JP4666431B2 - Brush-tone hairline pattern creation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for creating a hairline pattern, particularly a brush-tone hairline pattern.
[0002]
[Prior art and problems to be solved by the invention]
The hairline pattern is widely used for printing or embossing building materials such as wallpaper and flooring, but one of the hairline patterns is a brush-tone hairline pattern. . In this specification, the brush-tone hairline pattern refers to a hairline pattern having a scar-like pattern that is formed when a smooth surface is rubbed in various directions using a brush, sandpaper, or the like. FIG. 9 shows an enlarged example of a brush-tone hairline pattern.
The brush-tone hairline pattern as shown in FIG. 9 can be widely used for building material printing or embossing, but it is particularly used when printing on a melamine decorative board to express a metallic texture. And suitable.
[0003]
Conventionally, the creation of a brush-like hairline pattern has been performed manually by a designer by scratching a member having a thin film thickness and a smooth surface with sandpaper or a metal brush.
[0004]
However, the conventional manual method described above cannot stably and clearly create a brush-tone hairline pattern. Moreover, not only is it difficult to correct when a work mistake occurs, but it is also difficult to design with variations.
[0005]
Therefore, the present invention can automatically create a stable and clear brush-tone hairline pattern, and can easily produce a design with variations. Brush-tone hairline pattern creation device Is intended to provide.
[0006]
[Means for Solving the Problems]
To achieve the above objective In addition, the brush-tone hairline pattern creation device according to the present invention includes Based on the input parameter value, an arrangement position determining means for determining an arrangement position for arranging the block pattern and an arrangement angle at each arrangement position by the number determined by the parameter value, and a radius determined by the parameter value, respectively. , Arcs having a length and a central angle are taken as concentric circles around the virtual origin as hairlines determined by the input parameter values, and a predetermined number of control points are taken on those hairlines, Obtain the coordinate values of those control points and create vector format data for one block pattern for the number of block patterns determined by the input parameter values, and then generate vector formats for all block patterns. Block pattern creating means for creating the data of the block, and the block pattern Block pattern placement means for converting the coordinate values of all control points of the vector format data for each block pattern created by the screen creation means based on the corresponding placement position and the placement angle at the placement position. At least prepare It is characterized by .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the invention will be described with reference to the drawings. Prior to the description of the embodiments, it is necessary to understand the following description. , How to create a brush-tone hairline pattern Explain the basic concept of.
[0008]
For example, when considering a scar formed when a smooth surface is rubbed only once with a brush, the scar has a plurality of orientations, positions, and central angles relatively aligned as shown in FIG. It can be considered that arcs are arranged. This is a pattern called a brush tone. Each arc can be considered as a hairline. Therefore, in the present specification, as shown in FIG. 1, a pattern in which a plurality of hairlines having relatively uniform orientations, positions, and central angles are arranged is referred to as a block pattern. As will be described below, in this embodiment, the length, radius, and center angle of each hairline constituting one block pattern are different, but all hairlines are arranged concentrically. .
Therefore, a large number of block patterns are created, and these block patterns are arranged at appropriate angles at appropriate positions in the created image. That is, each block pattern can be said to be a part for creating a brush-tone hairline pattern.
[0009]
FIG. 2 is a diagram partially showing an example in which a plurality of block patterns are arranged on the created image in this way. By such processing, a brush-tone hairline pattern as shown in FIG. 9 is created. Note that the position of each block pattern at which position on the created image and at what angle will be described later. In addition, as shown in FIG. 2, when the block pattern is arranged on the created image, the hair lines of the block patterns arranged at adjacent positions are allowed to overlap.
[0010]
Now, FIG. 3 shows an embodiment of a brush-tone hairline pattern creation device according to the present invention. In FIG. 3, 1 is an input means, 2 is an arrangement position determination means, 3 is a block pattern creation means, 4 is a block pattern arrangement means, and 5 is a raster image processor (RIP).
[0011]
The brush-tone hairline pattern creation device shown in FIG. 3 can be configured by a computer system. That is, the input unit 1 can be composed of an input device composed of a keyboard and a pointing device, a control unit composed of a CPU, and a GUI (Graphical User Interface) using a monitor, an arrangement position determining unit 2, a block pattern creating unit 3 And the block pattern arrangement | positioning means 4 can be comprised by mounting the software which performs the process demonstrated below on a control apparatus. RIP5 can also use a general RIP. However, in order to generate a smooth curve by spline interpolation based on data expressed in a vector format as will be described later and to convert it into raster data, in particular, It is desirable to use the RIP disclosed in Japanese Patent Laid-Open No. 2000-57358 previously proposed by the present applicant.
[0012]
[Overview of each component]
First, the outline of each part of the components shown in FIG. 3 will be described.
[0013]
(1) Input means 1
The input means 1 is for inputting values of various parameters for creating a brush-tone hairline pattern.
Here, at least the following parameter values are input.
-Created image size (x-direction size: xsize, y-direction size: ysize)
・ Number of block patterns (nb)
・ Number of hairlines in block pattern (maximum value nhlmax, minimum value nhlmin)
-Hairline spacing in the block pattern (maximum value dmax, minimum value dmin)
・ Hairline radius (maximum value rmax, minimum value rmin)
・ Hairline length (maximum value lhlmax, minimum value lhlmin)
[0014]
The meaning of these parameters is as follows.
The created image size is the size of the brush-tone hairline pattern to be created, and the value of the size xsize in the x direction and the value of the size ysize in the y direction are input. In the following description, as shown in FIG. 4, the position in the region of the created image is an orthogonal coordinate system in which the lower left corner of the created image is the origin O, the horizontal direction is the x axis, and the vertical direction is the y axis. It will be expressed by
[0015]
The number of block patterns is a parameter that determines the number of block patterns arranged on the created image, and the number nb is input. In this embodiment, the number of block patterns is input, but the density ρ (unit: pieces / mm ² ) And xsize and ysize in mm
nb = [ρ × xsize × ysize] (1)
Thus, the number nb of block patterns arranged on the created image may be obtained. In Equation (1), [] indicates a Gaussian symbol. That is, [a] is the maximum integer that does not exceed a.
[0016]
The number of hairlines in the block pattern is a parameter for determining the number of hairlines arranged in one block pattern, and the maximum value nhlmax and the minimum value nhlmin of the number are input.
[0017]
The hairline interval in the block pattern is a parameter for determining the interval between adjacent hairlines in a plurality of hairlines arranged in one block pattern, and the maximum value dmax and the minimum value dmin are input. In the following, the first hairline, the second hairline,... From the innermost hairline are referred to, and the interval between the kth hairline and the (k + 1) th hairline is referred to as the kth interval. The kth interval is dk.
[0018]
The hairline radius is a parameter for determining the radius of each hairline arranged in the block pattern, and the maximum value rmax and the minimum value rmin are input.
[0019]
The hairline length is a parameter for determining the length of each hairline arranged in the block pattern, and the maximum value lhlmax and the minimum value lhlmin are input.
The parameters other than the above parameters will be described each time.
[0020]
(2) Arrangement position determination means 2
Based on the parameters input by the input unit 1, the arrangement position determination unit 2 arranges the block pattern created by the block pattern creation unit 3, which will be described later, at which position on the created image and at what angle. The arrangement position and the arrangement angle at each arrangement position are determined.
Then, the arrangement position determination means 2 gives serial numbers to the determined arrangement positions in the order of coordinate values, and notifies the block pattern arrangement means 4 of the coordinates of the determined arrangement positions and the arrangement angles at the respective arrangement positions.
In addition, although how to assign the serial number with respect to the coordinate value order is arbitrary, for example, the numbers may be assigned in the order from the smallest y coordinate value of the arrangement position to the smallest x coordinate value.
[0021]
(3) Block pattern creation means 3
The block pattern creation means 3 creates nb block patterns based on the parameters input by the input means 1. There are various methods for expressing each created hairline. For example, a block pattern can be represented by raster data, or an arc representing a hairline can be represented by a mathematical expression. Defines a predetermined number of control points on the generated hairline and expresses them by the coordinates of those control points. That is, one hairline is expressed in a vector format composed of a coordinate value sequence of a predetermined number of control points.
Then, the block pattern creating means 3 gives serial numbers from No. 1 to nb in an appropriate order, for example, the order of creation to the created block patterns, and notifies the block pattern arranging means 4 of the numbers. The data structure of each block pattern at this time is as shown in FIG. 5, for example. FIG. 5 shows an example of vector format data for the k-th block pattern, and it is assumed that n hairlines are arranged in the block pattern. This data describes that there are m control points on each hairline, and further, the coordinate values of m control points taken on each hairline are written.
However, as will be described later, the coordinate value of the control point of each hairline of each block pattern created by the block pattern creating means 3 is not the coordinate value on the created image, but relative to the origin of the virtual center position of each block pattern Coordinate value.
[0022]
(4) Block pattern placement means 4
The block pattern placement unit 4 assigns the block pattern notified from the block pattern creation unit 3 to the placement position notified from the placement position determination unit 2 at the placement angle specified by the placement position, and the block number and the block of the placement position. The pattern numbers are assigned and assigned to each other, but what is actually performed is the process of converting the coordinate values of the control points. This will be described later.
[0023]
(5) RIP5
The data of the brush-tone hairline pattern is produced by the processing of the block pattern arrangement means 4, but in this embodiment, since the data is expressed in a vector format, in order to create a printing plate or an embossed plate Needs to be converted to a raster image. Therefore, RIP5 is provided.
RIP5 is not the essence of the present invention, and a general RIP can be used as long as it can develop a raster image based on vector format data, and is disclosed in JP-A-2000-57358 in particular. It is desirable to use RIP. If RIP disclosed in Japanese Patent Laid-Open No. 2000-57358 is used, vector format data can be developed into a raster image, and additional representation such as width can be performed.
[0024]
[Description of operation]
Next, the operation of the brush-tone hairline pattern creation device shown in FIG. 3 will be described.
First, the operator inputs at least the above-described parameter values by the input unit 1.
The parameter value input from the input unit 1 is notified to the arrangement position determination unit 2 and the block pattern creation unit 3.
When receiving the parameter value from the input means 1, the arrangement position determining means 2 starts the arrangement position determining process, and the block pattern creating means 3 starts the block pattern creating process.
[0025]
(1) Operation of arrangement position determining means 2
First, the arrangement position determining process in the arrangement position determining means 2 is as follows.
The arrangement position determination means 2 determines nb positions (arrangement positions) (cx, cy) where the designated nb block patterns are arranged, and at what angle the block pattern is arranged at each arrangement position. The arrangement angle φ is determined. The coordinate value of the arrangement position determined here is a coordinate value on the created image.
[0026]
There are the following two methods for determining the arrangement position, and either method may be used.
One method is a method of determining by using a designated created image size xsize, ysize and a random number. In this method, the x-coordinate value cxk and the y-coordinate value cyk of the kth arrangement position are respectively expressed by the following equations. Ask.
cxk = xsize xRND (2)
cyk = ysize × RND (3)
Here, RND is a random number uniformly distributed in the range of 0-1. The same applies to this point.
[0027]
However, in this method, since the arrangement position is determined at random, the arrangement position may be coarse and dense on the created image.
The other method is a method for avoiding the occurrence of density of arrangement positions in this way. First, nb arrangement positions are provisionally arranged regularly in the form of lattice points on the created image, and then the arrangement positions are changed. A random number is used to slightly shift in the x direction and / or y direction within a certain range. According to this method, there is no regular unnaturalness in the arrangement position, and it is possible to prevent the arrangement position from being rough on the created image.
[0028]
Further, the arrangement position determining means 2 determines the arrangement angle φk at the kth arrangement position by the following equation.
φk = 2π × RND (4)
In (4), the arrangement angle is distributed in the range of 0 to 2π (rad), so there is no restriction on the arrangement angle, but if you want to limit the arrangement angle, 2π in (4) Any value may be used to limit the value of. For example, if you want to limit the arrangement angle only within the range of 0 to π (rad),
φk = π × RND (5)
The arrangement angle may be determined by. As described above, there may be a restriction on the arrangement angle.
[0029]
When the nb arrangement positions and the arrangement angles at the respective arrangement positions are determined in this way, the arrangement position determining means 2 sets the determined arrangement positions and arrangement angles as one set, assigns serial numbers, and assigns block pattern arrangement means. 4 is notified. The serial numbering method is as described above.
[0030]
(2) Operation of block pattern creation means 3
The block pattern creation means 3 creates nb block patterns designated based on the input parameter values.
First, a method of creating a block pattern will be conceptually described. When a certain block pattern is created, it is determined how many hairlines are arranged in the block pattern and how the length and radius of each hairline are to be arranged.
[0031]
The number nhl of hairlines to be arranged is determined by the following formula.
nhl = nhlmin + RND × (nhlmax−nhlmin) (6)
Further, the length lhl of each of the nhl hairlines is determined by the following formula.
lhl = lhlmin + RND × (lhlmax−lhlmin) (7)
Furthermore, the radius r1 of the first hairline is
r1 = rmin + RND × (rmax−rmin) (8)
Ask for.
[0032]
As described above, the block pattern is created by arranging a plurality of hairlines, that is, arcs concentrically, but the block pattern creation means 3 sets the distance dk between the kth hairline and the (k + 1) th hairline as follows: Determine by formula.
dk = dmin + RND × (dmax−dmin) (9)
And the radius ri of the i-th hairline after the second (i = 2,3, ..., nhl)
ri = r1 + Σd (10)
Here, Σd is the total sum from d1 to d (i-1). Therefore, the radius of the second hairline is r2 = r1 + d1, and the radius of the third hairline is r3 = r1 + d1 + d2. The same applies to the radii of the fourth and subsequent hairlines.
[0033]
Therefore, the center angle of the arc necessary for creating each hairline is uniquely determined from the length lhlk and the radius r of each hairline. If the length of the k-th hairline is lhlk and the radius is rk, its central angle θk is
θk = lhlk / rk (11)
It becomes.
[0034]
Each hairline can be created from the above values. Here, the virtual origin O ′ is taken at an appropriate position, and the horizontal direction is set with respect to the virtual origin O ′ as shown in FIG. An orthogonal coordinate system is defined with the x axis and the vertical direction as the y axis. Then, the hairline is created symmetrically with respect to the x axis or the y axis with the virtual origin O ′ as the center. Here, assuming that the hairline is created symmetrically with respect to the y-axis, the k-th hairline of the block pattern is as shown in FIG. As is clear from the above description, it is clear that the hairline numbers are first, second,... From the closest to the virtual origin O ′. In FIG. 6B, the length of the hairline is lhlk, the radius is rk, and the central angle is θk, which are determined as described above.
[0035]
And a control point is taken on the said hairline. The number of control points may be registered in advance in the block pattern creation means 3 or may be input as a parameter from the input means 1. Here, it is assumed that the number of control points is ncp.
[0036]
For taking control points on the hairline, the first control point is taken at one end of the hairline and the remaining (ncp-1) control points are taken from there to the other end. Here, the position where the x-coordinate value of the hairline is the maximum, that is, in the case of FIG. 6B, the first control point is taken at the right end of the hairline, and the smaller one of the x-coordinate values, FIG. In this case, the control points are taken in order, such as the second control point and the third control point, toward the left side. Accordingly, the central angle between two adjacent control points on the hairline is θ / (ncp−1).
Therefore, the x-coordinate value and y-coordinate value of each control point can be easily determined geometrically. The x-coordinate value xkj and y-coordinate value of the j-th control point of the k-th hairline are ykj, respectively, as follows: become.
xkj = rk * cos {[theta] k / 2- (j-1) * [theta] k / (ncp-1)} (12)
ykj = rk * sin {[theta] k / 2- (j-1) * [theta] k / (ncp-1)} (13)
Here, rk is the radius of the kth hairline, and θk is the central angle of the kth hairline.
[0037]
In this way, vector format data consisting of a coordinate value sequence of ncp control points on the kth hairline is obtained. The coordinate values of these control points are orthogonal coordinate values defined with respect to the virtual origin O ′, and are independent of the coordinate values on the created image. Therefore, the coordinate value of the control point at this time can be said to be a virtual coordinate value.
[0038]
If the above processing is performed on all the hairlines of the block pattern, data in the vector format as shown in FIG. 5 is obtained for the block pattern.
[0039]
When vector format data is obtained for one block pattern, the block pattern creation means 3 then translates the position of the virtual origin O ′ to the approximate center position of the hairline group arranged in the block pattern. To do. This is because, as will be described later, when a block pattern is assigned to an arrangement position of a corresponding number on the created image determined by the arrangement position determination means 2, which position of the block pattern coincides with the arrangement position Of course, it is possible to arrange the virtual origin O ′ so as to coincide with the corresponding arrangement position, but when the radius of the hairline is large, the hairline is separated from the arrangement position. This is not desirable. Therefore, the virtual origin is moved to a dense position of the hairline in the block pattern.
[0040]
The position of the destination of the virtual origin need not be exactly the center of the hairline group arranged in a block pattern. Therefore, for example, when the number of hairlines is odd, the middle hairline, that is, when the number of hairlines is (2m-1) (where m is a natural number), the mth hairline moves to a position on the y-axis. If the hairline is an even number 2m, move to the position on the y-axis of the (m−1) th or (m + 1) th hairline to make a new virtual origin O ″. Good. Therefore, when a certain block pattern is composed of three hairlines as shown in FIG. 7, the position on the y-axis of the second hairline which is the middle hairline is set as a new virtual origin O ″.
[0041]
With this process, the coordinate value of the control point on the hairline that constitutes the block pattern is the same as the x coordinate value, and the y coordinate value is Δ
ykj = rk * sin {[theta] k / 2- (j-1) * [theta] k / (ncp-1)}-[Delta] (14)
It becomes.
[0042]
And the coordinate value of the control point on each hairline can be determined about all the block patterns by performing said process about all the block patterns.
[0043]
Although the coordinate values of the control points can be determined by the equations (12) and (14), if the raster image is formed based on the coordinate value sequence of the control points determined as described above, the block pattern The centers of the individual hairlines are arranged in a straight line, which may give an unnatural impression. Therefore, by giving fluctuation to the control point and giving the hairline an appropriate phase difference, it is possible to avoid such an unnatural impression as described above. For that purpose, for example, the coordinate value of the control point may be given fluctuation by the following equation.
xkj = rk * cos {[theta] k / 2- (j-1) * [theta] k / (ncp-1) + [phi]} (15)
ykj = rk * sin {[theta] k / 2- (j-1) * [theta] k / (ncp-1) + [phi]}-[Delta] (16)
Here, ψ is a function that takes a value in a predetermined angle range by a random number.
The process of giving fluctuations to the coordinate values of the control points is not indispensable and may be performed as necessary.
[0044]
As described above, the process of creating the block pattern has been conceptually described. However, as can be easily understood from the above description, the block pattern creating means 3 is actually the hairline arranged in the block pattern by the expression (6). The number nhl is determined, the length lhl of each hairline is determined by equation (7), the radius r of each hairline is determined by equations (8) to (10), and the center angle of each hairline is determined by equation (11) θ is determined, and the process of obtaining the coordinate value of each control point of each hairline according to the equations (12) and (14) is executed for all the block patterns. In order to give fluctuation to the coordinate value of the control point, the calculations of the equations (15) and (16) are performed.
[0045]
As described above, when vector format data is created for all the block patterns, the block pattern creation means 3 passes it to the block pattern placement means 4.
[0046]
In the above description, the hairline in the block pattern is created symmetrically with respect to the y axis of the orthogonal coordinate system centered on the virtual origin O ′. However, it is also possible to create the hairline symmetrically with respect to the x axis. In this case, the coordinate value of each control point can be easily obtained geometrically.
[0047]
(4) Operation of block pattern placement means 4
The block pattern placement unit 4 has a vector format for each block pattern received from the block pattern creation unit 3 at the placement position of each block pattern received from the placement position determination unit 2 at an angle specified for the placement position. A process of assigning and arranging data in association with numbers is performed. As will be described later, this process is nothing but coordinate conversion with respect to the coordinate value of the control point.
[0048]
Assume that the kth block pattern is arranged at the kth arrangement position. It is assumed that the coordinate value of the kth arrangement position, that is, the coordinate position on the created image is (cxk, cyk), and the arrangement angle at the arrangement position is φk.
[0049]
First, the block pattern arrangement unit 4 performs a rotation process on the coordinate values of all control points for the k-th block pattern by the arrangement angle θk with the virtual origin O ″ as the center. As shown in Fig. 8, this can be done by applying a matrix of 2 rows and 2 columns determined by the rotation angle θk to the coordinate values (xkj, ykj) of each control point. FIG. 8A shows a state where the block pattern shown in FIG. 8A is rotated by an angle θk around the virtual origin O ″ as shown in FIG. 8B.
[0050]
When the rotation process is performed in this way, the block pattern arrangement unit 4 next moves the virtual origin O ″ of the rotation process to the coordinate value (cxk, cyk) of the arrangement position. This can be done by adding cxk to the x coordinate value of each control point and adding cyk to the y coordinate value, so that the original coordinate value of the control point is (xkj, ykj). Assuming that the coordinate value resulting from the rotation by the arrangement angle θk is (x′kj, y′kj), the final coordinate value of the control point obtained by the subsequent translation is (x′kj + cxk, y). ′ Kj + cyk) Thus, the coordinate value of the control point corresponds to the coordinate value on the created image, that is, the virtual origin O ″ of the block pattern is matched with the arrangement position, and is displayed on the created image. Assigned and placed The
[0051]
The block pattern arrangement unit 4 executes the above processing for all arrangement positions. As a result, all the block patterns are arranged at the designated arrangement angles at the arrangement positions determined on the created image.
[0052]
By the above processing, data of a brush-tone hairline pattern is created. Thereafter, when it is desired to form a raster image, the data of the brush-tone hairline pattern created by the block pattern arranging means 4 may be given to the RIP 5. As described above, RIP5 is not the essence of the present invention, and a known one disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-57358 may be used.
[0053]
As above, According to this brush-tone hairline pattern creation device A brush-tone hairline pattern can be automatically created simply by inputting a predetermined parameter value, and a design with variations can be facilitated by the input parameter value.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a block pattern;
FIG. 2 is a diagram partially showing an example in which a plurality of block patterns are arranged on a created image.
FIG. 3 is a diagram showing an embodiment of a brush-tone hairline pattern creation device according to the present invention.
FIG. 4 is a diagram for explaining that a position in a region of a created image is represented by an orthogonal coordinate system in which a lower left corner of the created image is an origin O, a horizontal direction is an x axis, and a vertical direction is a y axis. .
FIG. 5 is a diagram illustrating an example of a data structure of each block pattern.
FIG. 6 is a diagram for conceptually explaining the operation of the block pattern creating means 3;
FIG. 7 conceptually illustrates a process of translating a virtual origin O ′ used for creating each hairline to a substantially central position of a group of hairlines arranged in a block pattern in the block pattern creating unit 3; FIG.
FIG. 8 is a diagram conceptually illustrating a process in the block pattern placement unit 4 that rotates the coordinate values of all control points for a block pattern by a placement angle around a virtual origin O ″.
FIG. 9 is a diagram illustrating an example of a brush-tone hairline pattern.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Input means, 2 ... Arrangement position determination means, 3 ... Block pattern creation means, 4 ... Block pattern arrangement means, 5 Raster image processor (RIP).

Claims (1)

An arrangement position determining means for determining an arrangement position for arranging the block pattern and an arrangement angle at each arrangement position by the number determined by the parameter value based on the input parameter value;
Arcs having radii, lengths, and central angles determined by the parameter values are taken as concentric circles centered on the virtual origin, and as many hairlines as determined by the input parameter values. Taking the number of control points, obtaining the coordinate values of those control points and creating vector format data for one block pattern, for the number of block patterns determined by the input parameter value, Block pattern creation means for creating vector format data for all block patterns;
Block pattern placement means for converting the coordinate values of all control points of the vector format data for each block pattern created by the block pattern creation means based on the corresponding placement position and the placement angle at the placement position And a brush-tone hairline pattern creation device.

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