editing device in which a tablet used as an input device is effectively used as a pointing device. The present invention relates to a character input method for a base character editing device.

The coordinates for one stroke designated by the pointing device are input, and it is first determined whether or not the input area is the handwritten character writing area. If YES, the stroke pattern is stored in the character data buffer. NO
In the case of, it is determined whether it is the keyboard area. If it is not in the keyboard area, the contents of the character data buffer stored so far are cut out as data for one character and sent to the recognition unit. When the pen tip of the pointing device is separated from the handwritten character entry area and the pen tip comes to the corrected character position of the text being edited, the position is calculated from the coordinates of the pen tip. Then, the recognition result is displayed at the position of the pen tip. In the case of the keyboard area, the reading result is displayed at the position of the pen tip of the corrected character position. The present invention is a character editing device that continues this process.

Since this device cuts out characters, recognizes them, and designates the display position with a single operation, the number of operations can be reduced and handwriting can be easily performed even by a beginner.

[Industrial application field]

The present invention relates to a handwriting input device, and more particularly to a character editing device capable of cutting out a character, recognizing it, and designating a display position with a single operation.

[Prior art]

When inputting Japanese with a Japanese processor, there are methods that use a keyboard, such as a full-character layout tablet, kana-kanji conversion, katakana-kanji conversion, etc., but these methods have the problem that it takes time to search for characters. is there. Therefore, an online handwritten character recognition device has been attracting attention.

The online handwritten character recognition device is a device for writing characters on a tablet using a writing pen, recognizing the written characters by a recognition processing unit, converting the characters into properly arranged characters, and displaying the characters.

Traditionally, such handwriting recognition devices have been coupled to keyboard-input word processors. In the case of keyboard input such as in a word processor, the following key operation is required to correct an appropriate character in the already displayed character sequence and insert a new character.

First, move the cursor to the correction point and press the insert key. After that, enter the character to be corrected and press the enter key. In this case, it is necessary to operate the keys four times by moving the cursor, inserting keys, inputting characters, and hitting the execution keys.
Character conversion requires five key operations.

[Problems to be solved by the invention]

In a word processor with such keyboard input,
In the method that combines handwriting-based character editing, forcibly handwriting input is added using a keyboard-based editor, so there are many operations for cutting out characters, recognizing characters, and specifying the display position. The characteristics of can not be used effectively.

As described above, in the conventional character editing method for the handwriting input device, although the handwriting input attracts attention as a Japanese input means for amateurs, the tablet used as the input device cannot be effectively used as the pointing device. There is a point. Furthermore, this conventional method has a problem in that it is impossible to effectively utilize the direct operation of the tablet, that is, the characteristics of direct manipulation, so that it is impossible to cut out characters, recognize them, and specify the display position with one operation. .

[Means for solving problems]

A configuration of a handwriting input device according to the character editing system of the present invention is shown in FIG.

In the present invention, the area determination unit 6 first determines whether the area of the character input on the tablet 1 for inputting characters by handwriting or key touch is the handwritten character entry area 30 or the keyboard area 31. Then, a character is cut out by the character cut-out control unit 9 according to the determined area, the obtained character is recognized by comparing with the reference character in the dictionary unit 10 by the recognition unit 3, and further recognized by the recognition unit 3. The display unit 4 displays the character at the corrected character position obtained from the coordinates of the pen tip inside the control unit 2.

In the present invention, first, the contents of the stroke / pattern storage buffer 5 for storing the character data in the control unit 2 are cleared, and a line is drawn from when the pen is moved down by the handwriting of the character until it is moved up again. That is, the coordinates for one stroke are input. Then, the area determination unit 6 determines whether the input area is the handwritten character entry area 30 or the keyboard area 31. In the case of the handwritten character entry area 30, the stroke pattern is stored in the stroke pattern storage buffer unit 5 as character data. If it is not the handwritten character entry area 30, it is determined whether it is the keyboard area 31, otherwise it is the figure entry area 32.
The data stored in the stroke pattern storage buffer 5 up to that point is sent to the cut-out recognition unit 3 as data for one character. Then, the corrected character position is calculated from the coordinates of the pen tip, and the recognition result is displayed at the position in the figure writing area 32 of the CRT 41 via the control unit 2 and the display unit 4. If it is determined to be the keyboard area 31, a character of the coordinate designated by the coordinate / character conversion table 7 is generated and the code is stored in the code buffer 8. Then, the result read from the keyboard area is CR-displayed via the display control unit 40.
Displayed at the position of the pen tip on T41. The present invention has means for repeating this process.

[Work]

In the character editing apparatus of the present invention, the control unit 2 of FIG. 1 detects whether the area of the character entry position is the handwritten character entry area 30 or the keyboard area 31, and executes the process for each area. That is, when the pen points to a position other than the handwritten character writing area 30, it means that all strokes of the character are currently being written, and the pen points to a position other than the handwritten character writing area 30. Processing is executed so as to instruct that the designated position is the display or insertion position of the character.

〔Example〕

Next, a character editing device of the present invention will be described with reference to the drawings.

The configuration of the display screen on the display unit 4 of the handwritten character input device according to the character editing system of the present invention in FIG. 1 is shown in FIG. The screen area shown in FIG. 3 displays a handwritten character entry area 30 in which the user strokes any kanji by handwriting, a keyboard area 31 in which a predetermined alphanumeric symbol or hiragana or katakana is designated by a key, and edited text. Is divided into the graphic writing areas 32.

The text is displayed in the graphic entry area 32. In this case, when adding a new character at the end of the text, when correcting any one character of the already written text, or between characters May insert new characters into. And
In the present invention, characters may be input by a user making strokes in the handwritten character entry area 30 with a pen, or by specifying a character that already exists on the keyboard area 31.

For example, when the user writes the character "Kan" stroked by the handwriting in the handwritten character entry area of FIG. 3, the user specifies the figure entry area 32 after the stroke operation of the character is completed. You will need to take the pen tip to the position where you want it. That is, as shown in FIG. 4A, in the handwritten character writing area 30, after the stroke of the character "Kan" is completed, the pen tip is brought to the required position in the figure writing area 32.

Alternatively, when displaying, for example, a hiragana "A" in the keyboard area 31 at a designated position in the graphic entry area 32, as shown in FIG. With a pen and bring the pen to the designated area in the figure writing area 32,
Is displayed.

As shown in FIG. 4 (a), when a stroke is made with a pen in the handwritten character writing area 32, in the present invention, the character is cut out by touching the pen at an arbitrary position in the figure writing area 32. . After the completion of the pen touch, one character of the Chinese character drawn in the handwritten character entry area 32 is transferred to the recognition unit 3 and the position information corresponding to the handwritten character pattern is transferred and recognized. Further, control for displaying the recognition result at the position of the pen touch specified in the figure writing area 32 is executed.

Further, as shown in FIG. 4B, when the keyboard area 31 is designated, the same character as the character touched by the pen is first displayed in the handwritten character entry area 30 and the figure entry area 32 is displayed. The specified character is displayed at the position touched with the pen above. Therefore, when the characters in the keyboard area 31 are used, the control unit 2 simply specifies the characters obtained by the coordinate / character conversion table 7 and the Code buffer 8 in the figure writing area 32 without the recognition unit 3. Works to display in position.

When the stroke is made in the handwritten character entry area 30, after the stroke is completed, when a position other than the character entry area 30 is designated, that is, when the pen is touched on the figure entry area 32, the end of the character currently being entered is completed. The control unit 2 operates so that the designated position on the graphic writing area 32 indicates the character display or the character insertion position. Therefore, the control unit 2 operates so that the coordinate position of the pen touch in the handwritten character input area 30 and the position designated in the figure writing area 32 after the stroke are always calculated.

In the handwritten character entry area 30, when the designated position is specified in the figure entry area 32 after the stroke is completed, the recognition unit 3 recognizes the stroked character. When the recognition unit 3 performs recognition processing of handwritten characters, the original data is a time series of coordinates sent from the tablet. Recognition unit 3
First performs preprocessing such as smoothing, character size, and position regulation on this coordinate data, and then extracts the features of the strokes that make up the character from the preprocessed data. The result is used to match the characters of the dictionary stored in the dictionary unit 10 in advance.

There are various methods for performing stroke feature extraction. For example, a stroke direction and length may be used, or a stroke curve may be approximated and feature point coordinates may be used. Alternatively, there is also a basic stroke method in which the sample points of the strokes obtained by the preprocessing are connected by straight lines and are approximated by, for example, 8-direction codes. Also, when matching with the dictionary part, since the length of the line segment differs between the actually written input character pattern and the character pattern of the dictionary, the length of each line segment of the input pattern is changed appropriately. So-called DP matching is performed. When all the strokes of the input pattern and the character pattern of the dictionary are compared one by one, the most similar stroke is selected from the dictionary portion, so that the stroke can be correctly recognized even if the stroke order of the user is different.

Next, the processing of the control unit 2 that cuts out characters, specifies a display position or an insertion position by one operation of the present invention will be described with reference to the flowchart of FIG.

When the operation starts, the control unit 2 first clears the contents of the stroke pattern storage buffer 5 (ST1). Next, in ST2, the coordinates for each stroke when drawing a Chinese character with a pen in the handwritten character entry area 30 are calculated,
Enter the coordinates. In ST3, it is determined from the coordinates whether or not the area currently touched by the pen is the handwritten character entry area 30. If it is the handwritten character entry area 30, each stroke pattern is stored in the stroke pattern storage buffer unit 5 in ST4. Then, returning to ST2, the coordinates for the next one stroke are input again.

In ST3, if the stroke coordinate of the handwritten character currently stroked is not the handwritten character entry area 30,
That is, at this time, one kanji character in the handwritten character entry area 30 has been drawn and completed. Then, the user moves the pen away from the handwritten character writing area 30.
In this case, the control unit 2 moves to ST5 and determines whether or not the next pen-touched position is in the keyboard area 31.
If the keyboard area 31 is touched with the pen, the control moves to ST6, and the result read from the coordinate / character conversion table 7 is stored in the Code buffer 8. That is, in ST6, when a pen is touched on the keyboard area 31, the correspondence between the coordinate position and the character pattern is the internal RO.
Since it is a table in M, by accessing this ROM, it becomes possible to transfer the designated character to the Code buffer 8 as a code. Then, in ST10, the characters read as a result from the keyboard area 31 are added to the graphic entry area.
32 Display at the position of Xc, Yc specified above. Thereafter, control will return to the start condition.

In determining whether it is the keyboard area of ST5, if
If the pen-touched position is not in the keyboard area 31, that is, it is neither the handwritten character entry area 30 nor the keyboard area 31, the pen-touched location is the figure entry area 32, so the character is cut out. Therefore, a character cutout signal is sent to the recognition unit 3 (ST7).

In the present invention, this character is cut out by a single operation, so the control is executed as follows. That is, when the processing in the control unit 2 is instructed to a place other than the character writing area 30, the end of the character currently being written is instructed, and the instructed position instructed in the figure writing area 32 is the character position. The character cutting operation is executed in one operation so as to indicate the display or insertion position. Then, after recognizing these coordinates, the process proceeds to ST8. At this time, since the handwritten character drawn on the handwritten character entry area 30 is stored in the stroke pattern storage buffer unit 5, this data is read and sent to the recognition unit 3 as one character data. In ST9, the recognizing unit 3 extracts the features of each stroke, matches the data in the dictionary unit 10, and recognizes. The recognition result is stored in the Code buffer 8. In ST11, the figure entry area has already been entered
The corrected character position is calculated from the pen touch position on 32, that is, the coordinates of the pen tip, and these coordinates are defined as Xc and Yc. Next, in ST10, the recognized result is displayed at the position of the coordinates Xc, Yc.

The contents of the stroke pattern storage buffer are cleared again from ST10, the coordinates for one stroke are input, and the same operation is executed.

〔The invention's effect〕

According to the character editing method of the present invention, when a place other than the character writing area is touched with a pen, the end of the character currently being written is instructed, and the indicated position of the place is confirmed to be the display position of the character. It is possible to efficiently perform the operation of cutting out, recognizing, displaying or inserting the character. Such a single operation has the effect of reducing the time waiting for input.

[Brief description of drawings]

FIG. 1 is a block diagram of a handwriting character input device according to the character editing system of the present invention, FIG. 2 is a flowchart of processing of a control unit of the present invention, FIG. 3 is a diagram of a screen area of a display unit, and FIG. (A), (b) is a figure which shows the pen action on the screen area of FIG. 1 ... tablet, 2 ... control unit, 3 ... recognition unit, 4 ... display unit, 5 ... stroke / pattern storage buffer, 6 ... region determination unit, 7 ... coordinate / character conversion table, 8 ... … Code buffer, 9 …… Character cut-out control section, 10 …… Dictionary section, 30 …… Handwritten character entry area, 31 …… Keyboard area, 32 …… Figure entry area, 40 …… Display control section, 41 …… CRT .

Claims (2)

[Claims] 1. In a character editing device for inputting handwritten characters and displaying the handwritten characters at an arbitrary position in a sentence, handwriting input on a screen having at least a handwritten character writing region and a figure writing region for displaying a sentence and the like. When the coordinates to indicate a place other than the handwritten character entry area,
A character cutout unit that determines that the handwriting of the character currently being filled has been completed, and, in the character cutout unit, when it is determined that the handwriting of the character has been completed, the instruction made by pen-touching a location other than the handwritten character entry area. A handwriting character recognition unit that collates the pattern of the character stroked on the handwritten character writing area with the pattern of the dictionary unit by the editing position designating unit that determines that the position is the editing position of the character and the character cutting unit. And a display means for displaying the recognized result at a designated position on the screen, a character editing device in a handwritten character input device. 2. The character editing device according to claim 1, wherein the handwritten character is input by handwriting or pen touch.