JPH0671945A - Outline font expanding system - Google Patents

Abstract

PURPOSE:To equalize widths of segments constituting a character reduced in conversion by performing coordinate transformation for the reduced character after an origin of coordinate system is moved based on origin information set for each character. CONSTITUTION:After an origin of coordinate of pattern of former character data is moved to a coordinate point of a coordinate value (0, 29) almost at the center of a lower segment 11 and an upper segment 12, reducing processing is performed. As a result, a lower segment 21 passes coordinate points of coordinate values (41, -4), (41, -2), (8, -2) with start point at a coordinate point of a coordinate value (8, -4) and returns to the coordinate point of the coordinate value (8, -4). In the same manner, an upper segment 22 passes coordinate points of coordinate values (41, 3), (41, 5), (8, 5) with start point at a coordinate value (8, 3) and returns to the coordinate point of the coordinate value (8, 3). As for width of each segment at this time, both a lower segment 31 and an upper segment 32 become 2 in coordinate value and the widths of the upper and lower segments become equal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outline font expansion system for expanding characters for printing with an outline font when printing characters on a printer.

[0002]

2. Description of the Related Art When a character is printed by a printer, a conventional outline font expansion method for expanding the character for printing with an outline font is such that the origin of each character when expanding is independent of the character type. , All have the same origin.

For this reason, when the reduced printing is performed from the original data, the numbers after the decimal point of the conversion calculation in the coordinate conversion process are rounded off.
When compared with the original character pattern, the value may be shifted in a non-proportional manner, and the thickness of each line segment forming the character may be uneven.

[0004]

As described above, in the conventional outline font expansion method, the origin of each character when expanding is set to the same origin regardless of the type of the character, and thus the size is reduced. When printing characters,
The thickness of each line segment that makes up a character becomes uneven, for example,
In the case of characters composed of parallel line segments such as "=", it is particularly noticeable that the thicknesses of the two line segments are different, and the quality of the printed characters is poor and the characters are difficult to read. ing.

[0005]

According to the outline font expansion method of the present invention, the optimum origin information for expanding the outline font is set for each character, and the coordinate conversion for reducing printing is performed. This involves moving the origin of the coordinate system based on the origin information set for each character and then performing coordinate conversion processing for the reduced character.

That is, the outline font expansion method of the present invention sets origin information at the center of the plurality of parallel line segments for a character including a plurality of parallel line segments in the line segments of the constituent elements, When a character including a line segment is reduced and expanded into an outline font, the reduction process is performed after moving the origin of the coordinate system to the point where the origin information is set.

[0007]

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

FIG. 1 is a pattern diagram showing a character pattern in which an outline font has been developed. (A) is a pattern diagram of character data of the original size, and (b) is the embodiment. FIG. 3C is a pattern diagram of character data in which the origin is shifted and reduced to 3/4, and FIG. 7C is a pattern diagram of character data in which the origin is reduced to 3/4 without shifting the origin.

The character shown in FIG. 1 is the character "=". As shown in FIG. 1A, in the original character data pattern, the lower line segment 11 has a coordinate point of coordinate values (10, 24) as a starting point, and the contour of the line segment in a counterclockwise direction. As drawn, the coordinate value (54, 24), the coordinate value (54, 26), the coordinate value (10, 26) is passed through, and the coordinate value (10,
It returns to the coordinate point of 24). Similarly, the upper line segment 12
Takes the coordinate point of the coordinate value (10,33) as the starting point, and sets the coordinate value (54,33) -coordinate value (54,35) -coordinate value (1
0, 35), and returns to the coordinate point of coordinate value (10, 33). A character is generated by filling the inside surrounded by these contours.

The widths of the lower line segment 11 and the upper line segment 12 at this time are both 2 in terms of coordinate values.

When reducing this character to three quarters, the coordinate value of each coordinate point in FIG. 1 (a) is set to three quarters without shifting the origin, and the value after rounding off the decimal point is a new coordinate point. As shown in FIG. 1C, the lower line segment 31 uses the coordinate point of the coordinate value (8, 18) as a starting point, and the coordinate value (41, 18) 41, 20) and the coordinate point of the coordinate value (8, 20), and returns to the coordinate point of the coordinate value (8, 18). Similarly, the upper line segment 32 uses the coordinate point of the coordinate value (8, 25) as the starting point and the coordinate value (41, 2).
5) -Coordinate value (41, 26) -Coordinate value (8, 26) It passes through each coordinate point and returns to the coordinate point of coordinate value (8, 25).

The width of each line segment at this time is as follows:
Has a coordinate value of 2, but the upper line segment 32 has a coordinate value of 1, which means that the upper and lower line segments have different widths. This is because when the coordinate value of each coordinate point is multiplied by 3/4 for reduction,
It is generated by rounding off to the nearest whole number.

In this embodiment, paying attention to the fact that the character "=" is vertically symmetrical, the line segment 11 below the origin of the coordinates of the original character data pattern (FIG. 1A) is used. After moving to a coordinate point having a coordinate value (0, 29) substantially in the center between the line segment 12 and the upper line segment 12, the above-described reduction processing is performed.

As a result, as shown in FIG. 1B, the line segment 21 on the lower side starts from the coordinate point having the coordinate value (8, -4) and has the coordinate value (41, -4). Value (41, -2)
The coordinate value (8, -2) passes through each coordinate point, and the coordinate value (8,-)
Return to the coordinate point of 4). Similarly, the upper line segment 22 uses the coordinate point of the coordinate value (8, 3) as a starting point and the coordinate value (41,
3) -Coordinate value (41,5) -Coordinate value (8,5) It passes through each coordinate point and returns to the coordinate point of coordinate value (8,3).

The width of each line segment at this time is as follows:
Both the upper line segment 32 and the upper line segment 32 have a coordinate value of 2, and the upper and lower line segments have the same width.

As described above, when a character pattern including a plurality of parallel line segments in the line segments of the constituent elements is reduced, the center of the parallel line segments is moved to the origin and then the reduction process is performed. This makes it possible to equalize the widths of parallel line segments.

[0017]

As described above, according to the outline font expanding method of the present invention, the optimum origin information for expanding the outline font is set for each character,
When performing coordinate conversion to perform reduced printing, move the origin of the coordinate system based on the origin information set for each character and then perform coordinate conversion processing for reduced characters to reduce the reduced converted characters. There is an effect that the widths of the constituent line segments can be made equal, and therefore, it is possible to print reduced characters with excellent quality.

[Brief description of drawings]

FIG. 1 is a pattern diagram showing a character pattern in which an outline font has been expanded, (a) is a pattern diagram of character data of the original size, and (b) is a diagram in which the present embodiment is applied to shift the origin. The pattern diagram of the character data reduced to three quarters, (c) is the same as the conventional method.
It is a pattern diagram of the character data reduced to 3/3.

[Explanation of symbols]

 11, 12, 21, 22, 31, 32 line segments

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 1/393 4226-5C

Claims (2)

[Claims] 1. The optimum origin information when performing expansion processing for an outline font is set for each character, and when performing coordinate conversion for reducing printing, coordinates are set based on the origin information set for each character. An outline font expansion method characterized by including performing coordinate conversion processing for reduced characters after moving the origin of the system. 2. With respect to a character including a plurality of parallel line segments in a line segment of a component, origin information is set at the center of the plurality of parallel line segments, and the character including the parallel line segment is reduced. An outline font expansion method comprising: when performing expansion processing on an outline font, moving the origin of the coordinate system to the point where the origin information is set and then performing reduction processing.