JPH0632068B2 - Handwriting recognition device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention recognizes character information input by handwriting from a display-integrated tablet as a character by a recognition unit under the control of a processor, and recognizes the recognition result as the tablet. The present invention relates to a handwritten character recognition device for displaying and outputting on a screen.

<Prior Art> Conventionally, for example, a handwritten character input word processor has been known as a handwritten character recognition device of this type. This word processor is equipped with a display-integrated tablet in which a tablet as an input unit having a pen for instructing coordinates and an EL (electroluminescence) as a display unit are superposed, and the input unit of this display-integrated tablet is provided. Under the control of the processor, the recognition unit recognizes the characters input by handwriting with the pen, and the recognition result is subjected to editing processing such as correction, deletion, insertion, and kana-kanji conversion, and the result is displayed on the display screen. It is displayed in place of handwritten characters on the display unit of the body type tablet. The input of handwritten characters is performed by sequentially writing the characters in a character frame provided in a grid pattern on the entire surface of the display unit.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional handwritten character input word processor, since a character frame is provided in a grid pattern on the entire screen of the display unit, the character written by the pen cannot be written in this character frame. It is difficult to read because it is handwritten, and there is a drawback in that printed characters that are recognition results are difficult to read due to the above-mentioned grid-shaped character frame. To eliminate this defect, it is enough to eliminate the character frame at all, but then it becomes difficult to write the character, and the character recognition becomes a fact because the character string becomes slanted and each character becomes large and small. There is a problem that it becomes impossible.

Therefore, an object of the present invention is to additionally display a new character frame sequentially at the end of the character frame each time the operator writes a character in a small number of character frames previously displayed on the display-integrated tablet,
Addition of the above-mentioned editing process, which makes it easy to read the written characters and printed characters, realizes smooth character entry at appropriate positions, facilitates character recognition, and uses the complicated key operation of the conventional keyboard. An object of the present invention is to provide a handwritten character recognition device that can be speeded up by using a character frame and an input means such as a pen.

<Means for Solving Problems> In order to achieve the above object, the handwritten character recognition device of the present invention has a character information input by handwriting using a input means in a character frame displayed on a display-integrated tablet. Is recognized as a character by the recognition unit under the control of the processor and the recognition result is displayed and output to the display-integrated tablet, whether the input means moves from one character frame to the next character frame. When it is determined that the input means has moved from one character frame to the next character frame, a new character frame is added to the end of the character frame. Secondly, it is determined whether or not the character frame addition / generation means for automatically and sequentially generating and displaying, and the input means move to a predetermined position outside the character frame on the display-integrated tablet.
A display for displaying a menu window for selecting various editing processes by touch input on the display-integrated tablet when the determination means and the second determination means determine that the input means has moved to the predetermined position. A control means is provided.

<Operation> When the operator sequentially writes the characters in the character frame displayed on the display-integrated tablet by using the input means, the determination means determines that the input means is based on the coordinate input signal from the display-integrated tablet. It is determined whether or not the character is moved from one character frame to the next character frame, and if it is determined that the character is moved to the next character frame, a signal is sent to the character frame addition generation means. Upon receiving this signal, the character frame additional generation unit generates and displays a new character frame at the end of the character frame displayed on the display-integrated tablet. In this way, each time the operator writes a character in each character frame, a new character frame is sequentially added and displayed, and the operator prevents the written characters or printed characters from being read by the character frame provided in a grid pattern on the entire screen. It is possible to smoothly write a character at an appropriate position without being displayed.

Next, when the operator finishes writing characters in one phrase in the character frame and moves the input means to a predetermined position outside the character frame on the display-integrated tablet, the second discriminating means causes the display-integrated tablet. It is determined that the input means has moved to the above-mentioned predetermined position based on the coordinate signal from, and a signal is sent to the display control means. Upon receiving this signal, the display control means displays the menu window on the display-integrated tablet. Thus, the operator selects the edit process (for example, conversion) in the menu window by touch input by the input means, and the selected edit process is performed on the character input by handwriting and recognized by the recognition unit. Is given. In this way, the operator can directly instruct on the screen the editing process that was performed by the complicated key operation on the conventional keyboard, and the editing process can be remarkably speeded up.
The operability of a word processor or the like can be greatly improved.

<Examples> Hereinafter, the present invention will be described in detail with reference to illustrated examples.

FIG. 1 is a schematic diagram of a handwritten character input word processor having a display-integrated tablet. A display-integrated tablet 1 includes a tablet 3 as an input unit equipped with a pen 2 as coordinate input means, and an EL4 as a display unit. And the word processor body 5 is connected to the tablet 3 and the EL 4 by an input signal line 6 and a display output signal line 7, respectively.

FIG. 2 is a block diagram of the word processor.
Reference numeral 1 is an AD converter for converting an analog signal representing the coordinates of the tip of the pen 2 input from the tablet 3 into a digital signal, 12 is a sampling means for sampling the digital signal from the AD converter 11 at a constant time period,
13 is a character pattern buffer for storing sampling data on the character frame 8 (see FIG. 1) that the pen 2 is currently writing, and 14 is this character pattern buffer 1.
A character recognition unit that compares the sampling data stored in 3 with a standard pattern and recognizes it as a character by comparing it, and 15 controls each block of the word processor, and corrects or deletes the recognition result based on the edit command signal from the tablet 3. , CPU that performs editing processing such as insertion, kanji conversion, etc., and stores the above recognition result and editing processing result in a built-in memory.
Reference numeral 6 denotes a character box generation unit that generates a character box pattern, displays a plurality of character boxes on the EL 4 in advance, and doubles as a character box addition generating unit described later.

The CPU 15 determines based on an input signal from the tablet 3 whether the tip of the pen 2 has moved from one character frame to the next character frame, and the pen tip has moved to the next character frame. When the determination is made, the first determination means for outputting a character frame generation signal to the character frame generation unit 16, and the tip of the pen based on the input signal is a predetermined position outside the character frame 8 on the EL 4 which is the display unit (see FIG. 5). 24)) and a second discriminating means for discriminating whether or not the operation has been shifted to.

Then, the character frame addition generation means of the character frame generation unit 16 receives the character frame generation signal and generates a new character frame at the end of the current character frame string and additionally displays it. Also, CPU1
Reference numeral 5 denotes a menu window for selecting various editing processes on the EL 4 by touch input with the pen 2 when it is determined by the second determining means that the tip of the pen has moved to the predetermined position (see FIG. 6 (a ))) Is also displayed.

The operation of the handwritten character input word processor having the above configuration will be described below with reference to FIG.

Prior to inputting characters to the tablet 3, in step S1,
Under control of the CPU 15, the character box generation unit 16 displays n character boxes at predetermined positions of the EL 4, such as after a sentence that has already been input. In step S2, the CPU 15 resets the character box counter that counts the number of the box being input to i = 1, and then in step S3, the coordinate point data of the pen tip input to the i-th character box of the tablet 3, that is, handwriting. The character information is stored in the character pattern buffer 13 via the AD converter 11 and the sampling means 12, and the detected coordinate point data is output to the EL 4 to display the trail of the pen tip in parallel. Next, in step S4, it is determined whether or not the pen tip is in the current character frame, i.e., the i-th character frame. If it is determined that the pen tip is in the i-th character frame, the coordinates of the pen tip in step S3 above. While continuing reading, if it is determined that the character is outside the i-th character frame, the process proceeds to step S5. In step S5, the character in the i-th frame in which the entry has been completed is recognized by the character recognition unit 1.
In step S6, the recognition result is replaced with the above handwritten character and displayed in EL4 in print. next,
In step S7, it is determined whether or not the pen tip is in the next character frame, that is, the (i + 1) th character frame, and if it is determined that the pen tip has moved to the (i + 1) th character frame, step S8 To increment the character box counter i, and then step S9
Then, after outputting a character frame generation signal to the character frame generation unit 16 to additionally display a new character frame at the end of the character frame string,
Returning to step S3, the same processing is repeated for the character written in the (i + 1) th character frame. On the other hand, if it is determined in step S7 that the pen tip is outside the (i + 1) th character frame, the character input ends with the ith character.

FIG. 4 shows the processing operation of steps S7 to S9 by changing the screen of EL4. When the "u" is entered in the i-th character frame, the pen tip is in the (i + 1) th character frame. When it moves to the X mark position, one new character frame is additionally displayed at the end of the character frame string as indicated by the arrow.

FIG. 5 is a diagram showing an example of the series of processing operations described above by changing the screen of EL4. First, n = 3 character frames are displayed after the typed text that has already been input (step S1),
The operator writes characters in the character frames with the pen 2 in order from the left. At this time, as shown in the figure, every time writing is moved to the next character frame, the handwritten character 21 written in the previous character frame is replaced with the type character 22 as the recognition result (step S6), and the character frame string New character frames 23 are added one by one at the end (step S9). Then, when the pen tip is finally placed outside the seventh character frame as shown by the cross mark 24, the character input (“kaijuga”) ends with the sixth character.

FIG. 6 shows the CP based on the command input from the tablet 3.
It is a figure explaining the edit process which U15 performs on the screen of EL4. When the operator finishes writing characters in the frame and points to the outside of the next character frame with the pen tip (x mark 24), a correction menu window as shown in Fig. 6 (a) is displayed near the entered character string. It Then, the entered character string is, for example, "kaijuga".
If the operator uses the pen 2 to instruct conversion in the correction menu, the entered character string is converted into Chinese characters and displayed as shown in FIG. 6 (b). In addition, when the operator indicates a desired item in the illustrated correction menu, the input character string can be corrected according to the item. On the other hand, when the operator starts writing characters in the next frame as shown in FIG. 6 (c), the correction mode is switched to the input mode.

FIG. 7 is a diagram illustrating another example of the editing process performed by the CPU 15. The operator uses the pen 2 to input the character string in Fig. 7 (a).
When the insertion symbol 25 is written as shown in Fig. 7, n = 3 character frames are inserted and displayed in this portion as shown in Fig. 7 (b). By writing a character with the pen 2 in this character frame, the 7th character frame is displayed. Figure
As in (c), the same processing as described above is performed.

As described above, according to the present invention, the display-integrated tablet 1 is provided with a function such as a menu key for displaying the correction menu, and the CPU 15 edits the recognition result based on the command input from now on. There is an advantage that the editing process which is performed by the complicated key operation of the keyboard can be remarkably speeded up by direct instruction on the screen, and the operability of the entire word processor can be greatly improved. Further, as one embodiment of the present invention, each time the operator writes a character in the character frame, a new character frame is sequentially added and displayed at the end of the character frame string consisting of a small number, so that the handwritten character It goes without saying that the written characters and the printed characters that are the recognition results are significantly easier to read than the conventional example, and the characters can be smoothly written in appropriate positions.

In the above embodiment, the number of character frames displayed in advance on the display unit is three, but it is needless to say that the number can be n (n ≧ 2). In the embodiment, the case of horizontal writing has been described, but vertical writing may be used, and the size, shape, and direction of the character frame are arbitrary. Further, the display unit of the display-integrated tablet of the present invention is not limited to the EL of the embodiment, and may be a liquid crystal or a CRT.

<Effects of the Invention> As is apparent from the above description, the handwritten character recognition device of the present invention determines whether the input means of the display-integrated tablet moves from one character frame on the tablet to the next character frame. When the determination means determines that the answer is affirmative, a new character frame is automatically generated and displayed at the end of the character frame by the character frame addition generation means, and the input means is displayed on the tablet. It is determined by the second determining means whether or not it has moved to a predetermined position outside the character frame of No., and when it is determined that it is affirmative, a menu for selecting various editing processes on the tablet by touch input by the display control means. Since the window is displayed, handwritten characters and printed characters that are recognition results are significantly easier to read than the conventional example in which a grid-shaped character frame was provided on the entire tablet surface. , You can smoothly enter characters on the appropriate position of the tablet, and the character recognition by the recognition unit can be facilitated, and you can edit by touch input on the screen instead of the conventional complicated key operation. The processing can be remarkably speeded up, and the operability of a word processor or the like can be greatly improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a handwritten character input word processor which is an embodiment of the present invention, FIG. 2 is a block diagram of this word processor, FIG. 3 is a flow chart showing the processing operation of the word processor, and FIGS. FIG. 7 is an explanatory diagram showing the above processing operation by changing the screen of the display unit. 1 ... Display-integrated tablet, 2 ... Pen, 3 ... Tablet, 4 ... EL (electroluminescence), 5 ... Word processor main unit, 14 ... Character recognition unit, 15 ... CPU, 16 ... Character Frame generator.

Claims (1)

[Claims] 1. Character information input by handwriting using an input means in a character frame displayed on a display-integrated tablet,
In a handwritten character recognition device that recognizes a character by a recognition unit under the control of a processor and outputs the recognition result to the display-integrated tablet, whether the input means moves from one character frame to the next character frame. And a first discriminating means for discriminating whether or not the input means has moved from one character frame to the next character frame by the first discriminating means. Character frame additional generation means for automatically automatically generating and displaying, and second determination means for determining whether or not the input means has moved to a predetermined position outside the character frame on the display-integrated tablet, and the second determination Display control for displaying a menu window for selecting various editing processes by touch input on the display-integrated tablet when it is determined by the means that the input means has moved to the predetermined position A handwritten character recognition device comprising means.