JPH06138865A - Outline font deforming device - Google Patents

Abstract

PURPOSE:To make the outline of an outline font thick or thin by a specific quantity by correcting the outline of the outline font by the specified line width quantity and varying the thickness of the whole character, and outputting the character. CONSTITUTION:The outline font deforming device is equipped with an outline font data storage part 1, an input part 2 for the outline font, a line width correction part 3 which corrects the outline of the outline font and varies the thickness of the whole character such as a stem, a slanting line, and a curved line, a parameter input part 4 for specifying the correction quantity, an outline font output part 5 which outputs the deformed data, a storage part 6 for the deformed outline font data, and a control part 7. Then the line width correction part 3 moves the outline of the inputted outline font by the specified correction quantity to vary the thickness of the whole character. The correction is performed by moving the outline points at right angles to the segments connecting the outline points.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformation device for thickening or thinning outline font data.

[0002]

2. Description of the Related Art As a method for thickening or thinning an image, for example, there is an image processing method described in JP-A-63-245572. In this method, a point that specifies the contour of an image is moved to make it thicker or thinner.

[0003]

However, in the above-mentioned conventional method, when the point that specifies the contour of the image is moved, the sum of the two normals is obtained, so that a deviation occurs in the moving direction. As shown in FIG. 13, there is a problem that the shape of the original figure (solid line) becomes a broken figure (broken line). Also,
According to the method described above, there is a problem that the amount of movement of the contour line differs for each line segment and it is difficult to control the shape of the entire figure.

An object of the present invention is to propose a transforming device for thickening or thinning outline font data without breaking the shape of a graphic.

[0005]

In order to achieve the above object, according to the invention of claim 1, an outline font having a predetermined design size is used in a deforming device for thickening or thinning an outline font by moving contour points. And a means for designating a line width amount to be corrected, and a line width correcting means for correcting the outline of the read outline font by the specified line width amount to change the thickness of the entire character. And a means for outputting the corrected outline font.

According to a second aspect of the present invention, the line width correcting means moves the contour point according to an angle formed by the x-axis of a line segment connecting the contour points.

According to a third aspect of the present invention, the line width correcting means moves the contour points in a vertical direction of a line segment connecting the contour points.

According to a fourth aspect of the present invention, the line width correcting means prevents the tip point from being formed when the first line segment and the second line segment connecting the contour points are folded back at an acute angle. 1
It is characterized in that the line segment and the second line segment are moved.

According to a fifth aspect of the present invention, the line width correcting means determines the moving direction by using a line segment connecting a start point and an end point of the curve when the curve portion is moved. .

According to a sixth aspect of the present invention, the line width correction means corrects the contour line after multiplying the coordinates of all contour points by n times (n is an integer), and the output means is n times the design size. It is characterized by outputting the outline font of.

According to the seventh aspect of the invention, when filling the inner points of the contour line, the first contour line is defined as the start point of the black-painted area,
The first pixel processing system that determines the next contour line as the end point of the black-painted area, and the second contour line that determines the first contour line as the start point of the black-painted area and the next contour line as the start point of the white-painted area. When there is a pixel processing system of the above, the line width correcting means makes the outline of the outline font designed for the first pixel processing system have the same design in the second pixel processing system. Alternatively, the outline line is controlled so that the outline line of the outline font designed for the second pixel processing system has the same design in the first pixel processing system.

[0012]

The line width correction unit changes the thickness of the entire character by moving the outline of the input outline font by the specified correction amount. The correction is performed according to the angle formed by the x-axis of the line segment connecting the contour points, or by moving the contour point in the vertical direction of the line segment connecting the contour points. Further, in the case of a contour line having a sharp tip point, the line segment is moved so that the tip point is not formed and the shape is prevented from collapsing.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. <Embodiment 1> FIG. 1 is a block diagram of an embodiment of the present invention, in which 1 is an outline font data storage unit, 2 is an outline font input unit, and 3 is a contour line of an input outline font. By the stem,
Line width correction unit that changes the thickness of the entire character such as diagonal lines and curves, 4
Is a parameter input unit for designating the correction amount, 5 is an outline font output unit for outputting the transformed data,
6 is a storage area for the transformed outline font data,
A control unit 7 controls each of these units.

In the following description of the embodiments, it is assumed that the x-axis is facing right and the y-axis is facing upward. Further, the right side of the contour line in the direction of tracing the contour line is a black-painted area.

FIG. 2 shows a contour point table used in the line width correction unit 3 of this embodiment. That is, a set of contour point numbers and their coordinate data (orig) is stored. These are obtained from the outline font input unit 2. Further, it is assumed that these coordinate data are divided into respective contour lines. Further, the moved coordinates in the table store new coordinates of the moved contour point as described later.

FIG. 3 is a processing flowchart for performing hinting (thickening or thinning processing) on the contour line, which is executed by the line width correction unit 3 in FIG.
That is, for all contour points (step 101), the point (c) to be processed, the point (p) before that, and the point (n) after that are given (steps 102 and 103), and the function Ne
Coordinates m after processing that is a return value after calling wCoord
The overd [c] is recorded at the corresponding position in FIG. 2 (step 104). Thereafter, p, c, and n are sequentially increased (step 105) and the process is repeated.

FIG. 4 is a processing flowchart of the function NewCoord. That is, the vector S for moving the line segment from the immediately preceding point (p) to the processing target point (c)
shiftVector (p, c) and point to be processed (c)
To a point (n) immediately after the shift vector (Shift201 (c, n)) and a vector ShiftVector (c, n) are calculated (step 201), and the start point and the end point (in step 202, the start point is orig [p], the end point is orig [c], in step 203, the start point is orig [c] and the end point is or
ig [n]) is moved in the vector direction by the correction amount w designated by the parameter input unit 4 (step 20).
2, 203), the intersection point of the obtained two straight lines Intersec
and the new coordinate NewCoord is returned (step 204).

FIG. 5 shows the function S used in FIG. 4 described above.
It is a processing flowchart of shiftVector. This calculates the difference between the x-coordinate and the y-coordinate between the two points, and if the absolute value is larger on the x-axis, it is judged to be a gentle diagonal line (steps 301 and 302), and if not, it is a steep diagonal line. It is determined (steps 301 and 303).

If the x-coordinate (xs) of the start point of the gentle diagonal line is larger than that (xe) of the end point, it can be seen that it forms the lower end of the black-painted area, and therefore the downward unit vector (0, -1) is returned. (Step 305). If the x-coordinate (xe) of the end point is larger than that (xs) of the start point, it is known that it forms the upper end of the black-painted area, and therefore an upward unit vector (0, 1) is returned (step 304). Similar processing is performed in the y-axis direction even for steep diagonal lines.

As a result, the line width correction unit 3 moves the contour points according to the angle of the line segment connecting the contour points with the x-axis. FIG. 9 is a diagram showing a result of the movement processing of the contour points according to the present embodiment. In the above-mentioned embodiment, 45 degrees are used as boundaries to divide into four types, but the present invention is not limited to this, and there are various methods such as eight divisions.

<Second Embodiment> FIG. 6 is a processing flowchart of another embodiment of the function ShiftVector used in FIG. 4 described above. In this process, first, a vector from the start point to the end point is obtained (step 401), and a unit vector (-y / N,
x / N) is returned (step 402).

As a result, the line width correction unit 3 moves the contour points in the vertical direction of the line segment connecting the contour points. Figure 10
[Fig. 6A] is a diagram showing a result of movement processing of contour points according to the present embodiment.

<Third Embodiment> FIG. 7 shows the function New described above.
It is a processing flowchart of another Example of Coord.
In this processing flowchart, steps 501 and 5
02, 503, and 505 are the functions NewCoord of FIG.
201 to 20 in the processing flowchart of
It is the same as 4. In this example, step 50
4, 506 and 507 are newly added.

That is, in this embodiment, when the point to be processed is a sharp tip point (step 504), a new point is added (step 506) to avoid an extreme change in shape. FIG. 11 shows the processing result according to this embodiment.
That is, the contour line consisting of the points 2, 6, and 3 has a sharp tip point, so that the contour point movement processing as described above results in the points 1, 8, and 4. Becomes a contour line indicated by a broken line, and the change in shape becomes extreme (the sharper point 6 is, the farther the position of point 8 is).

Therefore, in this embodiment, point 5 is added in step 506 (point 5 is obtained by moving point 6, and point 7 is obtained by moving point 6. In step 507, StartNext is It becomes a point 7), and the outline of the dotted line portion is suppressed to prevent the shape from collapsing. In this example, the tip point 6 is doubled and the tip point 6 is widened up and down. However, if the tip point 6 is moved to the right by the required width, the change in shape can be further reduced.

<Fourth Embodiment> FIG. 8 is a processing flowchart of another embodiment. In this example, the point to be processed is a point that is not on a curve, and using a point that is not on the first curve before this and a point that is not on the first curve after this,
The same processing as described above is performed, and the movement is performed for all the points sandwiched by the points before and after. That is, a point on the curve (point 3 in FIG. 12) is found in step 604, and a starting point of the curve is searched for in steps 605 to 607 (p in step 606 becomes point 2 in FIG. 12). Step 60
From 8 to step 610, find the end point of the curve (step 6
The n of 09 is point 5 in FIG. From step 611 to step 616, the start and end points of the curve (point 2 in FIG. 12,
5) and the control points of the curve (points 3 and 4 in FIG. 12) are translated.

FIG. 12 shows the processing result according to this embodiment. Point 1 and point 2 form a line segment, point 5 and point 6 form a line segment, and point 2 (start point of curve) to point 5 (end point of curve)
The curve is composed of. Further, points 3 and 4 are control points of the curve.

For the line segments of points 1 and 2, the line segments of points 2 and 5, and the line segments of points 5 and 6, the same processing as described above is performed. That is, the line segments of points 1 and 2 are thickened in the vertical direction, and the line segments of points 2 and 5 are moved to the right,
Similarly, the line segments of points 5 and 6 are thickened in the vertical direction. Then, the result shown in FIG. 12 is obtained by moving the line segment connecting the points 3 and 4 to the right by the same amount as the rightward movement amount of the line segment connecting the points 2 and 5.

It should be noted that, here, the two points between the start point and the end point
The Bezier curve composed of the control points (points 3 and 4) has been shown as an example, but the same applies to the spline curve and the like.

<Embodiment 5> In a processing system that allows only integers as the coordinates of contour points, if the contour line is made thicker by 2 pixels, the whole may be made thicker by 1 pixel. However, there is a problem when trying to make the contour line thicker by 1 pixel. That is, the entire pixel cannot be thickened by 0.5 pixel. Therefore, the line width correction unit 3 of the present embodiment doubles the coordinate values of all contour points (256 × 2).
By making the 56-pixel space 512 × 512-pixel space), and by thickening the whole pixel by one pixel, substantially the same effect can be obtained. Of course, this amount of enlargement must be used as a parameter during zooming.

<Embodiment 6> When the inner points of the contour line are filled, it is determined that the first contour line encountered is the start point of the black-painted area and the next contour line is the end point of the black-painted area. There are a pixel processing method and a second pixel processing method in which the contour line first encountered is determined as the start point of the black-painted area and the contour line encountered next is determined as the start point of the white-painted area. The difference in the filling method arises from the difference in the definition of what a pixel is.

Therefore, when the outline of the outline font designed for the first pixel processing method is passed to the second pixel processing method for processing, the line width becomes thin and the line widths are not guaranteed to be the same. . Therefore, in the present embodiment, the line width correction unit 3 thickens all the outlines of the outline font designed for the first pixel processing method by 0.5 pixels as a whole, and then the second pixel Contour data is passed to the processing method. As a result, even if the processing is performed by the second pixel processing method, a font having the same shape as the outline font designed for the first pixel processing method can be obtained. Of course, contrary to the above, in the case of converting the second pixel processing method into the first pixel processing method, the contour shape is controlled by the line width correction unit so that the same shape is obtained in both pixel processing methods. The character is obtained.

[0033]

As described above, according to the first aspect of the present invention, the outline font transforming device is provided with a means for reading the outline font, a means for specifying the line width amount to be corrected, and the read outline font. Since it is composed of line width correction means that corrects the contour line of the specified amount of line width and changes the thickness of the entire character, and means that outputs the corrected outline font, the outline font outline line It is possible to make it thicker or thinner by a predetermined amount.

According to the second aspect of the invention, since the contour points are moved according to the angle formed by the x-axis of the line segment connecting the contour points, the contour font of the outline font can be thickened or thinned with a small amount of calculation. You can

According to the third aspect of the invention, since the contour points are moved in the vertical direction of the line segment connecting the contour points,
The amount of change in the width of the contour line can be kept constant over the entire character, and high-quality characters can be constructed.

According to the fourth aspect of the present invention, when the two line segments form an acute angle, the line segments are moved so that the end points are not formed. Therefore, it is possible to prevent the shape from changing extremely. You can

According to the fifth aspect of the invention, when the curved portion is moved, the moving direction is determined by using the line segment connecting the start point and the end point of the curved portion. Can be held to make the contour line thicker or thinner.

According to the sixth aspect of the invention, the contour line is corrected after the coordinates of all the contour points are multiplied by n.
It is possible to change the pixel unit or less.

According to the seventh aspect of the present invention, the outline of the outline font designed for the first pixel processing system has the same design in the second pixel processing system, or The outline of the outline font designed for the pixel processing system has the same design in the first pixel processing system.
Since the contour line is controlled, the characters having the same shape can be obtained in the first pixel processing system and the second pixel processing system.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a contour point table used in a line width correction unit.

FIG. 3 is a processing flowchart for hinting a contour line.

FIG. 4 is a processing flowchart of a function NewCoord.

FIG. 5 is a processing flowchart of a function ShiftVector.

FIG. 6 is a processing flowchart of another embodiment of the function ShiftVector.

FIG. 7 is a processing flowchart of another embodiment of the function NewCoord.

FIG. 8 is a processing flowchart of another embodiment.

FIG. 9 is a diagram showing a result of movement processing of contour points according to the present embodiment.

FIG. 10 is a diagram showing a result of movement processing of contour points according to another embodiment.

FIG. 11 is a diagram showing a processing result of another embodiment in the case of having a tip point.

FIG. 12 is a diagram showing a result of moving processing of a curved portion.

FIG. 13 is a diagram illustrating movement of a contour according to a conventional technique.

[Explanation of symbols]

 1, 6 Outline font data storage unit 2 Outline font input unit 3 Line width correction unit 4 Parameter input unit 5 Outline font output unit 7 Control unit

Claims (7)

[Claims] 1. A transforming device for thickening or thinning an outline font by moving contour points, a means for reading an outline font having a predetermined design size, a means for designating a line width amount to be corrected, and the reading means. And a line width correcting means for correcting the outline of the outline font by the specified line width amount to change the thickness of the entire character, and a means for outputting the corrected outline font. Outline font transforming device. 2. The outline font transforming apparatus according to claim 1, wherein the line width correcting means moves the contour points according to an angle formed by the x-axis of a line segment connecting the contour points. 3. The outline font transformation device according to claim 1, wherein the line width correction means moves the contour point in a vertical direction of a line segment connecting the contour points. 4. The line width correcting means is a first connecting the contour points.
2. The outline according to claim 1, wherein the first line segment and the second line segment are moved so that a tip point is not formed when the line segment and the second line segment are turned back at an acute angle. Font transformation device. 5. The outline according to claim 1, wherein the line width correcting means determines the moving direction by using a line segment connecting a start point and an end point of the curve when the curve portion is moved. Font transformation device. 6. The line width correcting means corrects the outline after multiplying the coordinates of all the outline points by n times (n is an integer), and the output means outputs an outline font of n times the design size. The outline font transforming device according to claim 1, wherein 7. A first pixel processing system for determining a first contour line as a start point of a black-painted area and a next contour line as an end point of a black-painted area when filling the inner points of the contour line, and When there is a second pixel processing system that determines that the contour line of the above is the start point of the black-painted area and the next contour line is the start point of the white-painted area, the line width correction means So that the contour line of the outline font designed for the second pixel processing system has the same design, or the contour line of the outline font designed for the second pixel processing system has the same design. 2. The outline font transformation device according to claim 1, wherein the outline is controlled so that the pixel processing system has the same design.