JP2902182B2 - Online handwritten character recognition 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 device, and more particularly to a technique for reducing the input load of an online handwritten character recognition device for immediately recognizing input handwritten characters.

[0002]

2. Description of the Related Art Online handwritten character recognition devices for instantly recognizing handwritten characters have begun to spread. The online handwritten character recognition device sequentially recognizes written characters such as kanji and hiragana based on handwriting information and takes in the input character string. There is also an online handwritten character recognition device that recognizes only hiragana, converts it to kanji by using kana-kanji conversion technology, and inputs a sentence.

[0003]

When inputting Japanese using such an online handwritten character recognition device, a function of inputting Chinese characters is essential. Inputting characters including kanji by handwriting is a direct and easy-to-use method as in the case of writing sentences by handwriting. However, in this case, it is necessary to write all the characters accurately, which is accompanied by physical fatigue. In particular, when inputting Chinese characters, there are characters with a large number of strokes, and the input efficiency is not so high.

[0004] In order to solve such a problem, it has been attempted to input only hiragana by hand and use a kana-kanji conversion technique. This method is advantageous in terms of fatigue because there is no need to input kanji. However, there is a problem in that the steps are not directly performed and are somewhat inconvenient to use because of the steps of kana-kanji conversion.

[0005] In addition, when performing kana-kanji conversion, a dictionary for the conversion is required, and a considerable capacity is required. This capacitance should be as small as possible. In particular, the use of Katakana and the like is newly started or stopped, and it is not very useful to include them in the dictionary. However, it is preferable that the input is made as efficient as possible for Katakana.
Also, in the conventional kana-kanji conversion, when there are a plurality of word candidates for the same reading, the candidate words are sequentially switched and displayed by pressing a specific key, and a desired word is displayed. When selecting by pressing other specific keys. Such operations are complicated in a handwritten character input device, and improvement thereof has been desired.

Accordingly, an object of the present invention is to provide an online handwritten character recognition capable of inputting a kanji or a character string mixed with kanji hiragana or a katakana character string with high efficiency. It is to provide a device.

Another object of the present invention is to improve the efficiency of input and to reduce the capacity of a dictionary required for input.

[0008]

An object of the invention described in claim 3, without using the kana-kanji conversion, and to provide an online handwritten character recognition device capable of inputting characters including Kanji with less input. An object of the invention described in claim 4 is to provide a kanji or a kanji flat.
It is possible to input characters with mixed kana with high efficiency.
An object of the present invention is to provide an online handwritten character recognition device.

[0010] An object of the invention described in claim 5 is to efficiently input characters including kanji and katakana, and to input characters including kanji with a small number of input characters. The present invention provides an online handwritten character recognition device that can easily select one of the following.

[0011]

An online system according to claim 1, wherein:
In handwriting recognition apparatus includes an input means for inputting an online handwritten character string and a predetermined signal is input
And recognition means for recognizing a character string, the recognized character
If the column is a Kanji or Kanji Hiragana mixed string,
Convert recognized kanji or kanji flat kana string to hiragana character string, in association with the number of hiragana characters predetermined from the head of the converted hiragana character string, the recognized kanji
Or a kanji character for storing character strings mixed with kanji
The other is the Chinese character hiragana mingled character string storage means, recognized sentence
If the string is a katakana character string, the recognized katakana
A predetermined number of Katakana characters from the beginning of the character string
For associating with a recognized katakana character string
Katakana character string storage means and input by input means
If characters are hiragana characters, in response to input hiragana characters and Jo Tokoro signal, kanji or kanji Hiragana
Character searching string storage means, the inputted hiragana characters and hiragana associated with a character or Kanji Kanji matching mixed
And means for taking out a flat kana string, to the input means
If the input characters are katakana characters,
In response to the Katakana characters
Search the kana character string storage means and input katakana characters
Katakana characters associated with katakana characters that match
And means for taking out the string, and a display means for displaying the retrieved kanji flat kana string or katakana character string.

[0012]-line handwritten character recognition system of claim 2, a line handwritten character recognition apparatus according to claim 1, kanji or kanji hiragana mingled character string storage means, kanji or kanji Rights kana string the stores in association with specific hiragana character string, respectively, kanji or kanji Rights kana string given include corresponding flat <br/> dictionary for converting kana character string, the Each dictionary
Maximum length of hiragana character string, characterized in that it is a constant notwithstanding the length of each Chinese character or Kanji flat temporary <br/> name mingled string.

[0013]

[0014]-line handwritten character recognition apparatus according to claim 3, line handwritten kanji or kanji flat input means for inputting a kana character string and the predetermined signal, is input by the input means kanji or kanji hiragana Recognition means for recognizing mixed character strings and recognized Chinese characters
By detecting the word boundary of the character or graphic Rights kana character string, a character string resolving means for resolving the recognized kanji or kanji Rights kana string into words, each word to be output string resolving means was converted to the corresponding hiragana character string, each single <br/> word, a word storage means for storing in association with the number of characters specified in advance from the beginning of the corresponding hiragana character string is input by the input means It was in response to the hiragana character string and Jo Tokoro signal, searches the word storage means, and means for retrieving the words associated with the characters matching the entered hiragana character string, the retrieved word Display means for displaying. The online handwritten character recognition device according to claim 4.
Input online handwritten character strings and predetermined signals
Input means for recognizing the input character string
And the recognized character string is kanji or kanji
If the character string is mixed with names, the recognized kanji or kanji
Converts a character string mixed with Hiragana into a Hiragana string,
A predetermined number of hiragana characters from the beginning of the hiragana character string
Recognized kanji or mixed with kanji hiragana
Kanji or Kanji Hiragana character string notation for storing character strings
Characters input by the input means and Hiragana characters
Is entered, the input hiragana character and the specified
Character strings stored in kanji or kanji hiragana in response to the issue
Searches for means and matches hiragana characters entered
Kanji or Kanji mixed hiragana characters associated with the character
Mixing means for extracting columns and extracted Kanji Hiragana
Display means for displaying a character string.

[0015] Online <br/> handwritten character recognition apparatus according to the invention described in claim 5 is the line handwritten character recognition apparatus according to any one of claims 1 to 4, display means, input Window display means for displaying the searched character string or word in a window in association with a predetermined input area of the means, wherein the input means selects and inputs any of the character string or word displayed in the window with a pen touch Means.

[0016]

[Action] In-line handwritten character recognition apparatus according to claim 1, recognized kanji or kanji Rights kana string is converted into hiragana character string, number specified in advance from the beginning of the hiragana character string after conversion Han in association with the hiragana characters
It is stored in the character string storage means mixed with characters or kanji hiragana . Similarly, the recognized katakana character string is
A katakana character string description linked with a predetermined number of katakana characters
It is stored in storage means. When hiragana characters and Jo Tokoro signal by the input means is inputted, Chinese character or Kanji Hiragana mixed
From Jiri character string storage means, kanji or kanji Rights kana string associated with the hiragana characters matching the entered hiragana characters are displayed retrieved. Also by the input means
When a Katakana character and a predetermined signal are input,
Katakana sentence stored in association with the written katakana characters
The character string is retrieved from the katakana character string storage means and displayed.
You. Therefore kanji, or Chinese characters flat kana string or
Other katakana character string is displayed is retrieved by entering only hiragana characters or katakana characters having the predetermined respectively.

[0017] In online <br/> handwritten character recognition apparatus according to the invention of claim 2, flat provisionally recognized kanji or <br/> kanji Rights kana character string, which corresponds with dictionary <br / > name is converted to a string, is stored in the kanji or kanji hiragana mingled character string storage means in association with the flat temporary <br/> name character having the predetermined from the head. At this time, the length of the hiragana character string to be converted by the dictionary, kanji or kanji is inputted
Is constant regardless of the length of the flat kana string, Han
Requires less capacity of the dictionary are compared with the case of converting all the readings shaped or kanji Rights kana string in the appropriate hiragana character string. When hiragana characters and Jo Tokoro signal by the input means is input, the Chinese character or Kanji Hiragana mingled character string storage means is searched for the inputted hiragana characters as a key, the corresponding kanji or kanji Rights kana string Retrieved and displayed.

[0018]

[0019] In-line handwritten character recognition apparatus according to claim 3, recognized kanji or kanji Rights kana string the word boundary is detected and further decomposed into words. The decomposed word is stored in the word storage unit in association with a predetermined number of characters from the beginning. The character and Jo Tokoro signals are input by the input means, word corresponding to the character is displayed retrieved from the word storage means. The online handwritten character recognition according to claim 4.
In the device, recognized kanji or mixed kanji hiragana
String is converted to a hiragana string, and the converted hiragana sentence
Associated with a predetermined number of hiragana characters from the beginning of the string
Kanji or Kanji Hiragana mixed character string storage means
You. Hiragana characters and predetermined signals are input by input means.
When input, the hiragana sentence input from the character string storage
Kanji or Kanji associated with the Hiragana character that matches the character
The character string mixed with Hiragana is extracted and displayed. Accordingly
Kanji or kanji hiragana mixed character strings
Search by entering only the specified number of hiragana characters
Is displayed.

[0020] In-line handwritten character recognition apparatus according to claim 5, recognized kanji or kanji Rights kana string Kanji also in association with the number of characters specified in advance
Is character string storage means or word storage means mixed with kanji hiragana
Is stored . The structure according to claim 1 or 2
Online handwritten character recognition devices that include
In addition, the recognized katakana character string is
Is stored in the katakana character string storage means in association with the character.
When Hiragana or Katakana and Jo Tokoro signal by the input means is input, character or Kanji Kanji Hiragana mingled statement <br/> string storage means, any of the word storage means and the katakana character string storage means is inputted the searches as a key, kanji, or Chinese characters flat kana string or words or katakana character string corresponding to the character is displayed. In this case a plurality of kanji or kanji Rights kana string, if the word or katakana character string, present these are display window can be input by selecting the one with pen touch.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A handwritten character recognition apparatus according to one embodiment of the present invention will be described below as an example of an apparatus for sequentially inputting characters mixed with kana into a character frame on a display-integrated tablet. However, this device is merely an example of the present invention and should not be taken in a limiting sense. For example, the present invention can be applied to a handwritten character input device without a character frame for input. In the following embodiment, kanji / kana conversion is performed collectively after a set of character strings is input. However, kanji / kana conversion processing is sequentially performed each time an input character is recognized one by one. Examples are possible.

FIG. 1 is a block diagram of a handwritten character input device which is an example of a handwritten character recognition device according to the present invention.
Referring to FIG. 1, this device recognizes a display-integrated tablet 1 as input means and display means, and handwritten character information provided from display-integrated tablet 1 according to a predetermined method. 1. A handwritten character recognizing unit 2 for determining whether or not a specific control button has been input from 1 and outputting the same, and controls the entire apparatus according to a predetermined procedure based on information such as the recognized characters and control buttons. A CPU (Central Processing Uni) 3 that operates according to a predetermined program, and a kanji / kana conversion dictionary 4 that is connected to the CPU 3 and converts words contained in the input character string from kanji to kana characters. C
Connected to the PU3 for storing a word associated with one hiragana or katakana character as an index, storing a word associated with the one hiragana or katakana character, and searching for and outputting a corresponding word when given one hiragana or katakana character In order to output a katakana word corresponding to one given katakana character, storing a kana / word search table 5 and a corresponding katakana word attached to the kana / word search table 5, using one katakana character as an index A kanji / word search table 6 connected to the CPU 3 for storing a corresponding word using one kanji as an index and outputting a word corresponding to the given one kanji; CP for storing necessary information such as a program to be executed and text data and display data And a memory 7.

The display-integrated tablet 1 is a panel-shaped coordinate input device. The display-integrated tablet 1 outputs information such as pen-up, pen-down, and pen coordinates to the handwritten character recognition unit. The display-integrated tablet 1 also displays text data, handwriting data, recognition results, and the like under the control of the CPU 3.

The handwritten character recognition unit 2 recognizes kanji and kana characters based on pen information and coordinate information provided from the display-integrated tablet 1, and determines whether a control button of the display-integrated tablet 1 has been pressed. Check. The handwritten character recognition unit 2 provides the CPU 3 with a recognition result, button information, and the like.

The kana / kana conversion dictionary 4 is referenced by the CPU 3 when converting words from kanji to kana characters. The kanji / kana conversion dictionary 4 includes a kanji / kana conversion dictionary table and a kanji / kana conversion dictionary index as shown in FIG. Referring to FIG. 2B, the kanji kana conversion dictionary table includes pairs of words and readings stored in order from address 000000. Word numbers 00001 to are assigned to each word in ascending order. The reading assigned to each word is one character in this embodiment. In FIG. 2B, as an example, the word “recognition” is stored at the address X, and the word number is J. Further, the word "recognition" referred later is stored two times after "acknowledgment",
It is assumed that the word number is J + 2.

The Kanji Kana conversion dictionary index is a table for speeding up access to the Kanji Kana conversion dictionary table. As shown in FIG. 2A, the Kanji Kana conversion dictionary index contains a certain Kanji, a start address indicating from which address in the Kanji Kana conversion dictionary table a word starting with the Kanji is stored, and a start address indicating the start address. A set including a word number assigned to a word stored in an address is created in advance for each kanji. By using this Kanji Kana conversion dictionary index, given a certain Kanji, the start address and word number of a word starting with the Kanji can be known. The Kanji-Kana conversion dictionary table is read from the start address to search for a target word, so that the reading given to the word can be known. In this way, it is possible to convert the input character string into one-letter kana reading at high speed.

The kana / word search table, as shown in FIG. 8 (a), includes the word number of the input word given in the kanji kana conversion dictionary table and the first character of the reading of the word. A plurality of index sets are stored. At this time, in the case of katakana, the index is also the first katakana character. Katakana is not stored in the Kanji / Kana conversion dictionary 4, and therefore, a word number different from the word number in the Kanji / Kana conversion dictionary table is given. The word number given to the katakana is the number on the katakana table 8. The fact that the index is katakana can be easily determined from its character code, and it is easy to see that the corresponding character string is stored in the katakana table 8.

Referring to FIG. 8B, katakana table 8 can store a plurality of character strings composed of katakana. Each character string is given a number from 0 in ascending order.

Referring to FIG. 8 (c), the kanji / word search table 6 stores one kanji character as an index and the word number in the kanji kana conversion dictionary table of the word associated with the kanji. Includes multiple sets. An END mark is added at the end of this set of the kanji / word search table.

The character recognition processing of the handwritten character input device according to the present embodiment will be described below. Regarding what is used for the method for recognizing handwritten characters, there is no direct relation to the present invention, and any method such as a patterning matching method and a basic stroke method may be used.

The handwritten character recognition unit 2 performs recognition processing, display of a recognition result, selection of candidates, and the like, independently of the CPU 3, using the display-integrated tablet 1. The process at this time is performed interactively using a display screen as shown in FIG. Referring to FIG. 3, the display screen of display-integrated tablet 1 includes a text display screen 9 in which the text of the input text is displayed, and handwritten characters are input one by one, and the recognized characters are displayed. Six character frames 10a to 10f and "recognition"
The function keys 11 for “shortcut”, “cancel”, and “fix” are used separately. After being activated by the CPU 3, the handwritten character recognizing unit 2 executes the “confirmation” and “shortening” shown in FIG.
Until the user touches the three types of buttons of “end” (not shown) with a pen (called pen touch), the processing is performed without involvement of the CPU 3.

The function key 11 will be described below.
The “recognition” key is a key that is pressed when a handwritten character is written in any of the character frames 10a to 10f and then the character is recognized. The "shortcut" key is a key used when converting an input character into a character string. By inputting one character in the character frame 10a and pressing a shortcut key, a word associated with the character is searched for and displayed. When the shortcut key is pressed, the recognition result of up to six characters input so far is returned to the CPU 3, and the handwritten character recognition unit 2 is stopped. When the handwritten character recognition unit 2 is in a stopped state, transmission and reception of tablet data and display data of the display-integrated tablet 1 are performed with the CPU 3.

The "cancel" key is used for canceling the input character string and re-entering it. The “confirm” key is a key used to select one of a plurality of candidate results obtained by searching for a character string associated with an input character by using a shortcut key. Even when the enter key is pressed, the recognition result is returned to the CPU 3 as in the case of the shortcut key, and the handwritten character recognition unit 2 is stopped.

In the following, when the sentence "Recognition method in online character recognition device. What is online recognition ..." is entered using the handwritten character input device of the present embodiment mixed with kanji and kana, the operation and the operation of the device will be described. The operation will be described.

(1) Referring to FIG. 4, first, “O / N / RA / Y / N” is displayed on the display-integrated tablet 1 with the character frame 10.
Write one character at a to 10e. Handwritten character recognition unit 2
Performs a recognition process for each character frame and displays the recognition result in the corresponding character frame. In FIG. 3, up to “a” are recognized, and the last “n” is being recognized.

(2) After the input and recognition of the five characters are completed and the display of the recognition result is confirmed, the operator touches the "OK" key with a pen. In response, the recognition result is provided from the handwritten character recognition unit 2 to the CPU 3. At this time,
The information on the pressing of the "OK" key is also stored in the CPU 3.
Given to. The handwritten character recognizing unit 2 erases the recognition result and enters a stop state.

(3) The CPU 3 controls the handwritten character recognition unit 2
The recognition result given from is taken in the text and displayed. The appearance of the display is shown in FIG. The CPU 3 simultaneously creates a kana-word search table and a katakana table based on the recognition result. In this case, it is assumed that no word is stored in the katakana table before this. As shown in FIG. 6B, the character "online" is stored in the number 0 part of the katakana table. As shown in FIG. 6 (a), the kana / word search table stores the first letter "o" of the word "online" and the number of the katakana table in which the word "online" is stored. “0” is stored as a set. This is because katakana is not stored in the kanji / kana conversion dictionary 4 in order to increase the efficiency of the dictionary, and information for searching the kanji / kana conversion dictionary cannot be obtained. That is, the actual character string is stored in the katakana table 8, and the kana / word search table 5 contains the index and the number of the katakana table 8 containing the character string corresponding to the index. The maximum length of a character string that can be stored in the katakana table 8 is a fixed length of 6 characters in the case of the present embodiment because the maximum number of characters that can be fixedly input at a time is 6 characters.

(4) Next, "sentence / character / recognition / knowledge / shoe /
And place one character in each character box. The handwritten character recognition unit 2 performs a character recognition process for each character frame as in (1), and displays the recognition result on the display-integrated tablet 1. The operator checks the displayed recognition result of the six characters, and touches the “OK” key with a pen. In response, the recognition result and the “confirmed” information are passed to the CPU 3.

(5) The CPU 3 takes in the recognition result into the text. At the same time, the CPU 3 operates the kanji / kana conversion dictionary 4 (FIG. 1).
Is used to analyze the character string of the recognition result into words in smaller units. In this case, as a technique for converting kanji to kana, a general technique used in a “document composition system” or a “text-to-speech synthesis system” is used. In this case, the “character recognition device” is divided into three words “character”, “recognition”, and “device”. Each of these words is associated with the corresponding reading and word number by the Kanji-Kana conversion dictionary 4. For example, in order to know the reading of the word "recognition" and the word number, a Kanji-Kana conversion dictionary index shown in FIG. From the Kanji Kana conversion dictionary index, it is found that a word starting with the character “A” is stored in the area starting from the address X of the Kanji Kana conversion dictionary table, and the word number given to the first word is J. Recognize. The kanji kana conversion dictionary table shown in FIG. 2B is referred to based on the obtained start address. In this case, the word "recognition" is stored in the address X. By sequentially examining the Kanji Kana conversion dictionary table from this start address, it is found that the word "recognition" is located two words after the word "recognition". Therefore, it is understood that the word number given to the word “recognition” is J + 2. In addition, since the pronunciation associated with the word “recognition” in the Kanji Kana conversion dictionary table is “Ni”, it is understood that “Ni” should be used as the reading of this character string. The above results are summarized in FIG.

(6) In FIG. 7, it is found that the reading given to the character string "character" is "mo", and the word number in the kanji kana conversion dictionary is L. Similarly, the reading of the word "device" is "so", and the word number is "N".
It is.

(7) Using the analysis result shown in FIG.
The CPU 3 creates a kana / word search table 5 and a kanji / word search table 6. The creation results are shown in FIGS.
It is shown in (c). That is, "character""recognition"
The character string "apparatus" is represented in the kana / word search table as a pair of the reading and the word number as shown in FIG. 8A, and as shown in FIG.
In the word search table, the first character "sentence"
It is represented as a pair of the characters “recognition” and “sou” and the word number of each character string.

(8) Next, "ni / o / ke / ru" is entered one character at a time in each character frame. The handwritten character recognition unit 2 similarly recognizes and displays the input characters one by one. After confirming the displayed recognition result, the user touches “OK” with a pen. The recognition result and the information that the “confirm” key has been pressed are passed to the CPU 3. Since the given recognition result includes only the kana characters, the CPU 3 performs only the import into the text, and does not perform the processing for creating each table.

(9) Next, in order to input a character string "recognition", "ni" is entered in the character box 10a by one character.
The handwritten character recognition unit 2 recognizes the input character “ni” and displays a recognition result. After confirming the displayed recognition result, the operator touches the “shortcut” key with a pen. The handwritten character recognizing unit 2 passes information indicating that the “shortcut” key has been pressed together with the recognition result “ni” to the CPU 3 and enters a stop state. In response to the pressing of the "shortcut" key, the CPU 3 searches the kana / word search table 5 (see FIGS. 1 and 8) to extract all the words indexed by the recognition result "ni". . All of the extracted words are displayed on the display-integrated tablet 1. The display at this time is performed in such a manner that all the words of the search result are displayed in a window 12 opened in the text display screen 9 as shown in FIG.

Extraction of the corresponding word from the kana / word search table 5 is performed as follows. Referring to FIG. 8A, as a word number corresponding to the index “Ni”, M
Is obtained. The address range where the word number M exists can be easily known from the Kanji Kana conversion dictionary index shown in FIG. In this case, the start address X
It is known that there is a word having this word number within a predetermined range thereafter. Therefore, the word “recognition” having the corresponding word number can be obtained by searching after the start address X in the kanji kana conversion dictionary table shown in FIG. 2B.

The operator selects a desired word candidate from the displayed word candidates by touching the pen, and presses the "OK" key.

(10) Next, input "Method / Method /." In the same manner and press the "Enter" key. CPU3 is (5)-
Each table is created in the same procedure as (7).

(11) Next, consider a case where "online" is input again. This character string has already been entered once, and the corresponding katakana table and kana / word search table have been created. Therefore, the operator first enters only "o". The handwritten character recognition unit 2
Recognize "o" and display the recognized result in the corresponding character frame. After confirming the displayed recognition result, the operator “shortens”
Press the key. The recognition result “o” and information indicating that the “shortcut” key has been pressed are passed to the CPU 3. Handwritten character recognition unit 2
Is stopped. The CPU 3 performs the same processing as (9). However, in this case, the index is "O"
Therefore, instead of the kana / word search table, the character string with the number 0 of the katakana table is extracted as shown in FIGS. 8 (a) and 8 (b). The extracted character string is displayed on the display-integrated tablet 1.

(12) Next, consider the case of inputting "recognition". In this case, if the operator already remembers that the word “recognition” has already been entered,
This word can be input as described in (9). However, if you do not realize that you have already typed this word,
Alternatively, there is a case where the user inputs "recognition" because he does not want to disturb his thinking by performing kanji-kana conversion in his head. In this case, in the handwritten character input device according to the present invention, a word already input can be input by inputting "shortened" after inputting the first character in kanji. That is, first, the handwritten character recognition unit 2 recognizes the input word “recognition” and displays the word in the corresponding character frame. After confirming the displayed recognition result, the operator presses the "shortcut" key.
The handwritten character recognition unit 2 passes the recognition result “recognition” and information indicating that the “shortcut” key has been pressed to the CPU 3. CPU3
Performs the following processing in response to the "shortcut" key being pressed. In this case, since the recognition result is a kanji,
The CPU 3 operates the kanji / word search table 6 (FIGS. 1 and 8).
(See (c)), and search and display all the corresponding words. In the example shown in FIG. 8C, the word number M corresponding to the kanji character "recognition" is obtained, and the word "recognition" is extracted from the kanji kana conversion dictionary shown in FIG. The extracted word is displayed on the display-integrated tablet 1.

(13) The input is repeated according to the above procedure, and the sentence mixed with the kanji kana is input by handwriting.

As described above, in the handwritten character input device of this embodiment, a kana / word search table, a kanji / word search table, and a katakana table are automatically created from input words. As the index in this case, the first character in the case where each word is converted into a kana, the first character including the kanji of each word, and the like are used. Therefore, when reentering a word that has already been entered,
The same word can be input by inputting the first character of the word and pressing the "shortcut" key, or by inputting the first character of the kanji and pressing the "shortcut" key. Therefore, the input speed of handwritten characters is significantly improved as compared with the related art. In this case, so-called kana-kanji conversion is not performed, but the input method is a more direct method, and the input operability is improved. In the kanji kana conversion dictionary, not all of the readings of the word are used as the readings assigned to each word, but are limited to, for example, only the first character or two characters. Therefore, the capacity of the kanji-kana conversion dictionary can be saved. When there are a plurality of words obtained as a result of the search, all of the words are displayed in the window, and a desired word can be selected only by touching the pen. Therefore, even when there are a plurality of candidates, a character string can be easily and reliably input.

[0051]

According to the invention described in claim 1 as above, according to the present invention, once the input kanji or kanji Rights kana string, during the next input, the first pre-determined number of flat tentative by enter a <br/> name character generating operations to Jo Tokoro signal input means, it is possible to display and input is converted into the original Kanji or Chinese characters flat kana string. Similarly,
Once entered, the katakana character string will be
Enter the predetermined number of Katakana characters at the beginning
By operating the means to generate a predetermined signal,
Can be converted to katakana character strings for display and input.
You. Chinese characters, or kanji flat kana string or-type
It is not necessary to input all the character strings by hand, and the input efficiency is improved. Further, compared to the case of performing kana-kanji conversion, the input efficiency is good, the conversion operation is small, and the operability is improved.

[0052] According to the invention described in claim 2, kanji or kanji Rights kana character string entered once, by entering the number of hiragana characters predetermined from the beginning of the reading, less input from the next time It can be displayed and entered in numbers. In the dictionary for storing in association with the hiragana character string serving as kanji or kanji Rights kana string and key to its, length hiragana character string is limited to a constant value. Therefore, the efficiency of input can be improved, and the capacity of the dictionary for that purpose can be reduced.

[0053]

[0054] According to the invention described in claim 3, Han past
A word that has been input as a part of a sentence mixed with Japanese kana can be easily input by inputting only the first character. In addition, when inputting kanji, the conversion work of recalling the reading in the mind becomes unnecessary, and the efficiency at the time of input is improved. Furthermore, if you remember that you entered the word in the past when you entered the first few characters, you can immediately enter the entire character string without entering any subsequent characters, Efficiency is improved. Claim
According to the invention described in Item 4, the kanji or kanji once input
The next time you enter a character string
Input a predetermined number of Hiragana characters and operate the input means.
To generate the predetermined signal, the original kanji or
Convert to a character string mixed with Kanji Hiragana and display / input
Can be. Kanji mixed with Kanji or Kanji mixed with Hiragana
Eliminates the need to enter all strings by hand
Efficiency is improved. In addition, when Kana-Kanji conversion is performed,
Efficient input and less conversion required
Operability is improved.

According to the fifth aspect of the present invention , the character string once input is input by inputting only the first few characters of the reading or the first several characters of the character string to thereby obtain the entire character string. Can be entered. Therefore, the efficiency at the time of input is improved. Furthermore, it is possible to string corresponding to the input character these in the presence of two or more displays collectively in the window, and easily identifying the desired word by selecting pen touch. Therefore, the input can be performed reliably and easily.

[Brief description of the drawings]

FIG. 1 is a block diagram of a handwritten character input device according to one embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a configuration of a kanji kana conversion dictionary.

FIG. 3 is a schematic diagram illustrating a display screen of a display-integrated tablet.

FIG. 4 is a schematic diagram illustrating a display screen of a display-integrated tablet.

FIG. 5 is a schematic diagram illustrating an input screen of a display-integrated tablet.

FIG. 6 is a schematic diagram showing a kana / word search table and a katakana table;

FIG. 7 is a diagram illustrating an analysis result of a character string;

FIG. 8 is a schematic diagram showing a configuration of a kana / word search table, a katakana table, and a kanji / word search table.

FIG. 9 is a schematic diagram of a display screen of the display-integrated tablet, showing a window display mode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display integrated tablet 2 Handwritten character recognition part 3 CPU 4 Kanji / Kana conversion dictionary 5 Kana / word search table 6 Kanji / word search table 7 CPU memory 8 Katakana table 9 Body display screen 10a-10f Character frame 11 Function key 12 window

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 1-253079 (JP, A) JP-A 61-292774 (JP, A) JP-A 55-87232 (JP, A) JP-A 57- 166630 (JP, A) JP-A-63-95566 (JP, A) JP-A-62-209667 (JP, A) JP-A-55-59578 (JP, A) JP-A-60-7513 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) G06K 9/62 G06F 17/21

Claims (5)

(57) [Claims] An input means for inputting an on- line handwritten character string and a predetermined signal, a recognition means for recognizing the input character string , a character string in which the recognized character string is mixed with kanji or kanji hiragana
If it converts the recognized kanji or kanji Rights kana string to hiragana character string, the recognized in association with converted the hiragana character number of hiragana characters predetermined from the head of the column If a kanji or kanji hiragana mingled character string storage means for storing a kanji or kanji Rights kana string, is recognized character string is a katakana character string, the
A predetermined number of characters from the beginning of the recognized katakana character string
Associating Takana characters with the recognized katakana character strings
Katakana character string storage means for storing the characters, and the characters input by the input means are hiragana characters
Case, in response to input hiragana characters and Jo Tokoro signal, searches the kanji or kanji hiragana mingled character string storage means, the flat coincides with the inputted hiragana characters provisional <br/> means for retrieving a kanji or kanji Rights kana character string associated with the name characters, characters input by said input means Katakana characters der
The input katakana characters and predetermined signals
In response, searches the katakana character string storage means,
Related to katakana characters that match the entered katakana characters
Means for taking out a katakana character string attached, the retrieved Chinese characters flat kana string or Katakana
An online handwritten character recognition device, comprising: display means for displaying a character string . Wherein said kanji or kanji hiragana mingled character string storage means, stores kanji or kanji Rights kana character string of each particular flat <br/> in association with kana character string, given kanji
Or kanji flat kana string, including a dictionary for converting the corresponding hiragana character string, the maximum value of the length of each hiragana character string of the dictionary, each said Han
Characterized in that it is a constant regardless of the length of the character or graphic Rights kana string, online according to claim 1
Down handwritten character recognition device. 3. A line handwritten Kanji or Chinese characters flat kana string and a predetermined input means for inputting a signal, recognizing means for recognizing the inputted Chinese character or Kanji Rights kana character string by said input means If, by detecting the word boundary of the recognized kanji or kanji Rights kana character string, a character string decomposer for decomposing the recognized kanji or kanji Rights kana string into words, the character string decomposer converting each said word to be output means to a corresponding flat temporary <br/> name string, each said word, associates the number of characters specified in advance from the beginning of the corresponding hiragana character string for storing a word storage means, in response to hiragana character string and Jo Tokoro signal input by said input means, associated with a character that searches the word storage means, matches the input hiragana character string And means for taking out the words, and display means for displaying the retrieved words
Online handwritten character recognition device. 4. An on- line handwritten character string and a predetermined message
Input means for inputting a character, recognition means for recognizing the input character string, and a character string in which the recognized character string is mixed with kanji or kanji hiragana
If, the recognized kanji or kanji hiragana mixed
Converts a character string into a hiragana character string, and converts the converted hiragana
Associates a predetermined number of Hiragana characters from the beginning of the string
The kanji or the kanji hiragana mixed character string
Kanji or Kanji Hiragana character string storage means for storage
And the character input by the input means is a hiragana character
Responds to the input hiragana characters and predetermined signals.
Answer, the kanji or kanji hiragana mixed character string storage
Search for a column, and match the input hiragana characters
Kanji or Kanji Hiragana-mixed sentence associated with the name character
Means for extracting a character string, and displaying the extracted character string mixed with kanji hiragana
Online handwritten character recognition device including: 5. The display means includes window display means for displaying the searched character string or word in a window in association with a predetermined input area on the input means, wherein the input means comprises a window display. The method according to any one of claims 1 to 4, further comprising means for selecting and inputting any of the selected character strings or words with a touch of a pen.
Online handwritten character recognition device.