JPH05127810A - Handwritten character processor - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to write a handwritten character input from a tablet by changing the thickness of the line and the thickness of the line depending on the speed and pressing force of the pen on the operating tablet. An object of the present invention is to provide a handwritten character processing device that can output while giving a feeling. [Structure] A CPU 12, a tablet 15 connected to the CPU 12, a memory 16 including a dot matrix, and a display device 13 are connected to each other, and handwriting characters obtained by pen operation on the tablet 15 are detected by a detected pen operation amount ( Based on the speed and pressing force), the line thickness and density are developed as dot image data on the dot matrix,
This image data is sequentially displayed on the display device 13, and the handwriting input character on the tablet 15 is output on the screen while adding a feeling of handwriting corresponding to the pen operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handwritten character processing apparatus, and more particularly to a handwritten character processing apparatus for outputting a character handwritten by externally operating a tablet or the like while adding a feeling of handwriting.

[0002]

2. Description of the Related Art FIG. 13 is a schematic configuration diagram of a conventional handwritten character processing apparatus.

In the figure, the handwritten character processing device includes a CPU (abbreviation of central processing unit) 12 for centrally managing and controlling the device itself. The CPU 12 is an input device 11 including a keyboard for inputting data from the outside,
A display device 13 including a CRT (cathode ray tube), a text buffer 14 for storing character data and the like input and processed by the device, a mouse 15a, and image data obtained by externally operating the mouse 15a are displayed. The memory 16 for storing is connected.

In the conventional handwritten character processing apparatus described above, if the mouse 15a is moved on the desk to draw a line or the like, the data relating to the movement of the mouse is sequentially read by the CPU1.
Given to 2. The CPU 12 processes the given data by an application program for creating image data and the like obtained by moving the mouse 15a, and fills the trace of the mouse as it is with a predetermined line thickness to CRT. An image was output to the display device 13 such as.

FIG. 14 is a diagram showing a display example of an operation screen in the handwritten character processing apparatus of FIG. 13 above.

In FIG. 14, on the operation screen displayed on the display device 13, the locus of the mouse 15a that arbitrarily moves on the desk is displayed on the screen with a line having a thickness designated by the designation unit 13a. In other words, the user previously specifies the thickness of the line in the specification unit 13a, moves the mouse 15a to the starting point 13c where the line is to be drawn, moves the cursor to the starting point 13c, and holds the button of the mouse 15a from there. By moving on the desk, a line as shown on the operation unit 13b is drawn with a predetermined thickness.

[0007]

As described above, in the conventional handwritten character processing apparatus, as shown in FIG. 14, when the mouse 15a is manually operated and moved on the desk or the mat, the mouse 15a is displayed accordingly. Since the cursor moves in conjunction with the operation unit 13b of the device 13, it is possible to input a relative position on the operation unit 13b, but it is easy to write characters on a piece of paper with a pencil or pole pen. There was a problem that it was difficult to write.

In order to solve this problem, a method of writing a character by operating a pen such as a tablet has been provided. In pen operation of a tablet or the like, the desired character can be written on the tablet by operating the pen as easily as writing a character on paper with an actual pencil or ballpoint pen, so it is more convenient than using the mouse 15a described above. However, it has the advantage of excellent operability.

However, there is a problem in that it is not possible to obtain a feeling of handwriting even when writing characters by operating a pen on this tablet or the like. In other words, when actually writing on a piece of paper such as paper, the line thickness and color density of the letters change subtly depending on the speed at which a person moves the pen and the pressure with which the pen is pressed. However, with the above-mentioned mouse and tablet, following the changes in the speed and pressing force to move it,
There is a problem in that the thickness and color density of the drawn line do not change and are always constant, so that it is not possible to express a handwritten character with the sense of handwriting desired by the user.

Therefore, it is an object of the present invention to provide a handwritten character processing apparatus capable of expressing a feeling of a handwriting which a user desires for a drawn character when the user draws a character or the like on a tablet with a pen. It is to be.

[0011]

A handwritten character processing apparatus according to the present invention comprises a detection means, a storage means, a speed calculation means, a thickness determination means, a density determination means, and a data writing means. Further, it comprises an output means.

The detecting means includes a pen that is externally operated to input a figure including a character by handwriting. When the tip of the pen comes into contact with the main surface of the pen, the position of the contact and the position of the pen. The storage means is configured to detect a pressing force, and the storage means is configured to include a dot matrix having a size relatively equal to that of the main surface.

The speed calculation means is configured to input the contact position detected by the detection means every predetermined period and to calculate the operation speed of the pen accordingly.

The thickness determining means is configured to determine the thickness of the locus of the pen on the basis of the operation speed calculated by the speed calculating means or the pressing force detected by the detecting means.
The density determining means is configured to determine the density of the locus based on the operation speed calculated by the speed calculating means.

The data writing means converts the locus into image data based on the contact position output by the detecting means and at least one of the thickness determined by the thickness determining means and the density determined by the density determining means, and stores the image data. The writing means is configured to write in the dot matrix, and the output means is configured to sequentially read out and output the image data written by the data writing means from the dot matrix.

[0016]

In the handwritten character processing apparatus according to the present invention, the pen of the detecting means is externally operated and the trajectory of the pen when its main surface is traced by the pen is detected by the detecting means. Based on the operation amount including the operation speed of the pen calculated by the speed calculation means, image data is stored in the dot matrix, and externally output in real time through the sequential output means. Indicates "change in darkness" and "change in thickness" according to the amount of operation of the pen, so that a figure including a character with a sense of handwriting can be obtained as in the case of writing a character on the paper. ..

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a handwritten character processing apparatus according to an embodiment of the present invention. In the figure, handwritten character processing device 20 includes a CPU 12 for centrally managing and controlling the device itself. The CPU 12 includes an input device 11 including a keyboard for inputting data and the like from the outside, a display device 13 such as a CRT, and a text buffer 14 for storing character data and the like input from the outside and obtained by data processing. A tablet 15 and a memory 16 provided to input handwritten characters from the outside are connected.

The display device 13 including a CRT is integrally provided with a light pen for displaying a menu screen or the like on the display screen so that the user can select a desired menu. When the user refers to the menu code on the screen and picks the desired menu with the light pen, the position of the picked position on the screen is detected, and the detection signal is given to the CPU 12, and the CPU 12
Can check the selected menu code.

The text buffer 14 is a memory for storing a set of a series of character data input by handwriting in the device 20 as text data, and the data stored therein is displayed via the display device 13. In addition to the screen output, it is also possible to print out via a printer or the like (not shown), and it is also possible to transfer data to a flexible disk which is an external storage medium.

Details of the tablet 15 will be described later. The memory 16 is a memory for storing image data, and has a dot matrix having a size relatively equal to the data input area of the tablet 15.

FIG. 2 shows the tablet 1 shown in FIG. 1 above.
5 is a diagram for explaining the configuration of FIG. 5 and the data input / output relationship between the tablet 15 and the CPU 12. FIG.

In FIG. 2, the tablet 15 is integrally connected to the pen 17, and the user traces a desired character or figure on the tablet 15 with the pen 17 to easily input character data or figure data to the CPU 12. can do.

The pen 17 has a piezoelectric element for detecting the pressure in the axial direction of the pen 17, and when the user presses the pen 17 against the tablet 15, the piezoelectric element detects the pressing force and the tablet is pressed. The pressure signal T3 is output to the CPU 12 via 15. The position of the pen 17 on the tablet 15 is obtained by detecting the coordinates of the input point of the pen 17 based on the so-called origin on the tablet 15 by a generally known electromagnetic induction method, electrostatic method, or the like. The position detection signal based on these signals is given to the CPU 12 as a coordinate signal T2.

The pen 17 also outputs a pen switch signal T1 to the CPU 12. When the signal T1 is input, the CPU 12 processes it as an external interrupt signal. The pen switch signal T1 is a signal that is activated when there is an output of the piezoelectric element incorporated in the pen 17.

As shown, the user places the pen 17 at the starting point on the tablet 15 where he wants to draw a line, and then moves the pen 17 from there to generate successive signals T1 through T3.
Are given to the CPU 12. As a result, the CPU 12 turns on the dots on the corresponding dot matrix of the memory 16. In this way, the dot matrix in which ON and OFF are stored in dot units is stored in the memory 16 as image data of characters manually input on the tablet 15. By controlling the CPU 12 to display the dot matrix of the memory 16 on the display device 13 as appropriate, the user can confirm the characters drawn on the screen displayed by the display device 13 while operating the pen 17.

When the user wants to finish the character input, the pen 17 is separated from the tablet 15 to bring the pen 17 and the tablet 15 into a non-contact state.

The fact that the pen 17 has come into contact with the tablet 15 is revealed by the pen switch signal T1 which externally interrupts the CPU 12 when the pen 17 contacts the tablet 15.

While the pen 17 is in contact with the tablet 15 and is moving, the CPU 12 makes an internal interrupt at regular intervals (for example, 0.1 sec) and inputs the coordinate signal T2 to input the coordinate signal T2. Get the current position (coordinates) on the top. At this time, the dot matrix data of the memory 16 is updated in real time, and the display data on the screen of the display device 13 is updated accordingly.

When the user releases the pen 17 from the tablet 15 to end the character input, the piezoelectric element output level of the pen 17 disables the pen switch signal T1 accordingly,
In response, the CPU 12 recognizes that the handwriting character input by the pen 17 has ended (temporarily stopped).

FIG. 3 is a diagram showing an example of a display screen when the initial value of the pen operation amount on the tablet shown in FIG. 2 is set.

As shown in FIG. 3, in this case, the basic thickness of the handwritten character line is 0.5 mm, and the speed ratio of the pen 17 is 1, which is the display screen obtained when the initial setting is made. The pressure ratio of the pen 17 can be set instead of the speed ratio. The basic thickness and speed ratio (pressure ratio) of this line can be set by the user by inputting data from the input device 11 including a keyboard, and by displaying a menu screen on the display device 13, the user can display the screen. By picking the top with a light pen, the desired basic line thickness and speed ratio (pressure ratio)
May be given to the CPU 12.

As shown in FIG. 3, the basic line thickness of the handwritten character which the user is about to enter and the pen 1
If you set the speed ratio (pressure ratio) of 7 in advance,
Based on these data, image data processing for handwritten characters to be inputted is performed.

FIGS. 4A and 4B are graphs showing the relationship between the speed and pressure during pen operation and the line thickness of handwritten characters according to an embodiment of the present invention.

In FIG. 4A, the line thickness of the character drawn on the vertical axis is taken, and the operation speed of the pen is taken on the horizontal axis. In FIG. 4B, the vertical axis represents the thickness of the character line, and the horizontal axis represents the pressing force that is the operation amount of the pen. In both cases, the larger the initial setting of the line thickness of the character, the greater the inclination of the graph. In other words, the change in the line thickness of the character is more rapid following the change in the operation speed (pressure) of the pen. It means that.

FIG. 5 is a diagram showing a table for determining the line thickness of a handwritten character from the basic line thickness and the pen operation speed according to an embodiment of the present invention.

FIG. 6 is a diagram showing a table for determining the line thickness of a handwritten character from the basic line thickness and the pen pressing force according to an embodiment of the present invention.

Table TB1 shown in FIGS. 5 and 6
And TB2 are respectively stored in an internal memory (not shown) of the CPU 12 and appropriately accessed by the CPU 12 itself. For example, when the basic line thickness of 0.5 mm (reference thickness 1) and the speed ratio 1 (slow) are initialized as shown in FIG. 3, the CPU 12 accesses the table TB1 of FIG. The line thickness of handwritten characters to be drawn from now on is specified as 4 dots. After that, when the user operates the pen 17 to increase the speed to 2 (standard), the CPU 12 accesses the table TB1 so that the line thickness is thinned as shown in FIG. Change the line thickness of handwritten characters to 3 dots. When the speed further increases and rises to 3 (fast), the CPU 12 accordingly changes the character thickness to 2 dots. As a result, in the same way as when writing characters on paper with a normal ballpoint pen, etc., the setting data is changed sequentially so that the faster the pen 17 is moved, the thinner the line thickness of the handwritten character becomes. Is performed.

Similarly, as to the operation pressing force of the pen 17, the CPU 12 successively detects the pressing force of the pen 17 as shown in the table TB2, and the thick line of the handwritten character drawn following the change. Table T to change the height
Access B2. Therefore, in the same manner as when writing characters on paper using a ballpoint pen or the like, as shown in FIG.
As shown in (b), the lighter the pen is, the thinner the line width of the handwritten character becomes. On the contrary, the harder the pen is, the thicker the line of the character becomes. Changes can be made easily.

FIG. 7 is a process flow diagram for inputting initial values of handwriting character line thickness and pen operation amount according to an embodiment of the present invention.

The process flow shown in the figure is stored as a program in the internal memory of the CPU 12 in advance. The execution of this program is performed under the control of the CPU 12.

Step S1 in FIG. 7 (abbreviated as S1 in the figure)
In, the CPU 12 first inputs data for specifying the thickness of the reference line selected by the user. afterwards,
The process proceeds to the next step S2, and the reference value of the speed (pressing force) which is the operation amount of the pen 17 selected by the user is input. Each of the input values is temporarily stored in the internal register of the CPU 12. Also, these initial setting values are displayed on the screen as shown in FIG. 3 above according to the user's desire.

The CPU 12 accesses the table TB1 or the table TB2 stored in advance on the basis of the data regarding the initially set reference line thickness and the reference speed (pressing force), and the hand to be drawn from now on. Specifies the thickness (in dots) of calligraphy characters.

FIG. 8 is a processing flow chart for changing the line thickness of the handwritten character in accordance with the operation speed of the pen according to the embodiment of the present invention.

This processing flow is stored as a program in the internal memory of the CPU 12 in advance, and the CP
It is executed under the control of U12.

Further, this processing flow is started in response to an internal interrupt of the CPU 12 (every fixed time: every 0.1 sec).

First, the CPU 12 determines whether or not the pen 17 is currently in contact with the tablet 15 in the process of step S11 by inputting the pen switch signal T1. If the signal T1 is not input at that time, the pen 17 is in a non-contact state with the tablet 15, so that the subsequent processing is not performed and the processing returns to the processing of step S11.

In the processing of step S11, the signal T1
When it is confirmed that the pen 17 is in contact with the tablet 15, the CPU 12 inputs the coordinate signal T2 and the coordinates of the pen 17 on the tablet 15 in the process of the next step S12. This coordinate value is temporarily stored in an internal register. After that, in the processing of the next step S13, it is determined whether or not the pen 17 is continuously in contact with the tablet 15, that is, whether or not the pen 17 is in a character input state. In this determination, the CPU 12 compares the previous contact state data stored in advance in the internal register with the present contact state data, and the pen 17 is not moving unless the contact is continuously ON. Therefore, the process returns to step S11. Return.

When it is determined in the process of step S13 that the pen 17 is moving and the handwritten character is being input, the processes of step S14 and thereafter are executed.

In the processes of steps S14 and S15, the operation speed of the handwriting input of the pen 17 is calculated. That is, the CPU 12 calculates the speed of the pen 17 by taking the difference between the previous input coordinate value stored in the internal register in advance and the current input coordinate value, and dividing the difference by the above-mentioned constant time (0.1 sec). To do.

In the processing of step S16, the CPU 12 accesses the table TB1 based on the calculated speed of the pen 17 and draws a line between the previous coordinate and the current coordinate with a corresponding thickness (dot). .. CPU in detail
12 accesses the dot matrix of the memory 16, and fills between the two points corresponding to the previous input coordinate and the current input coordinate on the matrix with the line of the thickness (dot) obtained by accessing the table TB1. Then, the dot on the corresponding matrix is set to ON. As a result, a line having a thickness corresponding to the pen speed is drawn between the two points corresponding to the display screen of the display device 13.

If it is determined in step S13 that the pen 17 is not continuously in the contact ON state, the speed is not calculated and the thickness of the line is not changed based on the calculated speed. The previous line thickness is retained. If the previous input coordinates are not held in the register, the current input coordinates will be the starting point for handwritten character input.

FIG. 9 is a processing flow chart for changing the line thickness of handwritten characters in accordance with the change in the pen pressing force according to the embodiment of the present invention.

This processing flow is stored as a program in the internal memory of the CPU 12 in advance and is executed under the control of the CPU 12. Further, this processing flow is started by an internal interrupt of the CPU 12 at regular time intervals (every 0.1 seconds).

In the processing of step S21, the CPU
12 receives the pen switch signal T1 and responds to the pen 17
Determines whether is in contact with the tablet 15.
At this time, in the non-contact state, the subsequent processing is not performed and the processing of step S21 is performed again.

When it is determined that the pen 17 is in contact with the tablet 15 and is ready for handwritten character input,
In the process of step S22, the CPU 12 causes the coordinate signal T
2 is input, and the current coordinates of the pen 17 are input. This input coordinate is temporarily stored in the internal register of the CPU 12.

After that, the CPU 12 shifts to the processing of step S23 and determines whether or not the pen 17 is continuously in contact. When the CPU 12 determines that the pen 17 is not in contact with the tablet 15 continuously, the CPU 12 accordingly shifts to the process of step S21.

When it is determined in the process of step S23 that the pen 17 is continuously in contact with the pen 17 and the pen 17 is operated to input handwritten characters, the process of step S24 is performed, and the CPU 12 causes the pressure signal T3. The current pressing force of the pen 17 is detected based on

Then, in the processing of step S25, C
The PU 12 performs processing so as to draw a line between the previous coordinate and the current coordinate with the thickness corresponding to the detected pressure. In detail, the CPU 12 determines the table T based on the detected pressure.
B2 is accessed and the corresponding thickness (dot) is read. C
The PU 12 accesses the dot matrix of the memory 16 based on the read dot width, and turns on the corresponding dot so as to fill the line between the corresponding previous coordinate and the present coordinate on the matrix. As a result, the image data of the handwritten character up to the present is stored in the dot matrix of the memory 16, and the image data is successively displayed on the display device 13 by the CPU 12 so that the user can follow the operation of the pen 17 at the present time. Will be displayed on the screen.

It should be noted that in the process of step S23, the pen 17 is not in the detection state continuously, and the pen 17 does not detect the tablet 1.
If the handwriting character input is interrupted or started at one point on 5, the processing for changing the character thickness based on the detected pressure is not performed. If it is determined in step S23 that the input of the signal T1 this time is due to the start of the handwritten character, the handwritten character is written with the basic line thickness initialized by the user in advance. ..

FIG. 10 shows that the handwriting character line thickness is changed in accordance with the change in the pen operation speed according to one embodiment of the present invention, and the handwriting is performed in accordance with the change in the pen operation pressing force. It is a processing flow figure for changing the line density of a character.

This processing flow is C as a program in advance.
The CPU is stored in the internal memory of the PU 12 and
It is executed under the control of 12. Further, this processing flow is started at regular intervals (every 0.1 seconds) in response to an internal interrupt of the CPU 12.

In the processing of step S31, the CPU 12
Detects whether or not the pen switch signal T1 is input,
It is determined whether or not 7 is in contact with the tablet 15 and is ready for handwritten character input. At this time, if it is confirmed that the pen 17 is not in contact with the tablet 15, the subsequent processing is not performed and the processing of step S31 is performed again.

When it is confirmed in the process of step S31 that the pen 17 is in contact with the tablet 15 and the handwritten character can be input, the processes of step S32 and thereafter are executed accordingly. In the process of step S32, the CPU 12 inputs the coordinate signal T2 and the current coordinates of the pen 17 on the tablet 15. This input coordinate is temporarily stored in a register inside the CPU 12.

In the next step S33, the CP
U12 determines whether or not the pen 17 is inputting handwritten characters on the tablet 15. Specifically, the CPU 12 determines whether or not the pen 17 is continuously in contact. At this time, if it is determined that the pen 17 is not continuously in contact with the pen 17, the process proceeds to step S31 again.

In the process of step S33, the pen 17
Is determined to be in the detection state continuously and the handwriting character is being input, the difference between the previous input coordinate value and the current input coordinate value is calculated in the processes of step S34 and step S35. Then, the obtained difference is divided by the aforementioned constant time (0.1 sec) to calculate the operation speed of the pen 17. The calculated speed is temporarily stored in the internal register of the CPU 12.

In the process of step S36, the CPU1
2 detects the pressing force by the operation of the pen 17 based on the applied pressure signal T3, and temporarily stores the detected pressure in the internal register.

In the next step 37, the CPU
12 performs processing so as to draw a line having a thickness and a darkness corresponding to the operation amount of the pen 17 between the previous coordinate and the current coordinate. Specifically, the CPU 12 performs an operation corresponding to the previous coordinate and the current coordinate based on the operation speed and the pressing force of the pen 17 calculated in steps S35 and S36 and temporarily stored in the internal register. Draw a line with the thickness. The thickness of the line is determined by accessing the table TB2 based on the detected pressing force and reading the corresponding dot. The line density is realized by the degree of dot thinning.

The thinning of dots is performed by adding dots if the speed of the pen 17 is slower than the previous speed, and thinning the dots to represent blurring when the speed is high, thereby realizing a change in darkness. The line having the thickness and the darkness thus determined is formed by filling the dots with the corresponding thickness of the line connecting the corresponding two points on the dot matrix of the memory 16 and the corresponding shade level. Image data of handwritten characters following the operation of the pen 17 is created. Since the created image data is sequentially displayed on the screen of the display device 13, the user operates the pen 17 while checking the handwritten characters displayed on the screen,
The degree of operation (speed and pressing force) can be changed as desired.

As described above, according to the processing flow of FIG. 10 above, when writing a character on a paper with a brush or the like, it is possible to realize a state in which the character is blurred by moving the brush quickly, and if the brush is strongly pressed. It is possible to realize a state in which characters are thick.

FIG. 11 is a processing flow chart for smoothly outputting handwritten characters while sequentially correcting the displacement of the operation amount of the pen according to an embodiment of the present invention.

FIGS. 12A to 12C are shown in FIG.
It is a figure for comparing the thickness of the output character after correction obtained by performing the processing flow of above with the thickness of the output character before correction.

The processing flow shown in FIG. 11 is stored as a program in the internal memory of the CPU 12 in advance and is executed under the control of the CPU 12.

Further, the processing flow program shown in FIG. 11 becomes ready for execution when data for requesting the sequential correction of the operation amount of the pen is given by an external input from the user.

In general, a line (called the first line) and a line (the second line)
When the processing is performed to connect the two lines), the difference in thickness and darkness from the first line is not noticeable if the distance between the two points that are the start and end points of the second line is narrow. .. Therefore, it is possible to connect the two lines by processing between the start point and the end point of the second line without worrying about the difference between the first line and the second line.

However, there is a considerable distance between the starting point and the ending point of the second line, and if the thickness of the line changes greatly from that of the first line only between these two points, it becomes Since the connection condition is extremely unnatural, in order to eliminate such unnaturalness, the thickness (or darkness) of the second line is continued from the thickness (or darkness) of the first line. If the correction processing is performed so that the two lines change, the connection between these two lines becomes smooth and becomes an extremely natural state. This correction will be described below.

Since processing time is required for this correction, whether or not to correct is arbitrarily determined based on the distance from the immediately preceding coordinate value and the difference in thickness (darkness) from the line drawn immediately before. It is also possible to select and make a key input from the input device 11 such as a keyboard to request the correction, or to pick the corresponding data displayed on the menu screen of the display device 13 to give the correction request. Requests for these corrections are prompt
It is given to the PU 12.

The CPU 12 uses the input device 1 as described above.
1 or when a correction request is given from the display device 13, the program of the processing flow shown in FIG. 11 is set to an executable state accordingly.

First, the CPU 12 starts execution of the processing from step S41 onward in response to an internal interrupt taken by the internal timer at regular time intervals (every 0.1 seconds).

In the processing of step S41, the CPU1
2 confirms whether the input coordinates given last time are stored in the internal register in advance. At this time, if the previous data has not been stored, this correction process is not performed and the process ends.

Returning to the processing of step S41, if the previous input coordinate data is stored in the register in advance, the processing of the next step S42 and thereafter is started to be executed accordingly.

In the processing of step S42, the current data is fetched in the internal register. That is, the coordinate signal T2 and the pressure signal T3 obtained by the operation of the pen 17 are input, and accordingly, the present input coordinate and the pressing force of the pen 17 are stored in the internal register.

Then, in the processing of the next step S43, the data obtained immediately before, that is, the input coordinates and the pressing force of the pen 17 obtained immediately before are fetched from the register in which they are stored in advance, and the processing of step S44. Move to.

In the process of step S44, the correction process is performed. That is, as described above, the pen 1
The operation speed of 7 and the pressing force are obtained.
Then, the above-mentioned tables TB1 and TB2 are accessed based on the obtained speed and pressing force to determine the thickness of the character. Also, the density of characters is determined according to the pressing force. Calculate the average of the thickness and darkness of this time obtained in this way and the thickness and darkness of the character obtained last time, and set this to the thickness and darkness of the character obtained this time. Then, the data obtained this time is corrected.

After that, the process proceeds to the next step S45, and the thickness and darkness of the line are gradually displaced so that the thickness and darkness of the current data (corrected data) can be obtained at the current coordinate position. With such an inclination, processing is performed so as to draw a line between the two points of the previous coordinate value and the current coordinate value. This is processed as image data on the dot matrix of the memory 16.

Changes in the character thickness obtained by the correction according to the processing flow of FIG. 11 as described above are shown in FIGS. 12 (a) to 12 (c).

In FIG. 12 (a), the vertical axis of the graph shows the thickness of the characters and the horizontal axis shows the value of the pressing force obtained with the operation of the pen 17. In FIG. 12A, a change in the thickness of the character according to the correction program of FIG. 11 is shown by a solid line, and a change in the thickness of the character when this correction is not performed is shown by a chain line.

As shown in the drawing, when the chain line is not corrected,
The thickness changes extremely in accordance with the change in the measured pressing force, but when the correction process indicated by the solid line is performed, the change in the thickness becomes smooth according to the pressing force obtained by the correction.

FIG. 12B shows a change in the line thickness when the correction process shown in FIG. 11 is not performed, and FIG. 12C shows the correction process shown in FIG. The change in line thickness when performed is shown.

In FIGS. 12B and 12C, as the coordinates change to 1, 2, 3 and 4 by the pen operation,
If the correction shown in FIG. 12 (b) is not performed, the thickness of the character changes stepwise and extremely for each detected coordinate value, so that when displayed on the display device 13 such as a CRT, it is very unsatisfactory. It becomes natural and unsightly.

On the other hand, when the correction process shown in FIG. 12C is performed, the data is processed so that the thickness of the character changes smoothly in accordance with the change in the coordinates, so that it is displayed on the CRT screen of the display device 13. In this case, the thickness of the displayed character changes very smoothly and becomes very easy to see.

In the embodiment described above, the tablet 1
The handwritten characters obtained by operating the pen 17 with 5 are processed so as to be displayed on the screen of a CRT or the like of the display device 13 in real time. The locus may be displayed as it is by driving the liquid crystal of the tablet 15, and the handwritten character may be displayed in real time on the liquid crystal matrix of the tablet 15.

Further, in the above-described embodiment, the thickness and the darkness of the character are variably set according to the operation amount (pressing force and speed) of the pen 17, but the initial value specified by the user is not variably set. It can also be maintained at a value.

In the above embodiment, the table TB1
Although TB2 and TB2 are provided to fix the degree of change in the thickness of the line, a function for variably setting the rate of change in the thickness of the line may be provided according to the user's desire.

[0095]

As described above, according to the present invention, the trajectory of the pen when the pen of the detecting means is externally operated and the main surface of the pen is traced by the pen, the operation amount of the pen (pressing force and speed). The thickness and darkness are determined based on, and the writing means stores the image data in the dot matrix based on the determined thickness and darkness, and sequentially,
Since it is output to the outside via the output means, it is possible to arbitrarily change the thickness and thickness of the output line according to the speed and pressure of the pen of the detection means and the step operation amount. There is an effect that it is possible to display a feeling of handwriting on the image by displaying blurring of characters and changes in thickness in real time.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a handwritten character processing device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a configuration of the tablet shown in FIG. 1 and a data input / output relationship between the tablet and a CPU.

FIG. 3 is a diagram showing an example of a display screen when an initial value of a pen operation amount on the tablet shown in FIG. 2 is set.

FIGS. 4A and 4B are graphs showing the relationship between speed and pressure during pen operation and line thickness of handwritten characters according to an embodiment of the present invention.

FIG. 5 is a diagram showing a table for determining a line thickness of a handwritten character based on a basic line thickness and a pen operation speed according to an embodiment of the present invention.

FIG. 6 is a diagram showing a table for determining a line thickness of a handwritten character based on a basic line thickness and a pen pressing force according to an embodiment of the present invention.

FIG. 7 is a process flow chart for inputting an initial value of a line thickness of a handwritten character and a pen operation amount according to an embodiment of the present invention.

FIG. 8 is a process flow chart for changing the line thickness of a handwritten character in accordance with a change in operation speed of a pen according to an embodiment of the present invention.

FIG. 9 is a processing flow chart for changing the line thickness of a handwritten character in accordance with a change in pen pressing force according to an embodiment of the present invention.

FIG. 10 is a diagram showing a line of handwritten characters in which the thickness of a handwritten character is changed in accordance with a change in operation speed of a pen according to an embodiment of the present invention and a line of a handwritten character is changed in accordance with a change in operation pressure of the pen. It is a processing flow chart for changing the darkness of.

FIG. 11 is a processing flow chart for smoothly outputting a handwritten character while sequentially correcting a displacement of a pen operation amount according to an embodiment of the present invention.

12A to 12C are diagrams for comparing the thickness of an output character after correction obtained by executing the processing flow of FIG. 11 with the thickness of an output character before correction.

FIG. 13 is a schematic configuration diagram of a conventional handwritten character processing device.

14 is a diagram showing a display example of an operation screen in the handwritten character processing device of FIG.

[Explanation of symbols]

 12 CPU 13 display device 15 tablet 16 memory 17 pen T1 pen switch signal T2 coordinate signal T3 pressure signal TB1 and TB2 table In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A pen including an externally operated pen for inputting a figure including a character by handwriting, the position of the contact and the pressing of the pen in response to contact of the tip of the pen with its main surface. Detecting means for detecting the pressure, storage means including a dot matrix of a size relatively equal to the main surface, and the contact position detected by the detecting means are input for every predetermined period, and the pen operation is performed accordingly. Speed calculating means for calculating a speed, thickness determining means for determining the thickness of the locus of the pen based on the operating speed calculated by the speed calculating means or the pressing force detected by the detecting means, The density determining means for determining the density of the trajectory based on the operation speed calculated by the speed calculating means, the contact position output by the detecting means, and the thick position determined by the thickness determining means. And data writing means for writing the locus into image data in the dot matrix based on at least one of the densities determined by the density determining means, and the image data written by the data writing means. An output device for sequentially reading and outputting from the dot matrix.