JPH0679324B2 - Brush typeface generation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a writing style generating method for converting a line character or drawing written with a pen into a writing style.

(B) Conventional Technology In recent years, word processors capable of printing with a writing brush have been realized, and documents with writing with a writing brush have become popular.

In such a brush writing process, only the font used for printing is selected and used as the font at the time of printing, and the brush written by the handwriting of the user of this word processor is used. I couldn't get the character.

On the other hand, a calligraphy simulation software (Nikkei PC 19)
(Details on pages 290 to 291 of January 12, 1987) have been developed to enable writing with a brush close to the handwriting of the writer himself.

(C) Problems to be Solved by the Invention However, in the calligraphy simulation as described above,
Regardless of the direction of the drawing stroke, the arrangement direction of the brush tip shape character as the touch of the brush is fixed, so it is not possible to reproduce the actual movement of the brush that the brush tip changes according to the traveling direction of the brush, which is optimal I couldn't get a nice writing brush.

(D) Means for Solving the Problems The writing brush type generating method of the present invention detects a sample value string of a drawing stroke written by an input pen on a coordinate reading device and a moving direction of the drawing stroke to detect a brush-shaped character. Is continuously arranged for each sample value of the drawing stroke so that the head direction of the character coincides with the moving direction of the drawing stroke, and a handwriting image like a writing brush is synthesized.

(E) Operation According to the writing brush type generation method of the present invention, the moving direction of the drawing stroke is detected in real time from the writing locus of the input pen, and based on this, the respective directions of the brush-shaped characters that are array-drawn are automatically determined. To be decided.

(F) Example In general, Japanese characters centering on kanji (“book” shown in FIG. 2) can be written by strokes in eight directions such as vertical, horizontal, and diagonal. When writing hiragana or figures other than kanji, it is preferable to correspond to strokes in 16 directions as indicated by numbers "0" to "15" in FIG.

On the other hand, the brush tip shape (S) of the writing brush is streamlined as shown in FIG. 4 (b), and as shown in FIG. 4 (a), the writing brush (Q)
The head portion (H) of the character coincides with the advancing direction of the stroke and the tail portion (T) of the character is opposite. That is, when the brush tip shape (S) of FIG. 5 is arranged, the brush always moves in the head (H) direction of the character (S), that is, in the direction of arrow A, and the character string (S ') (S') of the brush tip shape is moved. ′) ...
That is, the handwriting as shown in FIG. 4 is left, and for example, there is no case where the character string (S ″) (S ″) ...

Therefore, in order to obtain the handwriting of the writing brush, it is only necessary to arrange the character of the writing tip shape (S) as shown in FIG. 5 so that the head (H) direction always coincides with the traveling direction.

FIG. 1 shows the structure of a writing-script writing mechanism for realizing such a writing-writing type generation method, and the method of the present invention will be described in detail with reference to FIG.

In FIG. 1, (1) is a coordinate reading device such as a tablet or an electronic blackboard. When a character is written on the reading surface with an input pen, the position of this pen is shown at regular time intervals (for example, 0.01 sec). The coordinates are sampled and output. The reading method of the device (1) includes an electromagnetic induction method and a pressure sensitive method, but is not particularly limited. (2)
Is a movement distance detector that calculates the amount of movement of the pen from the sample string of coordinate values output from the coordinate reading device (1), and moves over a predetermined distance (for example, about 1/5 of the line width of the writing brush). The sample at the time of detection is selected as a new sample value, and the moving direction detector (3) is instructed to detect the direction. The moving direction detector (3) detects the moving direction of the input pen with respect to a new sample value at the timing indicated by the moving distance detector (2). (4) is both detectors (2),
Based on both the sampled value sequence of drawing strokes represented by the position coordinates sent from each of (3) and the moving direction information at each sampled value, a specific brush tip shape directed to a specific position at a specific position This is a pattern generator that determines the pattern of the character, and reads this pattern from the pattern data memory (5) and displays it in an array on a display device such as a CRT or LCD.

Next, the operation will be described in detail.

(I) In the coordinate reading device (1), as shown in FIG. 6, the coordinate value detected at a constant time (0.01 sec) is calculated as (x1,
It is output to the movement distance detector (2) in real time as point sequence data of y1) ,,, (xw, yw).

(Ii) The moving distance detector (2) always calculates the moving distance based on the position data sent from the coordinate reading device at fixed time intervals (0.01 sec). As shown in FIG. 7, the origin [O (x ₀ , y ₀ )] of the moving distance measurement is the position of the pattern displayed immediately before. The point E in the circular area having the radius (r) centered on this origin is not the moved point. When a point F having a distance of r or more appears, it is assumed that the pen has moved, and the coordinate value (xf, yf) is output to the direction detector (3). Here, the distance R is determined as follows.

Then, the threshold r of the moving distance is determined as follows according to the size of the basic shape of the display pattern.

That is, when writing with a small brush tip, the threshold value r
Also make it smaller.

Further, as shown in FIG. 8, the position when the pen is first lowered onto the writing surface is very unstable. Therefore, the following stabilizing rule is provided without detecting the moving distance as described above.

The coordinate value is represented by (x, y), and the average value of the first n points obtained from the coordinate reading device (1) is taken as N (X, Y).

After that, the next m point is ignored, the direction is calculated between the coordinates of the n + m + 1th point, and the display position of the pattern at this time is
It is the (n + m + 1) th point, and this point is the arrangement position S ₁ of the first display pattern (in this FIG. 8, n = 5 and m = 5).

(Iii) The moving direction detector (3) detects the direction according to the instruction from the moving distance detector (2). The coordinates of the origin are the above-mentioned (N, Y) as the first point, and hereinafter, the point used for the direction calculation is the coordinate. The direction from the point O to the point F in FIG. 7 is set as the movement direction, and the movement is applied in a predetermined direction (16 directions in the figure) as shown in FIG. In this case, it is clear that the more the moving direction is detected, the smoother the handwriting can be obtained at the time of displaying, but the handwriting when moving with the pen on the writing surface of the coordinate reading device has a small change in direction. Since it occurs, it is more convenient to limit the detection to about 16 directions in order to absorb blurring in the traveling direction.

(Iv) In the pattern generator (4), the pattern of the brush tip shape character having the direction component given by the movement direction detector (3) is provided at the position given by the movement distance detector (2) as a pattern data memory ( It is calculated based on the pattern data of 5) and output to the display unit.

To display the handwriting, the writing tip pattern (S) is displayed in conjunction with the movement of the pen, as shown in FIG. In FIG. 9 (a), a handwriting is generated by superimposing and combining the writing point patterns, and in FIG. 9 (b), the entire range in which the writing point pattern (S) is connected by a circumscribed line is combined as a writing. . In any case, since the pen can be displayed in real time according to the movement of the pen, it is possible to draw a desired character or figure while watching the displayed handwriting. FIG. 10 is an example of the drawn character “Yo” obtained by the method of the present invention based on the synthesizing method shown in FIG. 9 (a).

(G) Effect of the Invention According to the brush typeface generation method of the present invention, at each sample point of the drawing stroke from the writing locus of the input pen, the brush tip-shaped characters are automatically arranged in the direction according to the respective moving direction. Since it is possible, it is possible to generate a faithful writing brush typeface according to the movement of the actual writing brush tip. Therefore, according to the method of the present invention, it is possible to create a soft typeface and handwriting with a writing brush using a pen (hard brush). The method is simple and requires almost no font data. You can write in a bold and free typeface as compared to brush letters using ready-made fonts.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus for realizing the method for generating a writing brush type of the present invention, FIG. 2, FIG. 3, and FIG. 4 (a) (b).
Is a schematic diagram showing the characteristics of a writing brush, FIG. 5 is FIG. 6, FIG. 7, FIG. 8, FIG. 9, and FIG. 10 are for explaining the operation of the apparatus configuration for realizing the method of the present invention. FIG. (1) ... coordinate reading device, (2) ... moving distance detector, (3) ... moving direction detector, (4) ... pattern generator, (5) ... pattern data memory, (6) ...... Display device.

Claims (1)

[Claims] 1. A sequence of sample values of drawing strokes written with an input pen on a coordinate reading device and a moving direction of the drawing strokes are detected, and a brush-shaped character is moved in the moving direction of the drawing strokes for each sample value of the drawing strokes. With respect to the character, the writing head generating method is characterized by arranging them continuously so that the head directions of the characters are the same, and synthesizing a handwriting image in a writing style.