JP2910101B2 - Vector font data component point correction device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration of vector font data for printing high-quality characters using an outline character pattern in a printing system such as Japanese desktop publishing. The present invention relates to a correction device.

2. Description of the Related Art In recent years, in a printing system, in order to realize high-quality character printing at low cost, a contour character pattern enlarging / reducing method capable of generating an arbitrary character with one character pattern has been frequently used.

However, simply expanding the coordinates of the outline character pattern
Simply reducing the size does not produce high-quality characters due to rounding such as rounding.

Conventionally, a line width control method for enlargement / reduction has been proposed to prevent this (Japanese Patent Application Laid-Open No. 62-63384).

 Hereinafter, a conventional line width control method will be described.

FIG. 4 is a block diagram of a conventional example. Reference numeral 13 denotes vector font data, and reference numeral 14 denotes a coordinate conversion unit for changing the coordinate value of the bending point of the vector font data 13.

Reference numeral 15 denotes a line attribute assigning unit that assigns attributes of vertical lines and horizontal lines. 16 is based on the line attribute information obtained by the line attribute assigning unit, the control amount of the upper line and the control amount of the lower line in the case of a horizontal line, and the control amount of the right line and the control amount of the left line in the case of a horizontal line. This is a control information creation unit that creates a control amount.

Reference numeral 17 denotes a bending point control unit that performs line width control based on the control information created by the line width control information creation unit 16.

18 is a dot / dot from the inflection point generated by the inflection point controller 17.
A font generation unit that generates a font.

However, in the above-described configuration of the related art, each line has a desired line width. However, since the correction process is performed without considering the line interval, the distance between the lines is changed by the scaling factor. Variations occur, and low-quality characters are generated. There was such a problem.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a line detecting unit for detecting vertical and horizontal lines of a character based on the constituent points of vector font data, Means for grouping those having a predetermined relationship among the vertical and horizontal lines, and a line-to-line value and a line width for each of the grouped lines based on the constituent points of the lines detected by the line detection unit. Means for calculating the values of the values and the entire width of the group, a coordinate transformation unit for scaling the constituent points of the vector font data at a predetermined magnification by coordinate transformation, and, for each grouped line, the distance between the lines before scaling. A configuration in which a correction amount is obtained based on each value obtained by scaling the value, the line width value, and the entire width value of the group, and the coordinate value of the component point after scaling by the coordinate conversion unit is corrected using the correction amount. The point correction unit and the component point correction unit And a font generation unit that generates a dot font from the coordinate values.

According to the present invention, when performing scaling of vector font data with the above-described configuration, those having a predetermined relationship are grouped, and for each grouped line, the line-to-line value and the line width value before scaling are performed. And a correction amount is obtained based on each value obtained by scaling the entire width value of the group, and the coordinate value of the constituent point after the scaling by the coordinate conversion unit is corrected using the correction amount. It is possible to generate characters with the same image balance as.

FIG. 1 is a block diagram showing a method of correcting a bending point of vector font data according to an embodiment of the present invention.

1 is an input unit for obtaining the type and size of a character to be output, or an output position, 2 is a vector font storage unit storing vector font data, and 3 is a unit based on information obtained from the input unit 1. Bending point correction unit that corrects the bending point,
Reference numeral 4 denotes a dot font generation unit that generates a dot font from the corrected inflection point data, 5 denotes an output unit that outputs the generated dot font to a CRT or a printer, and 6 denotes an execution unit that performs these controls. It is a processing unit.

The operation of the vector font bending point correction method configured as described above will be described with reference to the flowchart of FIG. 2 and the configuration diagram of FIG.

First, the vector data is fetched from the storage device 8 (S1), the vertical line and the horizontal line forming the character are detected by calculating the inclination of each line segment, and each line is numbered (S2). In the example of FIG. 5, the total number of lines is 5, and numbers from 1 to 5 are given.

Next, each of the vertical and horizontal lines detected in this manner is detected as to which other line is in contact (S3, S4). If there are three or more lines in contact, the line width plus the line-to-line control processing ( S6)
Otherwise, the normal line width control processing is performed (S
7). In the example, the line tangent to line 2 or line 4 is line 1
In this case, since there are three lines 3 and 5, in this case, the line 1, line 3, and line 5 are made into one group, and the line width plus the line-to-line processing is performed, and the lines 2 and 4 are subjected to normal processing. .

As the line width plus line interval control processing, first, the line width and line interval of each group and the width of the entire group are obtained in groups (the width of the entire group is (upper line of line 1) − (underline of line 3)). It can be obtained by calculation), and each value is multiplied by a scaling factor (S9 to S12).

Here, the conditions for generating high-quality characters are described in the order of priority: 1. The line width is uniform. 2. The overall balance is good. 3. The space between lines is appropriate.

In the real number calculation, the following relational expression holds even when multiplied by the scaling factor, but (line width × magnification ratio) + (line × magnification ratio) = (line width obtained from (bending point × magnification ratio)) + (Between lines obtained from (bending point x magnification)) Actually, rounding processing such as rounding is performed. <Line width x magnification> + <line x magnification> ≠ <<< bending point x magnification> In many cases, the following relationship is obtained: line width obtained from the equation> + <interval obtained from the bending point × magnification ratio> (where the value in parentheses is a real value, and the value in <> is an integer value). Do).

In the case of such a relational expression, since it is desired to hold the values of <line width × magnification> and <overall width × magnification>, the correction amount is added between the lines having lower priority.

α = <overall width × magnification> − <line width × magnification> − <interval × magnification >>> 間 の Number between lines The value of α is added between each line (S13). For the remainder, the following processing is performed.

As a characteristic of kanji, the wider the lower or right line is more stable and the character balance is better, so if the remainder is positive in the horizontal line group, +1 from the underline to the upper line
do. In the case of a negative value, -1 is subtracted from the upper line to the lower line. If the remainder is positive in the vertical line group, the remainder is incremented by 1 from the right line to the left line. In the case of a negative value, the remainder is decremented by -1 from the left line to the right line (S14).
~ S21).

The bending point corrected as described above is stored in the page memory 10.
The dot data is developed on the printer 11 and output to the printer 11 or CRT 12 (S8).

Advantageous Effects of the Invention The present invention provides a line detection unit that detects vertical and horizontal lines of a character based on the constituent points of vector font data, and a predetermined relationship between the vertical and horizontal lines detected by the line detection unit. Means for grouping those having a, and, based on the constituent points of the lines detected by the line detection unit, means for respectively determining the line-to-line value, line width value, and overall width value of the group for each grouped line A coordinate conversion unit for scaling the constituent points of the vector font data at a predetermined magnification by coordinate conversion, and for each of the grouped lines, an inter-line value, a line width value, and a total width value of the group before scaling. A correction amount is obtained based on each of the scaled values, and the correction amount is corrected by the component point correction unit that corrects the coordinate value of the component point after the scaling by the coordinate conversion unit using the correction amount. A font that generates a dot font from coordinate values And a font generation unit, when scaling the vector font data,
Those having a predetermined relationship are grouped, and for each grouped line, a correction amount is obtained based on each line value before and after scaling, the line width value and the overall width value of the group, respectively, Since the coordinate values of the constituent points after scaling by the coordinate conversion unit are corrected using the correction amount, characters having the same image balance as that of the original data can be generated, and a dot font can be obtained. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of processing in the embodiment, FIG. 2 is a flowchart of the embodiment, FIG. 3 is a block diagram of an apparatus used in the embodiment, FIG. 4 is a block diagram of processing in a conventional example, and FIG. Is an explanatory diagram for extracting correction information for the example character "day" of the bending point correction, and FIG. 6 is a diagram showing an example of variation between lines due to a magnification.

Claims (1)

(57) [Claims] 1. A line detector for detecting vertical and horizontal lines of a character based on the constituent points of vector font data, and a predetermined relationship among the vertical and horizontal lines detected by the line detector. Means for grouping the lines having, and means for obtaining a line-to-line value, a line width value, and an overall group width value for each of the grouped lines based on the constituent points of the lines detected by the line detection unit. A coordinate conversion unit that scales the constituent points of the vector font data at a predetermined magnification by coordinate conversion, and for each of the grouped lines, an inter-line value, a line width value, and the entire width of the group before scaling. A component correction unit that obtains a correction amount based on each value obtained by scaling the value, and uses the correction amount to correct the coordinate value of the component point after scaling by the coordinate conversion unit; and Dot from the coordinate value And font generator for generating a Onto configuration point correction apparatus of the vector font data, characterized in that it comprises a.