JP2000039879A - Character font transformation output device and program recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely transform a character form such as a considerable change in an outline and thickness of a character, an addition of variegated expressions, etc., and also immediately execute the transformation and efficiently process the transformation even when transforming each character in a document at a time, by storing frequency fonts, expressing outlines of characters by sets of discrete spatial frequency elements, with the fonts made to correspond to various characters. SOLUTION: A CPU 1 fetches a character-code of an object to be outputted, and retrieves a frequency font storage part 2-2 based on this character-code to read out the pertinent frequency font. The frequency font has a data structure according to the development mode of a discrete Fourier series, and a transformation font transformed in the outline of the character by processing the data composing the structure. This transformation font is converted into coordinate data by the inverse Fourier transform. Thus the character font is developed and outputted on this coordinate data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character font deformation output device for deforming and outputting a character font defining the outline of a character, and a program recording medium therefor.

[0002]

2. Description of the Related Art Conventionally, in a document data processing apparatus such as a word processor or a personal computer, when outputting input document data, a bitmap font expressing a character shape by a set of dots or a character outline is partially used. Each time, an outline (vector) font, which is expressed as a set of reference points and a straight line or Bezier curve connecting them, is read out and output / printed out, but the outline font is rotated and italicized compared to the bitmap font. There is an advantage that deformation such as enlargement / reduction is easy, and the contour is smooth after the deformation.

[0003]

However, even outline fonts are not suitable for changing the thickness of one stroke constituting a character or for changing the basic outline of a font greatly. If required, individual fonts had to be prepared in advance as special fonts. In such a case, there is a limit even if the data is compressed and stored structurally by making the font into parts,
The data capacity was large. Furthermore, an outline font generally has a small data capacity when the contour is smooth, but the data capacity explosively increases in a shape that changes (vibrates) finely. Was not prepared in advance. An object of the present invention is to significantly change the outline and thickness of a character by storing a frequency font formed by expressing the outline of the character with a set of discrete spatial frequency components in association with various characters. Or add a variety of expressions,
An object of the present invention is to make it possible to freely change the shape of a character and to execute the deformation immediately, so that even if each character on a document is deformed at once, it can be processed efficiently.

[0004]

The means of the present invention are as follows. According to the first aspect of the present invention, there is provided a font storage means for storing a frequency font having a data structure in which a contour constituting a character is represented by a set of discrete spatial frequency components in association with various character codes, and Reading means for searching the font storage means based on the character code to be output and reading the corresponding frequency font, and processing the data constituting the frequency font when the frequency font is read by the reading means. To generate a deformed font for deforming the outline of a character by performing the processing, a converting means for converting the deformed font generated by the deformed font generating means into coordinate data, and a converting means for converting the converted font into coordinate data. Output means for developing and outputting a character font based on the coordinate data. The present invention may be as follows. (1) There is provided designating means for arbitrarily designating the type and degree of transformation for transforming the frequency font, and the transformed font generating means is adapted to respond to the type of transformation and the degree of transformation designated by the designating means. Generate a modified font. (2) The modified font generation means deletes high-frequency components from a set of spatial frequency components forming a frequency font, and transforms only low-frequency components that govern the general shape of the character. By creating fonts, the whole character is rounded. (3) The modified font generation means deletes, from the set of spatial frequency components constituting the frequency font, those other than the low frequency components that govern the approximate shape of the character, By generating a deformed font composed of a combination with a high high frequency component, the entire character has a roundness and a bleeding as if drawn with a paintbrush. (4) The modified font generation means performs a predetermined modification process for changing the value of a middle frequency component in a set of spatial frequency components constituting the frequency font,
By generating a deformed font in which the corresponding middle frequency components in the set are replaced with the deformed middle frequency components, the whole character has a natural fluctuation element as if drawn with a brush by a person. Let (5) The deformed font generating means performs a predetermined deformation process of changing the value of a higher-order frequency component of a set of spatial frequency components constituting the frequency font, and changes the component to a stronger value. At the same time, by generating a deformed font in which the corresponding higher-order frequency components in the collection are replaced with the higher-order frequency components subjected to the deformation processing, the entire character has a moving element having a strong vibration. (6) The aggregate of the spatial frequency components has a data structure divided into nests by using a contour which is continuous as a nested structure such as an outermost contour constituting a character and a contour present therein as a unit. The modified font generating means removes high frequency components from the set of spatial frequency components and generates a modified font consisting of only low frequency components that govern the general shape of the character. , And make the intersection of the line segment have a summit like written with a brush. (7) The deformed font generating means performs a predetermined deformation process of changing the value of a higher-order frequency component in a set of spatial frequency components constituting the frequency font, and changes the component to a weaker value. At the same time, by generating a transformed font in which the corresponding higher-order frequency component in the collection is replaced with the higher-order frequency component subjected to the transformation process, the entire character is made to have a blur as if written with a brush. (8) The aggregate of the spatial frequency components is numerical information representing the size of a real axis part and an imaginary axis part on a complex plane for each frequency component, and the modified font generating means Applying a predetermined deformation process to change the value of the lowest frequency component of the set of spatial frequency components to a value obtained by multiplying the value of the real axis part or the imaginary axis part by a constant, and changing the value within the set By generating a transformed font in which the corresponding lowest frequency component is replaced by the transformed lowest frequency component, the thickness of the character and the momentum of the character are changed. (9) The set of spatial frequency components is numerical information indicating the size of a real axis part on a complex number plane and an imaginary axis part on a complex plane for each frequency component, and the modified font generation means A predetermined deformation process of changing the value of the middle frequency component of the set of spatial frequency components is performed to change the value of the real axis part or the imaginary axis part to a value whose polarity is inverted, and the correspondence in the set is performed. The character outline is changed to a cycloid curve or a reverse cycloid curve by generating a modified font in which the middle frequency component to be replaced is replaced with the transformed middle frequency component. According to the first aspect of the present invention, a frequency font is read based on a character code to be output, and a modified font for deforming the outline of the character is generated by processing data constituting the frequency font.
This deformed font is converted into coordinate data and output after expansion. Therefore, by storing frequency fonts that represent the outline of a character as a set of discrete spatial frequency components in association with various characters, the outline and thickness of the character can be significantly changed, For example, the character shape can be freely changed, such as adding a simple expression, and the deformation can be executed immediately, so that even if each character on the document is deformed at once, the processing can be efficiently performed.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1A is a block diagram showing the entire configuration of the document data processing device. The CPU 1 is a central processing unit that controls the overall operation of the document data processing device according to various programs loaded in the RAM 2. The storage device 3 includes a storage medium 4 in which an operating system, various application programs, data files, character font data, and the like are stored in advance, and a drive system thereof. The storage medium 4 is fixedly provided or removably mountable, and is constituted by a magnetic / optical storage medium such as a floppy disk, hard disk, optical disk, RAM card, or the like, and a semiconductor memory. The programs and data in the storage medium 4 are
The data is loaded into the RAM 2 under the control of the CPU 1 as needed. Further, the CPU 1 receives programs and data transmitted from other devices via a communication line or the like and stores them in the storage medium 4 or stored in a storage medium provided in other devices. Existing programs and data can be used via a communication line or the like. An input device 5, a display device 6, and a printing device 7, which are input / output peripheral devices, are connected to the CPU 1 via a bus line.
The CPU 1 controls these operations according to an input / output program. The input device 5 has a pointing device such as a keyboard and a mouse for inputting character string data and the like and for inputting various commands. Here, when document data is input from the input device 5 at the time of document creation, the document data is displayed on the text screen of the display device 6 and the determined character string determined by the kana-kanji conversion is stored in the RAM 2. Note that the display device 6 is a liquid crystal display device, a CRT display device, a plasma display device, or the like that performs multicolor display, and the printing device 7 is a full-color printer device, which is a non-impact printer or an impact printer such as thermal transfer or inkjet. Output document data in color.

FIG. 1B shows the main structure of the RAM 2. The character string storage unit 2-1 temporarily stores a character string to be output, and the CPU 1 stores each character constituting the character string. The code is read from the head and the frequency font storage unit 2-2 is searched. The frequency font storage unit 2-2 forms a character generator that stores a frequency font that defines the outline of the character corresponding to various character codes. A frequency font is a data structure expressed in accordance with a discrete Fourier transform expansion method. Each part constituting a character can be represented by a continuous function having a cycle of one cycle of the contour (closed curve). The frequency that vibrates once when making one round is the basic frequency of FFT,
A frequency font is represented by a set of combinations of the fundamental frequency and a frequency that is an integral multiple of the fundamental frequency. Where CP
U1 generates a deformed font in which the outline of the character is deformed by processing data constituting the frequency font,
Write to the modified font storage section 2-3. The deformed font storage unit 2-3 stores a variety of deformed fonts, such as changing the thickness of the character outline and basic character shape, giving a fine vibration to the outline, and giving fluctuations as if handwritten by a person. The CPU 1 generates coordinate data by Fourier-inverting the transformed font, and then develops and outputs bitmap data to the print buffer 2-4 based on the coordinate data.

FIG. 2 is a diagram for explaining the data structure of the frequency font. The contents of the frequency font storage unit 2-2 are as shown in FIG. In the case of a normal outline font, the number of parts is defined and attributes such as a reference point coordinate value, a straight line, and a Bezier curve are defined for each part (each image). In the case of the frequency font in the embodiment, the coordinates of the outline font and the description part of the attribute are a table of the number of spatial frequency components. That is, the frequency font storage unit 2-2
Is configured to store a numerical table that describes a DC component, a fundamental frequency component, and a frequency component obtained by multiplying the DC component, a fundamental frequency component, and an integer thereof for each part in association with the character code, the number of parts, and the part number. Here, the frequency component is expressed as a complex number, and its size is discretely obtained for a real axis part and an imaginary axis part on a complex number plane.
"1" indicates the value of the real axis portion in the X-axis direction on the complex plane, and "Xim" indicates the value of the imaginary axis portion. Similarly, “Yrl” and “Yim” are the value of the real axis part and the value of the imaginary axis part in the Y-axis direction. In the figure, “F0” is a DC component, and the center part coordinates of the contour are described in the real part thereof. Note that a value of “zero” is always described in the imaginary axis part of “F0”. “F1” is a fundamental frequency component representing a frequency that vibrates once when making a round of the contour of the part, and the size and direction of the part are governed by this value. “F2” is a frequency component (secondary high-frequency component) that vibrates twice when making one round of the contour of the part, and the shape of the part is governed by this value, and this value increases in a part that is greatly bent. The following "F3",
“F4” are third- and fourth-order high-frequency components, and the maximum order thereof is a predetermined value.

FIG. 3 shows a real axis part, an imaginary axis part, and a Y axis part in the X-axis direction obtained by performing the FFT processing on the character “sum”.
FIG. 4 is a diagram showing specific numerical values of a real axis part and an imaginary axis part in an axial direction, and showing a correspondence relationship between each part constituting a character “sum” and frequency data of each part. Here, as shown by "1" to "7" in the figure, since this character "Sum" is composed of seven parts, a set of the corresponding spatial frequency components is stored in the frequency font storage unit 2-3 for seven parts. Is stored in Note that the imaginary number of F0 is always “zero” as described above, and FIG. 7 illustrates F0 to F9, but the value continues until the maximum order specified by the sampled number. ing. The data structure of the frequency font may be rearranged into the amplitude and the position as shown in FIG. Since this is an angle formed with the distance from the origin on the complex plane, in the X-axis direction, X amplitude = √
(Xrl ² + Xim ² ), X phase angle = tan ⁻¹ (Xim /
Xrl) in the Y-axis direction.

Next, the operation of the document data processing apparatus will be described with reference to FIGS.
This will be described with reference to the flowchart shown in FIG. Here, programs for implementing the functions described in these flowcharts are stored in the storage medium 4 in the form of program codes readable by the CPU 1, and the contents thereof are loaded into the RAM 2. . In addition,
The same applies to flowcharts in other embodiments described later. FIG. 5 is a flowchart showing the overall operation when printing out a character string. First, after resetting the character pointer to the head position (step A1), the character string storage unit 2-1 is accessed with this pointer value to acquire a character code (step A2). Then, the frequency font storage unit 2-2 is searched based on the character code,
The corresponding frequency font is read and the font is transformed (step A3). This deformation processing is executed according to the flowchart of FIG. 6 described later, and generates a deformed font for deforming the outline of the character by processing data constituting the frequency font.
Then, the transformed font is inversely Fourier transformed to generate coordinate data, and the character font is developed as print pattern data for one character based on the coordinate data (step A4). This one-character print development process is executed according to the flowchart shown in FIG. When the processing for one character is completed in this way, the character pointer is incremented and its value is updated (step A5), and the character string storage unit 2-1 is accessed with the value to check whether all characters have been completed. (Step A6) Returning to step A2 until the end, the above operation is repeated for each character.

Next, the above-described font transformation processing (step A3 in FIG. 5) will be described in detail with reference to the flowchart in FIG. First, a window screen for the user to arbitrarily specify the type and degree of deformation for deforming the frequency font is displayed and output, and by arbitrarily specifying a cursor on the selection items listed on this window screen,
Specify the type and degree of deformation (step B
1). Here, the selection items are "Filter type"
“Cutoff frequency”, “cutoff characteristic value”, “addition value source type”, “addition frequency”, “X real part coefficient”,
“X imaginary part coefficient”, “Y real part coefficient”, and “Y imaginary part coefficient” are displayed in a menu. Here, "Filter type"
Is an item for designating a type of a filter for determining which band of a frequency component is deleted / extracted from a set of spatial frequency components constituting a frequency font. In this embodiment, one of a low-pass filter and a band-cut filter is used. Is selected, and the band is designated by the “cutoff frequency”. The “cutoff characteristic value” specifies, for example, the degree of deformation between the cutoff frequencies F3 = 2π × 3 and F4 = 2π × 4. The “addition value source type” and the “addition frequency” are, for example, a set of spatial frequency components constituting a frequency font, except for the low-frequency components that govern the general shape of the character, and delete this low-frequency component. When generating a deformed font composed of a combination of a frequency component and a specific high-frequency component, the high-frequency component is referred to as an “additional frequency component”, and the value of the additional frequency component is set to a constant value, or another frequency This is a parameter for designating whether or not to reflect the value of the component as a source in the value of the added frequency component. When the type of the transformation and the degree of the transformation are designated by arbitrarily designating the contents of the necessary items in such a window screen, the contents of the frequency font storage unit 2-2 are selectively stored in accordance with the kind of the filter. The process of copying to the unit 2-3 is performed (step B2), and “addition value source type”
A data addition process for changing the value of the addition frequency based on the “addition frequency” is performed (step B3), thereby generating a modified font according to the user's preference.

FIG. 7 is a flowchart detailing the copying process to the modified font storage section 2-3 (step B2 in FIG. 6). First, an initial value F0 is set in a frequency order counter (step C1). Then, the type of filter is determined (step C2). If the filter is a low-pass filter, the condition is that the current frequency of interest (the value of the order counter) is lower than the cutoff frequency (NO in steps C3 and C4). Then, the frequency component indicated by the value of the order counter is read from the frequency font storage unit 2-2 and copied to the modified font storage unit 2-3 (step C5).
Then, the value of the order counter is incremented (step C6), and the process returns to step C2 until it is detected in step C7 that the value exceeds the maximum order in the frequency font storage unit 2-2. Here, in the case of the low-pass filter, if the frequency of interest matches the cutoff frequency, the cutoff specific value is multiplied by that frequency (step C8),
The frequency component obtained thereby is copied to the modified font storage unit 2-3 (step C5). If the frequency of interest exceeds the cutoff frequency, the copy processing in step C5 is skipped to delete the high frequency. On the other hand, in the case of a band cut filter,
Proceeding to step C9, if the frequency of interest is the cutoff frequency, the cutoff frequency is multiplied by the cutoff specific value and copied to the modified font storage unit 2-3 (steps C8, C5). If a mismatch is detected in step C9, the copy processing is skipped. As a result, in the case of a band cut filter, only the specific frequency component is not copied, and the other components are copied as they are. If the type of filter is not specified, the frequency font is copied to the modified font storage unit 2-3 as it is.

FIG. 8 shows a data addition process (step B in FIG. 6).
It is a flowchart which detailed 3). This data addition process is a process for arbitrarily deforming the shape of the character, such as vibrating the outline of the character or changing the thickness by changing the value of a predetermined frequency component. FIG. 8 conceptually shows the contents of the addition processing, and a specific example of how the shape of a character changes by the addition processing will be described in another embodiment described later. Here, the mode of addition will be mainly described. First, an arbitrarily designated addition frequency f (order) is fetched (step D1), and the added value lease type is determined (steps D2 to D4). That is, the value added to the addition frequency is set to “0”, that is, there is no added value (step D
2) Whether it is specified that a constant value should be added as an addition value (step D3), whether the value of the addition frequency itself is accumulated as an addition value (step D4), or another low frequency (F1 and F2) Are averaged, and it is determined whether to reflect the averaged value on the value of the addition frequency, and a process of determining the addition value Q according to the determination result is performed (steps D5 to D8).
Here, QXrl, QXim, QYrl, and QYim are X
This is an added value to be added to the real axis part and the imaginary axis part in the Y direction. When there is no addition (when there is no deformation), "0" is set to them (step D5). In the case of a constant value (for example, when the contour is vibrated), a constant value is set to them (step D6), and in the case of itself (for example, when the thickness is changed), the addition frequency indicated by the order f is set. Values FfXrl, FfXim, FfYrl, FfY
im is set to them (step D7), and when the value of the low frequency component is further reflected (for example, when the contour is naturally vibrated), the average value is set to them (step D8). And this added value QXr
Coefficient K corresponding to 1, QXim, QYrl, QYim
The value is multiplied by 1, K2, K3, and K4, and the value is added to the value of the addition frequency (step D9). When the value of the original addition frequency is “0”, the value of Q is directly substituted as the value of the frequency component.

FIG. 9 is a flowchart detailing the operation when printing characters based on the deformed font (the one-character print development process shown in step A4 in FIG. 5). The procedure shown in FIG. 10 may be performed. First, the modified font storage unit 2-3
And reads out the deformed font and stores it in RAM2.
(Step E1). Then, frequency components are read out from the work memory for each part, and the Fourier inverse transform (IFFT) is performed to obtain coordinate data (step E2). This is drawn in the print buffer 2-4 as a short vector (step E3). That is, an outline font having the coordinates generated by IFFT as a short vector is generated, and is expanded in the print buffer 2-4. here,
The plot interval when outputting characters can be arbitrarily controlled. In other words, if the IFFT is performed by adding data of "0" to the higher-order side at the time of character output, the plot interval becomes narrower, and conversely, if the number of data (order) is reduced, the plot interval can be widened.

As described above, in the first embodiment,
By storing frequency fonts, which represent the outline of a character as a set of discrete spatial frequency components, in association with various characters, the outline and thickness of the character can be significantly changed, and various expressions can be used. , Etc., the shape of the character can be freely changed, and the deformation can be performed immediately, so that even when all the characters on the document are deformed at once, the processing can be efficiently performed. Here, when changing the size of the character, it is possible to enlarge or reduce it by multiplying all the numerical values by a coefficient in the same way as a normal outline font.
The size of the characters can be freely changed. Furthermore, if a high frequency component is cut by a digital filter, a round character can be output, and if a low frequency and a specific high frequency are combined, a fine change (vibration) is added to the outline of the character. In addition, when the thickness of the contour is controlled, various deformations are possible, such as changing the predetermined value of the low frequency components of F1 and F2 (multiplying by a constant). In particular, even if complicated outline shapes that were practically impossible to implement with conventional outline fonts were not implemented as fonts, just by processing the data to draw frequency fonts, Can also be easily deformed. Therefore, the data amount can be significantly reduced as compared with a case where a complicated shape is implemented as an outline font. In addition, the frequency font is divided into a real axis part and an imaginary axis part on a complex plane for each frequency component and represents the size, so that it is suitable for high-speed processing. Also, if the values are expressed as amplitude and phase components for each frequency component, it becomes easier to conceptually understand the low frequency range, and this is effective when arbitrarily specifying a deformation. In addition, since the frequency font has a data structure that is divided into pixels for each stroke constituting a character, in the case of a font having only a low frequency that governs the approximate shape of the character, the deformation is straightforward. In other words, the basic character shape is maintained. In addition, even if the element that constitutes a character is one stroke, such as “Otsu”, the basic character shape can be maintained if the data structure is divided into three for each continuous stroke based on a straight line.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. In the above-described first embodiment, the type of deformation and the degree of the deformation are arbitrarily specified. However, an example in which the whole character is rounded as the type of the deformation and the degree of the deformation is fixed is shown. It shows a specific method of deformation. In other words, by cutting high frequency components from the set of spatial frequency components that make up the frequency font, and generating a transformed font consisting of only low frequency components that govern the general shape of the character, It is designed to have roundness. FIG. 11 is a flowchart basically similar to FIG. 7 described above. In this case, the type of the filter is fixed to a low-pass filter, and the cutoff frequency and the specific value are also fixed on the system. Steps F1 to F6 are for extracting only the frequency components below the cutoff frequency while focusing on the frequency components of the maximum order one by one from F0, and cutting the high frequency components higher than the cutoff frequency. The frequency components are stored in the modified font storage unit 2-3.

FIGS. 12A to 12E show modified examples in this case. The degree of deformation differs as shown in the figure depending on which value is fixedly set as the cutoff frequency. That is, FIG. 12A shows an original character in the case where the cut-off frequency is not set, that is, an original character in the case where the frequency font is developed and output as it is without generating a deformed font. When the cut-off frequency is 2π × 15 (F15), the shape becomes the shape shown in (B), and when the cut-off frequency is 2π × 7 (F7), (C), 2π × 4
When (F4) is set, (D) is set, and when 2π × 3 (F3) is set, the character shape shown in (E) is obtained, and the whole character can be deformed with roundness. Here, in FIG. 11, when the frequency of interest coincides with the cutoff frequency, an intermediate degree of deformation can be realized by multiplying the frequency of interest by a characteristic value (step F7). For example, FIG.
In the case of obtaining an intermediate deformation between the cutoff frequency = 2π × 3 and 2π × 4, the cutoff frequency is set to 2π × 3, and the characteristic value is fixed at “0.5”, thereby obtaining the intermediate deformation. Becomes possible. FIG. 13 shows a case where only the lowest frequency F1 which is the fundamental frequency is extracted in addition to the DC component F0. In this case, the modified font has the data structure shown in FIG. It is transformed into an extremely rounded character, making it the best font for playing.

FIG. 14 is a flow chart showing the operation when the second embodiment is further developed. That is,
A modified font consisting of a combination of this low-frequency component and a high-frequency component close to the sampling frequency, excluding the low-frequency components that govern the general shape of the character from the collection of frequency components that make up the frequency font Is generated so that the entire character has roundness and bleeding as if drawn with a paintbrush. Here, steps G1 to G7 indicate the same filter processing as steps F1 to F7 in FIG. Here, what high frequency is to be combined with the low frequency component stored in the modified font storage unit 2-3 is fixedly determined in the system, and the step G8 calculates the combined frequency f ( Degree)
Take in as. In this case, FIG. 14 shows a case where two types of addition frequencies are combined, and step G
8 shows the first type, and step G11 shows the second type. Then, in the next step G9, a value Q to be added to this frequency is obtained. In this case, the value of the low frequency F1 and F2 is averaged instead of a constant value, and the value is set as the added value Q. Although the addition value Q is determined separately for the real axis part and the imaginary axis part in the X and Y directions, only the real axis part and only the imaginary axis part may be determined. Then, in the next step G10, a process of multiplying the added value by a coefficient K1 (deformation degree constant K1) and adding the result to the added frequency is performed. Step G
Step G also applies to the second addition frequency shown in FIG.
9, the same addition processing as in G10 is performed (step G1).
2, G13). Here, the coefficient K2 indicates a deformation degree constant. Thus, in the second embodiment, F1 and F
The value of 2 is averaged, multiplied by a factor, and the result is added to the sum frequency. That is, F1 and F2
Add the value reflecting the value of. At this time, the addition may be made to only one of the real axis part and the imaginary axis part. Such addition processing is performed in such a manner that the direction of "smearing" (fine vibration) appearing in the outline of the character is adjusted to the directions of F1 and F2 in the low frequency range (that is, the directions of the elements constituting the character). Is performed.

FIG. 15 is a view for explaining the modification in this case. FIG. 15A shows a modification in which the cutoff frequency is 2π × 3 and there is no high frequency combined therewith. (B) shows a cutoff frequency of 2π × 3,
The addition frequency is the maximum order frequency, and the source for obtaining the addition value Q is a fixed value (for example, F1 or F2).
In this case, the addition process is performed on the real axis part and the imaginary axis part in both directions. (C) sets the cutoff frequency to 2π × 3 and the addition frequency to the maximum as in the case of (B) above, but here, the sources are F1 and F2, and the average value is only the real axis part in the XY directions. Is added to
Compared to the deformation of (B), the state of “bleeding” becomes natural, and it is possible to obtain characters as if drawn by a paintbrush.

(Third Embodiment) Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. In the second embodiment described above, a modified font in which a low-frequency component and a specific high-frequency component are combined is generated. However, in the third embodiment, each of the frequency components constituting the frequency font is generated. (F0 to the maximum degree) is used as a modified font, and the value of the middle frequency component is changed according to the degree of transformation. That is, a predetermined deformation process of changing the value of the middle frequency component (addition frequency) in the set of frequency components is performed, and the corresponding middle frequency in the set is processed by the middle process. By generating a deformed font replaced with a frequency component, the whole character has a natural fluctuation element as if drawn with a brush. FIG. 16 shows the font transformation processing in this case. Steps H1 to H6 perform the same processing corresponding to steps G8 to G13 in FIG. 14 described above, and a description thereof will be omitted. In this case, two types of middle frequency components were used. However, only one type may be used, and the average value of the low-frequency components F1 and F2 is assigned to the real axis part and the imaginary axis part of the middle frequency component. Although the addition is performed, the addition may be performed to only one of the real axis part and the imaginary axis part. Here, the middle frequency component is determined as, for example, about 2π × 20, that is, a slightly lower frequency component. FIG. 17 is a diagram for explaining the deformation in this case, and FIG. 17A shows the original character before the deformation. (B) shows an example in which deformation is applied only in the X direction. In the flowchart of FIG.
Although the addition processing is performed in both directions, addition in only the X direction, that is, k1Yrl, k1Yim, k2Y
a modified example in which the values of rl and k2Yim are set to “0”;
(C) shows a modification in which addition is performed for both XY. With this, it is possible to make the whole character have a fluctuation element as if drawn with a brush.
When only the X direction is added as shown in FIG.
The deformation of the impression which is stable compared to the deformation of (C) becomes possible.

FIG. 18 is a flowchart showing the operation when the third embodiment is further developed. That is, the middle frequency component is not fixed, and the middle frequency component is determined for each element constituting the character in accordance with the length of the contour. First, the number of parts for one character is obtained from the frequency font storage unit 2-2 (step J1), and the maximum value of the contour length corresponding to each part in one character is obtained (step J2).
Here, if the contour length of each part is registered and stored in association with each part, the maximum value can be extracted from the stored values. In this state, first, the length of the contour of the first first part is extracted (step J3), and the order f of the addition frequency is determined according to the length (step J).
4). That is, the ratio of the length of the part to the maximum value is determined based on the length of the contour of the part extracted in step J3 and the maximum value extracted in step J2.
The order of the added frequency component is obtained by multiplying the value by the value of the fundamental frequency component F1. When a fraction is generated in the calculation result as described above, a fraction process such as rounding, rounding up, and rounding down is performed. Then, the process proceeds to step J5, where the average value of F1 and F2 (the value Q obtained in step H2 in FIG. 16) is added to the value of the frequency component represented by the order f (step J5). The frequency component obtained in this way is registered as a modified font by replacing the frequency component with the corresponding frequency component in the collection constituting the frequency font (step J6). Until the above-mentioned processing is completed for all parts (step J7), the length of the contour of the next part is extracted (step J8), and the process returns to step J4 and repeats the above operation. As described above, the frequency proportional to the length of the contour of the part is determined as the added frequency component, so that the deformation of the character has an apparently constant vibration period,
It has a natural fluctuation as if drawn by a person.

(Fourth Embodiment) Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. This fourth
In the embodiment, a predetermined deformation process for changing the value of the higher frequency component (addition frequency) constituting the frequency font is performed to change the component to a stronger value.
A modified font is generated by replacing a corresponding higher-frequency component in the collection with a higher-frequency component subjected to the deformation processing. FIG. 19 shows the deformation processing in this case, in which the addition frequency is taken to a higher order side (step K1), and the coefficients of the XY real axis part and the imaginary axis part of the addition frequency are different (deformation degree constant K1, K2,
K3, K4) are added (step K2). Also, different constants K5, K6,
K7 and K8 are added (steps K3 and K4). Here, by adding a different value to the high frequency component more strongly, the whole character has a moving element having a strong vibration. FIG. 20 is a diagram for explaining the deformation in this case. The character after the deformation is violently vibrated with respect to the original character (see A) before the deformation as shown in FIG. FIG.
1 is a case in which a constant is not added to the addition frequency, but a coefficient is multiplied by the real axis portion of F1 and F2 in the low frequency range, and this is added to the real axis portion of the high frequency component, as described in the above embodiments. Thus, the phase of the vibration can be adjusted to F1 and F2.

(Fifth Embodiment) Hereinafter, a fifth embodiment of the present invention will be described with reference to FIG. In each of the above-described embodiments, the frequency font has a data structure in which each of the strokes constituting a character is divided into single strokes. However, in the fifth embodiment, the frequency font is similar to the character of "country". It has a data structure that is divided into continuous contours for each nest as a unit, as in the nested structure such as the outermost contour "purple" and the contour "ball" existing inside. In the case of transforming a frequency font having such a structure, if a transformed font is generated by applying a low-pass filter to the frequency font as described above, as shown in FIG. "Smearing" is created at the intersection of. That is, FIG. 22A shows a modified character in which a high-frequency component is cut off from a frequency font having a data structure in which the character “10” is a component for each stroke as in the other embodiments described above. FIG. 2
2 (B) shows a modification of the fifth embodiment, in which one character as a whole is connected to one part, so that the intersections are smoothly connected to each other, and an "ink pool" as if drawn with a brush is generated.

(Sixth Embodiment) Hereinafter, a sixth embodiment of the present invention will be described with reference to FIGS. This sixth
In the embodiment, a predetermined deformation process of changing a value of a higher-order frequency component (addition frequency) of a set of frequency components constituting a frequency font is performed to change the value of the component to a stronger value, and A modified font is generated by replacing a corresponding higher-order frequency component in the collection with the higher-order frequency component subjected to the transformation process. FIG. 23 is a flowchart showing the deformation processing in this case.
In step L1, the addition frequency is set to a slightly higher frequency,
In addition, to reflect the values of F1 and F2, F1, F2
2 is added to the added frequency component (step L
2, L3). FIG. 24 is a diagram for explaining the deformation in this case. In the sixth embodiment, a deformation effect is obtained in which the original character shown in FIG. )reference).

(Seventh Embodiment) Hereinafter, a seventh embodiment of the present invention will be described with reference to FIGS. This seventh
The embodiment performs a predetermined deformation process of changing its value to the closest frequency component of the set of frequency components constituting the frequency font, and changes the value of the imaginary axis part to a value obtained by multiplying the value by a constant, and The thickness is changed by generating a deformed font in which the corresponding lowest frequency component in the collection is replaced with the lowest frequency component subjected to the deformation processing. FIG. 25 shows the deformation processing in this case, in which the real number axis portion of F1 is multiplied by a constant K1 and multiplied by a constant (step M1). In this case, even if it is one stroke, the unit of parts is a continuous stroke (straight line) based on a straight line
In each case, the thickest control is the easiest, but one part
For example, since one image on the right side of “9” is one part for each image, in the seventh embodiment, the lowest frequency (F1)
The same addition processing as step M1 is performed for the next frequency (F2) (step M2). This is because F2 becomes a base that governs the shape of the character.
FIG. 26A shows a modified example in which the original character is changed, and FIG. 26B shows a modified example in which the thickness is changed. The left side is deformed thick by setting a constant> 1, and the right side is thinned by setting a constant <1. Is the case.

(Eighth Embodiment) An eighth embodiment of the present invention will be described below with reference to FIGS. This 8th
The embodiment changes the momentum of a character by performing a predetermined deformation process of changing the value of the lowest frequency component of the set of frequency components constituting the frequency font and multiplying the value of the real axis portion by a constant number. It is like that. FIG.
Shows the deformation processing in this case. The imaginary axis part of F1 is left as it is, and the real axis part is multiplied by a constant K1 to multiply by a constant (step N1). In this case, as in the seventh embodiment, the momentum can be most easily controlled by setting the unit of each part to a continuous stroke (each straight line) based on a straight line, even for one stroke. For example, since one image on the right side of “9” is one part, in the eighth embodiment as well, the same addition processing as in step N1 is performed for the frequency (F2) next to the lowest frequency (F1). (Step N2). FIG. 26A shows a modified example in which the original character is changed and FIG. 26C shows a modified example in which the momentum is changed.
The right side is a deformation giving a quiet impression by setting a constant <1. The size of the font in the longitudinal direction is changed by the deformation process in FIG. 27 because if the individual parts constituting the font are large, the momentum is strongly felt, and if the individual parts are small, the momentum is weakly felt. .

(Ninth Embodiment) Hereinafter, a ninth embodiment of the present invention will be described with reference to FIGS. This ninth
In the embodiment, a predetermined deformation process for changing the value of the middle frequency component of the set of frequency components constituting the frequency font is performed, and a constant value is subtracted from the value of the real number axis portion in the X direction (polarity is changed). Inverted), the other adds a fixed value, and generates a transformed font in which the corresponding middle frequency component in the set is replaced with the transformed middle frequency component, thereby forming a cloud of the entire character. Such an outline is provided. FIG. 28 is a flow chart showing the modification processing in this case, where the addition frequency is intermediate (2π × 40
(Approximately 50) (Step P1), the constant value K1 is subtracted from the value of the real axis portion in the X direction, and the constant value K1 is added to the other values (Step P2). In this case, the frequency component to be transformed is determined for each element constituting the character in accordance with the length thereof, and a predetermined transformation process is performed on the determined frequency, so that for each component of the character, The number of vibrations appearing in the outline of the character can be visually aligned. Such an optimization process is basically the same as the flowchart of FIG.
FIG. 29 shows a modified example in this case, and FIG.
(B) shows the case where the deformation is performed and (C) shows the case where the filling is performed after the deformation. A cycloid curve appears in the outline of each part, and a deformation like a cloud is obtained. Here, in the flowchart of FIG. 28, another intermediate frequency component is determined as an addition frequency (step P3), and the value of the real axis portion in the X direction is subtracted by a fixed value, and the other values are added. (Step P4). As a result, two types of cycloid curves having different periods appear, resulting in a more complicated deformation.

(Tenth Embodiment) Hereinafter, FIGS.
A tenth embodiment of the present invention will be described with reference to FIG. The tenth embodiment is basically the same as the ninth embodiment, but in the tenth embodiment, an inverse cycloid curve is expressed in each contour to perform a deformation like a holly leaf. . FIG. 30 is a flow chart showing the modification process in this case, in which the middle frequency component is used as the addition frequency (step Q1), but a certain value is subtracted from the value of the imaginary axis portion in the X direction (the polarity is inverted). (D) Others are added (step Q2). Further, another middle frequency is determined as an addition frequency component (step Q3), and the imaginary axis portion in the X direction subtracts a constant value, and the others are added (step Q4).
Note that, as in the ninth embodiment, the real number axis portion in the Y direction may be subtracted according to the sampling direction, and the others may be added. FIG. 31 shows a modification in this case,
(B) shows a case in which addition processing is performed on a character shown in (A) at a constant frequency, and the cycle of the inverse cycloidal curve changes depending on the length of the contour of each part. (C) shows the case where the addition frequency is determined according to the length of the contour of each part. In this case, the addition frequency is set to three types of the basic frequency, twice the frequency, and four times the frequency. , And the period of vibration becomes apparently nearly constant according to the length of the contour of each part. Further, if the optimization processing is performed according to the flowchart of FIG. 18, the apparent cycle becomes closer to a constant.
FIG. 32 shows a modified example of this case.
(B) shows the case after the deformation and (C) shows the case after the deformation. The present invention is not limited to the modifications of the above-described embodiments, but may be freely modified such as a combination thereof.

[0028]

According to the present invention, a character font is represented by a set of discrete spatial frequency components, and a frequency font is stored in association with various characters. You can freely change the shape of the character, such as changing the character drastically or adding various expressions, and you can execute the deformation immediately, even if you change all the characters on the document at once. Can be processed well.

[Brief description of the drawings]

FIG. 1A is a block diagram showing an overall configuration of a document data processing apparatus, and FIG. 1B is a diagram showing a main configuration of a RAM 2.

FIG. 2 is a diagram showing a configuration of a frequency font storage unit 2-2 and a data structure in which a real part and an imaginary part on a complex plane are represented for each frequency component constituting the frequency font, and the data size is represented. .

FIG. 3 is a diagram showing specific numerical values of respective parts constituting a frequency font and showing a correspondence relationship between which parts correspond to which data.

FIG. 4 is a diagram for each frequency component constituting a frequency font.
The figure which showed the other data structure which represented the value by the amplitude and the phase component.

FIG. 5 is a flowchart showing an overall operation at the time of outputting a modified character string.

FIG. 6 is a flowchart detailing step A4 (font deformation processing) in FIG. 5;

FIG. 7 is a flowchart detailing step B2 (copy processing to a modified font storage unit) in FIG. 6;

FIG. 8 is a flowchart detailing step B3 (data addition processing) in FIG. 6;

FIG. 9 is a flowchart showing step A4 (single-character print development processing) in FIG. 5;

FIG. 10 is a diagram illustrating a process from IFFT processing of a frequency font to character printing.

FIG. 11 is a flowchart illustrating font deformation processing according to the second embodiment.

FIGS. 12A to 12E are views for explaining a modification obtained by the modification processing of FIG. 15;

13A and 13B are diagrams for explaining another example in the second embodiment, in which FIG. 13A shows a data structure of a frequency font in this case, and FIG. 13B is a diagram for explaining a modified example thereof.

FIG. 14 is a flowchart showing a font modification process in still another example in the second embodiment.

FIGS. 15A to 15C are diagrams for explaining a modification obtained by the modification processing in FIG. 14;

FIG. 16 is a flowchart illustrating font deformation processing according to the third embodiment.

17A to 17C are diagrams for explaining a modification obtained by the modification processing in FIG. 16;

FIG. 18 is a flowchart illustrating another example of a font modification process in the third embodiment.

FIG. 19 is a flowchart illustrating font deformation processing according to the fourth embodiment.

FIGS. 20A and 20B are views for explaining a modification obtained by the modification processing of FIG. 19;

FIGS. 21A and 21B are diagrams for explaining a modification example obtained by another example of the font modification process in the fourth embodiment.

FIGS. 22A and 22B are views for explaining a modification of the fifth embodiment.

FIG. 23 is a flowchart illustrating font deformation processing according to the sixth embodiment.

FIGS. 24A and 24B are views for explaining a modification obtained by the modification processing of FIG. 23;

FIG. 25 is a flowchart illustrating font deformation processing according to the seventh embodiment.

FIGS. 26A and 26B are diagrams showing an original character, FIG. 26B showing a modification of the seventh embodiment, and FIG. 26C showing a modification of the eighth embodiment.

FIG. 27 is a flowchart illustrating font deformation processing according to the eighth embodiment.

FIG. 28 is a flowchart illustrating font deformation processing according to the ninth embodiment;

FIGS. 29A to 29C are views for explaining a modification of the ninth embodiment;

FIG. 30 is a flowchart illustrating font deformation processing according to the tenth embodiment.

FIGS. 31A to 31C are views for explaining a modification of the tenth embodiment;

FIGS. 32A to 32C are diagrams in the tenth embodiment;
FIG. 9 is a diagram for explaining a modification example obtained by another font modification process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 2 RAM 2-1 Character string storage part 2-2 Frequency font storage part 2-3 Modified font storage part 2-4 Print buffer 3 Storage device 4 Storage medium 5 Input device 6 Display device 7 Printing device

Claims (18)

[Claims] 1. A font storage means for storing a frequency font having a data structure in which a contour constituting a character is represented by a set of discrete spatial frequency components in association with various character codes, and an output target. Reading means for searching the font storage means on the basis of the character code, and reading out the corresponding frequency font; and when the reading means reads out the frequency font, by processing data constituting the frequency font. A deformed font generating means for generating a deformed font for deforming the outline of a character; a converting means for converting the deformed font generated by the deformed font generating means into coordinate data; and a coordinate data converted by the converting means. Output means for expanding and outputting a character font based on the character font. Point deformation output device. 2. The frequency font according to claim 1, wherein the outline of the character is represented by a set of discrete spatial frequency components in accordance with a discrete Fourier series expansion method. 2. The character font modification output device according to claim 1, wherein the information is numerical information representing the size of a real axis part and an imaginary axis part on a complex plane. 3. The character font deformation output device according to claim 1, wherein the aggregate of the spatial frequency components has a data structure divided for each stroke in units of one stroke constituting a character. . 4. An aggregate of the spatial frequency components is data obtained by dividing a continuous contour for each nest as a unit according to a nested structure such as an outermost contour constituting a character and a contour existing inside the outermost contour. 2. The character font transformation output device according to claim 1, wherein the character font transformation output device has a structure. 5. The set of spatial frequency components is divided for each line segment in units of a continuous stroke portion based on a straight line, even if the element constituting the character is one stroke. 2. The character font modification output device according to claim 1, wherein the character font modification output device has a data structure. 6. A design unit for arbitrarily designating a type of transformation and a degree of transformation for transforming the frequency font, wherein the transformed font generating unit is adapted to generate the type of transformation and the degree of transformation designated by the designating unit. 2. The character font modification output device according to claim 1, wherein a modified font corresponding to the character font is generated. 7. The modified font generation means deletes high-frequency components from a set of spatial frequency components constituting a frequency font, and comprises only low-frequency components that govern the general shape of a character. 2. The character font deformation output device according to claim 1, wherein the whole character is rounded by generating a deformation font. 8. The modified font generation means deletes, from a set of spatial frequency components constituting a frequency font, a component other than a low-frequency component that governs a general shape of a character,
2. The character according to claim 1, wherein a modified font comprising a combination of the low-frequency component and a particularly high high-frequency component is generated so that the entire character has a roundness and a bleeding as if drawn with a paintbrush. The described character font transformation output device. 9. The modified font generation means performs a predetermined modification process for changing a value of a middle frequency component of a set of spatial frequency components constituting a frequency font, and performs a corresponding process in the set. By generating a deformed font in which the middle frequency component is replaced by the middle frequency component subjected to the deformation processing, the whole character has a natural fluctuation element as if drawn by a brush. 2. The character font deformation output device according to claim 1, wherein: 10. The modified font generating means performs a predetermined modification process of changing a value of a higher-order frequency component of a set of spatial frequency components constituting a frequency font, and changes the component to a stronger value. In addition, by generating a deformed font in which the corresponding higher-order frequency components in the collection are replaced with the higher-order frequency components subjected to the deformation processing, the entire character has a moving element having a strong vibration. 2. The character font transformation output device according to claim 1, wherein: 11. An aggregate of spatial frequency components is a data structure that is divided into nests in units of nested outlines, such as an outermost outline constituting a character and an outline present therein. Wherein the modified font generation means deletes high frequency components from the set of spatial frequency components and generates a modified font consisting of only low frequency components that govern the approximate shape of the character. 2. The character font transformation output device according to claim 1, wherein the intersections of the line segments are provided with a summit like written with a brush. 12. The modified font generating means performs a predetermined modification process for changing the value of a higher-order frequency component of a set of spatial frequency components constituting a frequency font, and changes the component to a weaker value. In addition, by generating a deformed font in which the corresponding higher-order frequency component in the collection is replaced with the higher-order frequency component subjected to the deformation processing, the entire character has a blur as if written with a brush. 2. The character font transformation output device according to claim 1, wherein: 13. The modified font generation means according to claim 13, wherein the aggregate of the spatial frequency components is numerical information representing the size of a real axis part and an imaginary axis part on a complex plane for each frequency component. A predetermined deformation process of changing the value of the lowest frequency component of the set of spatial frequency components is performed to change the value of the real axis part or the imaginary axis part to a value obtained by multiplying the value by a constant. By generating a transformed font in which the corresponding lowest frequency component has been replaced by the transformed lowest frequency component,
2. The character font deformation output device according to claim 1, wherein the thickness and the momentum of the character are changed. 14. The method according to claim 13, wherein said modified font generation means performs a modification process on the lowest frequency component and the next lowest frequency component among the set of spatial frequency components. Character font transformation output device. 15. The set of spatial frequency components is numerical information indicating the size of a real axis part on a complex plane and an imaginary axis part on a complex plane for each frequency component. Is subjected to a predetermined deformation process of changing the value of the middle frequency component of the set of spatial frequency components to change its real axis part or imaginary axis part to a value whose polarity is inverted, and within the set. A modified font in which a corresponding middle frequency component is replaced with the transformed middle frequency component is generated to change the contour of the character into a cycloid curve or an inverse cycloid curve. Item 1. The character font deformation output device according to Item 1. 16. The modified font generating means determines the frequency component to be transformed for each element constituting a character according to the length of its outline, and determines the frequency component for each element constituting a character. 16. The method according to claim 9, wherein a predetermined deformation process is performed on each of the frequency components, so that the number of vibrations appearing in the outline of the character is visually aligned for each component of the character. The described character font transformation output device. 17. The modified font generating means performs a transformation process in which a value of a low-frequency component is reflected in a frequency component to be transformed, thereby changing a direction of vibration appearing in a character outline to a low-frequency range. 11. The character font deformation output device according to claim 7, wherein the character font direction is adjusted to the direction of the component. 18. A deformed font for deforming a character outline by processing a data constituting a frequency font in which the outline of the character is expressed by a set of discrete spatial frequency components to a computer. A recording medium storing a program for realizing a function of generating, a function of converting a generated deformed font into coordinate data, and a function of developing and outputting a character font based on the generated coordinate data.