JPH06266492A - Method and device for handwriting input - Google Patents

Abstract

PURPOSE:To generate an illustration like the illustration drawn with a writing brush by the input work simulated to the use of the brush by obtaining the movement speed of the tip of an operating implement having a form of a writ ing tool and moving it while changing the size of the brush point picture pattern in accordance with the movement speed and generating the input character illustration by its locus. CONSTITUTION:Coordinates of the position of the pen tip are detected in steps ST2 and ST7, and the movement speed is obtained according to coordinate information in steps ST4 and ST8, and the pen tip is moved while changing the brush point picture pattern depending on the movement speed, and the illustration is generated by its locus. In the generated illustration, the line width is changed depending on the movement speed of the pen tip so that the line is thicker for quick movement of the pen tip and is thinner for the slow movement of the pen point. Further, blur peculiar to brush-written characters may be added in accordance with the movement speed of the pen tip by the display control simultaneously with the control of the size of the point picture pattern. Thus, the illustration nearer a brush-written picture is generated by the work similar to the use of the brush.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pen PC and a pen WP, and more particularly to an input method and apparatus for performing an input operation of an illustration image by using an operation tool having a writing instrument shape. Regarding the illustration creation function.

[0002]

2. Description of the Related Art Conventionally, there is an input method using a pen-type operation tool such as a light pen and a magnetic pen. In this, the position coordinates of the tip of the operating tool on the display screen are detected, and various inputs can be made to the computer based on the coordinate information. An example of this type of device is an input display integrated type, in which a transparent tablet is superimposed on the LCD, and
There is a well-known type in which the coordinates on the screen and the coordinate points on the transparent tablet are made to correspond to each other, and the operator can input by touching the pen tip on the designated area according to the display on the LCD.

Such an input device is convenient, for example, for transmitting an illustration such as a figure or handwritten character already drawn on the paper to a computer. That is, in the former case, a paper on which a graphic to be input is drawn is placed on a tablet, and a pattern on the paper surface is traced with a pen, so that a complicated pattern such as a map can be input with high accuracy. In addition, handwritten character illustrations have the advantage that they can be operated in the same manner as normal handwriting on paper.

[0004]

However, the above-mentioned conventional handwriting input method has a limit in the ability to express handwritten characters. In other words, for hard-brushed characters such as ballpoint pens and pencils, those written on paper with those writing tools and L
It is possible to express it realistically so that the difference from what is displayed on the CD is not felt so much, but in the case of writing with a writing brush, in particular, it is not possible to respond to a large change in the line width that is the characteristic of a writing brush, The illustration couldn't really look like a brush.

Therefore, in the case of a brushstroke character, it is necessary to prepare in advance what is actually written with a brushstroke, and to trace the outer edge of the character with a pen, which is a work different from the actual brushstroke. Absent.

The present invention has been made in view of the above circumstances. An object of the present invention is to provide a handwriting input method and a handwriting input method that can create an illustration closer to a writing brush by an inputting operation closer to a writing brush. To provide a device.

[0007]

A handwriting input method according to the present invention comprises a step of detecting a position coordinate of a tip of an operating tool of a writing instrument on a display screen, and a moving speed of the tip of the operating tool based on the position coordinate. With respect to the step of obtaining and the point image pattern imitating the point handwriting with a brush, the size is adjusted according to the moving speed and moved according to the movement route of the position coordinates, and the movement locus is displayed and controlled as a handwriting illustration. And a step.

The handwriting input device of the present invention is an image storage means for expanding display target image information, a display means for displaying the display target image information, an operating tool in the form of a writing instrument, and the display of the operating tool tip. Coordinate detection means for detecting the position coordinates on the screen in the means, moving speed calculation means for obtaining the moving speed of the operation tool tip based on the position coordinates,
The size of the point image pattern imitating the point handwriting with a brush is adjusted according to the moving speed, and moved according to the movement path of the position coordinates, and the movement locus is developed as the handwriting illustration in the image storage means. And display control means for displaying on the display means.

[0009]

According to the present invention, the moving speed of the tip (that is, equivalent to the pen tip) of the operating tool of a writing instrument such as an input pen is obtained, and the size of the brush stroke image pattern is changed according to the moving speed. Since the input character illustration is created from the trajectory, the line becomes thicker as you move the operation tool slowly in the finished illustration, and the line becomes thinner in the opposite way, the line width becomes wider according to the moving speed of the operation tool tip. It has been changed.

Here, when writing a powerful thick line with a writing brush, the writing brush is carried slowly, and when writing a supple thin line, the writing brush is carried quickly. However, according to the input method of the present invention, it is similar to the writing brush drawing. It will be possible to create an illustration similar to a calligraphy drawing by work.

In addition, in the display control, a function of inserting a blur in a brush character may be added at the same time as controlling the size of the stippled pattern in accordance with the moving speed of the tip of the operating tool. By doing so, it is possible to achieve an illustration expression that is even closer to a brush.

Further, a pressure sensor may be provided at the tip of the operating tool, and the writing pressure information from the pressure sensor may be taken into consideration in controlling the size of the stippled pattern and the blurring of the line.

Next, it is conceivable to divide the input control consisting of the detection of the position coordinates of the tip of the operating tool, the calculation of the moving speed, and the display control for each stage of writing the character, writing the character, and ending the writing.

In the step of writing out characters, the degree of change in the size of the dot pattern with respect to the unit moving distance is changed according to the moving speed at that time until the dot pattern reaches the size corresponding to the moving speed of the tip of the operating tool. And draw the trajectory. Therefore, the lower the calculated moving speed, the larger the change in the size of the stippled pattern for the moving distance, so a thick line is drawn from the writing, and the higher the moving speed, the larger the size of the stippled pattern for the moving distance. Because the change is small,
You can start drawing with thin lines.

In the next intermediate stage, the size of the dot image pattern is simply changed according to the moving speed of the tip of the operating tool,
For example, when moving in the stages of slow → fast → slow, a pattern of thick → fine → thick is drawn.

At the final stage, the dot pattern is gradually reduced according to the degree of change in size with respect to the unit moving distance according to the final moving speed of the operating tool tip, and the dot pattern size is "0". The path is virtually drawn until it becomes ". As a result, for example, when writing is finished with the pen tip being moved while accelerating, the writing is curvilinear and gradually becomes thin, and the end is sharpened.

An illustration like a writing brush is drawn by repeating the continuous drawing of lines by the above-described three-step control.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

First, FIG. 2 shows a system configuration of an input device according to an embodiment of the present invention.

In this figure, 4 is a main controller and 6 is a main memory.
Plays a role of a CPU that controls the entire system, and the main memory 6 stores various control programs including an illustration creating function to be executed by the main controller 4 and illustration data.

3 is an input pen, 1 is a tablet, 2 is an LC
D and 7 are tablet controllers. The input pen 3 has an ON / OFF switch and a pressure sensor at its pen tip portion, the output of the ON / OFF switch becomes information indicating whether or not the pen tip is in contact with the tablet 1, and the output of the pressure sensor is a brush. It becomes pressure information. Tablet 1 and LCD
2, the tablet 1 is on top and the LCD 2 is on the bottom so that the both 1 and 2 are superposed, and the LCD 2 allocates areas for various pen input operations such as menu selection and character input on the tablet 1, and The message required for the operation is displayed. The tablet 1 detects the coordinates of the position where the pen tip of the input pen 3 contacts, and outputs the coordinate information. Information from the input pen 3 and the tablet 1 is supplied to the tablet controller 7. The tablet controller 7 forms an interface from the input pen 3 and the tablet 1 to the main controller 4, and outputs the pressure sensor of the input pen 3 and the coordinate information from the tablet 1 when the switch of the main input pen 3 is ON. , And ON / OFF information of these switches,
The pressure information and the coordinate information are given to the main controller 4.

The main controller 4 forms a handwritten illustration image based on the information given from the tablet controller 7. Reference numeral 5 is a VRAM in which the dot pattern of the image displayed on the LCD 2 is stored, and the handwritten illustration image formed by the main controller 4 is the VR.
It will be developed in a predetermined area in the AM5.

FIG. 1 shows the processing contents of the main controller 4 which realizes the writing style illustration creating function which is the main part of the present invention.

The function shown in this figure is realized by three large stepwise controls. That is, the three controls are
Control from when the switch of the input pen 3 changes from OFF to ON until when the drawing pattern becomes a size according to speed or when the switch of the input pen 3 changes from ON to OFF (hereinafter, referred to as the first Control processing from the time when the drawing pattern becomes a size corresponding to the speed to the time when the switch of the input pen 3 changes from ON to OFF (hereinafter referred to as the second control processing), This is a control (hereinafter, referred to as a third control process) for completing the drawing of the illustration after the switch of the pen 3 is changed from ON to OFF.

The first control process is steps ST1 to ST6.
It is activated when the pen tip switch changes from OFF to ON. In step ST1, the two-dimensional size of a pointillistic pattern imitating a point handwriting which is formed by dyeing the brush tip of an actual brush and simply placing it on the paper without carrying it is set to the minimum unit "0", that is, the point. Set as. Next, in step ST2, the pen tip coordinates are read. At this time, the data is read at least twice at regular intervals. Next, step ST3
After confirming whether or not the pen tip switch has been turned off, the process proceeds to step ST4. In this step ST4, the moving distance is calculated from the coordinates read in step ST2, and the moving speed of the pen tip is obtained from the distance and the coordinate reading time interval. Then, in step ST5, the size of the above-mentioned stippled pattern is gradually changed at a degree corresponding to the determined pen movement speed, and the locus thereof is drawn. Then, in step ST6, it is determined whether or not the drawing pattern in step ST5 has reached a size corresponding to the pen tip moving speed at that time. If the determination is NO, the process returns to step ST2. Therefore, at the beginning of drawing, steps ST2 to ST6 are repeated until the stippled pattern reaches a size corresponding to the moving speed of the pen tip.

By the first control process, the following calligraphic illustration is drawn.

For example, if the pen tip is pressed against the same point on the tablet 1 for a long time, two or more readings in step ST2 are the same, so the calculated value of speed in step ST4 is "0". become. Therefore, in step ST5, the stippled pattern p is not moved and pa1 → pa2 → pa3.
As described above, the area is simply increased (see FIG. 3A).

Further, when the pen tip is moved on the tablet 1, two or more coordinate values in step ST2 are different, and therefore the velocity value corresponding to the moving distance is determined in step ST4.
In step ST5, the degree of change in the size of the stippled pattern p with respect to the unit movement distance is changed according to the speed, and the locus is drawn. Therefore, the lower the calculated moving speed is, the larger the change in the size of the dot pattern p is relative to the moving distance, such as pb1 and pb2. Therefore, a thick line is drawn from the beginning of drawing (see FIG. 3B). .). Therefore, when writing with a thick line like in the case of most kanji, the tip of the brush is placed on the paper for a long time, and it corresponds to an actual writing brush that starts to move slowly. On the other hand, the higher the moving speed, the more pc1
Since the change in the size of the stippled pattern is small for the movement distance like pc3, you can start drawing with thin lines (Fig. 3
See (C). ). Therefore, when writing with a thin line like in the case of a kana writing brush, it matches the feeling of an actual writing brush that the writing tip slides on the paper surface.

Next, when the determination in step ST6 is YES, the process proceeds to the second control process. This second control process is composed of steps ST7 to ST10. Step ST7 performs the same processing as step ST2, step ST8 performs step ST4, and step ST9 performs the same processing as step ST3. Then, in step ST10, the locus is displayed in a pattern having a size corresponding to the moving speed of the pen tip.
The second control process is continued as long as the determination in step ST9 is YES, that is, the pen tip switch is ON.

Here, for example, when the pen tip is moved in the steps of slow → fast → slow, a thick (pd1) → thin (pd2) → thick (pd3) pattern is drawn (FIG. 3 (D)). reference).

If the determination in step ST3 of the first control process or step ST9 of the second control process is NO, the process moves to the third control process. The third control process includes step ST11. In step ST11, the stippling pattern is gradually reduced according to the degree of change in size with respect to the unit moving distance corresponding to the final pen tip moving speed when the pen tip switch is ON, and the size of the stippling pattern p is increased. Draw the locus until the value becomes "0".
The moving direction at that time is virtually determined based on the moving direction of the pen tip at the end when the pen tip switch is ON, or slightly before the pen tip switch.

Therefore, when the pen tip switch is turned off while moving the pen tip while accelerating, this third control process causes a curvilinear and gradual transition such as pe1 → pe2 → pe3 → pe4. An illustration such as a so-called "Harai" is drawn, which is thin and ends with a sharp point (Fig. 3 (E)).

It is possible to draw an illustration like a brush by repeating the continuous drawing of the lines by the above first to third control processes.

Here, in the first to third control processes, the output of the pressure sensor may be used as writing pressure information, and this may be used for controlling the size of the dot pattern or the blurring of lines. That is, the stronger the writing pressure indicated by the pressure sensor output, the larger the dot pattern (in other words, the thicker the line). In addition, the location and degree of blurring are changed according to the strength of the writing pressure.

[0035]

As described above, according to the present invention, the moving speed of the tip of the operating tool for a writing instrument such as an input pen is determined, and the brush strokes are moved while changing the size of the writing stippling pattern according to the moving speed. Since the input character illustration is created from the trajectory, the line becomes thicker as you move the operation tool slowly, and the line becomes thinner in the opposite way the line becomes thinner according to the moving speed of the operation tool tip. The effect is that you can create an illustration close to a brush calligraphy by a work similar to the brush calligraphy that makes it easier to carry the brush slowly when writing strong thick lines and to carry the brush faster when writing thin flexible lines. Play.

[Brief description of drawings]

FIG. 1 is a flowchart showing the control contents of a handwriting input method according to an embodiment of the present invention.

2 is a block diagram showing a hardware configuration for realizing the input control shown in FIG. 1. FIG.

FIG. 3 is an explanatory diagram showing an example of an illustration created by the control shown in FIG. 1.

[Explanation of symbols]

 1 tablet 2 LCD 3 input pen 4 main controller 5 VRAM 6 main memory 7 tablet controller p dot pattern ST2, ST7 coordinate detection step ST4, ST8 moving speed calculation step ST5, ST11 display control step

Claims (3)

[Claims] 1. A step of detecting a position coordinate on a display screen of a tip of an operating tool of a writing instrument shape, a step of obtaining a moving speed of the tip of the operating tool based on the position coordinate, and a point image simulating a handwriting by a writing brush. A handwriting input method, comprising: moving the pattern according to the moving path of the position coordinates while adjusting the size thereof according to the moving speed, and controlling the display of the moving locus as a handwriting illustration. 2. An image storage unit in which display target image information is expanded, a display unit for displaying the display target image information, a writing instrument form operation instrument, and a position of the tip of the operation instrument on the screen of the display unit. A coordinate detecting means for detecting coordinates, a moving speed calculating means for obtaining a moving speed of the operation tool tip based on the position coordinates, and a dot image pattern imitating a handwriting with a writing brush are set to have a size according to the moving speed. A handwriting input device comprising: a display control unit that adjusts and develops the movement locus as a handwriting illustration in the image storage unit according to the movement path of the position coordinates and displays the handwriting illustration on the screen of the display unit. 3. The display control means has a function of adjusting the rate of change in the size of the dot pattern with respect to the moving distance in accordance with the moving speed at the time of writing and ending of writing by the operating tool. The handwriting input device described in 2.