JPS63136290A - Hand-written character input device - Google Patents

Abstract

PURPOSE:To confirm the result of recognition of a character without shifting the line of sight by displaying the pattern of the recognized character to a character position based on information of the character position of a character being manually written and inputted. CONSTITUTION:A position input device 1 inputs stroke information to a position data buffer 21, and it is outputted to a character recognition part 22, a character position calculation part 23 and a stroke display part 24. The recognition part 22 analyzes the inputted stroke information with the aid of the recognition dictionary of an external storage device 3, recognizes it and outputs the result to a character code buffer 25. The calculation part 23 calculates the position of the written character, outputs it as character position information of the written character, outputs it as character position information to the buffer 25, adds the information to the character code of the recognized character and stores the code. A display and edition part 26 analyzes the character code and produces character string data to be displayed on a display device 4 in accordance with rules. Meanwhile, a stroke display part 24 displays the inputted position data on the display device 4 by dots. Hence, while one character is manually written, its stroke information is displayed, thereby movement a of the line of sight is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Industrial Application Field) The present invention relates to an old-fashioned character input device in which a position input device and a display device are stacked and integrated.

(Prior Art) Keyboards as man-machine interfaces are not easy to use for people who are not proficient in key operations. The development of a handwritten character input device is underway.This handwritten character input device recognizes characters drawn on a coordinate detection surface using an input pen and uses this recognition result as input information. It is expected that it will play an important role, especially as one of the character input methods for Japanese word processors, because even people who are not familiar with it can easily input characters.

However, conventional handwritten character input devices only have the function of inputting coordinate information, so it is necessary to check whether the written characters are in the correct shape or whether the coordinate information is input with appropriate pen pressure. I couldn't. Therefore, a hand-polished character input device has also been developed in which a position input device made of a transparent material is superimposed and integrated on the display surface of a display device made of liquid crystal, for example. According to this device, since the handwriting of characters, figures, etc. input by hand is displayed, there is an advantage that the handwriting progress can be checked by oneself and correct input can be performed.

By the way, when inputting handwritten characters, it is necessary not only to check the handwriting but also to check whether the characters are correctly recognized. However, conventionally, this display was
Since the information was displayed on a display device such as a T-display, the operator had to move his/her line of sight to the display each time he/she inputted a character, which caused significant eye fatigue.

(Problems to be Solved by the Invention) As shown in this, in the conventional hand-worn character input device, when confirming the input character recognition result, the user's line of sight must be focused as much as the fist. This made it difficult to use.

The present invention was made in order to solve such problems, and an object of the present invention is to provide a handwritten character input device that can confirm the handwriting and recognition results of characters without moving the line of sight. There is.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a character code that indicates the position where this character is written, in the character code of the character recognized based on the handwriting information output from the position input means. It is characterized in that position information is added and recognized characters are displayed based on this information.

That is, the present invention provides a position input means that detects the position of a writing point and outputs coordinate information of the position, and a handwritten input from the time-series coordinate information (handwriting information) output from the position input means. a character recognition means for recognizing a character and outputting a character code of the recognized character; a character position calculation means for calculating an input position of the handwritten character in the position input means from handwriting information output from the position input means; A character code storage means for adding and storing character position information calculated by the character position calculation means to the character code output from the character recognition means, and a character code storage means provided integrally with the position input means, and configured to add and store information on the character position calculated by the character position calculation means, and to A feature of the present invention is that the apparatus further includes a display means for displaying the recognized character based on the character code stored in the character code storage means.

(Operation) In the present invention, since information on the position where the character is written, that is, character position information, is added to the character code, the display means determines the display position of the recognized character according to this character position information. Therefore, since the recognized character can be displayed at or near the position where the character is actually destroyed, the user hardly needs to move his/her line of sight from the character input unit to check the recognition result.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing the configuration of a handwritten character input device according to this embodiment. This device includes a position input device 1, a central processing section 2, an external storage device 3, and a display device 4.

fffff The input device 1 detects the position of a writing point indicated by, for example, a pen on its detection surface and outputs the coordinates of the position to the central processing unit 2.

This position input bag M1 is constructed integrally with the display device 4, as shown in FIG. 2(a). That is, the position input device 1 is placed on the display surface of the display device 4 made of, for example, liquid crystal, and is entirely made of a transparent body so that the display surface can be checked.

The position input device 1, for example, as shown in FIG. 2(b),
Conductive films 11 and 12 are connected via several tens of spacers 13. Then, when a predetermined location is pressed with the ben 14 as shown in the figure, the conductivity above and below the pressed location [1
11 and 12 are in contact and conductive. Therefore, the coordinates of this conduction point can be determined, for example, by measuring the voltages on the four sides of the conductive film 11, 12.

The central processing unit 2 is configured as follows.

The time-series coordinate information of the pressure point output from the position input device 1 is stored in the position data buffer 21 as handwriting information. Location data buffer? The handwriting information stored in 21 is output to a character recognition section 22, a character position calculation section 23, and a handwriting display section 24.

The character recognition unit 22 performs character recognition by analyzing the input handwriting information using a recognition dictionary stored in the external storage device 3, and outputs the obtained 8-character code to the character code buffer 25. .

That is, the recognition dictionary stored in the external storage device 3 includes, for example, the number of strokes D1 of a character and the number of line segments when each stroke is divided into a plurality of line segments from the start point to the end point, as shown in FIG. It is made up of a direction string D2 and corresponding character code information D3. For example, as shown in Figure 4(a), when expressing the characters 113 IT, the direction of the handwriting is 2→5→2→3→ in Figure 4(b).
Since the character changes from 5 to 7, if such a change in handwriting is detected from the handwriting information from the position data buffer 21, this character is recognized as "3". When recognized in this way, the character recognition unit 22 sends the character code to the character code buffer 2.
5, a character code indicating +13 IT is output.

On the other hand, the character position calculation unit 23 uses the position data buffer 21
Analyzes the content of the text and determines the character position of the desired character.

This character position can be determined by, for example, finding the outer tangent of one character and finding the coordinates of the center of the part surrounded by this outer tangent. These coordinates are output to the character code buffer 25 as character position information. The character code buffer 25 stores the input character position information added to the character code of the recognized character.

More specifically, the format of the data stored in the character code buffer 25 is shown in FIG.

In other words, Fig. 5<a) shows a case where multiple characters are regularly arranged at a constant pitch, and the attribute information is vertical writing/
Horizontal writing, character spacing, line spacing, angular position of the first character, font size, color, 12 fonts, etc. are shown. FIG. 5(b) shows the case of one character, and the attribute information includes character size, color, font, and position information of the written character. Fifth
FIG. 5(C) shows attribute information used when changing the attributes of some characters in the plurality of character strings in FIG. 5(a). In this way, the character code buffer 25 stores not only character codes but also character attribute information at the same time.

The character code stored in the character code buffer 25 is output to the display editing section 26. This display editing section 26
analyzes the character code output from the character code buffer 25, gives the character code to be displayed on the display device 4, and the display area/location, and at the same time examines the position data of the character attribute assigned to each character, It is checked whether there is regularity at this position within a certain value range, and if there is regularity, those character string data are created into one character string data.

On the other hand, the handwriting display section 24 displays the positional data inputted from the positional data buffer 21 as dots on the display device 4, thereby displaying the handwriting of the drawn characters. Further, the handwriting display section 24 sequentially displays the position data stored in the position data buffer 21, redisplays the handwriting, and further erases the already displayed handwriting.

Roughly speaking, the display device 4 is configured as shown in FIG. Character data from the display editing section 26 and handwriting information from the handwriting display section 24 are provided to the display processing section 31. When a character code is given to the display processing section 31, the display processing section 31 reads a character pattern corresponding to the character code from the character font section 32, and writes this character pattern into the screen memory 33 corresponding to the display position. The liquid crystal display section 34 follows the drive signal from the liquid crystal drive section 35.
The data in the screen memory 33 is sequentially read out and displayed. Further, when handwriting information is given to the display processing section 31, this information is directly stored in the screen memory 33, and the same display operation as described above is performed.

Therefore, even when information other than characters, such as graphics, is input, this is handled and displayed in the same way as handwriting information.

Next, the flow of character input processing in the handwritten character input device configured as described above will be explained based on FIG. 7. First, a pen ON check is performed to determine whether pressure by the pen is detected on the position input device 1 (step a). If the pen is ON, it is assumed that the data is within one stroke, and the position data is stored in the position data buffer 21 (step b), and the handwriting display unit 24 displays the handwriting IJ information as a dot on the display device 4. (Step C). Furthermore, if the pen is OFF, it is assumed that one stroke has ended and the next stroke is started, and the delimiter code is stored in the position data buffer 21 (step d).
. In this way, the position data and delimiter code are stored in the position data buffer 21. At this time, the starting position of the stroke is V? If the position is within a certain value from the previously stored stroke position data, this stroke is also determined to be a stroke that constitutes a character.Step e)
, stores the position data in the position data buffer 21 as a stroke following the previous stroke. On the other hand, if the interval between strokes is greater than a certain value, it is determined that this is the beginning of a new character, and the character is recognized using previous position data (step f).

The character recognition unit 22 analyzes the data in the position data buffer 21, first examines the delimiter data, and determines the number of strokes. Next, for each stroke, determine the direction value between two points from each coordinate position data that makes up the stroke,
Create direction column data. Furthermore, this direction column data is searched, and if the same direction value continues, it is represented by one direction value, and the direction column data is compressed. External storage i location 3
Direction string information D2 and character code D3 corresponding to the number of strokes are read out from , and stored in a temporary buffer 7 (not shown) provided in the character recognition unit 22, and the direction string data created above and the direction of this temporary buffer are 11 information to see if there is a match. If they match, the character code is extracted and written to the character code buffer 25. At this point, the characters are recognized. Even when there is no exact match, if there is a match within the allowable range, that character code is extracted (step f).

When the character is numbered 11 and the character code is set (step Q), the character position calculation unit 23 analyzes the data in the position data buffer 21 and first calculates the size of the written character and the character code. Step h) to calculate the center of gravity. The size of the characters is set in advance in steps, and it is determined which size class the characters fall into. The display position of the character pattern is determined so that the center of gravity of the pattern of the determined character size matches the center of gravity of the calculated handwritten character, and this position is stored in the character code buffer as the attribute v4 report of the recognized character code. Store (step i). next,
The handwriting display section 24 erases the handwriting of the displayed handwritten characters (step j).

Erasing is performed by issuing a command to the display device 4 so that the handwriting display section 24 displays the data in the position data buffer 21 as a dot using an exclusive OR. In this way, the first written character is erased. Next, the display editing unit 26 analyzes the data in the character code buffer 25, and uses the newly stored character code and Ii! It is determined whether the character information should be arranged regularly with respect to the character code and attribute information that have already been stored, and if it is arranged regularly, the Convert to string data. If no regularity is found, position information is set as a character attribute as shown in FIG. 5(b). The display editing unit 26 extracts the character code and position information stored in the character code buffer 25, and provides the extracted character code and position information to the display device 4 to display the character.

According to the above procedure, as shown in FIGS. 8(a) to 8(d), while one character is being handwritten input, its handwriting information is displayed, and when one character is finished writing, the character 0 When the recognition is completed, the handwriting information is erased, and the character pattern resulting from the recognition is then displayed at the character input position. Therefore, characters can be input without moving the line of sight at all.

[Effects of the Invention] As described above, according to the present invention, a pattern of 11 characters can be displayed at the character positions based on the character position information of handwritten input characters, so that the user's line of sight is hardly moved. You can check the result of character recognition without any trouble.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a handwritten character input device according to an embodiment of the present invention, FIG. 2(a) is an external perspective view of a position input device and a display device in the same character input device,
Figure (b) is a partial sectional view of the same position input device, Figure 3 is a diagram showing the contents of the recognition dictionary stored in the external storage device in the same character input device, and Figure 4 is the character recognition unit in the same character input device. Figure 5 is a diagram showing the format of data stored in the character code buffer in the character input device, and Figure 6 is a diagram showing the configuration of the display device in the character input device. FIG. 7 is a flowchart showing the processing procedure of the character input device, and FIG. 8 is a diagram showing a display example of the character input device. 1... Position input device, 2... Central processing unit, 3...
external storage device, 4... display device; Applicant's representative Patent attorney Takehiko Suzue Figure 2 Figure 3 (a) (b) Figure 4 Figure 5 Figure 8

Claims (3)

[Claims] (1) A position input means that detects the position of a writing point and outputs coordinate information of that position, and recognizes characters input by hand from handwriting information consisting of time-series coordinate information output from this position input means. character recognition means for outputting a character code of the recognized character; character position calculation means for calculating the input position of the handwritten character in the position detection device from handwriting information output from the position input means; and the character recognition means character code storage means for adding and storing character position information calculated by the character position calculation means to the character code output from the character code, and provided integrally with the position input means,
A handwritten character input device comprising: display means for displaying the handwriting information and the recognized characters based on a character code stored in the character code storage means. (2) The handwritten character input device according to claim 1, wherein the display means displays the recognized character at the character position calculated by the character position calculation means. (3) The display means displays the handwriting of handwritten input characters based on the handwriting information output from the position input means, and erases the display of the handwriting information after the character recognition by the character recognition means is completed. 2. The handwritten character input device according to claim 1, wherein the recognized character is displayed based on a character code stored in the character code storage means.