JP3338484B2 - Outline font transformation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deforming apparatus for making outline font data thicker or thinner.

[0002]

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

[0003]

However, in the above-mentioned conventional method, when the point for specifying the contour of the image is moved, the sum of the two normals is obtained. As shown in FIG. 13, there is a problem that the shape of the original figure (solid line) is broken (broken line). Also,
According to the above-described method, there is a problem that the moving amount 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 deforming apparatus for making outline font data thicker or thinner without losing the shape of a figure.

[0005]

According to a first aspect of the present invention, an outline font having a predetermined design size is provided in a deforming apparatus for making an outline font thicker or thinner by moving an outline point. Reading means, a means for specifying a line width to be corrected, and a line width correcting means for correcting the outline of the read outline font by the specified line width to change the thickness of the entire character. And a means for outputting the corrected outline font, wherein the line width correction means determines a direction determined depending on an angle formed with an x-axis of a line connecting the contour points. The feature is that the contour point is moved.

In the invention according to the second aspect, when the first line segment and the second line segment connecting the contour points are turned back at an acute angle, the line width correcting means sets the leading end point turned back at an acute angle to two. Heavy
And moves as the two line segments and the line segment connecting the two line segments .

According to a third aspect of the present invention, when the line width correcting means moves the curved portion, the line width correcting means determines whether the starting point and the ending point of the curve are to be determined.
Is determined depending on the angle between the line segment and the x axis
The method is characterized in that the moving direction is determined in the direction.

In the invention according to claim 4, the line width correction means corrects the contour after multiplying the coordinates of all the contour points by n times (n is an integer), and the output means is n times the design size. It is characterized by outputting an outline font.

According to the fifth aspect of the present invention, when the inner point of the outline is filled, the first outline is set to the starting point of the black area,
A first pixel processing system that determines the next contour line as the end point of the blackened region, and a second pixel line that determines the first contour line as the start point of the blackened region and the next contour line as the start point of the whitened region. when there is a pixel processing system, the line width correction means, first Pic
The outline font of the cell processing system is changed to the second pixel processing.
When converting to a science outline font, 0.5
The second pixel processing is performed after the pixel is fattened and processed.
System outline font to the first pixel processing system
0.5 pixels when converting to outline font
It is characterized in that it is processed after thinning each time.

[0010]

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 by moving the contour point in accordance with an angle formed with the x-axis of the line connecting the contour points or in the vertical direction of the line connecting the contour points. 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, thereby preventing the shape from being collapsed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One 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, wherein 1 is an outline font data storage unit, 2 is an outline font input unit, and 3 is a contour of an input outline font. A line width correction unit for changing the thickness of the entire character such as a stem, a diagonal line, and a curve, 4 is a parameter input unit for designating a correction amount, 5 is an outline font output unit for outputting deformed data, and 6 is a deformation unit. The storage unit 7 for the outline font data thus obtained is a control unit for controlling these units.

In the following description of the embodiments, it is assumed that the x-axis points to the right and the y-axis points upward. It is assumed that the right side of the contour line in the direction in which the contour line is traced is a blackened area.

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

FIG. 3 is a processing flowchart for performing hinting (thickening or thinning processing) on an outline, which is executed by the line width correction unit 3 in FIG.
That is, a point (c) to be processed, a point (p) before and a point (n) thereafter are given to all contour points (step 101) (steps 102 and 103), and a function Ne is obtained.
Calls wCoord and returns the coordinate m after processing
oved [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 a line segment from the immediately preceding point (p) to the point (c) to be processed.
shiftVector (p, c) and point to be processed (c)
A vector ShiftVector (c, n) for moving a line segment from to the next point (n) is obtained (step 201), and the start point and end point (in step 202, the start point is orig [p] and the end point is orig [c], in step 203, the starting point is orig [c] and the ending point is or
ig [n]) in the vector direction by the correction amount w specified from the parameter input unit 4 (step 20).
2, 203), the intersection of the two obtained lines, Intersec
is obtained and returned as a new coordinate NewCoord (step 204).

FIG. 5 shows the function S used in FIG.
It is a processing flowchart of a shiftVector. This calculates the difference between the x-coordinate and the y-coordinate between the two points. If the absolute value of the x-axis is larger, it is determined to be a gentle oblique line (steps 301 and 302). A judgment is made (steps 301 and 303).

If the x-coordinate (xs) of the starting point of the gentle oblique line is larger than that of the ending point (xe), it is known that the lower end of the black-painted area is formed, so 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 the x-axis forms the upper end of the blackened area, so the upward unit vector (0, 1) is returned (step 304). Similar processing is performed on the steep diagonal line in the y-axis direction.

Thus, the line width correction unit 3 can rotate the line in a direction determined depending on the angle between the line connecting the contour points and the x-axis.
Move the Guo point. That is, if the angle between the x-axis and the
Vertical contours as gentle diagonal lines (close to parallel lines)
Move the point, and if the angle with the x-axis is large, steep slope
The contour point is moved in the horizontal direction as a line (close to a vertical line) . FIG. 9 is a diagram illustrating a result of the contour point moving processing according to the present embodiment. In the above embodiment, the image is divided into four types with 45 degrees as a boundary. However, the present invention is not limited to this, and there are various methods such as dividing into eight.

Embodiment 2 FIG. 6 shows the function ShiftVe used in FIG. 4 described above.
10 is a processing flowchart of another embodiment of the CTOR. In this processing, first, a vector from the start point to the end point is obtained (step 401), and a unit vector (-y / N, x / N) obtained by rotating the vector by 90 degrees counterclockwise is returned (step 402). .

Thus, the line width correction unit 3 moves the contour points in the vertical direction of the line connecting the contour points. FIG.
FIG. 8 is a diagram illustrating a result of a contour point moving process according to the embodiment.

Embodiment 3 FIG. 7 is a processing flowchart of another embodiment of the function NewCoord described above. In this processing flowchart, steps 501, 502, 503, and 505
This is the same as steps 201 to 204 in the processing flowchart of the function NewCoord in FIG. In this embodiment, steps 504, 506, and 507 are newly added.

That is, 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 a processing result according to this embodiment.
In other words, since the contour line composed of points 2, 6, and 3 has a sharp tip point, the point 1, point 8, and point 4 are obtained by performing the above-described contour point movement processing. Thus, the outline becomes a partially broken line, and the change in the shape becomes extreme (the position of the point 8 becomes farther as the point 6 becomes sharper).

Therefore, in the present embodiment, point 5 is added at step 506 (point 5 is obtained by moving point 6, and point 7 is obtained by moving point 6. In step 507, StartNext is set to Point 7), and the contour of the dotted line portion is suppressed to prevent the shape from being broken. Note that, in this example, the tip point 6 is doubled and expanded vertically, but if the tip point 6 is moved to the right by a required width, the shape change can be further reduced.

Embodiment 4 FIG. 8 is a processing flowchart of another embodiment. In this embodiment, the point to be processed is set as a point not on the curve, and the same processing as described above is performed using a point not on the first curve before this point and a point not on the first curve after this point. The movement is performed for all points between the front and rear points. That is, at step 604, a point on the curve (FIG. 1)
Step 3) from step 605 to step 60
The start point of the curve is searched for at step 7 (p in step 606 becomes point 2 in FIG. 12). In steps 608 to 610, the end point of the curve is searched (n in step 609 is point 5 in FIG. 12). In steps 611 to 616, the start and end points of the curve (points 2 and 5 in FIG. 12) and the control points of the curve (FIG. 1)
2 points 3 and 4) by the method described in the first embodiment.
The moving direction is determined, and the result is applied to the contour points on the curve to perform the parallel movement processing.

FIG. 12 shows a processing result according to this embodiment. A line segment is formed by points 1 and 2, a line segment is formed by points 5 and 6, and a point 5 (start point of the curve) to a point 5 (end point of the curve)
Form a curve. Points 3 and 4 are control points of the curve.

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

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

<Embodiment 5> By the way, in a processing system that allows only integers as the coordinates of a contour point, when making a contour line thicker by two pixels, the whole line may be made thicker by one pixel. However, there is a problem when trying to make the outline one pixel thicker. That is, it is not possible to increase the overall thickness by 0.5 pixel. Therefore, in the line width correction unit 3 of the present embodiment, the coordinate values of all the contour points are doubled (the 256 × 256 pixel space is 512
.Times.512 pixel space), so that substantially the same effect can be obtained by enlarging the whole pixel by pixel. Of course, this enlargement amount must be used as a parameter during zooming.

<Embodiment 6> When filling an inner point of a contour line, a first encountered contour line is determined as a start point of a blackened region, and a second encountered line is determined as an end point of the blackened region. There are a pixel processing method and a second pixel processing method in which the first encountered contour is determined as the start point of the blackened area, and the second encountered contour is determined as the start point of the white painted area. The difference between these painting methods is
It 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 and processed, the line width becomes thin, and the uniformity of the line width cannot be guaranteed. . 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 increases the second pixel. The contour data is passed to the processing method. As a result, even when processing is performed by the second pixel processing method, an outline font having the same shape as the outline font designed for the first pixel processing method is obtained. Of course, conversely to the above, also in the case where the second pixel processing method is converted to the first pixel processing method, processing is performed after the outline is narrowed by 0.5 pixel by the line width correction unit. As a result, characters having the same shape can be obtained in both pixel processing methods.

[0031]

As described above, according to the present invention,
Then, the following effects can be obtained. (1) A means for reading an outline font, a means for designating a line width to be corrected, and a method for correcting the outline of the read outline font by a specified line width to obtain the thickness of the entire character. And a means for outputting a corrected outline font, so that the outline of the outline font can be made thicker or thinner by a predetermined amount.

(2) The angle between the x-axis of the line connecting the contour points
Since the outline point is moved in the direction determined depending on the outline font, the outline of the outline font can be made thicker or thinner with a small amount of calculation.

(3) Since the contour point is 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 throughout the character, and a high-quality character can be obtained. Can be configured.

(4) When the two line segments form an acute angle, the line segments are moved so that the tip point is not formed, so that it is possible to prevent the shape from being extremely changed.

(5) When moving the curved portion, the moving direction is determined using the line segment connecting the start point and the end point of the curved portion. It can be thicker or thinner.

(6) Since the contour is corrected after multiplying the coordinates of all the contour points by n times, deformation of one pixel unit or less is possible.

(7) The outline of the outline font designed for the first pixel processing system has the same design in the second pixel processing system, or is designed for the second pixel processing system. Since the outline is controlled so that the outline of the outline font has the same design in the first pixel processing system, a character having the same shape in the first pixel processing system and the second pixel processing system. Can be obtained.

[Brief description of the 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 performing hinting on 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 illustrating a result of a contour point moving process according to the embodiment;

FIG. 10 is a diagram showing a result of a contour point moving process according to another embodiment.

FIG. 11 is a diagram showing a processing result of another embodiment when a tip point is provided.

FIG. 12 is a diagram illustrating a result of performing a movement process on a curved portion;

FIG. 13 is a diagram illustrating the movement of a contour according to the related art.

[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 (5)

(57) [Claims] 1. A deforming apparatus for making an outline font thicker or thinner by moving an outline point, means for reading an outline font of a predetermined design size, means for specifying a line width to be corrected, and Line width correcting means for correcting the outline of the outline font by the designated line width amount to change the thickness of the entire character, and an outline font deforming device having means for outputting the corrected outline font. The outline font deforming device is characterized in that the line width correcting means moves the contour point in a direction determined depending on an angle between the line segment connecting the contour point and the x-axis. 2. The image processing apparatus according to claim 1, wherein the line width correction unit includes a first line connecting the outline points.
When the line segment and the second line segment turn at an acute angle , the acute angle
, The tip point to be folded is doubled, and the two line segments are
2. The outline font transformation device according to claim 1, wherein the outline font transformation device moves each of the segments as a line connecting them. 3. The line width correction unit according to claim 1, wherein, when moving the curved portion, an x-axis is set for a line segment including a start point and an end point of the curve.
2. The outline font transformation device according to claim 1 , wherein the moving direction is determined in a direction determined depending on an angle formed by the angle . 4. 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. 2. The outline font transformation device according to claim 1, wherein: 5. A first pixel processing system which, when filling an inner point of a contour line, determines a first contour line as a start point of a blackened region and a next contour line as an end point of the blackened region. When there is a second pixel processing system that determines the outline of the first pixel processing system as the start point of the blackened area and the next outline as the start point of the whitewashed area,
Fonts in the outline font of the second pixel processing system.
When converting to fonts, make
And a second pixel processing outline phone
To the first pixel processing outline font
When switching, it is necessary to reduce the size by 0.5 pixel before processing.
Outline font modification apparatus according to claim 1, wherein the that.