JPH04139496A - Line width control system for outline character - Google Patents

Abstract

PURPOSE:To obtain a beautiful output of good quality by performing a correspondence process for an upper and a lower vector regarding the same stroke of the outline character and setting line width at the time of enlargement or reduction to minimum line width determined by the font of the outline character and its output size. CONSTITUTION:When the outline character whose external contour and internal contour are different in generation direction is enlarged or reduced and outputted, minimum line length 1, maximum line width 2, and minimum line width 3 which are determined by the font of an outline vector are prepared as parameters for line width control and the minimum line width 3 is varied and prescribed corresponding to the output size of the outline character. Then the enlarge/reduced character is developed into vectors and one of a couple of vectors which constitute the same character line while the overlap between the vectors is longer than the minimum line length 1 determined by the font of the outline character and shorter than the minimum line width 3 is moved to equalize the line width. Consequently, when the outline character is enlarged or reduce and displayed, a beautiful character of good quality can be outputted.

Description

[Detailed Description of the Invention] [Summary] Enlarging/enlarging outline characters in a word processor
Regarding the line width control method when reducing and outputting outline characters, the purpose of outputting high-quality outline characters by making the line width uniform when enlarging/reducing outline characters and outputting them is to When enlarging/reducing and outputting an outline character whose creation direction differs between the inner contour and the inner contour, the minimum line length (■) and maximum line width (■) determined by the font of the outline vector are used as line width control parameters.

Prepare the minimum line width ■, and specify the minimum line width ■ by changing it according to the output size of the outline character, expand the enlarged/reduced characters into vectors, and create horizontal/vertical lines. Detect line vectors, extract pairs of vertical or horizontal vectors that make up the same character line, and determine if the overlap of the extracted vector pairs is greater than or equal to the minimum line length 0 determined by the font of the outline character. , and for a pair of vectors whose line width is less than or equal to the minimum line width ■, be sure to set the coordinates in the line width direction of one vector of the vector pair to the minimum line width ■ determined by the output size.
The configuration is such that the line width is determined by moving the line width so that the line width is determined.

[Industrial application field]

The present invention relates to a line width control method for enlarging/reducing outline characters and outputting them in a word processor.

In recent years, with advances in office automation (08), word processors have rapidly become popular.

At the same time, in order to create beautiful documents, you can enlarge/enlarge the characters.
There is an increasing demand for the use of outline characters that maintain their shape even when reduced.

However, when outputting, for example displaying, characters using the outline characters, it is not possible to enlarge the characters to an integral number of times or reduce them to several times the size of the original creation size. However, due to calculation errors in the coordinates during the enlargement/reduction, the line width may become larger or smaller by one dot, for example, and especially if the line width of the outline character is thin. This shift is noticeable and, for example, has the problem of degrading the quality of displayed characters, and there is a need for a line width control method that does not cause deterioration in display quality due to the enlargement/reduction.

[Prior art and problems to be solved by the invention] Fig. 3 is a diagram explaining the conventional line width control method for outline characters, (al) and (a2) show examples of outline character configurations, and ( b) shows a problem when outline characters are reduced.

First, if the outline character is, for example, shown in figure (al), then the vectors (1-2), (2-3), ·-, (12-) that constitute the outline character are
Corresponding to 1), as shown in figure (a2), the end point coordinates of the vector (Yl, Xi), (Y2.X2
), -, (Yl2.X12) columns are formed corresponding to each outline character and stored in the corresponding memory block.

Here, for example, the horizontal stroke (indicated by diagonal lines) of the outline character shown as an example in FIG.
For example, if the vector forming the Due to the reduction, the line widths become different and the line widths are uneven, causing the problem that the reduced characters cannot be seen as clean.

In view of the above-mentioned conventional drawbacks, the present invention provides a line width control method for outputting high-quality outline characters by making the line widths uniform when enlarging/reducing outline characters and outputting them in a word processor. The purpose is to provide this information.

[Means to solve the problem]

FIG. 1 is a diagram explaining the principle of the present invention.

The above problem can be solved by a line width control method for outline characters configured as follows.

This is a line width control method when enlarging/reducing and outputting outline characters whose creation directions differ depending on the outer and inner contours.The minimum line length determined by the font of the outline character is used as a line width control parameter. , a maximum line width ■, and a minimum line width ■, and specify the minimum line width ■ by changing it according to the output size. , extract the horizontal/vertical parts separately according to the above directions, and assuming that the horizontal/vertical line vector in one direction corresponds to the horizontal/vertical line vector in the other direction, calculate the coordinates of the corresponding vector. The difference in the width direction is less than or equal to the value of maximum line width × enlargement/reduction ratio with respect to the maximum line width ■ above,
The combination of vectors in which the horizontal/vertical overlap of corresponding horizontal line/vertical line vectors is greater than or equal to the value of minimum line length x expansion/reduction ratio with respect to the above minimum line length is The above horizontal line/vertical line vectors are associated with each other in the order of the smallest difference in the line width direction, and when this association is recognized, the difference in the line width direction is Minimum line width specified by output size ■ For items below, be sure to meet the minimum line width specified above ■
The line width of the enlarged/reduced outline character is determined by shifting the coordinates of one horizontal line/vertical line vector so that

[Function] The outer contour and the inner contour of the vector data constituting the outline character are constructed in different directions, such as clockwise for example, and counterclockwise for the inner contour. ing.

With this configuration, when one horizontal character line is viewed, the upper contour, for example, the outer contour, is to the right, and the lower contour, for example, the inner contour, is to the left.

In the line width control of the present invention, three types of parameters are prepared for the line width control: minimum line length (2), maximum line width (2), and minimum line width (2).

Taking the horizontal line stroke of the character shown in Figure 1 as an example,
The operation of the present invention will be explained below.

The horizontal line segments of the vector data constituting the outline character are divided into left directions d, e, and a, and right directions s, f,
g.

b and c, and consider the correspondence of the horizontal line segment (vector) in the left direction to the horizontal line segment (vector) in the right direction, and the deviation in the width direction of the coordinates, that is, the difference, is the outline The maximum line width determined by the font of the character ■ is less than or equal to the value of maximum line width x enlargement (reduction) rate, and both horizontal line segments (
A combination vector of line segments (vectors) whose horizontal overlap of vectors is equal to or greater than the minimum line length x enlargement (reduction) rate with respect to the minimum line length ■ determined by the font of the outline character. A horizontal line of the character shall be created.

This correspondence is performed in order from the smallest difference in the width direction.

In the example shown in FIG. 1, for example, for a horizontal line segment (vector) f in the right direction, there are d, e, and a, but the corresponding vector that satisfies the above conditions is the horizontal line segment (vector) d. I understand that. Similarly, the horizontal line segment vector)g
The horizontal line segment (vector) e corresponds to the horizontal line segment (vector) e, and the horizontal line segment (vector) a corresponds to the horizontal line segment (vector) b or C. Anything else is excluded from the vectors that make up the outline character.

In this way, for the extracted corresponding vector data pair, if the difference in the width direction (in this example, the Y direction) is less than or equal to the above minimum line width ■, the minimum line width will always be ■. Shift the coordinates of one horizontal line so that

In the above example, strokes in the horizontal direction have been described, but the strokes can be performed in the same way in the vertical direction as well.

The above minimum line width (■) can be changed and specified according to the output (display) size of the character corresponding to the enlargement/reduction ratio of the outline character, so that it can be enlarged/reduced arbitrarily. However, the line width can be controlled as described above.

Therefore, according to the present invention, when an outline character is enlarged/reduced and output (displayed), irregularities in line width caused by calculation errors in coordinates at the time of enlargement/reduction can be corrected by adjusting the respective output (display) sizes. This has the effect of making it possible to align the line width to the determined minimum line width (■), resulting in a high-quality, clear output (display).

〔Example〕

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

The above-mentioned FIG. 1 is a diagram explaining the principle of the present invention, and FIG. 2 is a diagram showing an embodiment of the present invention, in which (a> shows an example of the configuration of a character display system, and (b) shows an example of the operation flow (in the horizontal direction) in the line width control section.

In the present invention, in a word processor, for example, when an outline character whose outer outline and inner outline are created in different directions is enlarged/reduced and displayed in the output 5, the line width control parameter is determined by the font of the outline vector. Minimum line length■.

Prepare the maximum line width ■ and the minimum line width ■, and set the minimum line width ■
is defined by changing it according to the output size of the outline character, and the enlarged/reduced character is developed into a vector to detect horizontal line/vertical line vectors to form the same character line. A pair of vectors in the vertical or horizontal direction is extracted, and the overlap of the extracted vector pair has a minimum line length of 0 or more determined by the font of the outline character, and the line width of the vector pair is the minimum line width ■ For the following pair of vectors, move the coordinates in the line width direction of one vector of the pair so that the line width is the minimum line width determined by the output size, and make the line width the same. Means for achieving this are necessary means for carrying out the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

Hereinafter, with reference to FIG. 1 and FIG. 2, a line width control method for outline characters according to the present invention will be explained.

First, the coordinate conversion section 20 in the character display system shown in FIG. In section 21, the coordinates of the end points of each vector data constituting the outline character are multiplied by the enlargement/reduction ratio, and the coordinates to be output (displayed) are converted into integers and created.

With respect to these coordinates, the next line width control unit 22 performs a second
The line width control shown in the operation flow of FIG. 2(b) is performed.

First, for example, horizontal vectors d and e in the left direction.

a, and extract it in descending order of Y coordinate, that is, the horizontal vector e
, d, a. (Processing step 100.
101) Next, in the same way, rightward horizontal vectors h, f,
g, b, and c are extracted and sorted in ascending order of Y coordinate, that is, horizontal vectors h, f, g, b, and c. (See processing steps 102 and 103) Next, the extracted leftward horizontal vector.

Extract combinations in which the difference in Y coordinate with the horizontal vector in the right direction is less than or equal to the maximum line width (■) determined by the font of the main outline character.

At this time, the Y coordinate of the horizontal vector in the left direction is selected to be larger than the Y coordinate of the horizontal vector in the right direction. This selection is performed, for example, in descending order of Y coordinate. By selecting in this way, it is possible to exclude noise-like vectors other than the vectors forming the outline character.

The above process is a process of extracting the upper and lower vectors of the same stroke. (See processing step 104) For the above-mentioned extracted upper and lower vectors of the same stroke, for example, add the Y coordinate of the left horizontal vector, add the minimum line width ■ determined by the font of the outline character to the right horizontal vector. Adjust to match the line width.

By setting the minimum line width {circle around (2)} to a predetermined line width depending on the output (display) size of characters, the above procedure can be applied to both enlargement and reduction. (See processing step 105) In this way, the present invention focuses on the fact that the line width of a character is determined by the difference in the coordinates of the upper and lower vectors of the same stroke, and Once the upper and lower vectors have been associated, for example, the movement of the vectors on the lower/upper side of the stroke can be changed depending on the line width when expanding/reducing the font of the outline character and the font of the outline character. The feature is that it is performed so that the minimum line width is determined by the output (display) size.

〔Effect of the invention〕

As explained above in detail, the line width control method for outline characters of the present invention allows the line width As control parameters, the minimum line length (■), maximum line width (■), and minimum line width (■) determined by the font of the outline vector are prepared, and the minimum line width (■) is changed in accordance with the output size of the outline character. The enlarged/reduced characters are expanded into vectors, horizontal line/vertical line vectors are detected, and the upper and lower portions of the same character line are determined.

Alternatively, a pair of vectors in the left and right direction is extracted, and the overlap of the extracted pair of vectors is a minimum line length of 0 or more determined by the font of the outline character, and the line width of the vector pair is less than or equal to the minimum line width ■. For a vector, the coordinate in the line width direction of one vector of the pair of vectors must be
The line width is moved to the minimum line width determined by the output size above, and the line width remains the same. Therefore, due to the calculation error of the coordinates when the outline character is enlarged/reduced and displayed. Prevents uneven line widths,
This has the effect of being able to output (display) high-quality, clean characters.

[Brief explanation of drawings]

FIG. 1 is a diagram explaining the principle of the present invention. FIG. 2 is a diagram showing an embodiment of the present invention. FIG. 3 is a diagram illustrating a conventional line width control method for outline characters. It is. In the drawing, 1 to 12 are the end points of the outline character vector. 20 is a coordinate conversion section, and 21 is an enlargement/reduction section. 22 is a line width control section. 100 to 105 are processing steps. ■ is the minimum line length, ■ is the maximum line width. ■ is the minimum line width. a to h are vectors. are shown respectively. Figure Figure (Part 1) Figure (Part 2) Outline (b) Figure Figure (Part 2)

Claims (1)

[Scope of Claims] A line width control method when enlarging/reducing and outputting an outline character whose creation direction differs depending on the outer outline and inner outline, the method comprising: a font of the outline character as a line width control parameter The minimum line length ([1]) determined by and the maximum line width ([
2]) and a minimum line width ([3]), and specify the minimum line width ([3]) by changing it according to the output size, and configure the above outline characters. For each vector data, extract the horizontal/vertical parts separately according to the above directions, and assume that the horizontal/vertical line vector in one direction corresponds to the horizontal/vertical line vector in the other direction. The difference in the width direction of the coordinates of the corresponding vector is less than or equal to the value of maximum line width x enlargement/reduction ratio with respect to the maximum line width ([2]), and the difference in the width direction of the corresponding horizontal line/vertical line vector is
A combination of vectors whose vertical overlap is greater than or equal to the minimum line length x enlargement/reduction ratio with respect to the minimum line length ([1]) is the vector that constitutes the enlarged/reduced outline character. Then, the horizontal line/vertical line vectors are correlated in the order of the smallest difference in the line width direction, and when the correspondence is recognized, the difference in the line width direction is the minimum specified by the output size. For items with a line width ([3]) or less, shift the coordinates of one horizontal line/vertical line vector so that the line width ([3]) or less is always the above minimum line width ([3]), and then change the enlarged/reduced outline character. A line width control method for outline characters characterized by determining the line width.