JP2013025370A - Handwriting input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handwriting input device which enables smooth and high-speed input and has a large handwriting input area even when it is small-sized.SOLUTION: A handwriting input device (portable information terminal) 1 comprises: a display section 11a having a touch panel 11b; and a display control section 13a for displaying handwritten and inputted strokes at the display section 11a and displaying characters for which the strokes are character-recognized. The display control section 13a displays the strokes of handwriting input to the display section 11a, erases the display of the strokes every time input of one character is detected, successively displays reduced strokes for which the strokes are reduced at the display section 11a, and displays a character-recognized character string instead of the display of the reduced strokes every time the character string by the handwriting input is inputted.

Description

  The present invention relates to a handwriting input device capable of inputting characters at high speed using an input means using handwritten characters.

  In recent years, a terminal having a touch panel called a smartphone or a tablet terminal has been increasing, and a user operation is performed on the terminal by a user directly touching a screen. Recently, in addition to the conventional hard keyboard and software keyboard, there are terminals that adopt means for inputting characters by recognizing characters written on the screen by handwriting as characters in addition to conventional hard keyboards and software keyboards. Increasingly, various types have been proposed.

  Patent Document 1 displays a plurality of character input frames in which characters can be input by handwriting, displays a handwriting input in the character input frame at the writing position, and inputs handwritten characters in the character input frame. When it is detected that the character is completed, the stroke in the character input frame is deleted from the screen, and the stroke information storage unit stores the stroke information of the handwritten character stored for each character input frame. And a terminal that displays recognized characters in a predetermined display area is disclosed. In this terminal, because of the above-described configuration, characters can be input one after another into the input frame regardless of the character recognition speed, so that high-speed input is possible.

JP 2000-293631 A

  However, in the thing disclosed in Patent Document 1, when the user is inputting a character string, the recognition result is displayed in the middle of the character string. Therefore, there is a possibility that an incorrect recognition result is displayed in the middle of inputting the character string. In addition, as a result of displaying misrecognition, the user's input operation is hindered, for example, he / she wants to correct the displayed error rather than the subsequent input.

  In view of the above situation, the present invention provides a handwriting input device capable of performing high-speed input smoothly by handwriting.

  The first technical means of the present invention includes a display unit having a touch panel, and a display control unit that displays a stroke that is handwritten and input to the display unit, and displays a character whose stroke is recognized. The display control unit displays a stroke of handwritten input to the display unit, erases the display of the stroke each time an input of one character is detected, and sequentially displays a reduced stroke obtained by reducing the stroke on the display unit, Each time a character string is input by handwriting input, a character string recognized as a character is displayed instead of displaying the reduced stroke.

According to a second technical means of the present invention, in the first technical means, when the character recognized by the display controller is touched, the display unit displays the corresponding reduced stroke instead of the character. And displaying other character recognition candidates on the display unit, and then displaying the character recognition candidates instead of the reduced stroke when the other character recognition candidates are touched. It is.

  According to a third technical means of the present invention, in the first technical means, when the character recognized by the display control unit is touched, the display unit displays the corresponding reduced stroke instead of the character. When the character is displayed and further handwritten to the display unit again, the character recognized from the stroke of the handwritten input is displayed instead of the reduced stroke.

  According to a fourth technical means of the present invention, in the first technical means, when the character recognized by the display control unit is touched, the display unit displays the corresponding reduced stroke instead of the character. And when the other character-recognized character is touched, the original character-recognized character is displayed on the display unit instead of the reduction stroke, and the touched another character is displayed. Instead, the corresponding reduced stroke is displayed on the display unit.

  According to a fifth technical means of the present invention, in the first technical means, when the stroke storage area becomes a predetermined value or less while the input of the character string by the handwriting input is continued, the stroke is stored in the storage area. For the stroke information of the oldest character, the character recognized from the stroke information is determined as an input character and erased from the storage area.

  According to the present invention, it is possible to provide a handwriting input device that is capable of high-speed input, has a large handwriting input area even in a small size, and is suitable for long sentence input.

It is a block diagram explaining the structural example of the handwriting input device of this invention. It is a figure which shows an example of the display screen of the handwriting input device of FIG. It is a figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is another figure explaining the operation example with respect to the display screen of FIG. 2, and the operation example of the handwriting input device at that time. It is a flowchart explaining an example of the process in the handwriting input device of FIG. 1 from a user's handwriting input start until the character string by which the character recognition was performed was displayed on the input character display area. It is a flowchart explaining an example of the process in the handwriting input device of FIG. 1 when displaying after the character string by which the character recognition was carried out, and being corrected by the user.

  Hereinafter, the handwriting input device of the present invention will be described with reference to the drawings, using an example applied to a small portable information terminal such as a mobile phone. FIG. 1 is a block diagram illustrating a configuration example of a handwriting input device of the present invention. FIG. 2 is a diagram illustrating an example of a display screen of the handwriting input device of FIG. 3 to 15 are diagrams for explaining an operation example on the display screen of FIG. 2 and an operation example of the handwriting input device at that time.

  A portable information terminal 1 in FIG. 1 includes an operation unit 11 that receives an operation input by a user, a data memory 12 for storing a program, a control unit 13 that executes the program, and a work memory that stores data at the time of execution. 14 or the like.

  The operation unit 11 includes a display unit 11a having a touch panel 11b that receives an operation input from a user, and an input button 11c configured by a group of input buttons such as various power buttons and input determination buttons.

The control unit 13 includes a display control unit 13a that controls a screen displayed on the display unit 11a.
The screen displayed by the display control unit 13a includes, for example, a handwriting input area (hereinafter referred to as an editor area) for a user to draw a stroke by hand using a finger, a stylus pen, or the like, as shown in a screen 100 of FIG. One display 101 is provided, and the display control unit 13 displays a stroke handwritten to the input area 101 by the user at the drawing position. The drawn stroke information is stored in the work memory 14.

  Further, the screen 100 is provided with an input character display area 102 for displaying a later-described reduced stroke of a stroke input to the editor area 101 or a character recognized from the stroke, and the cursor includes a cursor. 102a is provided. Further, the screen 100 is provided with a function key display area 103 for displaying various keys such as a direction key 103a for moving the cursor 102a and a line feed / decision key 103b.

  In the portable information terminal 1, when the handwriting input to the editor area 101 is started, it is detected whether or not the input for one character in the area 101 is completed. Whether or not the input of one character has been completed is determined, for example, when the user has finished drawing the stroke H1 in the editor area 101 as shown in FIG. 3, that is, the most recent operation on the editor area 101 has been completed. It is determined by whether or not the first predetermined time has passed without any operation on the editor area 101.

  Further, in the portable information terminal 1, the handwriting input completion detection unit 13c detects whether or not the input of the character string by the handwriting input to the editor area 101 is completed. Whether or not the input of the character string has been completed is, for example, that a second predetermined time has elapsed since no operation was performed on the editor area 101 since the completion of the input of one character in the editor area 101 was detected. Whether or not.

The portable information terminal 1 operates as follows when the completion of input of one character in the editor area 101 is detected while the completion of input of the handwritten character string in the editor area 101 is not detected.
That is, when it is detected that the input of the first character has been completed, the stroke information of the stroke H1 for one character being displayed in the editor input area 101 is stored in the work memory 14, and the display controller 13 The stroke H1 displayed in the editor area 101 is deleted as shown in FIG. 4, and a reduced stroke G1 obtained by reducing the stroke H1 in the input character display area 102 based on the stroke information for one character stored in the work memory 14. Is displayed. The cursor 102a is also moved and displayed. The same is repeated for the second and subsequent characters, and each time the completion of input for one character in the editor area 101 is detected, as shown in FIG. G5 is sequentially displayed in the input character display area 102.

  When the mobile terminal device 1 detects the completion of the input of the character string in the editor area 101, the character string (characters) recognized based on the stroke information as shown in FIG. 6 instead of the reduced strokes G1 to G5. C1 to C5) are displayed in the input character display area 102. The character recognition is not performed after completion of handwriting input is detected, but is performed when stroke information for one character is stored.

  When the characters C1 to C5 are intended by the user, the line break / decision key 103b is operated by the user, so that the characters C1 to C5 being displayed in the input character display area 102 are confirmed as input characters, and display control is performed. The unit 13 displays the confirmed character at the top of the editor area 101.

  As described above, the portable terminal device 1 displays a reduced stroke once during handwriting input, and displays a recognized character when it is determined that the user has completed the input of a set amount of character strings. Accordingly, an erroneous recognition result is not displayed and the input operation is not hindered, and the user can smoothly input by handwriting. Further, since characters can be input by handwriting in the editor area 101 one after another regardless of the speed of character recognition, high-speed input is possible.

Subsequently, an operation performed by the user and the operation of the mobile terminal device 1 at that time when the recognized characters C1 to C5 are not intended by the user will be described.
If any of the characters C1 to C5 is not intended by the user, the character to be corrected (C3 in the example in the figure) is designated by the user as shown in FIG. Instead of the designated character C3, the reduced stroke G3 corresponding to the character C3 is displayed again in the input character display area 102, as shown in FIG.

  At that time, the display control unit 13 displays other character recognition candidates A1 to A3 instead of the character C3 in the alternative candidate display area 104. On the other hand, the user operates the character recognition candidate (A1 in the example of the figure) of the character intended by the user among the character recognition candidates A1 to A3 as shown in FIG. The candidate display area 104 is deleted, and the character recognition candidate A1 is displayed as a character C6 instead of the reduced stroke C3 as shown in FIG.

  On the other hand, as shown in FIG. 11, the display control unit 13 displays the alternative candidate display area 104 or the reduced stroke G3 corresponding to the touched recognized character, and the handwriting input to the editor area 101 is performed. Is started and stroke information of the stroke H2 for one character being displayed in the editor input area 101 is stored in the work memory 14, and further, the display control unit 13 causes the editor area 101 of the screen to be displayed. In addition, the stroke H2 displayed in (2) is deleted, and the character whose stroke H2 is recognized is displayed in the input character display area 102 instead of the reduced stroke G3.

When the user wants to change the correction target, as shown in FIG. 12, since the correction target character (C4 in the example in the figure) different from the correction target specified last time is specified, the display control unit 13 is specified. As shown in FIG. 13, the reduced stroke G4 corresponding to the character C4 is displayed again in the input character display area 102, and the character corresponding to the reduced stroke G3 is used instead of the reduced stroke G3. Redisplaying the recognized character C3 in the input character display area 102 At that time, the display control unit 13 displays the character recognition candidates A1 to A3 in place of the character C4 (see FIG. 12) in the alternative candidate display area 104.

Also, in the portable information terminal 1, when the input of one character in the editor area 101 is detected, if the number of reduced strokes displayed in the input character display area is already the maximum displayable number, The oldest one is deleted, and a reduced stroke of the stroke newly deleted from the editor area 101 is displayed. At this time, the stroke information related to the erased reduced stroke is stored in the work memory 14 without being erased.
However, when the area for storing the stroke information of the character does not remain in the work memory 14 while the input of the character string by handwriting input is continued, that is, when the area is less than the predetermined value, the stroke information stored in the memory 14 Of the oldest, the character recognized from the stroke information is confirmed as the input character, erased from the memory 14, and the display control unit 13 displays the confirmed character N at the top of the editor area 101. .

FIG. 15 is a flowchart for explaining an example of processing in the handwriting input device 1 in FIG. 1 from when the user's handwriting input is started until a character string whose character has been recognized is displayed in the input character display area.
As shown in the figure, when the handwriting input is started, the display control unit 13b displays the stroke to the editor area 101 at the drawing position (step S1), and whether or not the input for one character in the editor area 101 is completed. The timer T1 for determining is started (step S2). Thereafter, it is determined whether or not there is a handwritten input from the user (step S3). When there is an input (in the case of YES), the timer T1 is stopped (step S4), and there is no input (in the case of NO). Determines whether the timer T1 has expired (step S5). If the timer T1 has not expired (in the case of NO), the process returns to step S3. If it has expired (in the case of YES), the display control unit 13b erases the stroke in the editor area 101 (step S6). ).

  Then, it is determined whether or not the storage area for the stroke information of characters remaining in the work memory 14 is equal to or less than a predetermined value (step S7). If it is equal to or less than the predetermined value (in the case of YES), the oldest stroke information stored in the memory 14, that is, the character information recognized from the information for the stroke information of the first character is displayed. The input character is confirmed, and the confirmed character is displayed on the upper part of the editor area 101 by the display control unit 13b (step S8), and the process proceeds to step S9. In step S7, if it is currently equal to or smaller than the predetermined value (in the case of NO), the process proceeds to step S9 as it is.

  In step S9, the reduced stroke of the stroke deleted in step S6 is displayed on the input character display area 102 by the display control unit 13b (step S9), and it is determined whether or not the handwriting input to the editor area 101 is completed. Timer T2 is started (step S10). In step S9, when the number of reduction strokes displayed in the input character display area is already the maximum displayable number, the oldest reduction stroke is displayed and deleted from the editor area 101. Displays the reduced stroke of the stroke that was made.

  Thereafter, it is determined whether or not there is a handwritten input from the user (step S11). If there is an input (in the case of YES), the timer T2 is stopped (step S12), the process returns to step S1, and there is no input. In the case of (NO), it is determined whether or not the timer T2 has expired (step S13). If the timer T2 has not expired (NO), the process returns to step S11. If the timer T2 has expired, the display control unit 13b erases the reduced stroke sequence in the input character display area 102 (step S14). The character recognition candidates are displayed based on the stroke information stored in the work memory 14 (step S15).

FIG. 16 is a flowchart for explaining an example of processing in the handwriting input device 1 in FIG. 1 when the character string recognized by the character is displayed and then corrected by the user.
As shown in the figure, when a character recognized as a correction target is designated by the user, the display control unit 13 erases the designated character recognized character (step S21), and corresponds to the character instead. The reduced stroke is displayed again in the input character display area 102 (step S22), and an alternative candidate display area 104 for displaying another character recognition candidate in place of the erased character is displayed (step S23).

  Then, it is determined whether or not a character recognition candidate has been selected (step S24). If it has been selected, the reduced stroke that has been redisplayed is deleted (step S25), and the selected character recognition candidate is used as an input character. Confirmed and displayed in the input character display area 102 (step S26).

  In step S24, if no character recognition candidate is selected (in the case of NO), it is determined whether or not there is a handwritten input from the user (step S27), and if there is an input (in the case of YES). The display control unit 13b displays the stroke to the editor area 101 at the drawing position (step S28), and starts the timer T1 (step S29). Thereafter, it is determined whether or not there is a handwritten input from the user (step S30). If there is an input (in the case of YES), the timer T1 is stopped (step S31), the process returns to step S28, and there is no input. In the case of (NO), it is determined whether or not the timer T1 has expired (step S32). If the timer T1 has not expired (in the case of NO), the process returns to step S30. If it has expired (in the case of YES), the display control unit 13b deletes the stroke in the editor area 101 (step S33). ). In addition, the display control unit 13b deletes the redisplayed reduced stroke in the input character display area 102 (step S34). Instead, a new handwritten input is made based on the stroke information stored in the work memory 14. Characters recognized from the stroke are displayed (step S35).

  Furthermore, in step S27, when there is no handwriting input from the user (in the case of NO), it is determined whether or not the user has changed the correction target, that is, whether or not another character currently displayed is designated (step S27). S36). If not specified (in the case of NO), the process returns to step S24, and if specified (in the case of YES), the display control unit 13b erases the reduced stroke that has been displayed again, and changes to the reduced stroke. The corresponding character recognized character is displayed again in the input character area 102 (step S37). Then, the display control unit 13b deletes another character designated as the correction target, redisplays the reduced stroke corresponding to the character in the input character display area 102 (step S38), and returns to step S21.

DESCRIPTION OF SYMBOLS 1 ... Handwriting input device (personal digital assistant), 11 ... Operation part, 11a ... Display part, 11b ... Touch panel, 13 ... Control part, 13a ... Display control part.

Claims (5)

A display unit having a touch panel; and a display control unit that displays strokes input by handwriting on the display unit and displays characters whose characters are recognized by the strokes.
The display control unit
Displaying a stroke of handwritten input to the display unit, erasing the display of the stroke every time an input of one character is detected, and sequentially displaying a reduced stroke obtained by reducing the stroke on the display unit,
For each input of a character string by handwriting input, a character string that has been character-recognized instead of displaying the reduced stroke is displayed.   When the character-recognized character is touched, the display control unit displays the corresponding reduced stroke on the display unit instead of the character and displays other character recognition candidates on the display unit. The handwriting input device according to claim 1, wherein when the other character recognition candidate is touched, the character recognition candidate is displayed instead of the reduced stroke.   When the character recognized character is touched, the display control unit displays the corresponding reduced stroke instead of the character on the display unit, and when the character is input again on the display unit, The handwriting input device according to claim 1, wherein a character recognized from a handwriting input stroke is displayed instead of the reduced stroke.   When the character recognized character is touched, the display control unit displays the corresponding reduced stroke on the display unit instead of the character, and then another character recognized character is touched. Sometimes, instead of the reduced stroke, the original character recognized character is displayed on the display unit, and the corresponding reduced stroke is displayed on the display unit instead of the another touched character. The handwriting input device according to claim 1.   When the storage area of the stroke becomes a predetermined value or less while the input of the character string by the handwriting input is continued, the character recognized from the stroke information for the stroke information of the oldest character stored in the storage area The handwriting input device according to claim 1, wherein the input character is confirmed as an input character and erased from the storage area.

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