JPH06180772A - Hand-written input character recognizing system - Google Patents

Abstract

PURPOSE:To make it possible to easily input a complicated 'KANJI' (Chinese character) by the smaller number of pictures without requiring previous operation by recognizing a writing order preceding part. CONSTITUTION:A writing order recognizing part 52 in a character recognizing program 5 refers to a writing order preceding part recognizing dictionary 10 on the way of the hand-writing input of a 'KANJI' plotted on a tablet 1 by a pen 2 to recognize the writing order preceding part. When the writing order preceding part is recognized by the means 52, a candidate 'KANJI' display means 61 in a system control program 6 displays a 'KANJI' indicated by the index of the writing order preceding part and registered in a writing order preceding part index table 11 on the tablet 1 as a candidate 'KANJI', a determinate 'KANJI' selecting means 62 selects a determinate 'KANJI' from the displayed candidate 'KANJI's and a determinate 'KANJI' registering means 63 registers the selected determinate 'KANJI' in the table 11 by using the index of the writing order preceding part as a key.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handwritten input character recognition system, and more particularly to a handwritten input character recognition system for easily inputting Chinese characters.

[0002]

2. Description of the Related Art Conventionally, in this type of handwritten input character recognition system, in order to recognize a handwritten input character,
The whole character had to be input by handwriting (for example, JP-A-3-10390 and JP-A-3-1767).
23, etc.). Note that there is already known a registration function in which a handwritten abbreviation and a complicated character are linked to each other so that the complicated character can be input only by the abbreviation.

As shown in FIG. 8, a conventional general handwriting input character recognition system includes a tablet 1 as a coordinate input device, a pen 2 for instructing coordinates on the tablet 1 to input characters, and a tablet 1. A tablet control unit 3 that controls detection and display of coordinates designated by the pen 2, a central processing unit (hereinafter abbreviated as CPU) 4 that controls the entire system, a character recognition program 5, and a system control program. 6, a coordinate data storage unit 7 for storing coordinate data of strokes drawn on the tablet 1 with the pen 2,
A character recognition dictionary 8 that stores character patterns and character codes (JIS code, ASCII code, etc.) for performing character recognition based on the coordinate data stored in the coordinate data storage unit 7, and the recognized character is an operator. And the external output device 9 which is output in response to the confirmation instruction.

In such a conventional handwriting input character recognition system, when a character is drawn on the tablet 1 with the pen 2, the system control program 6 reads the coordinate data of the stroke by the tablet controller 3 and the coordinate data storage unit 7 is read. To record. Then, based on the handwritten coordinate data recorded in the coordinate data storage unit 7, the character recognition program 5 compares and collates the handwritten pattern and the character pattern of the character recognition dictionary 8 by the structure analysis method, the matching method, or the like, and the similarity is obtained. Character recognition is performed by reading the character code of the character pattern to be read from the character recognition dictionary 8.

[0005]

In the above-mentioned conventional handwriting input character recognition system, it is generally impossible to input a desired character by the operator unless the entire character is input by handwriting. There is a problem that it takes more time to input such complicated characters than inputting from a keyboard of a normal computer.

Further, if there is no such thing as the abbreviation registration function as described above, it is impossible to input a complicated Kanji with a smaller number of strokes, and even if the abbreviation registration function is provided, the operator can use it. It is necessary to explicitly connect the abbreviation and the character, and there is a problem that the abbreviation is not automatically registered.

In view of the above points, the object of the present invention is to draw the first part of the kanji (hereinafter referred to as the stroke order leading part. Specifically, the deviation of the kanji, the crown, etc. are often applicable, but it is not essential. It is not always the radical), and without the need for prior operation such as registering an abbreviation,
An object of the present invention is to provide a handwriting input character recognition system that enables easy input of complicated kanji with a smaller number of strokes.

[0008]

A handwritten input character recognition system according to the present invention is a handwritten input character recognition system for recognizing a character input by handwriting based on coordinate data designated by a pen. A stroke order leading part recognition dictionary that stores an index, a stroke order leading part index table that registers Kanji using the index of the stroke order leading part as a key, and a stroke order leading part that refers to the stroke order leading part recognition dictionary during handwriting input of Chinese characters And a kanji character registered in the stroke order preceding part index table indicated by the index of the stroke order preceding part when the stroke order preceding part is recognized by the stroke order preceding part recognition means is displayed as a candidate kanji. A candidate kanji display means to be displayed and a confirmed kanji from among the candidate kanji displayed by this candidate kanji display means It has a definite kanji selecting means for selecting, a confirmation kanji registration means for registering the determined kanji selected by this determined kanji selecting means to the stroke order preceding section index table index of the stroke order preceding section as the key.

[0009]

In the handwriting input character recognition system of the present invention, the stroke order leading part recognition dictionary stores the pattern and index of the stroke order leading part, and the stroke order leading part index table registers Kanji using the index of the stroke order leading part as a key. The leading part recognition means refers to the stroke order leading part recognition dictionary in the middle of handwriting input of kanji to recognize the stroke order leading part, and when the candidate kanji display means recognizes the stroke order leading part by the stroke order leading part recognition means, the stroke order leading part is recognized. The kanji registered in the stroke order preceding part index table indicated by the index of the preceding part is displayed as a candidate kanji, and the confirmed kanji selection means selects the confirmed kanji from the candidate kanji displayed by the candidate kanji display means,
The definite kanji registration means registers the definite kanji selected by the definite kanji selection means in the stroke order leading part index table using the index of the stroke order leading part as a key.

[0010]

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit block diagram showing the configuration of a handwriting input character recognition system according to an embodiment of the present invention. The handwriting input character recognition system of the present embodiment detects a tablet 1 as a coordinate input device, a pen 2 for inputting characters by instructing coordinates on the tablet 1, and detection of coordinates instructed by the pen 2 on the tablet 1. And a tablet control unit 3 for controlling the display, a CPU 4 for controlling the entire system,
Character recognition program 5 and system control program 6
And a coordinate data storage unit 7 for recording coordinate data of strokes drawn with the pen 2 on the tablet 1, and a character pattern of characters for character recognition based on the coordinate data stored in the coordinate data storage unit 7. And character recognition dictionary 8 for storing character codes (JIS code, ASCII code, etc.)
And the external output device 9 that outputs the recognized character upon the operator's confirmation instruction as a trigger, and the stroke order leading portion for recognizing the stroke order leading portion based on the coordinate data stored in the coordinate data storage unit 7. The main part is composed of a stroke order leading part recognition dictionary 10 for storing patterns and indexes, and a stroke order leading part index table 11 for storing Chinese characters using the index of the stroke order leading part as a key. In addition, the same code | symbol is attached | subjected and shown to the part corresponding to the conventional handwriting input character recognition system shown in FIG.

The tablet 1 has not only a function as a coordinate input device but also a function as a display device, that is, a stroke line drawn on the tablet 1 by the pen 2 as in the case of a general handwriting input tablet. Function to
It also has the function of displaying the recognition result. As shown in FIG. 2, the tablet 1 is provided with five character input divisions 1a to 1e and a Chinese character selection division 1f for displaying and instructing a plurality of candidate Chinese characters. Note that the number of character input divisions is not limited to five, and in the handwriting input character recognition system of the present embodiment, it is necessary to instruct the end of the previous character input at the start of the next character input, so at least two. I wish I had it.

The character recognition program 5 refers to the character recognition means 51 for recognizing characters by referring to the character recognition dictionary 8 after the handwriting input of Chinese characters and the stroke order preceding portion recognition dictionary 10 during the inputting of Chinese characters by handwriting. And a stroke order leading portion recognition means 52 for recognizing the stroke order leading portion.

The system control program 6 displays the Chinese characters registered in the stroke order leading section index table 11 indicated by the index of the stroke order leading section when the stroke order leading section recognition means 52 recognizes the stroke order leading section as candidate Chinese characters. Candidate kanji display means 61 and candidate kanji display means 61
The fixed kanji selecting means 62 for selecting a fixed kanji from the candidate kanji displayed by and the fixed kanji selected by the fixed kanji selecting means 62 is registered in the stroke order leading part index table 11 using the index of the stroke order leading part as a key. And a fixed kanji registration means 63 for performing.

Referring to FIG. 3, the stroke order leading portion index table 11 stores a plurality of Chinese characters in the entry indicated by the index of the stroke order leading portion together with the usage frequency counter.

Referring to FIG. 4, the process of the handwriting input character recognition system of this embodiment is performed by the pen-down determination step S.
1, character input section determination step S2, coordinate data recording step S3, pen-up determination step S4,
Stroke order leading part recognition step S5, stroke order leading part recognition determination step S6, candidate kanji display step S7, character input end determination step S8, candidate kanji selection determination step S
9, pen-up determination step S10, character recognition step S11, recognition result display step S12, recognized character confirmation determination step S13, selection result display step S
14, a stroke order leading part index table updating step S15, a character output step S16, and a confirmed character erasing step S17.

Next, the operation of the handwritten input character recognition system of the present embodiment thus constructed will be described.

When the character recognition process is started, the system control program 6 first determines whether or not the pen 2 has come into contact with the tablet 1 for character input (step S1). Step S1 is repeated until the pen is down.

When it is determined that the pen is down, the system control program 6 determines which partition on the tablet 1 is pen down by the tablet controller 3 (step S2). When there is a pen-down in the character input section 1a to 1e, the system control program 6 detects the coordinate data of the place where the pen 2 is in contact with the tablet 1 by the tablet control unit 3, and the coordinate data storage unit 7 is recorded (step S3).

Next, the system control program 6 determines whether or not the pen 2 has moved up from the tablet 1 (step S4), and if the pen 2 remains down, the coordinate data is recorded again in step S3. In this way, the system control program 6 stores the coordinate data with which the pen 2 contacts until it is determined to be pen-up in the coordinate data storage unit 7, and the stroke drawn by the pen 2 on the tablet 1 is shown in FIG. Display as illustrated.

If it is determined in step S4 that the stroke is pen-up, it means that one stroke of a character has been input as a stroke. Therefore, the system control program 6 causes the stroke order leading portion recognizing means 52 of the character recognizing program 5 to recognize the stroke. Based on the coordinate data recorded in the coordinate data storage section 7, recognition processing of the stroke-order preceding section is performed (step S5).

The stroke order leading portion recognition means 52 compares and collates the handwritten pattern recorded in the coordinate data storage unit 7 with the pattern in the stroke order leading portion recognition dictionary 10 by a structure analysis method, a matching method, or the like, and a similar pattern. The stroke order leading portion is recognized by reading the index of from the stroke order leading portion recognition dictionary 10.

After the stroke-order leading portion recognition processing by the stroke-order leading portion recognizing means 52, the system control program 6 determines whether or not the stroke-order leading portion is recognized based on whether or not the index is read (step S6). . If the stroke order preceding part is recognized, the system control program 6
6 reads all the kanji stored in the entry of the stroke order leading portion index table 11 indicated by the recognized stroke order leading portion index by the candidate kanji display means 61 in descending order of the value of the usage frequency counter, and FIG. As illustrated, the characters are arranged in the kanji selection section 1f and displayed as candidate kanji (step S7). When it is not recognized as the stroke preceding portion in step S6, the system control program 6 skips step S7.

Next, the system control program 6 determines the end of character input (step S8). Generally, the end of character input is determined by whether a certain time has elapsed from pen-up, or by setting a hardware button in the system that instructs the end of character input and pressing that button. The method of determining whether or not a certain area on the tablet has been pen-downed to that button as a software button, or when the next character input is started There is a method of judging that the input is completed, and the handwriting input character recognition system of the present embodiment adopts the method of and. That is, when a certain time has elapsed from the pen-up in step S8, or
When there is pen down again in the character input section other than the character input section that is pen-downed first in 2 (start of input of the next character), the system control program 6 determines that the character input is completed, and in step S11, Proceed to character recognition processing. If it is determined that the character input has not ended, the system control program 6 returns control to the process of step S2 again.

When it is determined in step S2 that the pen-down is being performed in a region other than the character input partition parts 1a to 1e, the system control program 6 is displayed on the kanji character selection partition part 1f in step S7 by the fixed kanji character selection means 62. It is determined whether one of the selected candidate kanji has been designated as a confirmed kanji by pen-down, that is, has been selected (step S9). When one of the candidate Chinese characters in the Chinese character selection section 1f is selected as the fixed Chinese character, the system control program 6 causes the fixed Chinese character selecting unit 62 to
As shown in FIG. 7, the selected confirmed Chinese character is displayed as a selection result in the character input section where the character on the tablet 1 is input (step S14). At that time, in the handwritten input character recognition system of the present embodiment, strokes drawn by handwriting and candidate Chinese characters in the Chinese character selection partition section 1f are erased. After this, the system control program 6 executes step S
Transfer control to 15.

If no candidate kanji is selected in step S9, the system control program 6 proceeds to loop processing until pen up again (step S10).
In the handwritten input character recognition system of the present embodiment, when there is a pen down other than an effective section on the tablet 1, the process of step S10 is present in order to ignore the coordinate data designated by the pen 2 until there is a pen up. . When the pen-up is performed in step S10, the system control program 6 shifts the control to step S8.

When the end of character input is determined in step S8, the system control program 6 causes the character recognition means 51 of the character recognition program 5 to recognize the character recognition dictionary 8 based on the coordinate data recorded in the coordinate data storage unit 7. The character recognition processing is performed by referring to (step S11).

The character recognition means 51 includes a coordinate data storage unit 7
The handwritten pattern recorded in the above and the character pattern in the character recognition dictionary 8 are compared and collated by a structure analysis method, a matching method or the like, and a character code of a similar character pattern (JIS
The character is recognized by reading the code, ASCII code, etc.) from the character recognition dictionary 8.

Next, the system control program 6 displays the recognized character as a recognition result in the character input section where the character on the tablet 1 has been input with a character pattern corresponding to the recognized character code (step S12). ). At that time, in the handwriting input character recognition system of the present embodiment, the stroke drawn by handwriting is erased.

When the character is recognized and displayed, the system control program 6 carries out a judgment process as to whether or not to confirm the recognition result (step S13). Since the current handwriting recognition technology does not recognize characters 100% correctly, a general handwriting input character recognition system is provided with a process for instructing whether or not a person is finally recognized correctly. ing. Confirmation of the recognized character is performed by setting the method of deciding that the previously recognized character has been confirmed when the next character input is started, or setting the hardware button to instruct the recognition confirmation in the system. There is a method of determining whether or not a button has been pressed, or a method of determining whether or not the area on the tablet has been pen downed as a software button. In the handwritten input character recognition system of this embodiment,
Method is adopted.

When the character recognized in step S13 is confirmed or after the confirmed kanji is displayed in step S14, the system control program 6 causes the confirmed kanji registration means 63 to execute the stroke order leading part index table by the confirmed kanji. 11 is updated (step S15). More specifically, if the fixed Chinese character exists in the entry of the stroke order leading portion index table 11 indicated by the stroke order leading portion index, the fixed Chinese character registration unit 63 performs a process of adding 1 to the usage frequency counter associated with the fixed Chinese character. , If it does not exist in the entry of the stroke order leading part index table 11, the stroke order leading part index table 11
Performs a new registration process for confirmed kanji. Note that step S
The process of 15 is performed only when the confirmed character is a Chinese character.

Next, the system control program 6 performs the output process of the fixed character to the external output device 10 (step S).
16).

Finally, the system control program 6 carries out a process of erasing the fixed characters displayed in the character input partition sections 1a to 1e on the tablet 1 (step S17), and returns to the start of input processing of the next character.

[0034]

As described above, according to the present invention, the stroke order leading part recognition dictionary, the stroke order leading part index table, the stroke order leading part recognition means, the candidate kanji display means, the fixed kanji character selection means, and the fixed kanji character registration means are provided. Allows the Kanji characters entered by the operator to be automatically stored using the index of the stroke order leading portion as a key, and the Kanji candidates by the stroke order leading portion are displayed in the middle of handwriting input of Kanji, and the Kanji character is selected from the candidate Kanji characters. Therefore, there is an effect that a complicated kanji character can be easily input without handwriting the entire kanji character without requiring a prior operation.

Further, since the displayed candidate Chinese characters are displayed in the order of frequency of use used by the operator, there is an effect that the learning function provides a handwritten input character recognition system suitable for the operator.

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing a configuration of a handwriting input character recognition system according to an embodiment of the present invention.

FIG. 2 is a front view showing an example of the tablet in FIG.

FIG. 3 is a diagram exemplifying the contents of a stroke order leading part index table in FIG.

FIG. 4 is a flowchart showing the processing of the handwriting input character recognition system of the present embodiment.

FIG. 5 is a diagram illustrating a state where characters are being input with a pen on the tablet in FIG. 2;

FIG. 6 is a diagram illustrating an example of a state where candidate kanji is displayed on the tablet of FIG.

FIG. 7 is a diagram illustrating a state in which confirmed Chinese characters are displayed on the tablet of FIG.

FIG. 8 is a circuit block diagram showing an example of a conventional handwriting input character recognition system.

[Explanation of symbols]

 1 tablet 1a to 1e character input partition 1f Chinese character selection partition 2 pen 3 tablet controller 4 CPU 5 character recognition program 6 system control program 7 coordinate data storage 8 character recognition dictionary 9 external output device 10 stroke order preceding part recognition dictionary 11 Stroke order leading part index table 51 Character recognition means 52 Stroke order leading part recognition means 61 Candidate kanji display means 62 Confirmed kanji selection means 63 Confirmed kanji registration means

Claims (2)

[Claims] 1. A handwriting input character recognition system for recognizing a character input by handwriting based on coordinate data designated by a pen, and a stroke order leading part recognition dictionary storing a pattern and an index of a stroke order leading part, and a stroke order leading part. The stroke order leading part index table for registering Chinese characters using the index of as a key, the stroke order leading part recognition means for recognizing the stroke order leading part by referring to the stroke order leading part recognition dictionary during handwriting input of kanji, and this stroke order leading part A candidate kanji display means for displaying, as a candidate kanji, the kanji registered in the stroke order leading part index table indicated by the index of the stroke order preceding part when the recognition means recognizes the stroke order leading part, and the candidate kanji display means for displaying. The fixed kanji selecting means for selecting the fixed kanji from the selected candidate kanji, and the fixed kanji selecting hand. A handwritten input character recognition system, comprising: fixed kanji registration means for registering a fixed kanji selected by a column in the stroke order preceding part index table using the index of the stroke order preceding part as a key. 2. The handwritten input character recognition system according to claim 1, wherein said fixed kanji character registration means rearranges and registers the kanji characters in said stroke order leading part index table in the order of frequency of use.