JP4737358B2 - Emboss pattern creation method, emboss pattern creation device, and decorative sheet creation method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for creating an emboss pattern used for embossing a resin sheet, a creation apparatus thereof, as well as To make embossed decorative sheet To the law Related.
[0002]
[Prior art]
Conventionally, a decorative sheet obtained by embossing a resin sheet (hereinafter simply referred to as a resin sheet) on which a plain or appropriate pattern is printed has been widely known. Such decorative sheets are used for various applications such as interior materials.
[0003]
By the way, there are various patterns for embossing the resin sheet. Among them, there is a pattern generally called a satin finish. FIG. 10 shows an enlarged view of an example of a satin finish pattern. As shown in FIG. 10, the satin finish pattern can be called a pattern in which black spots are scattered on a white background. Of course, black spots may exist uniformly throughout the entire image, but as shown in FIG. 10, even if there are spots where black spots are concentrated locally or there are no black spots. It ’s good.
[0004]
Accordingly, a decorative sheet having a satin finish surface shape can be created by creating a satin finish pattern, creating an embossed plate based on the satin finish pattern, and embossing the resin sheet. A small unevenness is formed on the surface of the decorative sheet prepared in this way, and the appearance of the unevenness is similar to the state of the cut surface of the pear, so it is called a satin finish.
[0005]
Here, it is as follows to make a note about the creation of the pear-tone pattern.
The pear-tone pattern can be created using commercially available image creation application software. That is, the image shown in FIG. 10 can also be referred to as a noise image from another viewpoint, and therefore, a satin pattern can be created by using software capable of generating a noise image. The pear-tone pattern is finally a binary image, but if the noise image that can be created by application software has multiple gradations, an appropriate threshold is set for the created noise image. A binarization process may be performed.
[0006]
It is also possible for the present applicant to create a satin pattern using the methods disclosed in, for example, Japanese Patent Application Laid-Open Nos. 11-149561 and 2000-218719. That is, a fractal two-dimensional scalar field is generated by a known method such as a midpoint displacement method, or a non-fractal multi-tone two-dimensional scalar field is generated by the method described in the above publication, and the two-dimensional scalar field is generated. 10 is created by binarizing the value of each pixel with an appropriate threshold value, and imaging a pixel having a value of 0 as white and a pixel having a value of 1 as black, a pattern as shown in FIG. 10 can be created. . In particular, according to the method disclosed in JP-A-11-149561, the power spectrum of fluctuation can be controlled as desired.
[0007]
Hereinafter, a method for generating a non-fractal two-dimensional scalar field disclosed in Japanese Patent Application Laid-Open No. 11-149561 will be outlined.
First, a sequence of fluctuation width Z composed of the following scalar values is defined.
Z ₂₀ , Z _{twenty one} , ..., Z _2m , ... (1)
Here, the value of each fluctuation width can be arbitrarily determined. This sequence includes a scalar value given to a lattice point defined in the 0th stage, a scalar value used as a fluctuation width used for calculating a scalar value given to the grid point defined in the 1st stage,. This is a sequence consisting of scalar values that are the fluctuation widths used to calculate the scalar values given to the grid points defined in.
[0008]
Accordingly, if the grid points A, B, C, and D are defined at the four vertices of the square as shown in FIG. 11 in the 0th stage, for example, the scalar value Z of the first term of the above sequence is included in the grid point A, for example. ₂₀ (A in FIG. 11) is given, and the lattice point B has a scalar value Z of the second term in the above sequence. _{twenty one} (B in FIG. 11) is given, and the lattice point C has a scalar value Z of the third term in the above sequence. _{twenty two} (C in FIG. 11) is given, and the lattice point D has a scalar value Z of the fourth term in the above sequence. _{twenty three} (D in FIG. 11) is given.
[0009]
Next, as shown in FIG. 12, as the first stage, lattice points E, F, G, and H are defined at the midpoints between lattice points AB, BC, CD, and DA, and four lattice points are defined. Another first-stage grid point I is defined at the intersection of two diagonal lines of the point ABCD, and scalar values are calculated for these grid points E to I. In this case, the scalar values of the fifth to ninth terms in the above sequence are given as fluctuation widths, and calculation is performed according to the following equation.
[0010]
e = (Z ₂₀ + Z _{twenty one} ) / 2 + Z _{twenty four} ・ RND (2)
f = (Z _{twenty one} + Z _{twenty two} ) / 2 + Z _{twenty five} ・ RND (3)
g = (Z _{twenty two} + Z _{twenty three} ) / 2 + Z ₂₆ ・ RND (4)
h = (Z _{twenty three} + Z ₂₀ ) / 2 + Z ₂₇ ・ RND (5)
i = (Z ₂₀ + Z _{twenty one} + Z _{twenty two} + Z _{twenty three} ) / 4 + Z ₂₈ ・ RND (6)
Here, RND is a random number. A random number having an appropriate distribution, for example, a random number in a range of −1 ≦ RND ≦ + 1 may be used.
[0011]
Hereinafter, if calculation is performed from the second stage to the n-th stage in the same manner, a non-fractal two-dimensional scalar field having desired characteristics can be generated. Naturally, the scalar value of each term in the above sequence is set to a value that provides a scalar field having a desired characteristic.
[0012]
In addition, when a plurality of grid points are defined at a certain stage, scalar values corresponding to the number of grid points defined at the stage are used as fluctuation widths from the above sequence. The order in which the scalar values correspond to which lattice points may be determined in advance.
[0013]
As described above, in the conventionally used midpoint displacement method, the fluctuation width when calculating the scalar value of the lattice point defined after the first stage is automatically determined by the maximum half amplitude value. On the other hand, according to this non-fractal scalar field generation method, the fluctuation width in calculating the scalar value of each lattice point defined after the first stage can be arbitrarily determined. A non-fractal scalar field with characteristics can be generated.
[0014]
For example, an appropriate scalar value is given to the lattice point defined first in the 0th stage, and the scalar value that becomes the fluctuation width used when calculating the scalar value given to the grid point defined in the 1st stage is Arbitrary value α is given, and α / 3 is given as a scalar value as a fluctuation width used when calculating the scalar value to be given to the lattice point defined in the second stage, and the lattice point defined in the third stage is given to As a scalar value that becomes a fluctuation width used when calculating a given scalar value, α / n ⁿ As shown in FIG. 13B, it is possible to generate a scalar field having characteristics in which the fluctuation power rapidly decreases as the spatial frequency increases.
[0015]
In addition, the fluctuation width used when calculating the scalar value given to the grid points defined in the first stage to the i-th stage is 0, and the scalar value given to the grid points defined in the (i + 1) th stage and after is calculated. If an appropriate value other than 0 is given as the fluctuation width used in this case, a scalar field having characteristics as shown in FIG.
[0016]
In FIG. 13, the horizontal axis indicates the spatial frequency f, and the vertical axis indicates the power of fluctuation. Further, what is indicated by a in FIG. 13 is a characteristic of a fractal scalar field generated by the midpoint displacement method, which is a hyperbolic curve. Therefore, what is shown in FIG. ⁿ The fluctuation power spectrum of the fractal scalar field expressed by On the other hand, as shown in FIG. 13B, the characteristic that the power spectrum of fluctuation rapidly decreases as the spatial frequency f increases, and as shown in FIG. The characteristic that fluctuation power is 0 is 1 / f ⁿ It is a scalar field that can not be expressed in, and a non-fractal scalar field.
[0017]
[Problems to be solved by the invention]
By the way, it is known that a decorative sheet having a satin-like surface shape has a matte effect, but since each convex portion formed on the decorative sheet is substantially hemispherical, if viewed macroscopically The gloss of the decorative sheet is uniform over the entire surface when viewed from any direction. That is, it can be said that the decorative sheet having a satin-like surface shape has no gloss directionality.
[0018]
On the other hand, there is also known a decorative sheet in which a glossy portion, that is, a portion that appears bright and bright, changes depending on the relationship between the direction of light rays and the direction of line of sight. Such a decorative sheet can be produced, for example, by embossing using a pattern referred to as corrugation. As shown in FIG. 14, the engraved pattern is obtained by dividing the image size to be created into closed regions of appropriate shapes and drawing parallel stripes at appropriate angles and appropriate intervals in the closed regions. . Then, an embossed plate is created on the basis of such a corrugated pattern, and a decorative sheet is created by embossing the resin sheet.
[0019]
In such a decorative sheet, a glossy area and a dull area, that is, a brightly shining area and a darkly appearing area are generated depending on the direction of light rays, the direction of line of sight, and the angle of the embossed stripe. Thus, there is a gloss difference when there is a glossy region and a non-glossy region.
[0020]
In other words, the decorative sheet embossed with a corrugated pattern has a gloss difference depending on the region, and this gloss difference changes depending on the lighting environment and the viewing angle. The design effect that the difference is changed is obtained.
However, the decorative sheet embossed with a corrugated pattern has a problem that the reflection of light is very strong, so that the so-called glare is strong.
[0021]
Therefore, the present invention provides an embossing pattern creating method that can provide a matte feeling of a decorative sheet having a satin-like surface shape and that can create a decorative sheet that has a gloss difference and that changes depending on the direction in which the gloss difference is seen. , And an embossing pattern creating device, and a cosmetic sheet having such an effect To The object is to provide a creation method.
[0022]
[Means for Solving the Problems]
In order to achieve the above object, an emboss pattern creating method according to the present invention includes a step of inputting a mask image in which a color number is defined for each pixel and a mask image as defined in claim 1. A predetermined parameter such as an allocation correspondence table in which at least two pear-tone patterns having directionality in different directions are associated with each other, a created image size, and the input parameter value Based on the above, the step of generating a satin-like pattern having no directionality and the satin-tone pattern having no directionality are scaled in different directions, respectively, to have at least two directions With reference to the process of creating the satin tone pattern and the allocation correspondence table, it is associated with the color number of the pixel on the mask image corresponding to the target pixel of the created image. A step of creating an embossed pattern by performing an operation for setting the value of the pixel corresponding to the target pixel of the pear-tone pattern having directionality as the value of the target pixel of the generated image for all the pixels of the generated image. It is characterized by providing.
The emboss pattern creating apparatus according to the present invention is different from the mask image input means for inputting a mask image in which a color number is defined for each pixel, and the color number defined in the mask image, as described in claim 2. Based on the input parameter value, the input means for inputting predetermined parameters such as an allocation correspondence table having at least two pear-tone patterns that have directionality in correspondence with the created image size, and the like. A satin tone pattern generating means for generating a satin tone pattern that does not have a pattern, and a satin tone pattern that does not have a directionality are scaled in different directions, respectively, so that at least two pear textures having a directionality are obtained. By referring to the scaling unit for creating the pattern and the allocation correspondence table, the color number of the pixel on the mask image corresponding to the target pixel of the created image is matched. The emboss pattern is created by performing the operation of setting the pixel value corresponding to the target pixel of the textured pattern having the attached directionality as the value of the target pixel of the created image for all the pixels of the created image. And image synthesizing means.
According to a third aspect of the present invention, there is provided a decorative sheet creating method, comprising: inputting a mask image in which a color number is determined for each pixel; A process of inputting predetermined parameters such as an allocation correspondence table in which at least two pear-tone patterns are associated, a created image size, and the like, and a directionality based on the input parameter value. A step of generating an unfinished satin pattern, a step of scaling the unfinished pear texture pattern in directions different from each other, and creating at least two directional pear texture patterns, and allocation By referring to the correspondence table, the present pattern of the satin tone pattern having the direction corresponding to the color number of the pixel on the mask image corresponding to the target pixel of the created image is displayed. An operation for setting the value of the pixel corresponding to the target pixel as the value of the target pixel of the created image is performed for all the pixels of the created image, and an embossed pattern is created based on the created embossed pattern. And a step of embossing the resin sheet with the created embossed plate.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the invention will be described with reference to the drawings. First, in order to facilitate understanding of the description of the following embodiments, the concept of a decorative sheet to be created will be briefly described.
[0024]
Now, as shown in FIG. 1, there are two regions A and B, and the convex portion formed in the region A is horizontally long, and the convex portion formed in the region B is vertically long. Note that it is not necessary for all the convex portions formed in the region A to be horizontally long, and it is sufficient that the horizontally long convex portions occupy a large number. Similarly, in the region B, the vertically long convex portions are numerically It only has to occupy the majority.
[0025]
Then, when light is illuminated from diagonally above in the direction of arrow C in the figure, it is assumed that the light is viewed from diagonally above in the direction of arrow D in the figure. Considering the reflected light in the line-of-sight direction from each convex part in this state, the amount of light reflected from the area A is the area B because the area facing the line-of-sight is larger in the horizontally long convex part than in the vertically long convex part. More than the amount of light reflected from. Therefore, in this case, the area A looks brighter than the area B. That is, a difference in gloss occurs between the region A and the region B.
[0026]
However, if the line of sight is changed to the arrow E in the figure while keeping the direction of illumination the same, the region B appears to be brighter than the region A for the same reason. In other words, the gloss difference is reversed by changing the direction of the line of sight.
[0027]
In this way, it is possible to create a decorative sheet that has a gloss difference by dividing the region and changing the direction of the convex portion formed in the adjacent region, and also changing the viewing direction. it can. And the matte feeling similar to a satin finish can be provided by making the length of a convex part into a certain range without lengthening too much.
[0028]
In this way, create a binary image in which a pattern with different orientations, a horizontally long pattern and a vertically long pattern, is divided into regions, create an embossed plate based on the image, and emboss the resin sheet It can be seen that a decorative sheet having a gloss difference and changing the viewing direction can be produced by changing the viewing direction.
[0029]
If this is generalized, it can be said that an embossed pattern is not limited to the vertical direction and the horizontal direction, and an embossed pattern may be obtained by dividing at least two patterns having different directions.
[0030]
The embossed pattern creating apparatus according to the present invention intends to create such an embossed pattern, and an embodiment will be described below.
[0031]
FIG. 2 is a view showing an embodiment of an emboss pattern creating apparatus according to the present invention. In the figure, 1 is an input means, 2 is a satin tone pattern generation means, 3 is a scaling means, 4 is a mask image input means, Reference numeral 5 denotes image composition means, and 6 denotes image output means.
[0032]
The emboss pattern forming apparatus shown in FIG. 2 can be configured by a computer system. In other words, the input unit 1 can be composed of a keyboard and a pointing device, and the satin tone pattern generation unit 2, the scaling unit 3, and the image composition unit 5 perform the processing described below on the control device including the CPU. It can be configured by installing software.
[0033]
First, each part of the emboss pattern creating apparatus shown in FIG.
The input means 1 is for inputting various parameter values for creating a target emboss pattern.
[0034]
The parameters input from the input unit 1 include the size of an image to be finally created (hereinafter referred to as a created image size) and its resolution. In addition, when a vertical pear tone pattern and a horizontal pear tone pattern, which will be described later, obtained by the scaling unit 3 are combined using a mask image, the vertical pear tone pattern is assigned to the created image, and the created image Input an allocation correspondence table that determines where the horizontal pear-tone pattern is allocated. This allocation correspondence table is given from the input means 1 to the image composition means 5.
[0035]
Further, if there is a parameter to be input for generating a satin tone pattern by the satin tone pattern generation means 2, it is input. For example, in the case of generating a satin tone pattern using the method for generating a non-fractal two-dimensional scalar field disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 11-149561, the fluctuation width Z as shown in the equation (1) Enter a number sequence. In addition, when a threshold value for binarization when generating a satin tone pattern is specified by a parameter, the threshold value is input. Here, it is assumed that the threshold value used for binarization is registered in the satin tone pattern generation unit 2 in advance.
[0036]
Furthermore, the scaling factor when scaling the satin tone pattern by the scaling unit 3 can be fixedly registered in the scaling unit 3, but the scaling factor is designated by a parameter. If so, enter the scaling factor. Here, it is assumed that the scaling factor when scaling the satin tone pattern with the scaling unit 3 is registered in the scaling unit 3 in advance.
[0037]
The satin tone pattern generation unit 2 generates a pear tone pattern with the created image size and resolution input by the input unit 1. As described above, the satin tone pattern generation means 2 first generates a noise image using software that can generate a commercially available noise image, and binarizes the value of each pixel of the noise image with an appropriate threshold value. Or a means for imaging, or a fractal two-dimensional scalar field is generated by a known method such as a midpoint displacement method, and the value of each pixel of the two-dimensional scalar field is set to 2 by an appropriate threshold value. It can also be constituted by means for digitizing and imaging, and a non-fractal two-dimensional scalar field is generated by the above-described method, and each pixel value of the two-dimensional scalar field is binarized by an appropriate threshold value. It can also be configured by imaging means, and any means may be used.
[0038]
The scaling unit 3 scales the satin tone pattern generated by the satin tone pattern generation unit 2 in the vertical direction and the horizontal direction at a preset scaling factor. The vertical scaling factor and the horizontal scaling factor can be arbitrarily determined, but here, both are set to three times.
[0039]
The scaling means 3 can produce two satin patterns, a satin pattern that has been scaled in the vertical direction at a predetermined magnification and a satin pattern that has been scaled in the horizontal direction at a predetermined ratio. In the present specification, the former is referred to as a vertical direction textured pattern, and the latter is referred to as a horizontal direction textured pattern.
[0040]
The mask image input means 4 is for inputting a mask image used for synthesizing the vertical direction textured pattern and the horizontal direction textured pattern. If the mask image data is stored in an appropriate storage medium such as a flexible disk, the mask image input means 4 can be configured by means for reading the mask image data from the storage medium. The mask image input means 4 can be constituted by means capable of capturing mask image data through communication with the computer system, or the mask image input means 4 can be used to display a line drawing. It can also be configured by software capable of drawing, and in this case, a desired mask image can be created by the emboss pattern creating apparatus.
[0041]
A color number is determined for each pixel of the mask image. In this embodiment, since two patterns of the vertical pear-tone pattern and the horizontal pear-tone pattern are synthesized, two color numbers may be set for each pixel of the mask image, but scaling is performed in M directions. In the case of synthesizing the finished satin pattern, there are M types of color numbers determined for each pixel of the mask image. For example, if a vertical satin pattern, a horizontal satin pattern, and three satin patterns scaled in a 45 ° direction are combined, three color numbers are required.
[0042]
The image synthesizing unit 5 assigns the vertical pear tone pattern and the horizontal pear tone pattern passed from the scaling unit 3 to the mask image data passed from the mask image input unit 4 and the assignment given from the input unit 1. An emboss pattern is created by combining based on the relationship table. The operation will be described later.
[0043]
The image output means 6 outputs the image data of the emboss pattern obtained by the image composition means 5, and can be constituted by a display device, a printer, a film output device, or an external storage device such as a hard disk device. . Of course, all of these may be provided as the image output means 6.
[0044]
[Description of operation]
The outline of each part of the emboss pattern creating apparatus shown in FIG. 2 has been described above. Next, the operation will be described together with the processing procedure of the emboss pattern creating method.
[Input parameters]
First, the operator inputs a predetermined parameter value by the input means 1. The parameters are as described above.
Here, it is assumed that the assignment correspondence table between the vertical pear tone pattern and the horizontal pear tone pattern is input as shown in FIG. As shown in FIG. 3, the allocation correspondence table is a table in which a color number determined for a pixel of a mask image is associated with a satin tone pattern that has been scaled by the scaling unit 3 and has directionality. According to the allocation correspondence table shown in FIG. 3, when the pixel number on the mask image corresponding to the pixel position on the created image is 1, the pixel position on the created image is When the pixel value at the position corresponding to the pixel position on the created image on the tone pattern is assigned and the color number of the corresponding pixel on the mask image is 2, the pixel position on the created image is A pixel value at a position corresponding to the pixel position on the created image on the direction pear tone pattern is assigned.
[0045]
[Input mask image data]
In addition, the operator inputs image data of a mask image to be used when the image composition unit 5 synthesizes the vertical direction textured pattern and the horizontal direction textured pattern by the mask image input unit 5. Although it is practically convenient that the size of the mask image is the same as the size of the created image, the size is arbitrary as long as there is a one-to-one correspondence between each pixel of the mask image and each pixel of the created image.
Here, assuming that the mask image is as shown in FIG. 4, the color number of each pixel in the area indicated by A in FIG. 4 is “1”, and the color number of each pixel in the area indicated by B is “2”. Shall be made.
[0046]
[Generation of pear-like pattern]
When the parameter value input from the input unit 1 is given, the satin tone pattern generation unit 2 generates a satin tone pattern having a specified resolution with a specified created image size based on the parameter value. Then, the generated image data of the satin pattern is transferred to the scaling unit 3. The pear-tone pattern generated here is as shown in FIG. 10 and is the same as the conventional pattern, and the pattern does not have directionality. Therefore, the decorative sheet embossed based on this pear-tone pattern is There is no directionality of gloss.
[0047]
[Variation]
The scaling unit 3 scales the pear-skin tone pattern given from the pear-skin tone pattern generation unit 2 with a scaling factor set in advance in each of the vertical direction and the horizontal direction, Two patterns of a satin tone pattern are generated. Then, the generated vertical pear tone pattern and horizontal pear tone pattern are given to the image composition means 5.
[0048]
An example of the vertical direction satin pattern is shown in FIG. 5, and an example of the horizontal direction texture pattern is shown in FIG. FIG. 5 shows a part of an enlarged view of the satin finish pattern shown in FIG. 10 that has been scaled three times in the vertical direction, and FIG. 6 shows that the satin finish pattern shown in FIG. 10 is scaled three times in the horizontal direction. A part of an enlarged view of the above is shown.
[0049]
For example, FIG. 7 (b) is a black circle shown in FIG. 7 (a) scaled by 3 times in the horizontal direction, and FIG. 7 (c) is a black circle shown in FIG. 7 (a) in the vertical direction. However, for this reason, in the image obtained by scaling the satin tone pattern shown in FIG. 10 in the horizontal direction, a large number of horizontally-long black approximately elliptical patterns occupy the vertical direction. It can be seen that in the image scaled to, a large number of vertically long black substantially oval patterns occupy. In fact, comparing FIG. 5, FIG. 6 and FIG. 10, it is clear that the pattern in FIG. 5 has a vertical directionality, and in the pattern in FIG. 6, the pattern has a horizontal directionality. Yes.
[0050]
[Image composition]
Image synthesizing means 5 is provided with a vertical pear tone pattern and a horizontal pear tone pattern from zooming means 3, mask image data from mask image input means 4, and an allocation correspondence table from input means 1. Start synthesis. The operation at this time will be described with reference to FIG.
[0051]
First, paying attention to one pixel P (x, y) on the created image, a pixel Q (x, y) on the mask image corresponding to the position (x, y) of the noted pixel P on the created image is obtained. Thus, the color number of the pixel Q is recognized.
[0052]
As described above, the size of the mask image may be arbitrary. Therefore, when the size of the mask image is different from the size of the created image, in order to obtain the pixel on the mask image corresponding to the pixel of interest P (x, y) on the created image, both sizes are normalized. Thus, pixel positions corresponding to one to one may be obtained. When obtaining the pixel of the vertical pear tone pattern corresponding to the pixel of interest P (x, y) on the created image and the pixel of the horizontal pear tone pattern corresponding to the pixel of interest P (x, y) on the created image The same applies to the case where it is required.
[0053]
Now, the pixel on the mask image corresponding to the pixel P on the created image in FIG. 8A is Q as shown in FIG. 8B, and the color number of the pixel Q is “1”. And In this case, the image synthesizing unit 5 refers to the allocation correspondence table and recognizes whether the pattern to be allocated to the pixel P on the created image is a vertical pear tone pattern or a horizontal pear tone pattern. According to FIG. 3, in this case, it is set for assigning a laterally textured pattern. Therefore, the image synthesizing unit 5 next obtains a pixel on the laterally textured pattern corresponding to the target pixel P on the created image. Assuming that the pixel is at the position indicated by S in FIG. 8D, the image composition means 5 takes in the value of the pixel S of the lateral pear tone pattern and sets it as the pixel value of the pixel of interest P on the created image. . Since the horizontal pear tone pattern is a binary image, the pixel value of the pixel of interest P is “0” or “1”.
[0054]
The same applies to the case where the color number of the pixel Q corresponding to the pixel of interest P on the mask image is “2”, and the image composition means 5 refers to the allocation correspondence table and the pixel P on the created image. Recognizing that the pattern to be assigned to is a vertical satin pattern, the pixel on the vertical satin pattern corresponding to the pixel of interest P on the created image is obtained. Assuming that the pixel is at the position indicated by R in FIG. 8C, the image synthesizing unit 5 takes in the value of the pixel R of the vertical pear tone pattern and sets it as the pixel value of the pixel of interest P on the created image. . Since the vertical pear tone pattern is a binary image, the pixel value of the pixel of interest P is also “0” or “1”.
[0055]
The above operation is performed for all the pixels of the created image. This makes it possible to create an emboss pattern having a target area in which a horizontally long picture occupies a large number and a vertical area in which a large number of pictures occupy a large number. An example of the emboss pattern is shown in FIG. In FIG. 9, a pattern of a horizontal satin pattern is assigned to the area indicated by A in FIG. 4, and a pattern of a vertical satin pattern is assigned to the area indicated by B.
[0056]
[Image output]
The embossed pattern is created as described above. Thereafter, the embossed pattern is output to the display device or printer of the image output means 6 to check the workmanship, and if desired, stored in the external storage device. You can do it.
[0057]
[Creating a decorative sheet]
The decorative sheet is created by creating an embossed plate based on the created emboss pattern and embossing the resin sheet. The technique for this is well known. For example, after forming a resist on the cylinder using the created emboss pattern, an emboss plate is created by direct etching, and the resin sheet is embossed with the emboss plate.
[0058]
In the decorative sheet created in this way, for example, assuming that the black part of FIG. 9 is embossed so as to be convex, in the inner circle and square area, the vertically long pattern occupies a large number, In the background area other than that, the horizontally long pattern occupies a large number, so the direction of illumination and the direction of the line of sight, and the direction of the pattern, that is, whether it is a vertically long pattern or a horizontally long pattern, There are areas that appear bright and areas that appear dark. That is, a gloss difference occurs.
[0059]
Further, when the direction of the line of sight is changed with the direction of illumination constant, the area that appears bright and the area that appears dark change. That is, the gloss difference changes.
[0060]
As described above, according to this embossing pattern creation device, when embossing is applied to a resin sheet, a decorative sheet is created that combines the shine of the mortar and the matte texture. An embossing pattern that can be created can be created.
[0061]
As mentioned above, although the embossing pattern production | generation apparatus which concerns on this invention, the embossing pattern production method, and the production method of the decorative sheet were demonstrated, this invention is not limited to the said embodiment, A various deformation | transformation is possible.
[0062]
For example, in the above-described embodiment, a vertical pear-tone pattern having a vertical directionality and a horizontal pear-tone pattern having a horizontal directionality are created. However, as described above, the present invention is not limited thereto. Instead, it is only necessary to create at least two pear-tone patterns having different directions and to synthesize the pear-tone patterns having these directions based on the color number of each pixel of the mask image. . That is, more specifically, at least two pear-tone patterns having different directions are created, and the color of the pixel on the mask image corresponding to the target pixel of the created image is referred to by referring to the allocation correspondence table. The operation of setting the pixel value corresponding to the target pixel of the satin tone pattern having the directivity associated with the number as the value of the target pixel of the generated image may be performed for all the pixels of the generated image. At this time, as described above, the number of color numbers to be given to the pixels of the mask image is required by the number of textured patterns having the directionality to be created.
[Brief description of the drawings]
FIG. 1 is a diagram for briefly explaining the concept of a decorative sheet to be created by an emboss pattern creating apparatus according to the present invention.
FIG. 2 is a diagram showing an embodiment of an emboss pattern creating apparatus according to the present invention.
[Fig. 3] When combining a vertical pear-tone pattern and a horizontal pear-tone pattern using a mask image, where to assign the vertical pear-tone pattern and where to assign the horizontal pear-tone pattern It is a figure which shows the example of the allocation correspondence table defined.
FIG. 4 is a diagram illustrating an example of a mask image.
FIG. 5 is a diagram illustrating an example of a vertical direction textured pattern.
FIG. 6 is a diagram showing an example of a horizontal direction textured pattern.
[Fig. 7] A horizontally long pattern occupies a large number in an image obtained by scaling a satin-like pattern in a horizontal direction, and a vertically long pattern occupies a large number in an image obtained by scaling a pear-tone pattern in a vertical direction. 7 (b) shows the black circle shown in FIG. 7 (a) that has been scaled by three times in the horizontal direction, and FIG. 7 (c) shows FIG. 7 (a). The black circle is scaled by 3 times in the vertical direction.
FIG. 8 is a diagram for explaining the operation of the image composition means 5;
FIG. 9 is a diagram showing an example of an emboss pattern created by the image composition means 5;
FIG. 10 is a diagram illustrating an example of a satin finish pattern.
FIG. 11 is a diagram for explaining a non-fractal two-dimensional scalar field generation method disclosed in Japanese Patent Laid-Open No. 11-149561.
FIG. 12 is a diagram for explaining a non-fractal two-dimensional scalar field generation method disclosed in Japanese Patent Laid-Open No. 11-149561.
FIG. 13 is a diagram for explaining that a scalar field having various desired characteristics can be generated by the non-fractal two-dimensional scalar field generation method disclosed in Japanese Patent Application Laid-Open No. 11-149561.
FIG. 14 is a diagram showing an example of a corrugated pattern.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Input means, 2 ... Pear tone pattern generation means, 3 ... Scaling means, 4 ... Mask image input means, 5 ... Image composition means, 6 ... Image output means

Claims (3)

Inputting a mask image in which a color number is determined for each pixel;
A step of inputting predetermined parameters such as an allocation correspondence table in which a color number determined for the mask image and at least two pear-tone patterns having directions in mutually different directions are associated, a created image size, and the like;
Based on the input parameter value, generating a satin pattern having no directionality;
A step of scaling the pear-tone pattern having no directionality to each other in different directions to create at least two pear-tone patterns having directionality;
With reference to the allocation correspondence table, the value of the pixel corresponding to the target pixel of the satin pattern having the direction corresponding to the color number of the pixel on the mask image corresponding to the target pixel of the created image, An emboss pattern creating method comprising: performing an operation for setting the value of the target pixel of the created image on all the pixels of the created image to create an emboss pattern. A mask image input means for inputting a mask image in which a color number is determined for each pixel;
An input means for inputting predetermined parameters such as an allocation correspondence table in which color numbers determined for a mask image and at least two pear-tone patterns having directions in different directions are associated with each other, and a created image size ,
Based on the input parameter value, a satin pattern generating means for generating a satin pattern that does not have directionality;
A scaling unit that creates a pear-tone pattern having directionality by scaling a pear-tone pattern that does not have directionality in different directions, respectively,
With reference to the allocation correspondence table, the value of the pixel corresponding to the target pixel of the satin pattern having the direction corresponding to the color number of the pixel on the mask image corresponding to the target pixel of the created image, An embossing pattern creating apparatus, comprising: an image synthesizing unit that creates an embossed pattern by performing an operation for setting the value of the target pixel of the created image on all pixels of the created image. Inputting a mask image in which a color number is determined for each pixel;
A step of inputting predetermined parameters such as an allocation correspondence table in which a color number determined for the mask image and at least two pear-tone patterns having directions in mutually different directions are associated, a created image size, and the like;
Based on the input parameter value, generating a satin pattern having no directionality;
A step of scaling the pear-tone pattern having no directionality to each other in different directions to create at least two pear-tone patterns having directionality;
With reference to the allocation correspondence table, the value of the pixel corresponding to the target pixel of the satin pattern having the direction corresponding to the color number of the pixel on the mask image corresponding to the target pixel of the created image, An operation of setting the value of the target pixel of the created image for all the pixels of the created image to create an emboss pattern;
Creating an embossed plate based on the created embossed pattern;
And a step of embossing the resin sheet with the created embossed plate.

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