JP3785205B2 - Tablet input device and tablet input method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for recognizing handwritten characters, numbers, and various symbols (hereinafter referred to as characters and the like) and processing a document in a device such as a word processor, a personal computer, and an electronic file.
[0002]
[Prior art]
  Conventionally, a character recognition device has a handwriting input frame consisting of a plurality of frames on a tablet.displayIf, for example, a character is pen-input into these handwriting input frames, the coordinate pattern input by the pen is compared with the reference pattern, and if both patterns match, the character code corresponding to the reference pattern is determined. Something that displays characters is provided.
[0003]
In this case, it is assumed that one character is input with a pen in one handwriting input frame. However, if the total number of handwriting input frames is small, the number of characters that can be input is limited.
[0004]
Therefore, in the prior art, in order to make up for such drawbacks, when handwriting input to all the handwriting input frames is completed, the already input frames are further divided to increase the total number of frames, so that many characters A device that enables handwriting input is provided (for example, see Japanese Patent Laid-Open No. 4-15890).
[0005]
[Problems to be solved by the invention]
However, in the above prior art, the divided handwriting input frame is exclusively for handwriting input. For this reason, in the conventional apparatus, the input function is limited, and the following problems occur when trying to expand the input function for various improvements.
[0006]
(1) When inputting a number by handwriting into the handwriting input frame displayed on the tablet, there is an input mistake or extra time is required for processing for handwriting recognition.
[0007]
Since the number is limited to 10 types of 0 to 9, it is considered that it is possible to input with a numeric keypad and the like without inputting errors and the recognition process is faster than inputting with handwriting.
[0008]
In that case, the display area on the tablet is limited, so as usual, a window is set across multiple frames of the handwriting input frame already displayed on the tablet, and the numeric keypad is overlaid. If displayed, the number of handwritten input frames is reduced, and the number of characters that can be input is limited. Also, if the numeric keypad is displayed by setting a window on a sentence or menu while avoiding the display position of the handwriting input frame, the displayed numeric keypad will be in the way and the necessary information will not be visible. .
[0009]
(2) You may want to give your favorite colors to the characters and backgrounds displayed on the tablet. To change these character colors and background colors, a color palette (color sample) is displayed in the window. It is convenient if you can display and select your favorite color.
[0010]
However, as in the case of (1), if a window is set in a state where it extends over a plurality of handwritten input frames already displayed on the tablet and the color palette is displayed as an overlay, the number of handwritten input frames is reduced. The number of characters that can be entered is limited. Also, when a color palette is displayed by setting a window on a sentence or menu while avoiding the display position of the handwriting input frame, this becomes an obstacle and the necessary information such as the sentence cannot be seen.
[0011]
(3) In order to underline or shade the characters etc. displayed on the tablet, it is convenient if the underline or shaded sample is displayed in the window and the desired underline or shade can be selected. As in the case of 1), when an underline or other sample is displayed as an overlay on the handwriting input frame, the number of handwriting input frames is limited, and when it is displayed on a sentence or menu, this becomes an obstacle. Necessary information such as sentences disappears.
[0012]
(4) When the numeric keypad is displayed and handwriting input into the handwriting input frame is disabled, when handwritten character input and number input are repeated frequently, the number of times is changed accordingly. A window for displaying a numeric keypad must be opened and closed, which makes the operation extremely complicated.
[0013]
(5) In order to display a numeric keypad or the like, it is conceivable to provide a pen button dedicated to opening and closing a window.
[0014]
However, when the display positions of the pen button and the handwriting input frame are separated from each other, and the handwritten character input and the numeric input are frequently repeated, the pen is reciprocated between the pen button and the handwriting input frame many times. It must be annoying.
[0015]
In addition, even when the pen button is small, it is difficult to touch with the pen, which is similarly troublesome.
[0016]
The present invention has been made in order to solve the above-described problems, and enables handwriting input into a handwriting input frame displayed on the tablet, and various information without causing any trouble in the handwriting input. It is an object of the present invention to make it possible to input the handwriting input by only a pen touch, and to make up for the shortage of handwriting input.
[0017]
[Means for Solving the Problems]
The present invention adopts the following configuration in order to solve the above problems.
[0018]
  The tablet input device according to claim 1 is a tablet input device that displays a plurality of handwriting input frames on a tablet, wherein the handwriting input is based on instruction means for arbitrarily instructing display of a pen touch input key, and instructions by the instruction means Key display means for displaying a plurality of pen touch input keys in at least one of the frames, and a locus of input coordinates to an input frame in which the pen touch input keys are not displayed in an environment in which the pen touch input keys are displayed Handwriting recognition means for recognizing characters, and a processing unit for uniquely determining and outputting the code of the input key from the coordinates input in the handwriting input frame on which the pen touch input key is displayed. .
[0019]
  The tablet input device according to claim 2, wherein the instruction unit instructs the display of a pen touch input key by inputting a special symbol into the handwriting input frame and causing the handwriting recognition unit to recognize the special symbol. And
[0020]
  4. The tablet input device according to claim 3, wherein when receiving an instruction from the instruction means, the key display means determines whether or not a pen touch input key is displayed in the handwriting input frame, and displays the pen touch input key when there is no display. When the display is present, the pen touch input key is erased.
[0021]
  The tablet input device according to claim 4, wherein the handwriting recognition unit recognizes a special symbol when a length of a locus of input coordinates to a handwriting input frame on which a pen touch input key is displayed is equal to or longer than a predetermined length. And
[0022]
  The tablet input method according to claim 5 is a tablet input method for recognizing a locus of input coordinates input in any of a plurality of handwritten input frames and outputting a code, and instructing display of a pen touch input key A step of displaying a plurality of pen touch input keys in at least one frame of the handwriting input frame, and an input frame in which the pen touch input key is not displayed in an environment in which the pen touch input key is displayed. Recognizing characters from the input coordinate trajectory, and unambiguously determining and outputting the input key code from the coordinates input in the handwriting input frame on which the pen touch input key is displayed. And
[0023]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing the overall configuration of the handwriting input recognition apparatus of the present invention.
[0024]
The tablet 11 can input and display characters and the like, and is composed of a tablet body for inputting coordinates and a display element such as liquid crystal or electroluminescence laminated.
[0025]
Input to the tablet 11 is performed by outputting coordinate data corresponding to the position of the tablet 11 in contact with the pen when the pen of the pen input device is brought into contact with the tablet 11.
[0026]
The tablet control unit 12 controls transfer of coordinate data output from the tablet 11.
[0027]
The handwriting input processing unit 13 controls the entire handwriting input, and when there is an input from an auxiliary pen button or a numeric keypad, which will be described later, displayed on the tablet 11, a pen touch such as these auxiliary pen button or numeric keypad. The coordinate data generated by the above is converted into a predetermined number or code corresponding thereto.
[0028]
The display control unit 15 controls the output of the tablet 11 so that the data stored in the memory 14 is reflected on the tablet 11. For example, if there is code data, the display is controlled so that it appears as a character such as letters, numbers, symbols, and the like.
[0029]
The handwriting input board control unit 16 performs processing for creating image data for display such as a handwriting input frame and auxiliary pen buttons stored in advance in the memory 14 in order to enable input to the tablet 11. .
[0030]
The output control unit 17 stores code data corresponding to characters such as characters, numbers, and symbols to be displayed on the tablet 11 in a text buffer, and reflects the contents of the text buffer on the memory 14 to store data on the tablet 11. It controls the final output.
[0031]
The handwritten character recognizing unit 18 detects a coordinate within a certain time or until there is an input indicating the end of some input, collates the pattern of coordinate change with the reference pattern, and becomes a candidate when both patterns match. A character code such as a character is output.
[0032]
FIG. 2 is a plan view showing a display state in the tablet 11.
[0033]
In the same figure, 28 is an input character displayed on the tablet 11, 26 is a cursor for indicating the input position of the character, 25 is an input board displayed on the tablet 11, and 20 is a plurality of positions located in the input board 25. A handwriting input frame 21 (comprising 8 frames in this example) and 21 are auxiliary pen buttons displayed in positions that do not overlap the handwriting input frames 20 in the input board 25.
[0034]
The auxiliary pen button 21 includes a ten key display pen button 22, a color palette key display pen button 23, and an underline / shaded key display pen button 24.
[0035]
Furthermore, 31 is a numeric keypad displayed in one handwriting input frame 20, 32 is an underline / shaded key displayed in another one handwriting input frame 20, and 33 is still another handwriting input frame 20. Is the color palette key displayed in
[0036]
Then, as shown in FIG. 3, each handwriting input frame 20 and auxiliary pen button are preliminarily shown so as to be able to specify which handwriting input frame 20 in the input board 25 or which pen button 22 to 24 is touched. 21 (22, 23, 24) are individually assigned frame numbers from “0” to “10”, and each handwritten input frame 20 has a minimum value and a maximum value within the four corners of each frame. The coordinates of two points are set. For example, for the handwriting input frame 20 corresponding to the frame number “0”, both coordinates of the minimum value (X0, Y0) and the maximum value (Y01, Y02) are set.
[0037]
Then, as shown in FIG. 4, the frame number individually assigned to each handwriting input frame 20 and the auxiliary pen button 21 (22, 23, 24) and the coordinate data of the handwriting input frame 20 are stored in the memory 14 as shown in FIG. Are registered in association with each other in advance.
[0038]
Further, as shown in FIG. 5, the memory 14 includes the above-described frames so that it can be specified in which of the handwriting input frames 20 each key 31, 32, 33 is currently displayed. Storage areas capable of storing the flags TGFLG are secured at the respective address positions corresponding to the numbers “0” to “10”.
[0039]
The data format of the flag TGFLG is assigned 1 byte for each frame number. TGFLG = 01H is displayed while the numeric keypad 31 is displayed, and TGFLG = 02H is displayed when the color palette key 33 is displayed. TGFLG = 04H is set while the hanging key is displayed.
[0040]
In this example, the display positions of the keys 31 to 33 in the input board 25 can be arbitrarily selected. However, since the display position of the auxiliary pen button 21 is fixed, the addresses “8” to “8” in FIG. “10” always stores data of TGFLG = 00H and does not change.
[0041]
Further, the position for displaying the numeric keypad 31 or the like can be arbitrarily selected by the user within the handwriting input frame 20, but the keys 31, 32, and 33 are displayed at positions as close as possible to the auxiliary pen button 21. This is convenient because pen input can be performed smoothly.
[0042]
Next, the processing operation of the handwriting input recognition apparatus having the above configuration will be described.
[0043]
(1) When entering numbers by displaying a numeric keypad in one of the handwriting input frames
First, the outline of the processing operation will be described.
[0044]
When the handwriting input mode is selected, the handwriting input board control unit 16 performs a process of displaying the handwriting input frame 20 and the auxiliary pen button 21 in the input board 25. When the numeric keypad display button 22 of the auxiliary pen buttons 21 is touched with a pen, the handwriting input processing unit 13 converts it into a predetermined code corresponding to the coordinates. When the handwriting input board control unit 16 determines that the input code is for ten-key display, the ten-key 31 is displayed on one of the handwritten input features 20.
[0045]
Next, when a pen is touched on one of the numeric keys 31, the coordinates are converted into a key code by the handwriting input processing unit 13, and the corresponding number is displayed at the position designated by the cursor 26 of the tablet 11. When the numeric keypad pen button 22 is touched again while the numeric keypad 31 is being displayed, the numeric keypad 31 is deleted and the screen returns to the normal handwriting input frame 20.
[0046]
In this way, it is possible to input numbers immediately by using the numeric keypad 31 rather than inputting numbers by hand, and when it is not necessary to input numbers, it can be used as a normal handwriting input frame 20, so that smooth input is possible. Operation becomes possible.
[0047]
Next, specific processing operations will be described with reference to the flowcharts shown in FIGS. 7 shows the details of the handwriting input processing operation in step S2 in FIG. 6, and FIG. 8 shows the details of the input processing operation of each key 31, 32, 33 in step S40 in FIG. Is shown.
[0048]
  As shown in FIG. 6, when the handwriting input mode is selected, the handwriting input board control unit 16 passes the output control unit 17 through the handwriting input board 25 and the auxiliary pen button.21The display process is executed (step l).
[0049]
At that time, all the flags TGFLG at the address positions corresponding to the frame numbers “0” to “7” in the area shown in FIG.
[0050]
Next, when the numeric keypad display button 22 of the auxiliary pen button 21 is touched with a pen, the coordinate data output from the tablet control unit 12 is converted into a key code set in advance by the handwriting input processing unit 13 and output. Outputs “8”. If the pen touch is slightly deviated from the position of the numeric keypad display button 22 and an input error occurs, it cannot be converted into a key code, so that frame number = FF is output (step 2 in FIG. 7) (step 31 in FIG. 7). 33, 42, 43, 46, 47).
[0051]
Next, it is determined whether or not the key code of the auxiliary pen button 21 is a code corresponding to the numeric keypad display button 22 (step 4). It is determined whether or not data of TGFLG = 01H is already stored as a flag at the address position of the frame number to be displayed in the memory area (step 5).
[0052]
If no data of TGFLG = 01H is stored as a flag at the address position of the frame number to be displayed, it is determined that the numeric keypad 31 is not yet displayed in the handwritten input 20 and the display of the numeric keypad 31 is displayed. Data is output to the memory 14 by the output controller 17, and the display controller 15 displays the numeric keypad 31 (step 6).
[0053]
At this time, the flag TGFLG = 01H is set at the address position corresponding to the frame number of the handwritten input feature 20 shown in FIG. In the example shown in FIG. 2, the numeric keypad 31 is displayed at a position corresponding to the frame number “6”. Therefore, in FIG. 5, TGFLG = 01H is stored at the address position corresponding to the frame number “6”.
[0054]
Next, as shown in FIG. 7, when the user touches one of the keys indicated by the numbers “0” to “9” in the numeric keypad 31 displayed in one handwritten input entry 20, the tablet Coordinate data corresponding to the touched position is output to the handwriting input processing unit 13 via the control unit 12 (step 31).
[0055]
Subsequently, the handwriting input processing unit 13 confirms that not all TGFLG = 0, that is, the keys 31 to 33 are displayed on at least one of the handwriting input frames 20 (step 33), and then performs a pen touch. With reference to the coordinate data obtained in this way and the data shown in FIG. 4, the frame number of the penwritten handwritten input frame 20 is obtained (step 34). In this example, “6” is obtained as the frame number.
[0056]
Next, referring to the data shown in FIG. 5, the content of the flag TGFLG at the address position corresponding to the frame number is confirmed, and the handwritten input frame 20 touched by the pen is in a state where any key 31 to 33 is being displayed. (Step 35), and if the handwriting input frame 20 is displaying at least one of the keys 31 to 33, a coordinate value from pen-down to pen-up is input (step 36, 37).
[0057]
If pen-up is performed, the difference between the first bent-down coordinate value and the coordinate value when pen-up is performed, and it is determined whether the maximum value (absolute value) of these differences exceeds a predetermined value. (Steps 38, 39). If the maximum value is less than the predetermined value, it is determined that the input is to the numeric keypad 31, and the process proceeds to numeric keypad input processing (step 40).
[0058]
In this numeric keypad input process, it is necessary to convert the coordinate data touched by the numeric keypad 31 into a key code corresponding to the numbers “0” to “9”, so the following process is performed.
[0059]
When the numeric keypad 31 is displayed in one handwriting input frame 20, the handwriting input board control unit 16 corresponds to the numbers “0” to “9” of the numeric keypad 31 in advance as shown in FIG. Set the coordinates of the upper left and lower right vertices of each key. For example, for the key corresponding to the number “1”, the coordinate values of (X0, Y0) and (X01, Y01) are set.
[0060]
Then, the numbers “0” to “9” of the numeric keypad 31 and the data of the coordinate values of the upper left vertex and the lower right vertex of each key corresponding to each other are stored in a predetermined area of the memory 14 as shown in FIG. Registered in association.
[0061]
Therefore, as shown in FIG. 8, the handwriting input processing unit 13 compares the coordinate value touched by the pen with the coordinate value shown in FIG. 10 (step 54), and the coordinate value obtained by the pen touch is the upper left vertex of each key. It is determined whether or not it is included in the range of the coordinate value of the lower right vertex (step 55), and if it is included in that range, a corresponding key code is obtained (step 56). For example, if the coordinate value is (X0, Y0) or more and (X01, Y01)) in FIG. 9, “0” is acquired as the key code.
[0062]
Since the handwriting input processing unit 13 returns the key code and the frame number to the handwriting input board control unit 16 (step 56), the handwriting input board control unit 16 outputs the key code to the memory 14, and the output control unit 17 Is converted from the key code into data for generating a numeric image in the final format (steps 8, 9, 11, 12).
[0063]
The display control unit 15 reflects the data in the final format on the position designated by the cursor 26 on the tablet 11.
[0064]
When the process is completed, the process returns to step 2 and waits for input.
[0065]
When the numeric keypad pen button 22 is touched again while the numeric keypad 31 is being displayed, the numeric keypad 31 is deleted and the screen returns to the normal handwriting input frame 20 (steps 1, 2, 4, 5, and 7).
[0066]
(2) When displaying a color palette in one of the handwriting input frames and changing the color of characters, etc.
First, the outline of the processing operation will be described.
[0067]
When handwriting input is selected, the handwriting input board control unit 16 performs processing for displaying the handwriting input frame 20 and the auxiliary pen button 21 in the input board 25. When the color palette key display button 23 of the auxiliary pen buttons 21 is touched with a pen, the handwriting input processing unit 13 converts the button to a predetermined code corresponding to the coordinates. When the handwriting input board control unit 16 determines that the input code is for color palette key display, the color palette key 33 is displayed on one of the handwritten input words 20.
[0068]
Next, when a pen touch is made on one of the color palette keys 33, the coordinates are converted into a key code by the handwriting input processing unit 13. If the handwriting input board control unit 16 determines that the input key code corresponds to the key code of the color palette key, the character at the position specified by the cursor or the like is changed to a color corresponding to the key code. change. If the color palette key display pen button 23 is touched again while the color palette key 33 is being displayed, the color palette key 33 is deleted and the normal handwriting input frame 20 is restored.
[0069]
In this way, the color can be changed while inputting characters and the like, and when the color change is not necessary, since it can be used as a normal handwriting input frame 20, a smooth input operation is possible.
[0070]
Next, a specific processing operation in this case will be described with reference to a flowchart.
[0071]
Since the basic processing flow is the same as that of the ten-key 31 input described in (1), it will be briefly described.
[0072]
As shown in FIG. 6, the handwriting input board 25 is displayed, and the handwriting input processing unit 13 obtains the code and the frame number indicating the display of the color palette key 33 (steps 1 and 2), and the handwriting input board control The unit 16 performs display processing of the color palette key 33 in step 6 as in the case of (1).
[0073]
In that case, a flag is set at the address position corresponding to the handwritten input frame displaying the color palette key 33 in the memory area of FIG. In this example, TGFLG = 02H is stored at the address position corresponding to the frame number “3”.
[0074]
Next, as shown in FIG. 7, when the user touches one of the color palette keys 33 for color selection, the tablet control unit 12 outputs the corresponding coordinate value data to the handwriting input processing unit 13. .
[0075]
The handwriting input processing unit 13 confirms that not all TGFLG = 0, that is, the keys 31 to 33 are displayed in at least one of the handwriting input frames 20 (step 33), and then the handwritten pen-down. A frame number (frame number “3” in this example) of the input frame 20 is obtained (step 34). Subsequently, referring to the data shown in FIG. 5, the flag TGFLG at the address position corresponding to the frame number is determined. The content is confirmed, and if the handwriting input frame 20 is displaying at least one of the keys 31 to 33, the coordinate value from pen down to pen up is input (steps 35, 36, 37).
[0076]
Then, it is determined whether the maximum value (absolute value) of the coordinate value difference exceeds a predetermined value (steps 38 and 39). If the maximum value is less than the predetermined value, it is determined that the input to the color palette key 33 is made. Then, the process proceeds to input processing to the color palette key 33 (step 40).
[0077]
Here, the relationship between the coordinate value of each key of the color palette key 33 and the key code is the same as in the case of the above-described numeric keypad 31 shown in FIGS. Therefore, the handwriting input processing unit 13 compares the coordinate value input by the pen touch with the data shown in FIG. 10 (step 52), and if within the range of the corresponding coordinate value, the range of the coordinate value (Step 58).
[0078]
The handwriting input board control unit 13 receives this key code, and the output control unit 17 converts the update state of the memory 14 into data in the final format, and the display control unit 15 reflects it on the tablet 11 (step 11, 12).
[0079]
When the color palette key display pen button 23 is touched again while the color palette key 33 is being displayed, the color palette key 33 is deleted and the screen returns to the normal handwriting input frame 20 (steps 1, 2, 4, 5, 7). ).
[0080]
(3) When an underline / shading key is displayed in one of the handwriting input frames and underlining / shading is performed
First, the outline of the processing operation will be described.
[0081]
When handwriting input is selected, the handwriting input board control unit 16 performs processing for displaying the handwriting input frame 20 and the auxiliary pen button 21 in the input board 25. When the underline / shaded key display button 24 of the auxiliary pen buttons 21 is touched with a pen, the handwriting input processing unit 13 converts the button into a predetermined code corresponding to the coordinates. When the handwriting input board control unit 16 determines that the input code is for underline / shading key display, the underline / shading key 32 is displayed on one of the handwritten input screens 20.
[0082]
Next, when one of the underline / shaded keys 32 is touched with a pen, the coordinates are converted into a key code by the handwriting input processing unit 13. If the handwritten input board control unit 16 determines that the input key code corresponds to the key code of the underline / shaded key, it is designated for the character at the position designated by the cursor or the like. Underline and shade. When the underline / shaded key display pen button 24 is touched again while the underline / shaded key 32 is displayed, the underline / shaded key 32 is erased and the normal handwriting input frame 20 is restored.
[0083]
In this way, underline and shading can be performed while inputting characters and the like, and when underline and shading are not required, since it can be used as a normal handwriting input frame 20, a smooth input operation is possible.
[0084]
Next, a specific processing operation in this case will be described with reference to a flowchart.
[0085]
In this case as well, the flow of processing is the same as (1) and (2), so a brief description will be given.
[0086]
As shown in FIG. 6, the handwriting input board 25 is displayed, and the handwriting input processing unit 13 obtains the code indicating the display of the underline / shaded key 32 and the frame number (steps 1 and 2). The board control unit 16 performs display processing of the underline / shaded key 32 in step 6 as in the case of (1).
[0087]
In this case, a flag is set at the address position corresponding to the handwritten input frame displaying the underline / shaded key 32 in the memory area of FIG. In this example, TGFLG = 04H is stored at the address position corresponding to the frame number “7”.
[0088]
Next, as shown in FIG. 7, when one of the underline / shaded keys 32 is touched with a pen for underlining / shading, the tablet control unit 12 inputs the data of the corresponding coordinate values into the handwriting input processing unit. 13 is output.
[0089]
The handwriting input processing unit 13 confirms that not all TGFLG = 0, that is, the keys 31 to 33 are displayed in at least one of the handwriting input frames 20 (step 33), and then the handwritten pen-down. The frame number of the input frame 20 (in this example, the frame number “7”) is obtained (step 34). Subsequently, referring to the data shown in FIG. 5, the flag TGFLG at the address position corresponding to the frame number is determined. The content is confirmed, and if the handwriting input frame 20 is displaying at least one of the keys 31 to 33, the coordinate value from pen down to pen up is input (steps 35, 36, 37).
[0090]
Then, it is determined whether or not the maximum value (absolute value) of the coordinate value difference exceeds a predetermined value (steps 38 and 39). If the maximum value is less than the predetermined value, input to the underline / shaded key 32 is performed. Judgment is made, and the process proceeds to input processing to the underline / shaded key 32 (step 40).
[0091]
Here, the relationship between the coordinate value of each key of the underline / shaded key 32 and the key code is the same as that of the above-described numeric keypad 31 shown in FIGS. Therefore, the handwriting input processing unit 13 compares the coordinate value input by the pen touch with the data shown in FIG. 10 (step 53), and if within the range of the corresponding coordinate value, the range of the coordinate value (Step 61).
[0092]
The handwriting input board control unit 13 receives this key code and outputs the key code superimposed on the code of the address corresponding to the position where the cursor 26 is displayed.
[0093]
The output control unit 17 converts this code into data in the final display format, and the display control unit 15 reflects it on the tablet 11 (steps 11 and 12).
[0094]
When the underline / shading key display pen button 24 is touched again while the underline / shading key 32 is being displayed, the underline / shading key 32 is erased and the screen returns to the normal handwriting input frame 20 (steps 1 and 2). , 4, 5, 7).
[0095]
(4) When handwritten input is performed using a handwritten input frame while a numeric keypad is displayed in the handwritten input frame
First, the outline of the processing operation will be described.
[0096]
When at least one of the numeric keypad 31, the color palette key 33, and the underline / shaded key 32 is displayed in the handwriting input frame, the input operation to these keys 31, 32, 33 is not performed. When there is a handwriting input to the handwriting input frame 20, the handwriting input processing unit 13 acquires coordinate values from pen-up to pen-down every predetermined time, and at the same time, from the pen-down to the pen-up, The distance that the tip has moved or the amount of change in the coordinate value of the pen within a predetermined time is calculated.
[0097]
When the change amount of the coordinate value exceeds a preset reference value, it is regarded as input of a handwritten character, and the handwritten character recognition processing unit 18 collates the character pattern with the reference pattern by the coordinate change to generate a key code. Normal handwriting recognition processing is performed.
[0098]
As described above, even when the numeric keypad 31 or the like is being displayed, handwritten input to the handwritten input style 20 is possible, so that it is not necessary to frequently open and close the window for color change, and document editing processing can be performed quickly. Can be done.
[0099]
Next, a specific processing operation in this case will be described with reference to a flowchart.
[0100]
Here, as an example, description will be given in a state where the above-described numeric keypad is already displayed.
[0101]
As shown in FIG. 7, when a pen is touched on one of the handwriting input frames 20, coordinate data corresponding to the touched position is output to the handwriting input processing unit 13 via the tablet control unit 12 (step 31). .
[0102]
Subsequently, the handwriting input processing unit 13 confirms that not all TGFLG = 0, that is, the keys 31 to 33 are displayed on at least one of the handwriting input frames 20 (step 33), and then performs a pen touch. With reference to the coordinate data obtained in this way and the data shown in FIG. 4, the frame number of the penwritten handwritten input frame 20 is obtained (step 34).
[0103]
Next, referring to the data shown in FIG. 5, the content of the flag TGFLG at the address position corresponding to the frame number is confirmed, and the handwritten input frame 20 touched by the pen is in a state where any key 31 to 33 is being displayed. It is determined whether or not (step 35). If the handwritten input frame 20 does not display any of the keys 31 to 33, it is determined that the input is handwritten, and handwritten character recognition processing is performed (step 43).
[0104]
If at least one key 31-33 is being displayed in the handwriting input frame 20 in step 35, the coordinate value from pen-down to pen-up is input (steps 36, 37), and the difference between these coordinate values. It is determined whether the maximum value (absolute value) exceeds a predetermined value (steps 38 and 39). If the maximum value is less than the predetermined value, it is determined that the input is to the numeric keypad 31, and the process proceeds to numeric keypad input processing (step 40). On the other hand, if the maximum value is not less than the predetermined value in step 39, the process proceeds to handwritten character recognition processing (step 44). Then, the obtained character code and frame number are returned to the handwriting input board control unit 16.
[0105]
(5) When displaying / erasing numeric keys etc. by entering special symbols in handwritten input
First, the outline of the processing operation will be described.
[0106]
When a predetermined special symbol (hereinafter, this symbol is referred to as a gesture) is written in one handwriting input frame 20 with a pen in a state where no pen touches any of the auxiliary pen buttons 21, a handwriting input processing unit In 13, the gesture is compared with a coordinate pattern stored in advance in the memory 14. As a result, when it is determined that both patterns match, the keys 31 to 33 corresponding to the type of the gesture are displayed in the handwritten input style 20 in which the gesture is input. Thereby, the numeric keypad 31 and the like can be displayed without operating the auxiliary pen button 21. Thereafter, processing according to (1) to (4) is performed.
[0107]
When a predetermined gesture input is performed again on one of the remaining handwriting input frames 20 while the numeric keypad 31 is displayed in the handwriting input frame 20, a handwriting recognition process for the gesture is performed, and the gesture and If it is determined, the numeric keypad 31 and the like displayed in the handwriting input frame 20 in which the gesture input has been performed is deleted, and the normal handwritten input style 20 is restored.
[0108]
In this way, the convenience can be improved because the numeric keypad 31 can be displayed / erased without using the auxiliary pen button 21.
[0109]
Next, a specific processing operation in this case will be described with reference to a flowchart. Here, the description of the operation overlapping with the contents of the above (1) to (4) is omitted, and only necessary portions will be described.
[0110]
As an example, a procedure for displaying the numeric keypad 31 will be described.
[0111]
As shown in FIG. 7, a special symbol for displaying the numeric keypad 31 is input by handwriting in one of the handwriting input frames 20. At this time, after acquiring the pen-down coordinate value in step 31 as described above, the handwriting input processing unit 13 refers to the memory area shown in FIG. 5 and determines whether all the flags TGFLG are 0 or not ( Step 33). When all TGFLG = 0, that is, when the keys 31 to 33 are not displayed in any of the handwriting input frames 20, the coordinate values are converted into frame numbers as described above, and then the process proceeds to handwritten character recognition processing. (Steps 42 and 43).
[0112]
As shown in FIG. 6, if a handwritten character is recognized as a gesture for displaying the numeric keypad 31, a flag TGFLG at an address position corresponding to the frame number is set with reference to the memory area shown in FIG. 5. Unless TGFLG = 01H indicating that the numeric key 31 is being displayed, the numeric key 31 is displayed (steps 5 and 6). At this time, the flag TGFLG = 01H indicating that the numeric keypad 31 is being displayed is stored at the address position corresponding to the predetermined frame number in FIG.
[0113]
Next, a procedure for deleting the numeric keypad 31 will be described.
[0114]
As shown in FIG. 7, a gesture for erasing the numeric keypad 31 is input by handwriting from above the numeric keypad 31 displayed in one of the handwriting input frames 20. This gesture may be the same as the gesture for displaying the numeric keypad 31, or may be a different gesture.
[0115]
As described above, after acquiring the coordinate value pen-down in step 31, it is determined whether or not all the flags TGFLG are 0 in the memory area of FIG. 5 (step 33). Here, since it is assumed that the numeric keypad 31 is currently displayed, not all the flags TGFLG = 0, and the process proceeds to step 34.
[0116]
Next, the frame number is obtained from the coordinate value of the pen input position with reference to the data in FIG. 5 (step 34). Since the flag TGFLG at the position corresponding to this frame number should be 0, the process proceeds to the handwritten character recognition process (steps 36 to 39) in which the numeric keypad 31 is displayed.
[0117]
When the special code for deleting the numeric keypad 31 is acquired by the handwriting recognition process, the frame number and the special code are returned to the handwriting input board control unit 16.
[0118]
If it is determined in step 4 of FIG. 6 that the numeric keypad 31 is to be erased, the numeric keypad 31 is erased and then the data of the flag TGFLG in the frame number is cleared.
[0119]
【The invention's effect】
The present invention has the following effects.
[0120]
According to the present invention, within a predetermined frame of a plurality of handwriting input frames,Enter frequently used numbers, etc.Numeric keypadOr, it is troublesome to specify colors for handwriting inputColor palette key to performSpecify underline / shadingUnderline / shaded keys, etc.Input is possible only with a pen touchVarious key patterns can be selected and displayed based on instructionsSoAs before, handwriting input into multiple handwriting input frames is possible,Save input time and effort compared to handwriting inputThe pen touch input can be selected as necessary, and an input having the advantages of both handwriting input and pen touch input can be performed.
[0121]
In addition, the numeric keypad, the color palette key, and the underline / shaded key are each displayed in one handwriting input frame, so that these keys do not interfere with the already displayed text or the like.
[0122]
Further, according to the present invention, when the position of the pen button dedicated to display / deletion of each key is different from the handwriting input frame, or when a small pen button is frequently pen-touched, an input error or an input operation is performed. On the contrary, if you can display or erase the numeric keypad, color palette key, underline / shaded key, etc. in the handwriting input frame by entering a specific pattern in the handwriting input frame, These disadvantages are eliminated and convenience is enhanced.
[0123]
In addition, according to the present invention, handwriting can be input even in a handwriting input frame in which a numeric keypad, a color palette key, an underline / shaded key, etc. are displayed. Input frames can be used effectively. In addition, since there is no need to frequently open and close windows for changing colors, the conventional complexity can be eliminated, and document editing processing can be performed quickly.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the overall configuration of a handwriting input recognition apparatus of the present invention.
FIG. 2 is a plan view showing a display state on a tablet.
FIG. 3 is an explanatory diagram showing a relationship among a handwritten input frame, an auxiliary pen button and an associated frame number in an input board displayed on a tablet.
FIG. 4 is a memory map diagram in which a frame number of a handwritten input frame in an input board displayed on a tablet is associated with coordinates of each frame.
FIG. 5 is a memory map diagram showing a flag storage area for indicating in which handwriting input frame on the tablet a numeric keypad or the like is displayed.
FIG. 6 is a flowchart for explaining the overall operation of the handwriting input recognition apparatus of the present invention.
FIG. 7 is a flowchart showing details of a handwriting input processing operation in step S2 in FIG.
FIG. 8 is a flowchart showing details of an input processing operation of each key in step S40 in FIG.
FIG. 9 is an explanatory diagram showing a relationship between each key constituting the numeric keypad and coordinate values of two corners corresponding to each key.
FIG. 10 is a memory map diagram in which each key constituting the numeric keypad is associated with coordinate values of two corners corresponding to each key.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Tablet, 12 ... Tablet control part, 13 ... Handwritten input process part, 14 ... Memory, 16 ... Handwritten input board control part, 17 ... Output control part, 18 ... Handwritten character recognition part, 20 ... Handwritten input frame, 25 ... Input board 31... Numeric keypad 32. Underline / shaded key 33. Color palette key

Claims (5)

In the tablet input device for displaying a handwriting input frame of several on the tablet,
Instruction means for arbitrarily indicating the display of the pen touch input key;
Key display means for displaying a plurality of pen touch input keys in at least one frame of the handwriting input frame based on an instruction by the instruction means;
Handwriting recognition means for performing character recognition from a locus of input coordinates to an input frame in which the pen touch input key is not displayed in an environment in which the pen touch input key is displayed;
A processing unit that uniquely determines and outputs the code of the input key from the coordinates input in the handwriting input frame on which the pen touch input key is displayed ;
A tablet input device comprising: 2. The tablet according to claim 1, wherein the instruction unit instructs to display a pen touch input key by inputting a special symbol into the handwriting input frame and causing the handwriting recognition unit to recognize the special symbol. Input device. When receiving an instruction from the instruction unit, the key display unit determines whether or not the pen touch input key is displayed in the handwriting input frame, displays the pen touch input key when there is no display, and displays the pen touch input key when there is a display. The tablet input device according to claim 1, wherein the tablet input device is erased. 4. The handwriting recognition means recognizes a special symbol when the length of a locus of input coordinates to a handwriting input frame in which a pen touch input key is displayed is a predetermined length or more. tablet input device according to. A tablet input method for outputting a code recognizes the trajectory of the inputted input coordinates to one of the frame of the handwriting input frame of multiple,
Instructing the display of the pen touch input key;
Displaying a plurality of pen touch input keys in at least one frame of the handwriting input frame ;
Performing character recognition from the locus of input coordinates to an input frame in which the pen touch input key is not displayed in an environment in which the pen touch input key is displayed;
A step of uniquely determining and outputting the code of the input key from the coordinates input in the handwriting input frame on which the pen touch input key is displayed;
A tablet input method comprising:

Images