JPH0230558A - Character pattern generation method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method of generating a character pattern, and in particular, a character pattern generation method suitable for generating a shaded white character pattern from the outline of a character pattern. .

[Conventional technology]

Generally, the method of generating a shaded white character pattern from the outline of a character pattern is to shift the outline to the outside of the character pattern (to the side that is not filled) by one width of the outline of the shaded white character pattern. Examples include things to draw (Figure 3).

[Problem to be solved by the invention]

The conventional technique described above has a problem in that when the width of the shadow or the width of the outline of the generated white character pattern with shadow is thick, the number of times one outline is drawn increases, resulting in a slow processing speed.

SUMMARY OF THE INVENTION An object of the present invention is to quickly generate shaded white characters with arbitrary shadow widths and outline widths.

[Means to solve the problem]

The above purpose is to detect the angle between each contour line of the character pattern and the scanning line in the range from 0 degrees to 90 degrees, and if the angle is 0 degrees or more and 45 degrees or more, it is drawn using the conventional method described above. , if the angle is greater than or equal to 45 degrees and less than 90 degrees, the width of the outline of the shaded white character pattern or the width and shadow of the outline is moved outside the character pattern (the side that is not filled) based on the intersection calculated from the outline and the scanning line. This is achieved by drawing a straight line with a length plus the width of .

[Effect]

The angle between the outline of the character pattern and the scanning line is 0 degrees or more 4
If it is less than 5 degrees, the contour line is shifted perpendicularly to the scan line, whereas if it is 45 degrees or more and 90 degrees or less, the contour line is shifted horizontally to the scan line. In the latter case, instead of shifting the drawing, the width of the outline of the shaded white character pattern or the width of the outline and the shadow is drawn outside the character pattern based on the intersection point calculated from the outline of the character pattern and the scanning line. The processing time can be shortened by drawing a straight line with a length equal to the width of .

〔Example〕

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

FIG. 1 shows a block diagram of the principle of the present invention.

The outline data 11 of the character pattern is sent to an intersection calculation means 12 that calculates the intersection between the outline and the scanning line, and an angle detection means 14 that detects the angle between the outline and the scanning line in the range of 0 degrees to 90 degrees. is input. The intersection point calculated by the intersection point calculation means 12 is inputted to the horizontal direction outline drawing means 13 after finding the intersection point of the outline of one character. The horizontal outline drawing means 13 draws intersection points in ascending order for each scanning direction, and for odd-numbered intersections, draws a straight line equal to the width of the outline horizontal to the scanning direction on the left side of the intersection. At the intersection of the gates, a straight line with a length equal to the width of the outline horizontal to the scanning direction plus the width of the shadow is drawn on the right side of the intersection.

On the other hand, for the contour line determined by the angle detection means 14 to be 0 degrees or more and less than 45 degrees, the position detection means 15 detects the position of the contour line in the character pattern, and determines whether it is above or below the character pattern. Determine. Angle detection means 1
5, the contour line determined to be between 45 degrees and 90 degrees is input to the position detection means 15 and the vertical contour drawing means 1 (not input to the vertical contour drawing means 16.
If the position detecting means 15 determines that the contour line is on the second side, the input contour line is drawn upwardly, and if it is determined as the bottom side, it is drawn downwardly by one width of the contour line.

After processing the outline for one character, the outline drawn by the horizontal outline drawing means 13 and the vertical outline drawing means 16 are combined by the outline combining means 17 to generate a shaded white character pattern 18. let The character patterns generated above are shown in FIG.

According to this embodiment, the angle formed with the scanning line is 45 degrees or more and 9
Processing of contour lines of 0 degrees or less can be drawn in parallel to the scanning line in the width of the contour line, which has the effect of shortening processing time.

〔Effect of the invention〕

According to the present invention, a shaded white character pattern can be generated at high speed even when the width of the shadow and the width of the outline are increased.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a flowchart of a character pattern generated by the present invention, and FIG. 3 is a diagram of the generation of an outline character pattern by a conventional method. 11. Character pattern outline data, 12. Intersection point calculation means, 13. Horizontal outline drawing means, ] 4. Angle detection means, 15. Position detection means, 16. Vertical outline drawing means, 17. Outline synthesis means, 18...Shaded white character pattern.

Claims (1)

[Claims] 1. means for calculating the intersection of the outline of the character pattern and the scanning line; means for drawing the outline of the character pattern based on the intersection; means for detecting the angle formed by the outline and the scanning line; , comprising means for detecting the position of the outline in the character pattern, and means for drawing an outline of the character pattern based on the outline, and generating a shaded white character pattern from the outline of the character pattern. A character pattern generation method characterized by comprising: