KR101719336B1 - Font transforming method using meta data and system thereof - Google Patents

Abstract

The present invention is a technique to similarly transform a first font and a second font which are mutually different fonts using metadata. A font is similarly modified to eliminate inconsistency caused by a difference between a font used in a document created in a conventional digital device or a web page and a font existing in a device to open a document.

Description

 TECHNICAL FIELD [0001] The present invention relates to a font transformation method and system using metadata,

The present invention relates to a method and system for transforming fonts using metadata.

The present invention particularly relates to a technique for similarly modifying a first font and a second font, which are mutually different fonts, and is a technique of converting a font used in a document created in a conventional digital device or a web page, And more particularly to a method and system for similarly modifying fonts to eliminate inconsistencies that arise as they differ.

Typically, a character is displayed on a screen in a digital device such as a personal PC, a smart phone, or a tablet PC, or an outline font (font) is used in printing.

However, since these fonts are held by the device itself, the appearance of the fonts becomes unusual when they are imported from devices that do not have fonts corresponding to digital documents or web pages.

Most devices today use alternate fonts to specify a specific font or to show a similar font instead.

Korean Patent Laid-Open Publication No. 10-2007-0037769 discloses a font modification for solving such a problem.

The disclosed technique extracts feature points of an input character, selects a transformation method for the input character, transforms the feature points of the vector font by applying the selected transformation method, An image is generated and displayed sequentially. This technique transforms an arbitrary character shape through a feature point transformation and rendering process based on a vector font (Vector Font).

Another prior art is Korean Patent Publication No. 10-1997-0071229.

This publication discloses a method for obtaining a center point of a given point and obtaining contact points using a maximum inscribed circle centered on the center point and its center axis axis and for obtaining information about the points on the center point and the contact points, It is a technique of transforming a font font through an application process.

Korean Patent Publication No. 10-2007-0037769 Korean Patent Publication No. 10-1997-0071229

It is an object of the present invention to provide a method and system for transforming a font in which a font of a document viewing apparatus for opening a document can be transformed similarly to a font used in a document created in a digital device or a web page, .

Other objects of the present invention will be apparent from the following detailed description.

 According to another aspect of the present invention, there is provided a method of transforming a font using metadata, the method comprising: a first step of selecting a first font to modify an outline of a first font based on meta data of a second font; A second step in which the deformation size of the selected first font is determined based on the metadata of the second font; A third step of transforming the deformation size of the determined first font by applying the deformation size of the first font to the same ratio for each character; And a fourth step of adjusting the thickness of each character according to the width of the first font in which the deformation size is determined.

The first font is an original font, and the second font is a target font.

Metadata includes Em Square, the number of reference squares in which the font is designed; Font Unit, a unit system for storing the font size on Em Square; Base line, which is the baseline of character output; X-height, which is the height of the lowercase x from the base line; An ascender which is a reference line formed on a predetermined height from an upper limit line of an x-height indicating a reference height of a character; A descender which is a base line formed below a predetermined height from a lower limit line of x-height indicating a reference height of a character; an ascender line that is the sum of the x-height and the ascender based on the base line; a descender line that is the sum of the x-height and the descender based on the base line; Italic Angle, the angle of rotation when applying Italic style; Bold Factor to control the thickness of the text in the horizontal direction; And a Bold Factor which is an argument for adjusting the thickness of the character in the vertical direction.

and x-height is provided as a reference height of a normal character.

The transformation element of the first font is characterized by the width, height, and thickness of characters.

The deformation size of the character width is determined by comparing Glyph Width, which is the character-specific meta data of the first font and the second font, in Font Unit units.

The thickness adjustment of the first font is characterized by adjusting the thickness in the horizontal direction and the thickness in the vertical direction by using the vertical Bold Factor and the metadata of the second font.

According to another aspect of the present invention, there is provided a method of transforming a font using metadata, the method comprising: a first step of selecting a first font to modify an outline of a first font based on meta data of a second font; A second step in which the deformation size of the selected first font is determined based on the metadata of the second font; A third step of transforming the deformation size of the determined first font by applying the deformation size of the first font to the same ratio for each character; A fourth step of adjusting the thickness of each character according to the width of the first font in which the deformation size is determined; And a fifth step of controlling the horizontal and vertical magnification of the first font for the actual output.

In the case of the vertical magnification, the height of the character is based on x-Height which is metadata.

In the case of the vertical scale, the character height is characterized by using the sum of the ascender line and the descender line of each font as a factor of the scale factor.

According to an aspect of the present invention, there is provided a system for transforming fonts using metadata, the system comprising: a CPU for controlling deformation of a font; A font storage unit for storing font data and meta data so that the font is transformed under the control of the CPU; A font similarity measurement module that measures font similarity based on font data or metadata stored in a font storage unit; A font selection module for selecting a font to be modified according to the result measured by the font similarity measurement module; And a font modification module for modifying the font selected by the font selection unit.

The font to be transformed is an original font, and the font providing the metadata is a target font.

The font data is characterized by being font type data and outline data for each font type.

The font deformation control of the CPU is characterized by comparing the meta data with the outline data and adjusting the width, height and thickness according to the comparison result.

The similarity measurement module measures the similarity of the font based on any one of visual similarity data, correlation data, and classification data.

The font selection module is characterized in that a font to be modified is requested through the user interface module or automatically selected from the fonts stored in the font storage unit.

The font modification module is characterized by modifying the outline of the original font based on the meta data of the target font.

According to the font conversion method and system using the metadata of the present invention, the outline (outline) of the font of the document viewing apparatus for opening a document is transformed similarly to the font used in the document created in the digital apparatus or the web page, Problems caused by differences in the width and thickness of individual glyphs of fonts which are inevitable due to lack of fonts of digital devices or web pages in the browsing apparatuses, for example, There is an excellent effect that can complement the sense of heterogeneity.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a control system of a font transformation system using metadata according to an embodiment of the present invention; FIG.
Figure 2 is an illustration of metadata extracted from a target font to modify an outline of an original font in an embodiment of the present invention;
Figure 3 is an example Serif example of a small protruding line at the beginning or end of an alphabet letter in an embodiment of the present invention.
Figures 4 and 5 illustrate examples of horizontal reinforcement and longitudinal reinforcement in the font variants of the present invention. 6 is a flowchart illustrating an operation of a method of transforming a font using metadata of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

First, important components referred to in the detailed description of the font modification method and system of the present invention are defined as follows.

The outline font is a font used to display characters on a screen or to print on a screen of a digital device or a web page with a printing typeface expressed by a straight line or a curved outline, and the outline of the characters is calculated according to the size of the printing So that an optimal image is developed.

Therefore, regardless of the size of the characters or the resolution of the printer, even if enlarged or reduced, printing is possible without any problem. A typical outline font used in a personal computer (PC) is Adobe Type Management (ATM) of Adobe Systems Inc. and True Type of Apple Computer Corporation.

A substitute font refers to a font that designates a specific font or displays a similar font instead in view of the fact that a document created by a specific font in a digital device or a web page is displayed abnormally when it is loaded from a device having no corresponding font.

The target font is a font used for digital document creation in a digital device or a web page.

Metadata is data that explains other data. It is information that follows some data, that is, structured information, such as analyzing, classifying, and adding additional information. In the present invention, the original font is transformed Quot; refers to data that is extracted from the target font to be used for outline transformation of the original font.

The original font is a substitute font font existing in a device for opening a digital document or a web page, and is a font that is transformed similarly to the target font.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a control block diagram of a font deformation system using metadata of the present invention. FIG.

In one embodiment, a central processing unit (CPU) 100 is a means for driving a program such that the first font (source font) of the present invention is modified like a second font (target font).

 The CPU 100 may include a program for reading the outline (outline) of the original font and a program for reading the meta data of the target font.

The CPU 100 matches the outline data of the original font read according to the program operation with the meta data of the target font through the meta data matching module 600 and outputs the outline of the original font to the meta data of the target font A program for transforming to conform to the above.

Alternatively, instead of reading the outline of the original font and the metadata of the target font according to the program operation, the CPU 100 may read the outline data of the original font and the meta data of the target font in advance, Information can be obtained from the unit 200.

Alternatively, the outline data of the original font may be acquired in real time, the meta data of the target font may be read in advance and stored in the font storage unit 200, conversely, the meta data of the target font may be acquired in real time, Outline data of the original font may be read out in advance and stored in the font storage unit 200. [

In one embodiment, the font storage unit 200 may store font data and font-specific metadata. The font data may be font type data and outline data for each font type. Therefore, these data can be used for the font transformation as the data of the original font.

The font data and the font-specific meta data stored in the font storage unit 200 may be used for font similarity measurement through the meta-data matching module 600 for selecting an original font similar to the target font.

Information such as font data and font-specific meta data may not be previously stored in the font storage unit 200 but may be obtained in real time by the program execution of the CPU 100 as described above.

In one embodiment, the similarity measurement module 300 may preferably measure similarity based on visual similarity data and / or correlation data and / or classification data obtained according to certain criteria.

The visual similarity data may be, for example, data obtained by comparing photographed font images. The similarity degree data may be, for example, data obtained by extracting and comparing minutiae for each character.

Correlation data is data in which the linear relationship between two fonts separated according to the font meta data is analyzed. For example, when the meta data for each font is included in a predetermined range, it is determined that the correlation data is similar . The predetermined range may be represented by a numerical value.

The classification data may be data in which similarity between two fonts is classified and stored in advance according to visual similarity data or correlation data.

Optionally, the similarity measurement module 300 may measure the similarity between two fonts based on the font metadata, for example, the level of similarity may be expressed as a number or the like.

The number of the fonts may be, for example, a numerical value of meta data for each font, and may be the number of meta data of the two fonts included in a predetermined range.

The similarity measurement module 300 can thus determine the similarity of two fonts based on visual similarity data and / or correlation data and / or classification data.

In one embodiment, the font selection module 400 may select a font based on the measured data in the font similarity measurement module 300.

Optionally, the font selection module 400 may receive one or more font requests via a user interface module (not shown).

The font selection module 400 can set various selection criteria and can receive a request through the user interface module or select a specific font among the fonts stored in the font storage unit 200 according to the selection criteria.

The selection criterion may be any one of visual similarity data obtained by the similarity measurement module 300, correlation data, and classification data.

In addition, the font can be determined randomly through the user interface module without considering all the visual similarity data, correlation data, and classification data as the selection criteria.

In addition, the font selection module 400 can select the font by using the selection criteria as the font metadata stored in the font storage unit 200. [ In this case, for example, a font selected randomly in the font selection module 400 may not be present in the font storage 200 according to a request from the user interface module. Accordingly, in this case, similar fonts can be selected from the fonts existing in the font storage unit 200 as measured by the similarity measurement module 300.

In one embodiment, the font modification apparatus 500 may modify the font selected in the font selection module 400 (source font) similarly to the target font. The main element of the transformation can be defined as an outline (outline).

The font modification module 500 may store the outline data of the original font and the metadata of the target font, which are read out according to the program operation in the CPU 100 or stored in advance in the font storage unit 200, To obtain the degree of change of the outline data of the original font, and to modify the outline of the original font, for example, by using a combination of programming languages for the change of the outline data of the obtained original font .

The font modification module 500 may also automatically perform the modification of the font as described above, either manually or in a programming language. For example, an outline of an original font having the same stroke in some characters can be transformed in the same way.

The font transformed by the font transformation module 500 is a third font that is transformed similarly to the target font which is the second font in the original font which is the first font. Thus, the third font may be substantially the same as or similar to the second font.

As described above, the metadata of the present invention is provided as reference data for transforming an outline of an original font so that an original font looks similar to a target font, and is also provided as reference data for font similarity measurement and font selection .

In the system of Figure 1, Metadata for each font stored in the font storage unit 200 read by the CPU 100 in accordance with the program operation is illustrated in FIG.

Metadata for each font illustrated in FIG. 2 can be defined as follows.

(1) Em Square: For example, 1024 * 1024, 2048 * 2048 may be the number of reference squares in which a font is designed.

(2) Font Unit: It is a unit system that stores the font size and the like on the Em Square,

(3) base line: This is the baseline of character output. The base line is set based on the lower part of each letter, as can be seen from FIG.

(4) x-height: Height from the base line of lowercase x, which is the reference height of a normal character.

(5) ascender: a reference line formed above a predetermined height from the upper limit line of the x-height indicating the reference height of the character, which is determined for the naturalness of the character.

(6) descender: a reference line formed below a predetermined height from a lower limit line of x-height indicating a reference height of a character, and is set for the naturalness of letters as in the ascender.

(7) Ascent or ascender line: It is the sum of x-height and ascender based on base line.

(8) Descent or descender line: It is the sum of x-height and descender based on base line.

(9) Italic Angle: This is the angle of rotation when applying Italic style.

(10) Bold Factor: This is an argument to adjust the thickness of the character in the horizontal direction.

(11) Bold Factor: This is an argument to adjust the vertical thickness of the character.

In addition, the character-specific metadata includes a glyph width indicating the width of each character.

As shown in FIG. 6, for example, for all character libraries of the TRUE type, a method for implementing a modification of a font outline using the system shown in FIG. 1 comprises the following steps.

1) The original font is selected (S10).

In the case of the original font selection, it may be selected based on the data measured by the font similarity measurement module 300 as described above, or may be selected according to a predetermined criterion among the fonts stored in the font storage unit 200 in advance.

Also, the similarity or correlation may be selected based on the font similarity or correlation, and the similarity or correlation may be based on the metadata. It may also be selected based on classification data that is not similarity or correlation.

However, even if the original font is not completely identical to the target font due to the outline transformation, it is important that the font is transformed into a font having a very high degree of visual similarity. Therefore, It will be advantageous in terms of similarity after deformation.

2) The deformation size of the original font is determined (S20).

If the original font to be transformed is selected in the step similar to the target font, the transformed size of the original font should be determined.

The deformation size determining element of the original font is a width and a height which can most affect the degree of similarity after deformation among the various elements (width, height, thickness, etc.) to be deformed so that the original font looks similar to the target font .

In the case of the width of a character, it is desirable to determine the size of the deformation by comparing the Glyph Width, which is the metadata of the target font representing the width of each character and the character of the original font, in units of Font Units.

In the case of the height of a character, it may be x-height which is a reference height of a normal character as described above.

3) Then, the width and height of the characters to be used are proportionally equalized (S30).

After the above step, the width and the height of the character to be used are assumed to be the same ratio, and the ratio is made.

For example,

Assuming that EM square, which is the number of designed reference rectangles of the target font, has a width of 2048 * 500 and EM square, which is the number of designed reference rectangles of the original font, has a width of 1024 * 250,

ScaleFactor = EmSquare of the target font / Em Square of the original font,

The width of the original font = 250 * ScaleFactor.

4) The thickness is adjusted according to the width of the original font in which the deformation size is determined (S40).

When the size of the original font's deformation is determined, the outline (contour) is extracted from the original font and the thickness is adjusted.

In this case, in order to increase the similarity with the target font, the lateral thickness and the thickness deformation size in the vertical direction are determined using the horizontal and vertical bold factors.

FIGS. 4 and 5 illustrate that the outline of the original font is extracted and transformed by the Bold Factor.

As shown in FIG. 4, (a) is a basic character, (b) is a character whose horizontal direction is enhanced by using a horizontal Bold Factor, (c) is a character whose vertical direction is enhanced by using a Vertical Bold Factor to be.

5 (a) is a basic character, (b) is a character whose horizontal direction is enhanced by using a horizontal Bold Factor, and (c) is a character whose longitudinal direction is enhanced by using a Vertical Bold Factor.

  Therefore, it can be visually confirmed from FIGS. 4 and 5 that the thickness is adjusted based on the extracted outline of the original font.

5) Scaling of the original font for actual output is proceeded (S50).

In the above steps, if the width, height, and thickness of the original font are extracted by outline extraction, the scale adjustment of the original font can be performed.

Scaling of the original font for the actual output can proceed as follows.

For vertical scaling, the height of the character is affected by the design element or Serif (the small protruding line at the beginning or end of the alphabet, see Figure 3), so it is based on the x-height rather than the actual height of the character .

 If you do not have x-height, you can use the sum of the ascender and descender lines of each font as a scaling factor instead of x-height.

In this case, the horizontal magnification is the width of the target character / the width of the original character, and the vertical magnification will be x-Height of the target font / x-Height of the original font.

In actual output, adjust the size of the letter by applying the horizontal and vertical scale above.

If the text has Italic style, rotate it using Italic Angle.

100: CPU 200: Font storage unit
300: font similarity measurement module 400:
500: Font transformation module 600: Metadata matching module

Claims (17)

A first step in which a first font is selected to modify an outline of a first font based on metadata of a second font;
A second step of determining a deformation size of the selected first font based on meta data of a second font;
The size of the character is determined by comparing the glyph width (Glyph Width), which is meta data per character of the target font representing the width of each character and the character of the original font, in units of font units, and the height of the character is determined by the standard The size of the deformation is determined by comparing the height x-height,
A third step of transforming the deformation size of the determined first font by applying the deformation size of the first font to the same ratio for each character; And
And adjusting a thickness of each character according to the width of the first font determined by the deformation size. The method according to claim 1,
Wherein the first font is an original font and the second font is a target font. The method of claim 1,
Em Square, the number of reference squares in which the font is designed;
Font Unit, a unit system for storing the font size on Em Square;
Base line, which is the baseline of character output;
X-height, which is the height of the lowercase x from the base line;
An ascender which is a reference line formed on a predetermined height from an upper limit line of an x-height indicating a reference height of a character;
A descender which is a base line formed below a predetermined height from a lower limit line of x-height indicating a reference height of a character;
an ascender line that is the sum of the x-height and the ascender based on the base line;
a descender line that is the sum of the x-height and the descender based on the base line;
Italic Angle, the angle of rotation when applying Italic style;
Bold Factor to control the thickness of the text in the horizontal direction; And
And a Bold Factor which is a factor for adjusting a thickness of a character in the vertical direction. The method of claim 3,
Wherein the x-height is provided as a reference height of a normal character. The method according to claim 1,
Wherein the transformation element of the first font is a width, a height, and a thickness of a character. 6. The method of claim 5,
Wherein the deformation size of the character width is determined by comparing Glyph Width, which is character-specific metadata of the first font and the second font, in units of Font Units. 6. The method of claim 5,
The thickness of the first font may be adjusted,
Wherein the font is represented by adjusting the thickness of the horizontal direction and the thickness of the vertical direction by using a horizontal Bold Factor and a Vertical Bold Factor which are metadata of the second font. The method according to claim 1,
Further comprising a fifth step of adjusting the horizontal and vertical magnification of the first font for the actual output. 9. The method of claim 8,
Wherein, in the case of the vertical magnification, the height of the character is based on x-Height which is metadata. 10. The method of claim 9,
Wherein the height of the character in the case of the vertical magnification is calculated by using the sum of the ascender line and the descender line of each font as a factor of the multiplication factor. A CPU for controlling the transformation of the font;
A font storage unit for storing font data and meta data so that the font is transformed under the control of the CPU;
A font similarity measurement module that measures font similarity based on font data or metadata stored in the font storage;
A font selection module for selecting a font to be modified according to the result measured by the font similarity measurement module; And
And a font modification module for modifying the font selected by the font selection module,
The font transformation module determines the size of the transformation by comparing the glyph width (Glyph Width), which is the meta data of the target font representing the width of each character and the character of the original font, in units of font units, The height is determined by comparing the x-height, which is the reference height of the normal character,
And transforming the transformed size of the font using the same ratio for each character. 12. The method of claim 11,
Wherein the font to be modified is an original font, and the font providing the meta data is a target font. 12. The method of claim 11,
Wherein the font data is font type data and outline data for each font type. 12. The method of claim 11,
In the font deformation control of the CPU,
Wherein the meta data is compared with the outline data, and the width, height, and thickness are controlled according to the comparison result. 12. The method of claim 11,
Wherein the font similarity measurement module measures the similarity of fonts based on any one of visual similarity data, correlation data, and classification data. 12. The method of claim 11,
Wherein the font selection module comprises:
Wherein the user selects a font to be transformed through a user interface module or automatically selects a font stored in the font storage unit. 12. The method of claim 11,
Said font modification module comprising:
And transforming the outline of the original font based on the meta data of the target font.

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