JPH0765114A - Information processing apparatus and control method - Google Patents

Abstract

(57) [Abstract] [Purpose] To display the recognition result of a handwritten character at an arbitrary position in an information processing device capable of inputting a handwritten character. [Structure] The RAM 13 is provided with a mode area 13a for storing a display position mode. When handwritten characters are input through the pressure-sensitive tablet 14, the CPU 11
Recognizes the handwritten character, displays the recognition result at the display position designated by the outside or the position of the first handwriting of the handwritten character when the display position mode is set in the mode area 13a, and the display position mode is displayed. If is not set, the recognition result is displayed at the cursor position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus used as a portable personal information device, and more particularly to an information processing apparatus and a control method capable of inputting handwritten characters.

[0002]

2. Description of the Related Art Conventionally, in a pen-input type information processing device,
Some allow handwritten characters to be entered. This is to input characters by handwriting by writing on a tablet with a pen. This handwritten character is recognized, and the recognition result (font data) is displayed on the screen.

In this type of information processing apparatus, there are a method of inputting handwritten characters in a specific recognition frame and a method of inputting them in an arbitrary area. The former is a method for inputting handwritten characters for each character in a predetermined recognition frame, and the latter is a method for continuously inputting handwritten characters in an arbitrary area without requiring such a recognition frame.

Comparing these two methods, the latter has the drawback that it takes longer to recognize characters, but has the advantage of giving the feeling of "writing a character on paper". However,
Even if a handwritten character is input in an arbitrary area, the position displayed after the character is recognized is always the position of the cursor.

Some information processing apparatuses of this type handle handwritten characters as image data when they cannot be recognized and display the image data. By displaying such image data, unrecognized handwritten characters can be grasped and can be used as a reference when inputting again. However, since the recognition level of the system is always constant, if the handwritten character is not correctly recognized, it is necessary to correct the font and re-input.

Further, some information processing apparatuses of this type can return the recognition result to image data.
This is realized by storing the image data corresponding to the recognition result. In this case, the stored image data cannot be erased freely. Therefore, when inputting a plurality of handwritten characters over many screens, a large capacity memory is required.

[0007]

As described above, in the conventional information processing apparatus capable of inputting handwritten characters, it is possible to input handwritten characters in any area, but the display position is free. Could not be set to.

Further, conventionally, the recognition level has always been constant. That is, all handwritten characters were recognized at the preset recognition level. For this reason, some characters cannot be recognized at the recognition level, and such a character has no choice but to be entered by the user while paying attention to the correct font.

In addition, when the recognition result is returned to the image data, the image data could not be erased freely in the past, so a large capacity memory was required.

The present invention has been made in view of the above points, and in an information processing apparatus capable of inputting handwritten characters, a display position of a recognition result can be arbitrarily set and a recognition level can be arbitrarily set. It is another object of the present invention to provide an information processing device and a control method capable of displaying image data of handwritten characters without requiring a large capacity memory.

[0011]

The present invention has a display position mode for displaying a recognition result of handwritten character information input by handwriting at an arbitrary position, and when the handwritten character information is character-recognized, When the display position mode is set, the recognition result is displayed at the display position designated by the outside or the position of the first stroke of the handwritten character information, and the display position mode is not set. Has
The recognition result is displayed at the position of the cursor.

Further, according to the present invention, a plurality of words for character recognition of handwritten character information input by handwriting and recognition information set for each word are stored in a recognition dictionary, and each of the above-mentioned recognition dictionary is stored. The recognition level set for each word is stored in the storage means, and when the handwritten character information is input, the recognition information corresponding to the recognition level stored in the storage means is recognized for each word. The handwritten character information is read out from a dictionary, the handwritten character information is recognized, and the recognition level of the word stored in the storage means is changed according to the recognition result.

According to the present invention, the image data of the handwritten character information input by handwriting is stored in the storage means.
In displaying the image data instead of the character recognition result, a unit for erasing the image data stored in the storage means is set, and the image data is erased for each set unit. It was done.

[0014]

According to the above configuration, by setting the display position mode, the recognition result of the handwritten character information can be displayed at any position different from the cursor position, that is, the display position designated by the outside or the handwritten character information of the first position. It can be displayed at the position of the first stroke.

Further, a recognition level can be set for each word in the recognition dictionary, character recognition can be performed at that recognition level, and the recognition level of the word can be changed (learned) according to the recognition result. it can.

Since the unit for erasing the image data of the handwritten character information can be set, the memory capacity can be suppressed by erasing the image data for one screen at the timing when the screen is switched. it can.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a main part of a pen-input type information processing apparatus capable of inputting handwritten characters. In FIG. 1, a CPU 11 controls the entire apparatus. Here, the ROM 12 and the RAM 13 are accessed and a program according to an input instruction is activated to execute a handwriting character recognition control process or the like.

The ROM 12 has a program area 12a for storing a program necessary for starting the CPU 11.
In addition to a font area 12b for storing font data used for display, a dictionary area 12c for storing a handwritten character recognition dictionary is provided here. The recognition dictionary stores a plurality of words for recognizing handwritten characters and recognition information set for each word.
In this case, the recognition information is composed of a plurality of pieces of information such as the stroke order and the number of strokes.

The RAM 13 has a mode area 13a for storing a display position mode, a dictionary area 13b for storing a learning dictionary of handwritten characters, a recognition candidate buffer 13c for storing recognition candidates, and handwritten character image data. An image area 13d for storing the image data is provided. The display position mode is a mode for displaying the character recognition result at an arbitrary position, and is arbitrarily set by the user. The learning dictionary stores the recognition level set for each word in the recognition dictionary. In this case, the recognition level indicates the degree of use of the recognition information in the recognition dictionary.
That is, for example, the recognition level for a certain word is "3".
In that case, three pieces of information such as the stroke order, the number of strokes, and the stroke are used for character recognition as the recognition information of the word.

The pressure-sensitive tablet 14 and the tablet controller 15 are elements that constitute a data input device. The pressure-sensitive tablet 14 is normally a touch panel tablet, and uses a pen for input operation. The tablet control unit 15 generates coordinate data corresponding to the input position detected by the pressure-sensitive tablet 14, and the CPU
Enter in 11.

The LCD (liquid crystal display) 16 and the LCD control unit 17 are components that constitute a data output device. L
The CD 16 has a structure integrated with the pressure sensitive tablet 14, and is arranged so that the panel of the pressure sensitive tablet 14 and the display screen face each other. Here, the data input / output device 18 is configured by combining the pressure-sensitive tablet 14 and the LCD 16. LCD control unit 17
The display operation of the LCD 16 is controlled based on the control of U11. Data to be displayed on the LCD 16 under the control of the LCD control unit 17 is stored in the VRAM 19.

Next, the operation of the embodiment will be described. Here, (a) a character recognition result display operation according to the display position mode, (b) a recognition level changing operation, and (c) a display switching operation between the recognition result and image data will be described separately.

(A) Display operation of character recognition result in accordance with display position mode This apparatus has the pressure sensitive tablet 14 arranged on the display screen of the LCD 16 to form an integrated data input / output apparatus 18. Therefore, the entire screen can be used as the input area. The handwritten character is input by writing with a pen on the pressure-sensitive tablet 14. The pen used at this time is for pressing the tablet 14 and is not electrical.

In the method of inputting a handwritten character in an arbitrary area, there is no recognition frame defined to input the character by character. Therefore, it is necessary to judge up to which one character is to be cut out. As one of the methods, there is a method of monitoring the time interval of pressing (tablet touch). This is because when the next press is not detected even after the lapse of a predetermined time,
This is a method of processing assuming that the writing operation for one character is completed. However, the present invention is not limited to that method.

As shown in the flow chart of FIG. 2, when a handwritten character is input through the pressure sensitive tablet 14 (step A1), the CPU 11 causes the dictionary area 12 of the ROM 12 to operate.
Character recognition processing is performed with reference to the recognition dictionary stored in c (step A2).

Here, the CPU 11 checks whether or not the display position mode is set in the mode area 13a of the RAM 13 (step A3). This display position mode is a mode for displaying the character recognition result at an arbitrary position, and is designated by pen-clicking a mode switch (not shown) displayed on the display screen of the LCD 16 through the pressure-sensitive tablet 14, for example.

When the display position mode is not set (No in step A3), the CPU 11 sets the current cursor position as the display position (step A4) and displays the character recognition result there (step A6). Figure 4
Shown in. As shown in FIG. 4A, for example, when the character "gu" is input by handwriting, the recognition result of the handwritten character is displayed at the position where the cursor 21 was displayed, as shown in FIG. 4B. . In this case, the handwritten character may be written in any area on the screen. The recognition result is displayed in the size of the cursor 21.

When the display position mode is set (Yes in step A3), the CPU 11 sets the pointing position as the display position (step A5) and displays the character recognition result (step A6). This state is shown in FIG. As shown in FIG. 5A, an arbitrary position 22 on the screen
After pointing, the character "frame" is input by handwriting, and the recognition result of the handwritten character is displayed at the pointing position 22, as shown in FIG. In this case, the handwritten character may be written in any area on the screen. The recognition result is displayed in the size of the cursor 21 or the size corresponding to the handwritten character.

As described above, by setting the display position mode, the recognition result can be displayed at an arbitrary position different from the cursor position. Therefore, in a device that does not require a recognition frame, it is possible to input handwritten characters in an arbitrary area and freely set the display position.

FIG. 3 is a flow chart showing the operation of another embodiment. Here, the display position is the position of the first handwriting of the handwritten character. That is, as shown in the flowchart of FIG. 3, when the CPU 11 recognizes a handwritten character (steps B1 and B2), if the display position mode is not set (N in step B3).
o), similarly to the above, the cursor position is set as the display position (step B4), and the recognition result is displayed there (step B).
6). On the other hand, when the display position mode is set (No in step B3), the CPU 11 sets the first handwriting of the handwritten character as the display position (step B5), and displays the recognition result there (step B6).

This state is shown in FIG. As shown in FIG. 6A, if the character “frame” is input by handwriting with the arbitrary position 23 on the screen as the first stroke, FIG.
As shown in, the recognition result of the handwritten character is displayed at the position 23 of the first stroke. In this case, the handwritten character may be written in any area on the screen. The recognition result is displayed in the size of the cursor 21 or the size corresponding to the handwritten character.

In this way, the recognition result is displayed at the position of the first handwriting character. Therefore, it is not necessary to specify the display position, and the position where the character is directly written becomes the display position, so that a feeling of "writing a character on paper" can be obtained.

(B) Recognition Level Changing Operation The ROM 12 is provided with a dictionary area 12c for storing a dictionary for handwritten character recognition. Also, RAM1
3 is provided with a dictionary area 13b for storing a learning dictionary. The recognition dictionary stores a plurality of words and recognition information set for each of the words. Further, the learning dictionary stores the recognition level set for each word in the recognition dictionary. The handwritten character is recognized by comparing each word in the recognition dictionary with the handwritten character and searching for a word whose recognition information according to the recognition level matches the handwritten character.

More specifically, for example, as shown in FIG. 8A, it is assumed that the recognition level of the word "eye" stored in the recognition dictionary is "3". When comparing this word "eye" and handwritten characters, for example, the stroke order from among various recognition information preset in the word "eye",
When three pieces of information such as stroke number and stroke are used, and when these three pieces of information (stroke order, stroke number, stroke) match information (in this case, stroke order, stroke number, stroke) that the handwritten character has, the word at this time is the recognition result. Will be output. The present invention is characterized by changing the recognition level for each word in the recognition dictionary and learning the changed recognition level.

As shown in the flow chart of FIG.
As a default, U11 sets a word search counter n (not shown) to "0", and the recognition candidate buffer 13
With c cleared (step C1), the recognition information and the recognition level of each word stored in the recognition dictionary are set to 1
Words are read word by word, and it is checked whether or not there is a word whose recognition information matches the number of read recognition levels (steps C2 to C4). If there is a corresponding word (Yes in step C4)
s), the CPU 11 stores the word in the recognition candidate buffer 13c provided in the RAM 13 (step C).
5) The word search counter n is updated to search for the next word (step C6).

When all the words in the recognition dictionary are searched in this way (Yes in step C2), the CPU 11 displays the words currently stored in the recognition candidate buffer 13c on the LCD 16 as recognition candidates (step C7). .

If there is a correct word as a recognition result in the displayed recognition candidates and the user selects the word (Yes in step C8), the CPU 11 determines the word as a recognition result at a predetermined display position (for example, the display position). It is displayed at the cursor position) (step C9), and the recognition level in the learning dictionary is changed according to the current recognition level of the word (step C10). In this case, since the recognition level is not changed, the current value is stored in the learning dictionary as it is.

On the other hand, if there is no correct word as a recognition result in the displayed recognition candidates, or if there are correct words but the number of recognition candidates is further reduced, the user gives an instruction to change the recognition level. (Step C11). C
The PU 11 changes the current recognition level according to the change instruction (step C12 or C13), and repeats the same processing as above with the changed recognition level (step C1).
4).

In this way, if a certain word is selected as a result of searching each word in the recognition dictionary with the changed recognition level, the CPU 11 displays the word as the recognition result as described above (step C9). , The recognition level in the learning dictionary is changed according to the current recognition level of the word (step C10). In this case, since the recognition level is changed, the changed value is stored in the learning dictionary.

More specifically, for example, as shown in FIG. 8A, "eye", "day", "shellfish", "shellfish" in the recognition dictionary,
It is assumed that the recognition level of each word such as "gu" is set to "3". When the recognition level “3” remains and the word “gu” is obtained as the recognition result,
As the recognition level of the word, “3” is maintained as it is. On the other hand, as shown in (b) of the same figure, the recognition level is lowered by one and the character recognition is performed at the recognition level "2".
When the word "gu" is obtained as the recognition result, "2" is stored as the recognition level of the word. After that,
Character recognition is performed at the recognition level "2" for the word "gu".

As described above, character recognition can be performed by arbitrarily setting the recognition level. Therefore, if the input handwritten character is not correctly recognized, the desired recognition result can be obtained by only lowering the recognition level without re-inputting the handwritten character. On the contrary, when many recognition candidates are displayed, the candidates can be narrowed down by increasing the recognition level.

When changing the recognition level, it is necessary to let the user recognize what level and how much recognition result is obtained. Therefore, a level adjustment screen as shown in FIG. 9 is displayed as a guide. You may. That is, first, as shown in FIG. 9A, the user is made to input a predetermined word by handwriting. Next, as shown in FIG. 9B, the user is allowed to specify the recognition level, and an example of the recognition result at the specified recognition level is displayed. This allows
The user can grasp what level of recognition is appropriate for his handwritten character.

(C) Display switching operation between recognition result and image data The RAM 13 is provided with an image area 13d for storing image data of handwritten characters. This is for storing the image data at that time when the recognition result is displayed and returning the recognition result to the image data at any time.

By the way, when a recognition result which is not generally expected is displayed, re-input is performed immediately. That is, for example, when handwriting input of the mathematical expression "∫",
If it is recognized as "S", it should not be left as it is, and immediately display the image data,
After checking the state of handwritten characters at that time, it is common to correct the font and re-enter. Considering in this way, the image data need not be stored forever. In particular, in the case of inputting a plurality of handwritten characters over many screens, if the image data is always stored, a large capacity memory is required. Therefore, the present invention is
It is characterized in that the image data is arbitrarily erased to suppress the memory capacity.

As shown in the flowchart of FIG. 10, when a handwritten character is input (step D1), the CPU 11 stores the image data of the handwritten character in the image area 13d of the RAM 13 (step D2). Also, CP
U11 recognizes the handwritten character (step D3) and displays the recognition result on the LCD 16 (step D).
4).

Here, when the screen is switched to the next screen (Yes in step D5), the CPU 11 determines that the image data stored so far is not necessary, and the image data for one screen currently stored in the image area 13d is displayed. All are erased (step D6). On the other hand, in the same screen,
If there is an instruction to display image data (Y in step D7)
es), the CPU 11 replaces the image data currently stored in the image area 13d with the LCD 1 instead of the recognition result.
No. 6 is displayed (step D8).

This state is shown in FIG. For example, in FIG.
As shown in (a), in the state where the recognition result is displayed in the same screen, the image data of the handwritten character corresponding to the recognition result is stored in the image area 13d. The image data as shown in FIG. Here, when moving to the next screen, all the image data currently stored is erased, and new image data is again displayed in the image area 13
It is stored in d.

In this way, the image data is erased for each screen. Therefore, even when a plurality of handwritten characters are input over many screens, the display switching between the recognition result and the image data can be realized without requiring a large capacity memory.

In the above embodiment, the image data is erased on a screen-by-screen basis, but it may be erased on a line-by-line or character-by-character basis. It is possible.

[0050]

According to the above configuration, the recognition result is displayed at an arbitrary position different from the cursor position according to the setting of the display position mode. It is possible to input handwritten characters in the area and set the display position freely, and it is possible to use it as if "writing characters on paper".

Further, since the recognition level is arbitrarily set for each word to perform character recognition, when the handwritten character is not correctly recognized, the recognition level can be changed without re-inputting the handwritten character. You can redo the character recognition just by doing. In this case, since the changed recognition level is learned, there is no need to reset the recognition level for the same word.

Further, in the case of storing the image data corresponding to the character recognition result and displaying the image data in place of the character recognition result, since the image data is erased for each screen, for example, a plurality of handwritten characters are written. Even when inputting over many screens, display switching between the recognition result and the image data can be realized without requiring a large capacity memory.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an information processing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a display operation of a character recognition result according to a display position mode of the present invention.

FIG. 3 is a flowchart showing another display operation in the display position mode.

FIG. 4 is a diagram showing a display screen when the display position mode is not set.

FIG. 5 is a diagram showing a display screen when the display position mode is set.

FIG. 6 is a diagram showing another display screen when the display position mode is set.

FIG. 7 is a flowchart for explaining a recognition level changing operation of the present invention.

FIG. 8 is a diagram for explaining a method for recognizing a handwritten character according to the recognition level.

FIG. 9 is a diagram showing a level adjustment screen displayed when the recognition level is changed.

FIG. 10 is a flowchart for explaining a display switching operation between a recognition result and image data according to the present invention.

FIG. 11 is a diagram showing a display switching screen between the recognition result and image data.

[Explanation of symbols]

11 ... CPU, 12 ... ROM, 12c ... Dictionary area, 13
... RAM, 13a ... mode area, 13b ... dictionary area, 1
3c ... Recognition candidate buffer, 13d ... Image area, 14
… Pressure-sensitive tablet, 15… Tablet controller, 16…
LCD, 17 ... LCD control unit, 18 ... Data input / output device, 19 ... VRAM, 21 ... Cursors 21, 22 ... Pointing position, 23 ... First stroke position.

Claims (9)

[Claims] 1. Input means for inputting handwritten character information, character recognition means for recognizing the handwritten character information input by the input means, and designating means for designating a display position of a recognition result of the character recognition means. An information processing apparatus comprising: a control unit configured to display the recognition result at the display position designated by the designation unit. 2. Input means for inputting handwritten character information, character recognition means for recognizing the handwritten character information input by the input means, and detection for detecting the position of the first handwriting of the handwritten character information. An information processing apparatus comprising: a means and a control means for displaying a recognition result of the character recognition means at the position of the first writing stroke detected by the detection means. 3. Input means for inputting handwritten character information, character recognition means for recognizing the handwritten character information input by this input means, and for displaying the recognition result of this character recognition means at an arbitrary position. When the display position mode is set by the mode setting means for setting the display position mode of, the display position designated by the outside or the position of the first stroke of the handwritten character information is set. Information comprising a control means for displaying the recognition result of the character recognition means, and for displaying the recognition result of the character recognition means at the position of the cursor when the display position mode is not set. Processing equipment. 4. A display position mode for displaying a recognition result of handwritten character information input by handwriting at an arbitrary position, and when the handwritten character information is character-recognized, the display position mode is set. If it is, the recognition result is displayed at the display position designated by the outside or the position of the first writing of the handwritten character information. If the display position mode is not set, the recognition result is displayed at the cursor position. A control method characterized in that a recognition result is displayed. 5. Input means for inputting handwritten character information, setting means for setting a recognition level for recognizing the handwritten character information input by the input means, and the recognition set by the setting means. An information processing apparatus comprising: a character recognition unit that recognizes the handwritten character information at a level. 6. An input means for inputting handwritten character information, a recognition for storing a plurality of words for character recognition of the handwritten character information input by the input means, and recognition information set for each word. A dictionary, storage means for storing the recognition level set for each word of the recognition dictionary, and the recognition information corresponding to the recognition level stored in the storage means for each word from the recognition dictionary. Read
Characteristic recognition means for character recognition of the handwritten character information, and level change means for changing the recognition level of the word stored in the storage means according to the recognition result of the character recognition means are provided. Information processing device. 7. A plurality of words for character recognition of handwritten character information input by handwriting and recognition information set for each of the words are stored in a recognition dictionary, and set for each of the words in the recognition dictionary. The recognized recognition level is stored in the storage means, and when the handwritten character information is input, the recognition information corresponding to the recognition level stored in the storage means is read from the recognition dictionary for each word. A control method characterized in that the handwritten character information is character-recognized, and the recognition level of the word stored in the storage means is changed according to the recognition result. 8. Input means for inputting handwritten character information, character recognition means for recognizing the handwritten character information input by the input means, and handwritten character information corresponding to a recognition result of the character recognition means. Storage means for storing image data, display means for displaying the image data stored in the storage means instead of the recognition result, and erasing the image data stored in the storage means for each predetermined unit. An information processing apparatus comprising: a control unit. 9. A control method for an information processing apparatus, wherein image data of handwritten character information input by handwriting is stored in a storage means, and the image data is displayed instead of the character recognition result. A control method is characterized in that a unit for erasing the image data stored in is set, and the image data is erased for each set unit.