JPH1125253A - Method for drawing eyebrow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To draw a natural eyebrow in a make-up system and obtain a method for drawing it in a state of matching with the image of a face with no make-up by drawing an eyebrow based on numeric values which are acquired by a means setting an eyebrow drawing area and a means which sets the base position of an eyebrow in the eyebrow drawing area with a formula including random numbers, etc. SOLUTION: This method for drawing an eyebrow by using a computer has each means which sets an eyebrow drawing area and sets the base position of an eyebrow in the eyebrow drawing area with a formula including random numbers. Also, an eyebrow length and direction setting means calculates the length and direction of an eyebrow and the base position of the eyebrow from a formula including random numbers. An eyebrow thickness setting means makes calculation, based on the thickness of an eyebrow, the base position of eyebrow and the distance from an eyebrow base which are obtained by the eyebrow length and direction setting means. Then, an eyebrow is drawn, based on numeric values acquired by these calculating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyebrow drawing system using computer graphics. For details, the field of drawing eyebrows in makeup systems,
The present invention relates to a technical field of displaying a face image by changing various eyebrows with an instant synthetic photographing device using computer graphics.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 08-329278 (image processing apparatus) discloses a method for removing hair from a computer graphic image. In this apparatus, the head portion is removed from the head, and the head region from which the hair has been removed is painted in the skin color of the face. Each point representing the facial features such as the contour of the face, eyes, nose, mouth, and eyebrows is performed using a wire frame model.

In Japanese Patent Application Laid-Open No. 06-342460 (a portrait creation method), various facial contour patterns having ears, hair patterns, eyebrows, eyes, nose, mouth, etc., created by the portrait technique are used as image information. Each pattern is synthesized with the face by using a computer and input devices such as a keyboard and a mouse.

[0004]

SUMMARY OF THE INVENTION As described in the prior art, the present invention provides, as a pattern, components for removing hair from the head and painting with a skin color, and for characterizing a face such as eyes, nose and eyebrows. The method and device to synthesize the face
Already exists. In addition, there is already a method of combining a message, a background, and the like with a face photograph. Further, in a makeup system according to the related art, there is a method of simulating makeup by drawing eyebrows with eyebrows.

[0005] However, there has been no method of drawing eyebrows in a natural form by a computer and synthesizing them with a face image.
An object of the present invention is to provide a method of drawing a natural eyebrow in a makeup system or the like and a method of drawing the natural eyebrow in a state that matches the image of the real face. It is another object of the present invention to draw natural eyebrows on an instant composite photographic device for making a photo sticker or the like.

[0006]

In order to solve the above problems, an eyebrow image is formed by the following means. (1) means for setting an eyebrow drawing area, (2) means for setting the eyebrow root position of the eyebrow drawing area by a mathematical expression including a random number,
(3) eyebrow length / direction setting means for calculating the eyebrow length and direction from a formula including a base position and random numbers of the eyebrows, and (4) the eyebrow density obtained by the eyebrow length / direction calculation means. An eyebrow darkness setting means for calculating based on the eyebrow root position and a distance from the eyebrow root, and (5) an eyebrow comprising means for drawing the eyebrows based on the numerical value obtained by the calculation means. Drawing method.

[0007] A uniform random number ebrand is added to the value obtained in the above (4).
Gives a variation in the depth of each eyebrow,
More natural drawing.

[0008] The eyebrow drawing method of the present invention will be described with a more specific example. (1) Based on the eyebrow template mask image for the eyebrow drawing area, the x coordinates of the eyebrow head, eyebrow mountain, and eyebrow tail are lx, cx, rx, the y coordinate of the eyebrow mountain is eby, the vertical center cy (x) of the new eyebrow area, and the height hy (x) of the new eyebrow area for each x coordinate, the maximum of hy (x) The value is assumed to be hymax. (2) For each point (x, y) in the eyebrow drawing area, a point (x, y) where rand2 ≦ ceb · rate1 · rate2 is determined as the eyebrow root position (sx, sy) I do. Where rand2 is a uniform random number that takes a value of 0 ≦ rand2 ≦ 1 ceb is a value that satisfies 0 ≦ ceb ≦ 1 c1 is a constant that represents the density of the entire eyebrow The constants rate1 and rate2 are values obtained by the following formula rate1 = 1- (| x-cx |) / {(| cx-lx |) · c1} (x <cx) = 1- (| x-cx |) / {(| Cx-rx |) ・ c1} (x ≧ cx)) rate2 = 1-{(| y-cy (x) |) / (dy (x) / 2)} ^ 3 (3) Root of eyebrows Determine the length l of eyebrows and its direction θ from the position (sx, sy) by the following formula: θ = -π / 6 + 2/3 · π · (| sx-rx | / | rx-lx | ^ 2 -rand2 · π / 9 (y ≧ cy (sx)) = -π / 6 + 2/3 · π · (| sx-rx | / | rx-lx | ^ 2 + rand2 · π / 9 (y <cy (sx)) l = hymax / 4 ・ (1 + rand2 / 2) (4) Represents the density of the point (x, y) on the eyebrows represented by the straight line (sx, sy)-(ex, ey) Obtain the eyebrow degree ebrate (x, y) by the following formula: ebrate (x, y) = 1-sqr {(x-sx) ^ 2 + (y-sy) ^ 2)} / [c2 ・ sqr {(ex -
sx) ^ 2 + (ey-sy) ^ 2}] Here, sqr (z) is the square root of the variable z, and c2 is a constant. This is a method for drawing eyebrows.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the eyebrow drawing method of the present invention, there is a method of changing eyebrows of a human image captured in a computer image as follows. (1) Import image data of a real face into a computer using an image input device such as a digital camera or an image scanner, specify several points around the eyebrows with respect to the eyebrows of the real face, and smooth the eyebrows with each point smoothed. Shaving off
Means for erasing eyebrows by repainting with background color, (2) displaying a previously prepared eyebrow template mask image on a display device, drawing eyebrows using a calculation formula including uniform random numbers, and approximating actual eyebrows Means for drawing an eyebrow texture mask expressed in the sense of nature. (3) For the face captured in (1), the inner face of the nostril, the eyebrow mountain, the outer iris, and the outer corner of the eyes are taken as feature points of the face, Means for defining the position of the eyebrow as a feature point, means for enlarging, reducing, moving, etc. without changing the shape of the eyebrow texture mask drawn in (4) and (2), and combining it with the face image, (5) (1) The eyebrows are displayed by changing the shape of the eyebrows using the method of drawing eyebrows by the methods (4) to (4), and comparing and displaying the original eyebrows and the newly drawn eyebrows.

According to the present invention, the eyebrows can be automatically drawn. However, in the above (1), the specification of the defining points characterizing the eyebrows, (2) the selection of the eyebrow template mask image, and (3) the face The user specifies the definition points of the feature points. However, when combining a plurality of eyebrow patterns with a face image at the same time, it is possible to automatically select an eyebrow template mask image.

The files used in the present invention are basically an eyebrow template mask image file, a constant file, and a face image file. The eyebrow template mask image file is a database in which a large number of eyebrow types are registered as black-and-white grayscale images (hereinafter, this file is referred to as “eyebrow template mask DB”).

The constant file is a file in which constants used in each equation used in the present invention are registered. The constants registered here are data that can perform eyebrow drawing most suitable for the gist of the present invention as a result of experiments. This constant is initialized when the system of the present invention starts up. Therefore, it is expressed as a variable on the program. The face image file is image data captured by an image scanner, a digital camera, or the like. Usually, it is a temporary file (temporary file).

First, an eyebrow region is defined in order to erase eyebrows from an original face image. The eyebrow area is P1-P7 that characterizes the eyebrows
Are defined by the following seven points. In the following, the left eyebrow (the right when viewed from the facing direction) is taken as an example, and the coordinate system is such that the right horizontal direction is the positive direction of the x-axis and the upward vertical direction is the positive direction of the y-axis.

As shown in FIG. 1, the upper part of the inner part of the eyebrow (brows) is P1, the upper part of the upper part of the eyebrow is P3, and the outer part of the eyebrows (tail of the eyebrow) is P4. The lower part of the eyebrows corresponding to P1 and P3 is P7 and P5, and the intermediate point between P1 and P3 is P2, and the intermediate point between P7 and P5 is P3. That is, the area closed by P1 to P7 is the eyebrow area,
To make this a smooth area along the border of the eyebrows,
Smooth with spline curve.

However, the boundary between the eyebrows and the skin may not be clearly separated. Therefore, since the original eyebrows may remain when the eyebrows are erased, dh = | P3y-P5y | / 2 (1) The area outside the closed area obtained by the spline curve by the distance dh (See FIG. 2). Hereinafter, the extended area is also referred to as an eyebrow area. The symbol | x | in the formula represents the absolute value of x.

The eyebrow is erased based on the eyebrow area information defined above. In order to draw a new eyebrow, if it is the original makeup, the common part (the area where the original eyebrow and the drawn eyebrow overlap) in the newly drawn eyebrow area and the original eyebrow area
Must be kept, and the original eyebrow area other than the common part must be erased. However, if a part of the original eyebrow is left, the boundary with the newly drawn eyebrow becomes unnatural. Therefore, in the present invention, all the original eyebrows are erased before newly drawing the eyebrows. This is done in the following way.

First, using the above-mentioned eyebrow area information, y of the point closest to the eyebrow area above the eyebrow area for each x coordinate
The coordinates are determined as uy (x), and similarly, the y-coordinate of a point below the eyebrow area and closest to the eyebrow area is determined as dy (x) (FIG. 3). Here, the color value of each coordinate is assumed to be col (x, y). Generally, a color value has three values of R, G, and B. Unless otherwise specified, operations on col (x, y) are R, G, and B, respectively.
The same operation is performed for each of B.

For each point (x, y) in the eyebrow area, a color value col (x, y) is obtained as a skin color by the following formula. col (x, y) = {col (x, uy (x)) ・ | dy (x) -y | + col (x, dy (x)) ・ | uy (x) -y |} / | d ( x) -uy (x) | (2) Since the color value obtained by the expression (2) is interpolated in the vertical direction, vertical stripes appear thin. Therefore, the following formula is applied to further smooth the horizontal direction and eliminate the vertical stripes. col (x, y) = {col (x-1, y) + col (x, y) + col (x + 1, y)} / 3 ……… (3)

However, since equation (3) simply averages the center color with the left and right colors (see FIG. 3), the skin looks smooth and has no natural feeling. So (2),
Expression (3) expresses natural feeling with respect to col (x, y) obtained by the following expression. col (x, y) = col (x, y) + c ・ rand1 ……… (4)

Here, rand1 is a uniform random number in the range of -1 to +1 and c is a constant indicating the degree of color value variation. In the experiment, when 0 ≦ col (x, y) ≦ 255, a good result was obtained when c = about 10. of course,
The degree of variation varies between people with fine skin and those without. Although c = 10 is registered as a standard value in the constant file, it is more realistic to allow the degree of variation c to be input in order to cope with a case where the value deviates from the standard. There is not much problem even if c = 10 is handled in automatic processing. This is because most of this area is filled with eyebrows described later.

The eyebrow area can be erased by using the above equations (1) to (4), and the eyebrow area can be newly filled with a flesh color.
As a result, the eyebrows are shaved off, and a natural background image without eyebrows is required.

Next, a method of drawing an eyebrow will be described. Since the eyebrow template mask image is registered in the database,
The pattern is displayed on the display as a list, and the user is allowed to make a selection. However, when a plurality of eyebrow drawing are automatically performed, this processing may be omitted. in short,
The form to be taken depends on the application to be handled.

Further, according to the present invention, the eyebrow shape (eyebrow template mask) selected before drawing the eyebrows can be displayed so as to be superimposed on the original eyebrows. Judgment criteria for selection can be given. This point will be mentioned later.
Here, the description will focus on the eyebrow drawing method.

First, it is assumed that the x-coordinates of the eyebrow head, the eyebrow peak, and the eyebrow tail as shown in FIG. 4 are lx, cx, rx, and the y-coordinate of the eyebrow peak is eby. The eyebrow part (black area) in the figure is called a new eyebrow area. Each x based on the eyebrow template mask image
For the coordinates, the vertical center cy (x) of the new eyebrow area and the height hy (x) of the new eyebrow area are obtained.

The maximum value of hy (x) is defined as hymax, and an appropriate constant ceb (0 ≦ ceb ≦ 1) representing the density of the entire eyebrow is introduced.
The closer the ceb is to 1, the thicker the eyebrows, and the closer to 0, the thinner the eyebrows.
In the experiments, ceb = 1/6 showed good results. However,
Since this also has individual differences, it is more realistic if it is set as an input item. Of course, there is no problem in dealing with 1/6.

The position in the new eyebrow area where the eyebrows are actually formed is determined using the following equation. Rate1 = 1- (| x-cx |) / {(| cx-lx |) · c1} (x <cx) = 1- (| x-cx |) / {for each point (x, y) (| Cx-rx |) ・ c1} (x ≧ cx) ……… (5) rate2 = 1-{(| y-cy (x) |) / (dy (x) / 2)} ^ 3 …… … (6) is calculated, a uniform random number rand2 (0 ≦ rand2 ≦ 1) is generated, and if rand2 ≦ ceb · rate1 · rate2, hair is grown on the point (x, y). Otherwise, the point (x, y)
Do not grow hair on.

When growing hair, (x, y) is replaced with (sx, sy). This point (sx, sy) is the base position where the eyebrows grow. In the above equation, the symbol ^ represents a power. Also (5)
This is because the constant c1 used in the equation does not make the probability of eyebrow growth at the end of the eyebrow zero. Normally, when c1 = 1.2, a natural boundary between the eyebrows and the skin is obtained.

Next, the length l of the eyebrows and the direction θ of the eyebrows formed from the base position (sx, sy) of the eyebrows are determined by the following equation. θ = -π / 6 + 2/3 · π · (| sx-rx | / | rx-lx | ^ 2-rand2 · π / 9 (y ≧ cy (sx)) = -π / 6 + 2/3・ Π ・ (｜ sx-rx ｜ / ｜ rx-lx ｜ ^ 2 + rand2 ・ π / 9 (y <cy (sx)) ……… (7) l = hymax / 4 ・ (1 + rand2 / 2) ……… (8)

Therefore, from equations (7) and (8), the point (ex, ey) at the tip of the eyebrow is ex = sx + l · cos (θ) (9) ey = sy + l · sin (θ) ……… (10) That is, the straight line (sx, sy)-(ex, ey)
Becomes a single newly drawn eyebrow.

The eyebrows drawn by the above equation have a uniform thickness, though there are variations in length, angle, position of growth, and the like. Therefore, in order to further vary the depth (thickness) of each eyebrow, a uniform random number ebrand (ebrandmin ≦ ebrand ≦ 1) is prepared. Here, ebrandmin is a constant indicating the degree of variation, and the variation increases as ebrandmin approaches zero. The eyebrow degree ebrate (x, y) of the point (x, y) on the line (sx, sy)-(ex, ey) is defined as follows. ebrate (x, y) = 1-sqr {(x-sx) ^ 2 + (y-sy) ^ 2)} / [c2 ・ sqr {(ex-sx) ^ 2 + (ey-sy) ^ 2} ] ……… (11) where sqr (z) represents the square root of the variable z and the constant c2
Is assumed to be 1.2. According to equation (11), an eyebrow with a deep root and a thin tip can be drawn. Further, if a uniform random number ebrand is applied to this value, the density of each hair also varies, resulting in a more natural drawing.

A new eyebrow texture mask image is created based on the values obtained by the above equations. The size and coordinate system of the eyebrow texture mask image (monochrome grayscale image) are the same as the eyebrow template mask image. Based on the above method, eyebrows are drawn one by one on this eyebrow texture mask image. The color value (gray level) col (x, y) of the point (x, y) on the straight line (sx, sy)-(ex, ey) is col (x, y) = COLMAX · {1-ebrate (x , y)} ……… (12). Here, COLMAX is the maximum value of the color value (shade value), and when col (x, y) is 0, it is the black eyebrow portion,
If col (x, y) is COLMAX, it is white and not an eyebrow. FIG. 5 shows an example of an eyebrow drawn using the above method.

The feature points of the face are defined by four points F1 to F4 shown in FIG. That is, F1: inside the nostril F2: Mt. Bizan F3: outside the iris F
4: Eye corners.

From the eyebrow template mask image in FIG. 4 and the feature points of the face in FIG. 6, lx = F1.x cx = (F3.x + F4.x) / 2 (13) eby = F2.y In order to achieve this, the newly drawn eyebrow texture mask image of FIG. 5 is enlarged, reduced and moved without changing the length and width,
The face image and the eyebrow structure mask image are combined. Thus, one kind of eyebrow drawing processing is completed. Note that Fn.x and Fn.y in the equation (13) represent the x coordinate and the y coordinate at the point Fn, respectively.

The comparison of the original eyebrows with the newly drawn eyebrows and simultaneous display can be performed when the user selects an eyebrow shape or by comparing and displaying the state after drawing the eyebrows and before drawing. It is important for checking. Further, when used as a makeup system, there is an advantage that the position where the original eyebrow is shaved and the position where the eyebrow is drawn with the template (eyebrow type) are clearly shown. Therefore, in the present invention, the changed eyebrows are superimposed on the original eyebrows in a frame or translucent shape and displayed. By superimposing and displaying as shown in FIG. 7, it is possible to know the position where the eyebrows are originally shaved when shaving the eyebrows, and the position where the eyebrows are set on the face when using the template. Further, it is possible to give a material for selection determination when selecting the eyebrow pattern.

FIG. 8 is a flowchart in the case where the above processing is systematically used. Here, this is an example in which one face image is captured by a digital camera or the like, and the process is repeated many times while selecting the eyebrows. Hereinafter, the contents of the flowchart will be briefly described.

In the process S1, a face image is read into a computer by a digital camera or an image scanner, and initialization of constants (variables in a program) of expressions used for drawing eyebrows is performed from a constant file. In the following, changing of the constant is not mentioned, but it is more general if the constant can be changed by keyboard input. However, as described in the text, normally, the value specified in the text does not cause any problem. It is a standard value confirmed by experiment.

In steps S2 and S3, the user looks at the face image and specifies a defined point. As an input device at this time, a mouse is generally used for a personal computer, and an arrow key is generally used for an instant composite photographing device. Also processing
S4, S6, S8, and S13 are determination processes that require a user's response to a question from the computer. The “selection of eyebrow type” in the process S5 is a process of displaying an eyebrow template mask image from the computer in a list form, and then selecting a user's favorite eyebrow type from the image.

The processes S7 and S14 are for displaying the original eyebrows and the changed eyebrows in a superimposed manner. The former is the display in the state of the template even if the changed eyebrows are called, and the latter is the present invention. Displays the eyebrows drawn using the eyebrow drawing method. The former is used as a reference for selecting an eyebrow type (eyebrow template), and the latter is used as a reference when comparing the results and when actually shaving or drawing the original eyebrows.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Since the eyebrows to be drawn by the present invention are expressed in a natural state, the present invention can be applied not only to a makeup system but also to an instant composite photographing apparatus. Embodiments of the present invention will focus on applications in the latter field.

To use the eyebrow drawing of the present invention as a system, an apparatus having a computer function such as a personal computer,
A display device, a device such as a digital camera or an image scanner that takes in a face image as image image data is required. An input device for defining a face or an eyebrow region, such as a mouse or a light pen.
There is a need for a device that can directly point an image on a display screen in dot units.

Many of the present instant composite photographing apparatuses are provided with a monitor television, and a customer selects a background or a message prepared in advance from a menu from a keyboard, and positions his / her own position in accordance with the background displayed on the screen. And then take a picture. Some types of photos can be taken, while others have the same face photo printed as a small stamp-size face photo and are printed in multiple stickers. Another special thing is making a face stamp.

FIG. 9 is a flowchart showing a processing procedure when a photograph is taken by changing the eyebrows in the instant composite photographing apparatus using the eyebrow drawing method of the present invention. In the flowchart, the processing with the number “u” added thereto requires the user to make some response.

In the processing shown in the figure, two types of photographs can be taken. As shown in (Note) in the figure, the flow of the sequence of the process S5 is a case where the eyebrow shape is automatically changed and a plurality of photographs with a plurality of eyebrow shapes are printed on one sticker. On the other hand, the flow of the series of the processing S7 is a case where one face photograph is created with the eyebrow shape selected by the user. Of course, a method of selecting a plurality of eyebrows can be adopted in the flow of the processing S5, but in the example of FIG. 9, the eyebrow template is automatically selected. In this case, when selecting an eyebrow shape in the process S1, there is a method of automatically selecting a plurality of eyebrow shapes based on the information by inputting the age and gender in advance.

FIG. 10 shows an original face image, and FIGS. 11 and 12 show examples in which a face image is drawn using the eyebrow drawing method of the present invention. When the entire face is drawn, the balance with the entire face can be understood, and the difference in the overall impression due to the change in the shape of the eyebrows can be compared and seen. When the eyes and eyebrows are drawn in an enlarged manner, it can be seen that the impression of the eyes changes depending on the shape of the eyebrows. If the enlarged photograph of the eyes and eyebrows can be selected and printed in the photograph of the process S7 in FIG. 9, the makeup effect by the eyebrows can be presented to the user.

[0045]

The most significant feature of the present invention is that the eyebrows can be expressed in a natural form in accordance with the characteristics of the face, and that the expression method has a high degree of freedom. For example,
Skin color of eyebrow area (Equations (3) and (4)), density of eyebrow growth (Equations (4) and (5), expression of total eyebrow density), direction of eyebrow growth ((7) Equations (10), eyebrow length (Equation (8)), and eyebrow density (Equations (11) and (12)) are determined by the calculation formulas, and there are variations in each of the determinants by random numbers. Gives a more natural feeling. Since the characteristics of these eyebrows are determined by a calculation formula, there is a degree of freedom in how to draw the eyebrows.

In the embodiment of the present invention, constants are determined based on simulation results, and values giving the most standard natural feeling are introduced. However, in order to draw a unique eyebrow, it is only necessary to change this constant, and thereby the impression of the eyebrow can be freely changed. For example, the density of the entire eyebrow depends on the constant ceb (variable in the program, the value initialized by the constant file), but changing this value will change the density of eyebrow growth and change the density of the entire eyebrow. Can be expressed in different states.

As described above, in the present invention, the eyebrow drawing method of precisely drawing each eyebrow is adopted, unlike the conventional makeup system, in which the photograph is taken by changing the shape of the eyebrows using an instant synthetic photographing device or the like. And other fields.

On the other hand, when used as a makeup system, the original eyebrow and the newly drawn eyebrow are combined and displayed, so that the position where the template is applied becomes clear, and the shaved portion of the original eyebrow and the newly drawn eyebrow Is easily understood by the user.

[Brief description of the drawings]

FIG. 1 is a diagram for describing defined points of an eyebrow region according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a new eyebrow area according to the embodiment of the present invention.

FIG. 3 is a diagram for explaining a relationship between coordinates and color values used for filling a new eyebrow region with a flesh color in the embodiment of the present invention.

FIG. 4 is a diagram showing coordinates of an eyebrow tip, an eyebrow peak, and an eyebrow tail in a new eyebrow area according to the embodiment of the present invention.

FIG. 5 is an example of eyebrows drawn using the eyebrow drawing method of the present invention in the embodiment of the present invention.

FIG. 6 is a diagram showing points defining facial features according to the embodiment of the present invention.

FIG. 7 is a diagram for explaining a method of displaying an original eyebrow and a changed eyebrow in a superimposed manner according to the embodiment of the present invention.

FIG. 8 is a flowchart illustrating an example of a process of using the eyebrow drawing as a system by comprehensively utilizing the eyebrow drawing, the facial features, and the superimposed display according to the embodiment of the present invention. is there.

FIG. 9 is a flowchart illustrating an example of a process in a case where the eyebrow drawing method of the present invention is applied to an instant photograph such as a photo print in the embodiment of the present invention.

FIG. 10 is an original face image before applying the eyebrow drawing method of the present invention in the embodiment of the present invention.

11 is an example of a face image when a new eyebrow is drawn on the face image of FIG. 10 using the eyebrow drawing method of the present invention in the embodiment of the present invention.

12 is an example of a face image when new eyebrows are drawn on the face image of FIG. 10 using the eyebrow drawing method of the present invention in the embodiment of the present invention.

Claims (3)

[Claims] 1. A method of drawing an eyebrow using a computer device, wherein (1) means for setting an eyebrow drawing area, and (2) means for setting a base position of eyebrows in the eyebrow drawing area by a mathematical expression including a random number. (3) eyebrow length / direction setting means for calculating the length and direction of the eyebrows from a formula including a base position of the eyebrows and a random number, and (4) eyebrow density obtained by the eyebrow length / direction calculation means. Eyebrow darkness setting means for calculating based on the eyebrow root position and the distance from the eyebrow root, and means for drawing individual eyebrows based on the numerical values obtained by (5) above. Eyebrow drawing method. 2. A method for drawing an eyebrow using a computer device, comprising: (1) means for setting an eyebrow drawing area; and (2) means for setting a base position of eyebrows in the eyebrow drawing area by a mathematical expression including a random number. (3) eyebrow length / direction setting means for calculating the length and direction of the eyebrows from a formula including a base position of the eyebrows and a random number, and (4) eyebrow density obtained by the eyebrow length / direction calculation means. Eyebrow density setting means for calculating based on the eyebrow root position and the distance from the eyebrow root, (5) an eyebrow drawing method comprising means for drawing individual eyebrows based on the numerical values obtained by the above means Recording medium for computer on which is recorded. 3. An apparatus for drawing eyebrows using a computer device, wherein (1) means for setting an eyebrow drawing area, and (2) means for setting a base position of eyebrows in the eyebrow drawing area by a mathematical expression including a random number. (3) eyebrow length / direction setting means for calculating the length and direction of the eyebrows from a formula including a base position of the eyebrows and a random number, and (4) eyebrow density obtained by the eyebrow length / direction calculation means. Eyebrow darkness setting means for calculating based on the eyebrow root position and the distance from the eyebrow root, and means for drawing individual eyebrows based on the numerical values obtained by (5) above. Eyebrow drawing device.