JP2018192729A - Forgery preventive printed matter creation method, and program for creating forgery preventive printed matter - Google Patents

Abstract

To provide a method and a program for creating a printed matter of which a printing pattern consisting of a forgery prevention element has a streak area percentage, in gradation, which is gradually lost toward an outermost edge portion, even with having the forgery prevention element.SOLUTION: There are provided a method and a program for creating a forgery preventive printed matter having following steps: a template creation step of selecting an image film as a base of a template and inputting the same by an image creation part; a parameter setting step conducted for each setting items by an item setting part; an image creation step of inputting a non-visible image data, visible image data and α image data by the image creation part; and an operation step of applying an arrangement regulation of a template film to each pixel of the visible image data and the non-visible image data, and arranging them by an operation part to create data of a printing pattern part, in which a property at gray level of a pixel concentration of the α image data is applied to pixel concentration of each pixel of the template file.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an anti-counterfeit printed matter formed by a forgery-preventing image line that requires a delicate image line structure in a printed material that requires prevention of counterfeiting and tampering such as banknotes, passports, securities, cards, and valuable printed materials. The present invention relates to a creation method and a forgery-preventing printed matter creation program.

  In general, various technologies have been applied to valuable printed matter of certificates in order to provide an effect of preventing forgery. However, in recent years, forgery of certificates has been accompanied by the improvement in image quality of color copiers and computerization of color platemaking technology. Technology tends to diversify. The accompanying measures to prevent forgery of certificates have been dealt with by upgrading them. However, on the other hand, the manufacturing cost for anti-counterfeiting measures also increases, and it may be expensive due to true / false judgments, such as introducing special equipment consisting of special machinery and equipment to obtain an environment for confirming the anti-counterfeit effect. there were.

  As a useful method that enables authenticity determination at a low cost, there is a technique in which a discrimination tool is superimposed on a printed material. In other words, an invisible image is expressed as a visible image by overlaying a discriminating tool on a printed material on which an invisible image is applied. The main form of the discriminating tool is a transparent sheet printed with a parallel line screen (hereinafter referred to as “ten thousand”). Line filters ”) or lenticular lenses. There are mainly two types of techniques for expressing an invisible image using this discriminator, and there are point phase modulation and line phase modulation.

  A printed matter in which a latent image is developed by overlapping such discriminating tools composed of line filters and its authenticity discrimination method include a background image portion printed with lines or halftone dots, and a phase different from that of the background image portion. There is a printed material having a latent image portion printed with a single line or halftone dot. The background image portion and the latent image portion of the printed matter are difficult to see at a glance, but when the line filter is superimposed on the printed matter at a predetermined position, the background image portion and the latent image portion are visible. There is known a method in which a part can be divided and visually recognized.

  As an example of dot phase modulation, there is an isogram from Astron Design (Netherlands) (see, for example, Non-Patent Document 1, page 340). This is because an invisible image is given by the phase of fine halftone dots in a flat pattern having a uniform density at first glance, and when a dedicated sheet is superimposed on the printed matter, it becomes a visible image in either negative or positive form. It is what is done. However, since this is a flat pattern having a uniform density, an image cannot be clearly displayed.

  As an example of line phase modulation, there is HIT (Hidden Image Technology) of Yura (Hungary) (for example, see Non-Patent Document 1, page 341). This is because an invisible image is given by the phase of fine lines in a flat pattern with a uniform density at first glance, and when a dedicated sheet is stacked on the printed matter, it becomes a visible image in either negative-positive form. It is what is done. Since there is a possibility that an invisible image can be confirmed even with normal viewing, a visible image is provided by changing the line width of a part of the line as a camouflage pattern. Moreover, you may provide a visible image with a white drawing line. However, this camouflage pattern has a problem in that when the invisible image is made visible by overlapping a dedicated sheet, the camouflage pattern also appears as a visible image at the same time, thus impairing the visibility when the invisible image appears. .

  In general, a pattern formed by dot phase modulation or line phase modulation has a flat shape. There is no possibility that an invisible image can be confirmed even with normal viewing in a printed matter, and an invisible image that can be clearly expressed with a single discriminating tool is formed, and the invisible image is arranged in a predetermined direction. An anti-counterfeit printed matter is disclosed in which visibility is not hindered by a visible image when expressed.

  Further, as an example, the applicant of the present invention has a unit comprising a first image line and a second image line arranged on the base material so as to face the center along the first direction. A plurality of units are regularly arranged at a constant pitch in each area, and in each unit arranged in a plurality, the first image line and the second image line have a negative-positive relationship, and the area and color are the same. Yes, in the first image line and the second image line, an invisible image is formed by a combination of one on and the other off, and the first image line and the second image line arranged to form the invisible image In the image line, a position that is originally arranged adjacent to the first direction and a position where an off portion of the units arranged adjacent to each other are arranged adjacent to each other in a predetermined direction. To alleviate the density imbalance in the region, the first and second lines And a third image line having the same or substantially the same color area ratio and being arranged with the boundary line between the first image line and the second image line as the center or approximately the center. An application for anti-counterfeit printed matter has been filed (for example, see Patent Document 1).

  Furthermore, the applicant of the present invention is a creation device and creation program that can easily realize Patent Document 1 with a computer algorithm, and is a basis on which an invisible image is visually recognized as a latent image when a lenticular lens or a line filter is superimposed. An image input unit for inputting first image data, and setting of resolution in halftone data, setting of coloring, and setting of halftone dot shapes of the first image line, the second image line, and the third image line Image data having an invisible image composed of a first image line and a second image line with the content set by the item setting unit for the item setting unit performed for each item and the first image data input by the image input unit And a halftone dot data generation device characterized by further comprising an operation unit that combines image data having an invisible image and a third image line to alleviate the density imbalance. Are (e.g., see Patent Document 2).

  In addition, the applicant has a printing area in which units having the first element, the second element, and the third element are regularly formed in a matrix at a predetermined pitch on at least a part of the substrate. The first element is formed on the same line along the first direction, and the second element and the third element are formed at positions shifted from the same line along the first direction. One element has a gradation, and each second element has a gradation obtained by inverting the gradation of the first element in the same unit, and the first element causes the first invisible image to be generated. An application has been filed for a printed matter that is formed, a negative image of the first invisible image is formed by the second element, and a visible image is formed by the third element (see, for example, Patent Document 3). .

Optical Security and Counterfeit Deterrence Techniques IV Vol.4677 (by SPIE-The International Society for Optical Engineering)

Japanese Patent No. 4635160 Japanese Patent No. 4915883 Japanese Patent Laying-Open No. 2015-101040

  However, the feature of the printed matter formed by Patent Documents 1 to 3 is that the entire pattern has a screen pattern (a line pattern, a halftone pattern, etc.) having a uniform density of an image area ratio of 10 to 50%. It is. This is an essential condition for forming an invisible image. That is, when the screen pattern having a uniform density is used in combination with other anti-counterfeiting elements on the printed matter, for example, in combination with a line drawing pattern such as a background pattern or a color pattern, there is a problem that the affinity of the pattern itself is poor.

  The present invention aims to solve the above-described problems. Specifically, for a screen pattern constituting an anti-counterfeit element, the image area ratio is stepped toward the outermost periphery of the screen pattern while including the anti-counterfeit element. The printed matter is reduced to 0%. Furthermore, an automatic generation program capable of calculating and outputting a 1-bit image to be a printed pattern of the printed matter, a multi-bit format image having monochrome continuous gradation or full color gradation is provided.

  In the present invention, a plurality of units having image lines for forming each image of an invisible image and a visible image are arranged in a matrix form on at least a part of a substrate, and a lenticular lens or a line is used for the image line forming the invisible image. When a filter is overlaid, an anti-counterfeit printed matter having a continuous tone with a printed pattern portion where an invisible image is visually recognized as a latent image is output to a line creation unit, an image creation unit, an item setting unit, a calculation unit, and an output. A template creating step of selecting a template that is a drawing line to be applied to a visible image and an invisible image by the drawing line creation unit and creating the template by an input or calculation unit; In the item setting section, the setting of the output resolution of the template, the setting of the number of lines of the printed pattern portion, the setting of the coloring of the printed pattern portion, and the template shape are performed for each setting item. The meter setting step and the image creating unit, the alpha image that performs continuous shading processing on the entire printed pattern part, the image that is the basis of the visible image, and the image that is the basis of the invisible image are input or calculating unit Based on each image and setting item, the image creation step to be created and the calculation unit apply a template placement rule to each pixel of the visible image and the invisible image to place the template in the unit. According to the density value of the pixel density of the α image with respect to the pixel density, a calculation step of arranging the units in a matrix to form a printed pattern portion, an output step of outputting the formed printed pattern portion by the output unit, A method for producing a forgery-preventing printed matter.

  The present invention is a program for creating an anti-counterfeit printed matter for causing an image creating apparatus having an image line creating unit, an image creating unit, an item setting unit, an operation unit, and an output unit to execute a method for creating an anti-counterfeit printed matter. A template creation step for selecting an image file that is the basis of the template by the image line creation unit and inputting or creating it by the calculation unit, and setting of the output resolution of the template and setting of the number of lines of the print pattern portion by the item setting unit A parameter setting step for setting the coloring of the print pattern portion and the template shape for each setting item; and α image data of an α image for performing continuous shading processing on the entire print pattern portion by the image creation portion; A visible image data that is a basis of a visible image, and an invisible image data that is a basis of an invisible image; Based on each image data and setting items, template file placement rules are applied to each pixel of visible image data and invisible image data to place a template file in the unit. In accordance with the density value of the pixel density of the α image data, a calculation step for arranging the units in a matrix to create print pattern data, and the output unit outputs the print pattern part based on the print pattern data. An anti-counterfeit printed matter creating program that causes an image creating apparatus to execute a method for creating an anti-counterfeit printed matter comprising an output step.

  When the printed matter according to the present invention is used together with other anti-counterfeiting elements on the printed matter, for example, when used together with a line drawing pattern such as a tint block pattern or a chromatic pattern, the screen area constituting the anti-counterfeiting element includes the anti-counterfeiting element and the area of the drawing Since the rate gradually decreases to 0% toward the periphery of the screen pattern, the affinity with other patterns increases, and the degree of freedom in design also improves. In addition, a program that automatically generates a 1-bit image of a screen pattern, a monochrome continuous tone or a full-color tone, and a multi-bit format image generation program makes it easy for those who have no special knowledge to easily create a 1-bit image, a monochrome continuous tone, or a full color. It is possible to calculate and output a multi-bit format image having gradation.

The figure which showed a mode that the discrimination tool (2) was piled up on printed matter (1). The figure by which the state observed by visual observation in normal visibility conditions was shown. The figure which showed the state by which the discriminating tool (2) was superimposed and the 1st invisible image (5) was expressed as a visible image. The figure which showed the state by which the discriminating tool (2) was superimposed and the 2nd invisible image (6) was expressed as a visible image. The figure which expanded and showed the component of one stroke of the printed pattern of this invention. FIG. 6 is a diagram showing each template that is an 8-bit image with a gray level in each drawing element shown in FIG. 5. The flowchart in which the processing algorithm of the application software installed in the computer was shown. The figure by which the 1st 1st visible image (4) and the 2nd visible image (8) were each shown. The figure in which the 1-bit 1st invisible image (5) and the 2nd invisible image (6) were each shown. The figure by which the 8-bit alpha image was shown. The flowchart by which the main algorithms in this invention were shown. FIG. 7 is a flowchart showing a processing algorithm for arranging the stroke group of “Group A” shown in FIG. 6. FIG. 13 is a diagram showing a state where a template (A), a template (A ′), a template (a), and a template (AE) are applied according to the processing algorithm shown in FIG. 12. FIG. 7 is a flowchart showing a processing algorithm for arranging the stroke group of “Group B” shown in FIG. 6. FIG. 15 is a diagram showing a state where a template (B), a template (B ′), a template (b), and a template (BE) are applied according to the processing algorithm shown in FIG. 14. FIG. 7 is a flowchart showing a processing algorithm for arranging “Group C” shown in FIG. 6 and other image line groups. FIG. 17 is a diagram showing a state where a template (CE) is replaced with a pixel to which the template (C) is applied according to the processing algorithm shown in FIG. 16. FIG. 17 is a diagram showing a state where a template (CE) is replaced with a pixel to which the template (C) is applied according to the processing algorithm shown in FIG. 16. FIG. 17 is a diagram showing a state in which a template (EE) is replaced with pixels to which the template (AE) and the template (BE) are applied according to the processing algorithm shown in FIG. 16. FIG. 17 is a diagram showing a state where a template (CEE) is replaced with a pixel to which the template (AE), the template (BE), and the template (C) are applied according to the processing algorithm shown in FIG. 16. FIG. 12 is a diagram showing a 1-bit image output according to the processing algorithm shown in FIG. 11. The figure in which the printed matter which printed 1 bit image shown by FIG. 21 was shown. The figure by which the discrimination tool (2) was superimposed on the printed pattern part (3) on the printed matter (1) of FIG. 22, and the state which the 2nd invisible image (6) became visible and was expressed was shown. The figure by which the discrimination tool (2) was superimposed on the printed pattern part (3) on the printed matter (1) of FIG. 22, and the state which the 2nd invisible image (6) became visible and was expressed was shown. The figure which showed a mode that the discrimination tool (2) was piled up on printed matter (1). The figure by which the state observed by visual observation in normal visibility conditions was shown. The figure which showed the state by which the discriminating tool (2) was superimposed and the 1st invisible image (5) was expressed as a visible image. The figure which showed the state by which the discriminating tool (2) was superimposed and the 2nd invisible image (6) was expressed as a visible image. The figure which expanded and showed the component of one stroke of the printed pattern of this invention. FIG. 6 is a diagram showing each template that is an 8-bit image with a gray level in each drawing element shown in FIG. 5. The flowchart in which the processing algorithm of the application software installed in the computer was shown. The figure by which the visible image (4) of 8 bits was shown. The figure by which the 8-bit 1st invisible image (5) and the 2nd invisible image (6) were shown. The figure by which the 8-bit alpha image was shown. The flowchart by which the main algorithms in this invention were shown. The horizontal axis represents the pixel density of the first invisible image (5) in five levels, and the vertical axis represents the pixel density of the second invisible image (6) in five levels. The figure which showed the pixel density of the visible image (4) concretely in five steps. The figure in which the pixel density was determined according to the gray level characteristics. The figure in which the 8-bit image output without applying the α image (9) and the 8-bit image output with the α image (9) applied are shown. The figure in which the critical value arrangement | sequence image for making the image of a several bit format into 1 bit image was shown. FIG. 17 is a diagram showing a 1-bit image applied to the entire matrix space using the threshold value array image shown in FIG. 16. The figure in which the printed matter which printed 1 bit image shown by FIG. 17 was shown. The figure by which the discrimination tool (2) was superimposed on the printed pattern part (3) on printed matter (1), and the state observed visually from the front was shown. The figure by which the discrimination tool (2) was superimposed on the printed pattern part (3) on printed matter (1), and the state observed visually from the front was shown. The block diagram which shows the structure of the apparatus used for preparation of the forgery prevention printed matter of this invention. Schematic of the forgery prevention printed matter creation method and the forgery prevention printed matter creation program of this invention.

  DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims.

  As shown in FIG. 45, the image creating apparatus used for creating the anti-counterfeit printed matter (1) according to the embodiment of the present invention includes an image line creating unit (T1), an image creating unit (T2), and an item setting unit (T3). ), An operation unit (T4) and an output unit (T5). The image line creation unit (T1) and the image creation unit (T2) input data necessary for creating the forgery-preventing printed material (1) according to the embodiment of the present invention and give the data to the calculation unit (T4). The item setting unit (T3) sets each item such as the shape of the image line, the resolution, and the color for creating the forgery-preventing printed matter (1). The calculation unit (T4) performs calculation processing and image processing necessary for creating the forgery-preventing printed matter (1) based on the given data and the setting of the item setting unit (T3), and outputs the obtained result Part (T5). The output unit (T5) outputs the data given from the calculation unit (T4) to, for example, an external printer, monitor, etc. (not shown).

  With respect to a method for creating a forgery-preventing printed matter according to the present embodiment using the above-described image creation device, a method for creating a forgery-preventing printed matter and a program for creating the same will be mainly described with reference to FIG. I will do it. In the following description, description will be made with reference to FIG. 46 showing a procedure for creating a 1-bit image or a multi-bit image having monochrome continuous gradation or full color gradation, which will be described later. Note that the image data in the present invention is described as being composed of a plurality of pixels.

  As shown in FIG. 46, in the template creation step (ST1), a template, which is an image line that forms an invisible image and a visible image, is selected as an image file from the outside by the image line creation unit (T1), and is input or operated. Created in (T4).

  In the parameter setting step (ST2), the output setting of the template, the setting of the number of lines of the printed pattern portion, the setting of the coloring of the printed pattern portion, and the shape of the template are performed by the item setting unit (T3). The output resolution is a resolution setting value of an image obtained as a result of calculation. Since the output resolution has individual setting values in various output devices such as CTP and printer, it is a necessary setting item for each output device. With the number of filter lines, the number of lines of the line filter or lenticular lens of the discriminator (2) shown in FIGS. 3, 4, 27, and 28 is set. Coloring means “C”, “M”, “Y”, and “K” in each image line forming each invisible image and each image line forming each visible image.

  In the image creation step (ST3), when a lenticular lens or a line filter is superimposed on the printed pattern portion, the invisible image data that is a basis for visually recognizing the invisible image as a latent image, The visible image data and the α image data for performing continuous shading processing on the entire printed pattern portion are input from the outside from the image creation portion (T2) or created by the calculation portion (T4).

  Next, in the calculation step (ST4), the calculation unit (T4) applies a template to each pixel of the visible image and the latent image based on each image data and setting items, and sets each pixel. Arranged in the unit, the pixel density of the α image is applied to the pixel density of each pixel of the template arranged in the unit, and the units are arranged in a matrix to create image data of the printed pattern portion.

Next, an output step (ST5) gives the image data of the printed pattern part created by the calculation part (T4) to the output part (T5), and outputs the printed pattern part on the substrate. Or before outputting on a base material, the output for confirming a printing pattern part by a preview display on a monitor screen is performed.
(First embodiment)

  Next, a 1-bit image automatic generation program according to the first embodiment of the present invention and a printed matter created by the automatic generation program will be described with reference to the drawings.

(Forgery prevention printed matter)
A 1-bit image obtained by the automatic generation program according to the first embodiment, that is, a printed matter on which an image composed of binary information is printed, is displayed on the printed matter (1) as shown in FIG. ) Can be easily displayed to show an invisible image and authenticity can be discriminated. The discriminating tool (2) is a line filter, a lenticular lens, or the like in which a plurality of straight lines are formed along a single line in a transparent filter. When the printed pattern portion (3) of the printed matter (1) is visually observed under normal visibility conditions, as shown in FIG. 2, a pattern composed of an arbitrary figure, character, or the like is visually recognized.

  The printed pattern portion (3) includes a first visible image (4) and a second visible image (8). The first visible image (4) and the second visible image (8) are provided in advance in a 1-bit image that is the basis of the printed pattern portion (3). When the discriminating tool (2) is superposed on the printed matter (1) with a predetermined angle (this is 0 degree), the first as shown in FIG. 3 (a) or FIG. 3 (b) is obtained. The invisible image (5) appears as a visible image. Further, when the discriminating tool (2) is superimposed on the printed matter (1) at an angle of 90 degrees with respect to a predetermined angle, the first as shown in FIG. 4 (a) or FIG. 4 (b). Two invisible images (6) appear as visible images. As shown in FIG. 3 (a) or FIG. 3 (b) and FIG. 4 (a) or FIG. 4 (b), the negative and positive shapes appear between the discriminator (2) and the printed material (1). This is caused by the relative position between them and is within the scope of the effect of the present invention.

  In the techniques disclosed in the above-described prior art documents and patent documents, the printed pattern is a screen pattern having a substantially uniform density. The screen pattern having this uniform density reaches the periphery of the printed pattern while maintaining almost the same density. This is a feature common to pattern expressions based on the moire effect as shown in the prior art documents and patent documents. Therefore, in the present invention, as shown in FIG. 2, the printed pattern portion (3) is a printed matter whose density is gradually reduced to 0% from the center toward the outermost periphery (G). It has become. That is, in the first invisible image (5) shown in FIG. 3 and the second invisible image (6) shown in FIG. 4, the printed pattern portion (3) is directed from the center toward the outermost periphery (G). It is synchronized with the line area ratio decreasing step by step. That is, continuous shading is provided on the entire printed pattern portion (3). The continuous shading in the entire printed pattern portion (3) is provided in advance in the 1-bit image that is the basis of the printed pattern portion (3).

(Basic drawing line configuration)
FIG. 5 is an enlarged view of components necessary for the present invention. As shown in FIG. 5A, the image line (A) and the image line (A ′) are paired to form the first invisible image (5), and the image line (A) and the image line (A ′) Lines (A ′) are arranged vertically symmetrically from the center in the smallest unit (rectangle) that is an area surrounded by the dimension S. The image line (B) and the image line (B ′) are paired to form a second invisible image (6), and the image line (B) and the image line (B ′) are respectively united. In (rectangle), they are arranged symmetrically from the center. Further, the image line (C) forms a first visible image (design: pattern), and forms the first visible image (4) composed of arbitrary figures and characters as shown in FIG. The line (D) is arranged at the four corners of the unit (rectangle). Further, the image line (D) forms a second visible image (design: pattern), and forms the second visible image (8) composed of arbitrary figures and characters as shown in FIG. It is arranged so that the center of the drawing line (C) coincides with the center of the unit (rectangle). The image line (E), the image line (a), and the image line (b) are provided in order to alleviate the density imbalance when viewed with the naked eye. This will be described in detail later.

(Continuous tone reproduction area)
Each image line includes a continuous tone reproduction region in which the gradation continuously increases and decreases from the center of the image line to the periphery of the image line. The image line (A) includes an area (Ag) and an image line (A ′). Is an area (Ag ′), an image line (a) is an area (ag), an image line (B) is an area (Bg), an image line (B ′) is an area (Bg ′), an image line (b) ) Includes an area (bg), an image line (C) includes an area (Cg), an image line (D) includes an area (Dg), and an image line (E) includes an area (Eg). Furthermore, the image area ratio is set in a timely manner by these continuous tone reproduction regions. For example, in the area (Ag) of the image line (A), the image area ratio is continuously set within the components of one image line. That is, as shown in FIG. 5B, the area of the region (Ag) increases or decreases from the center of each image line in accordance with the gray level corresponding to highlight to shadow. Note that the gray level according to the present embodiment has 256 levels. When the gray level is low (the density is high), the image line (A) exists in the entire area (Ag), and when the gray level is high (the density is low), the area (Ag) of the image line (A) decreases. . Note that the region (Ag ′) in the image line (A ′), the region (Bg) in the image line (B), the region (Bg ′) in the image line (B ′), the region (ag) in the image line (a), The same applies to the region (bg) in the image line (b), the region (Dg) in the image line (D), the region (Cg) in the image line (C), and the region (Eg) in the image line (E).

  Next, each step of the forgery prevention printed matter creation method and creation program of the first embodiment will be described in detail.

(Template creation step)
The pattern of the first embodiment is generated by application software installed in a computer. The application software is executed according to the flowchart shown in FIG. First, the user selects the template shown in step S1 of FIG. 7 in the template creation step (ST1) by the image line creation unit (T1). The template is an image file in which the image line elements shown in FIG. 5 are individually set. As shown in FIG. 6, the image line elements are templates for each image line element. Each template is a multi-valued image, and in the present embodiment, it is an 8-bit image having 256 levels of gray levels. For example, the vertical and horizontal dimensions of each template are 84 × 84 pixels. This is defined so that the number of lines of the lenticular lens of the discriminator (2) is equivalent to 75 lines / inch when the final output resolution of the pattern of the present invention is 6400 dpi. This will be described in detail later.

(Template structure)
The template mainly includes a template group “group” that forms the image line (A), the image line (A ′), the image line (a), and the image line (AE) for forming the first invisible image (5). A ”, the template group“ group B ”that forms the image line (B), the image line (B ′), the image line (b), and the image line (BE) for forming the second invisible image, A template group “group C” constituting an image line (C) for forming one visible image (design: pattern), and other image line (EE) and image line (D) templates linked in accordance with the calculation result Classified into groups. In addition, the image line (A) of the template (A) includes an area (Ag), and each image line of the template includes each continuous tone reproduction area.

(Image creation step)
In the image creation step (ST3) by the image creation unit (T2), the user designates the first visible image (4) shown in step S2 of FIG. If necessary, the second visible image (8) shown in step S3 is designated. The first visible image (4) and the second visible image (8) may be 1-bit images because of monochrome two gradations. The first visible image (4) and the second visible image (8) are for defining matrix space coordinates for arranging the template group of the “group C” and the template (D). There is no relationship between the number of pixels of the vertical and horizontal dimensions of each template and the number of pixels of the first visible image (4) and the second visible image (8). For example, the first visible image (4) shown in FIG. 8 is designated. In the present embodiment, in order to make the effect more prominent, the same image as the first visible image (4) in FIG. 8 is designated for the second visible image (8).

  The user designates the first invisible image (5) shown in step S4 of FIG. If necessary, the second invisible image (6) shown in step S5 is designated. The first invisible image (5) and the second invisible image (6) may be 1-bit images because of monochrome two gradations. The number of pixels of the first invisible image (5) and the second invisible image (6) is the same as the number of pixels of the first visible image (4) and the second visible image (8). The first invisible image (5) and the second invisible image (6) are for defining matrix space coordinates for arranging the template group of “Group A” and the template group of “Group B”. There is no relationship between the number of pixels in the vertical and horizontal dimensions of each template and the number of pixels in the first invisible image (5) and the second invisible image (6). For example, the first invisible image (5) shown in FIG. 9A and the second invisible image (6) shown in FIG. 9B are designated.

(Specify α image)
The user designates the α image (9) shown in step S6 of FIG. The α image (9) is the first visible image (4), the second visible image (8), and the first invisible image (5) included in the printed pattern portion (3) shown in FIG. ) And the second invisible image (6) have an effect of decreasing the image area ratio from the center of the screen pattern toward the outermost periphery (G) to 0% step by step while providing forgery prevention elements. is there. Therefore, the α image (9) is at least an 8-bit image because continuous tone is required. The number of pixels of the α image (9) is the same as the number of pixels of the first visible image (4) and the second visible image (8). Each template group is for defining the matrix space coordinates in which each template group is arranged. The number of pixels in the vertical and horizontal dimensions of each template and the pixels of the first invisible image (5) and the second invisible image (6). It has nothing to do with numbers. For example, the α image (9) shown in FIG. 10 is designated. The α image (9) in FIG. 10 is an 8-bit image having 256 levels of gradation.

(Parameter setting step)
In the parameter setting step (ST2) by the item setting unit (T3), setting of the output resolution of the template, setting of the number of lines of the lenticular lens or line filter, setting of coloring of the printed pattern portion and setting of the shape of the template are items. Set parameters for each setting.

  In the parameter setting step (ST2) by the item setting unit (T3), the user sets the number of filter lines shown in step S9 of FIG. The number of filter lines is the number of lines of the line filter, lenticular lens, etc. of the discriminator (2) shown in FIGS. In the first embodiment, it is 75 lines / inch.

  The user can select “C”, “M”, “Y”, and “K” for each image line that forms each invisible image, each image line that forms each visible image, and an image line for reducing density imbalance. Set the coloration.

  The user sets the output resolution of the template shown in step S10 of FIG. In the first embodiment, it is 6400 dpi.

(Calculation step)
In the calculation step (ST4) by the calculation unit (T4), based on each image data and setting items, a template is applied to each pixel of the visible image and the invisible image, and each pixel is arranged in the unit. A calculation step is performed in which the pixel density of the α image (9) is applied to the pixel density of each pixel of the template, and the units are arranged in a matrix to create a printed pattern portion.

(Starts generating images)
The user executes the start of image generation shown in step S11 in the calculation step (ST4) of FIG. In image generation, the entire matrix space is constructed based on the layout rules of each template. The arrangement rule of each template is for constructing the entire matrix space by the following algorithm. The template arrangement rule in the first embodiment is application of group A, B, C, and α images to be described later.

  Since the start of image generation shown in step S11 of FIG. 7 is the main algorithm in the present invention, it will be described in more detail with reference to FIG. From the setting of the output resolution shown in step S10, the first invisible image (5) is connected to the terminal “1” of the flowchart, and the second invisible image (6) is connected to the terminal “2”. Transition.

(Application of Group A)
The terminal “1” in the flowchart of FIG. 11 is the terminal “1” in the flowchart of FIG. This algorithm is a process for arranging the stroke group of “Group A” shown in FIG.

  First, the template (A) shown in FIG. 12 in order from the upper left pixel based on the 0 and 1 information of the binary image pixel which is the first invisible image (5) shown in FIG. And application of the template (A ′) is performed. That is, when the pixel [h, v] matches the condition of 1, the template (A) shown in FIG. 6 is applied to the pixel [h, v], the pixel [h, v] is 0, and the pixel When [h, v + 1] matches the condition of 0, the template (A ′) shown in FIG. 6 is applied to the pixel [h, v]. This process is performed on the entire image matrix from the upper left pixel to the lower right pixel. In the pixel [h, v], when the adjacent pixels are all 1, the pixel [h, v] is adjacent to the template (A) having the image line (A) as shown in FIG. Has been applied.

  Next, when the condition that the template (A) is applied to the pixel [h, v] and the template (A ′) is applied to the pixel [h, v + 1] is met, the image is applied to the pixel [h, v]. Line template (a) is applied. That is, as shown in FIG. 13B, the image line (a) is applied between the pixel [h, v] and the pixel [h, v + 1].

  Next, it matches the condition in which the template (A ′) is applied to the pixel [h, v], the template is not applied to the pixel [h, v + 1], and the template (A) is applied to the pixel [h, v + 2]. Then, the template (AE) in the pixel [h, v] is applied. That is, as shown in FIG. 13C, the image line (AE) is applied to the pixel [h, v + 1].

  Next, a condition that the template (A ′) is applied to the pixel [h, v], the template is not applied to the pixel [h, v + 1], and the template (A ′) is applied to the pixel [h, v + 2] is satisfied. When they match, the template (AE) and the template (a) at the pixel [h, v] are applied. That is, as shown in FIG. 13D, the image line (AE) is applied to the pixel [h, v + 1], and the image line (a) is intermediate between the pixel [h, v + 1] and the pixel [h, v + 2]. Applies.

(Application of Group B)
The terminal “2” in the flowchart in FIG. 11 is the terminal “2” in the flowchart in FIG. This algorithm is a process for arranging the stroke group of “Group B” shown in FIG.

  First, the template (B) shown in FIG. 14 in order from the upper left pixel based on the 0 and 1 information of the binary image pixel which is the second invisible image (6) shown in FIG. 9B. And application of the template (B ′) is performed. That is, when the pixel [h, v] matches the condition of 1, the template (B) shown in FIG. 6 is applied to the pixel [h, v], the pixel [h, v] is 0, and the pixel When [h + 1, v] matches the condition of 0, the template (B ′) shown in FIG. 6 is applied to the pixel [h, v]. This process is performed on the entire image matrix from the upper left pixel to the lower right pixel. In the pixel [h, v], when the adjacent pixels are all 1, the pixel [h, v] is adjacent to the template (B) having the image line (B) as shown in FIG. Has been applied.

  Next, when the condition that the template (B) is applied to the pixel [h, v] and the template (B ′) is applied to the pixel [h + 1, v] is met, the image is applied to the pixel [h, v]. Line template (b) is applied. That is, as shown in FIG. 15B, the image line (b) is applied between the pixel [h, v] and the pixel [h + 1, v].

  Next, the condition is met that the template (B ′) is applied to the pixel [h, v], the template is not applied to the pixel [h + 1, v], and the template (B) is applied to the pixel [h + 2, v]. Then, the template (BE) at the pixel [h, v] is applied. That is, as shown in FIG. 15C, the image line (BE) is applied to the pixel [h + 1, v].

  Next, the template (B ′) is applied to the pixel [h, v], the template [B + 1] is not applied to the pixel [h + 1, v], and the template (B ′) is applied to the pixel [h + 2, v]. When they match, the template (BE) and the template (b) at the pixel [h, v] are applied. That is, as illustrated in FIG. 15D, the image line (BE) is applied to the pixel [h + 1, v], and the image line (b) is intermediate between the pixel [h + 1, v] and the pixel [h + 2, v]. Applies.

(Application of Group C)
Next, an image line (C) and an image line (D) are arranged. The image line (C) forms the first visible image (design: pattern) and becomes the image line constituting the first visible image (4) composed of arbitrary figures and characters as shown in FIG. The image line (D) forms the second visible image (design: pattern) and forms the second visible image (8) composed of arbitrary figures and characters as shown in FIG. It becomes. In the present embodiment, in order to simplify the description, as shown in FIG. 8, the first visible image (4) and the second visible image (8) have the same “x” pattern. And

  The terminal “2” in the flowchart shown in FIG. 12 and the terminal “4” in the flowchart shown in FIG. 14 are the terminal “2” and the terminal “4” in the flowchart shown in FIG. This algorithm is a process for arranging the “group C” shown in FIG. 6 and other image line groups.

  First, the template (C) shown in FIG. 16 in order from the upper left pixel based on the 0 and 1 information of the pixel of the binary image that is the first visible image (4) shown in FIG. Is applied. That is, when the pixel [h, v] matches the condition of 1, the template (C) shown in FIG. 6 is applied to the pixel [h, v].

  Next, based on the 0 and 1 information of the pixels of the binary image that is the second visible image (8) shown in FIG. 8B, the template (D shown in FIG. ) Is applied. That is, when the pixel [h, v] matches the condition of 1, the template (D) shown in FIG. 6 is applied to the pixel [h, v]. This process is performed on the entire image matrix space from the upper left pixel to the lower right pixel.

  As shown in FIG. 6, the image line (C) of the template (C) overlaps with the image line (AE) and the image line (BE). As a result, the combined line area of the image line (AE) and the image line (BE), the image line (C) and the image line (AE), or the image line (C) and the image line (BE) is required. A process of replacing with templates (EE) and (CEE) that have already reached the total image area is performed.

  Next, in the template application process, the template (AE) is applied to the pixel [h, v], the template (C) or the template (BE) is applied to the pixel [h, v], and the pixel When the condition that the template (C) is applied to [h, v] is matched, the pixel [h, v] is replaced with the template (CE). That is, as shown in FIGS. 17 and 18, the pixel indicated by the thick solid line in the pixel group to which the template (C) is applied is replaced with the template (CE).

  Next, when the template application process applies the template (AE) to the pixel [h, v] and the template (BE) is applied to the pixel [h, v], the pixel [h, v] v] is replaced with the template (EE). That is, as shown in FIG. 19, the pixel [h + 1, v] is the template (A ′), the pixel [h, v + 1] is the template (B ′), the pixel [h + 2, v + 1] is the template (B), and the pixel Pixel [h + 1, v + 1] in which [h + 1, v + 2] is in the arrangement of template (A) is replaced with template (EE). Alternatively, pixel [h + 1, v] is template (A), pixel [h, v + 1] is template (B), pixel [h + 2, v + 1] is template (B ′), and pixel [h + 1, v + 2] is template (A ′. The pixel [h + 1, v + 1] in the arrangement of) is replaced with the template (EE).

  Next, in the template application process, the template (AE) is applied to the pixel [h, v], the template (BE) is applied to the pixel [h, v], and the template is applied to the pixel [h, v]. When [C] matches the applied condition, the pixel [h, v] is replaced with the template (CEE). That is, as shown in FIG. 20, the pixel [h + 1, v] is the template (A ′), the pixel [h, v + 1] is the template (B ′), the pixel [h + 2, v + 1] is the template (B), and the pixel [H + 1, v + 2] is replaced with template (A), and pixel [h + 1, v + 1] is replaced with template (C), and pixel [h + 1, v + 1] is replaced with template (CEE). Alternatively, pixel [h + 1, v] is template (A), pixel [h, v + 1] is template (B), pixel [h + 2, v + 1] is template (B ′), and pixel [h + 1, v + 2] is template (A ′. ) The pixel [h + 1, v + 1] in which the pixel [h + 1, v + 1] is in the arrangement of the template (C) is replaced with the template (CEE). As a result, each template group is spread over the entire matrix space.

(Application of α image)
Next, application of the α image (9) will be described. The terminal “5” in the flowchart of FIG. 16 is the terminal “5” in the flowchart of FIG. As shown in FIG. 11, the α image (9) is applied after the terminal “5” in the flowchart. In the present embodiment, as shown in FIG. 10, the α image (9) is an 8-bit image having a gray level of 0 to 255, the center of the α image (9) has the highest density, and the four corners of the image are The concentration is set to be the lowest. Then, the first visible image (4) and the second visible image (8) shown in FIG. 8, and the first invisible image (5) and the second invisible image (6) shown in FIG. If there is an α image (9) in each template group applied to the entire matrix space, the pixel density [h, v] of the α image (9) is assigned to the area [h, v] of each template. Apply. Image Line (A), Image Line (A ′), Image Line (a), Image Line (B), Image Line (B ′), Image Line (b), Image Line (D), Image Line (C), Each area in the image line (AE), the image line (BE), the image line (EE), the image line (CE), and the image line (CEE) is changed to each image line according to the gray level of the α image (9). Applied. As a result, as shown in FIG. 5B, in each region, the image area increases or decreases from the center of each image line to the periphery of the image line in accordance with the gray level corresponding to highlight to shadow.

(Image output step)
Next, in the output step (ST5) in the output unit (T5), the print pattern unit (3) created by the calculation step is output by a storage device such as a hard disk or an image creation device which is a printing device such as a printer. An image output step is performed. The output unit (T5) may include a preview image display step for displaying the shape of the printed pattern portion (3) created by the calculation unit (T4) on the monitor screen.

(Confirmation of preview screen)
In the preview image display step, the user checks the preview screen shown in step S7 of FIG. 7 as necessary. The preview screen is a simple prediction of the calculation result. As shown in step S8, it is possible to return to the first step as necessary by checking the calculation result before the calculation. If there is no problem with the result, proceed to the next step.

(Output of 1-bit image)
The setting of the number of filter lines shown in step S9 of FIG. 7 and the setting of the output resolution of the template shown in step S10 are reflected in the output of the 1-bit image shown in step S12 of FIG. In the first embodiment, as described above, the output resolution is 6400 dpi, and the number of lines of the lenticular lens of the discriminator (2) is defined as equivalent to 75 lines / inch. A 1-bit image having a size of 84 × 84 pixels is arranged in the entire matrix space according to the position of each template, so that a 1-bit image optimized with a lenticular lens equivalent to 75 lines / inch can be output. The 1-bit image (10) shown in FIG. 21A is a 1-bit image output without applying the α image (9), and the 1-bit image (11) shown in FIG. It is a 1-bit image output by applying the image (9). As shown in FIGS. 21A and 21B, the first visible image (4), the second visible image (8), the first invisible image (5), and the second invisible image. The (6) and α images (9) are output as 1-bit images according to the arrangement and area of the image lines provided in each template. As can be seen from the difference between the 1-bit image (10) to which the α image (9) is not applied and the 1-bit image (11) to which the α image (9) is applied, the 1-bit image (11) is the α image (9). By application, it can be seen that the image area of each image line decreases according to the gray level of the α image (9).

  22A is a printed matter obtained by printing the 1-bit image (10) shown in FIG. 21A. FIG. 22B is a printed matter obtained by printing the 1-bit image (11) shown in FIG. Printed material. In addition, about the base material of a printed matter, a printing method, a printing material, a printing apparatus, etc., it does not limit at all.

  With respect to the printed pattern portion (3) shown in FIG. 22 (a), from the lenticular lens, the center line (7) of each lens of the lenticular lens matches the line (L1) in FIG. FIG. 23A shows a state in which the discriminating tool (2) is superimposed on the printed pattern portion (3) on the printed matter (1) and visually observed from the front. In this case, only the image line (A) is positioned on the center line (7) of the lenticular lens. Due to the characteristics of the lenticular lens, the image line (A) located at the center line (7) appears to expand, so that the first invisible image (5) appears in a visible state.

  Further, with respect to the printed pattern portion (3) shown in FIG. 22 (b), the lenticular lens so that the center line (7) of each lens of the lenticular lens coincides with the line (L1) in FIG. 13 or FIG. FIG. 23B shows a state in which the discriminating tool (2) composed of a lens is superimposed on the printed pattern portion (3) on the printed material (1) and visually observed from the front. Although the image line (A) appears to expand in the same manner as in FIG. 23A, the first invisible image (5) that is in a visible state by application of the α image (9) becomes the α image ( It can be seen that the line area is reduced according to the gray level of 9).

  From the lenticular lens, the center line (7) of each lens of the lenticular lens matches the line (L2) in FIG. 15 or FIG. 18 with respect to the printed pattern portion (3) shown in FIG. FIG. 24A shows a state in which the discriminating tool (2) formed is superimposed on the printed pattern portion (3) on the printed matter (1) and visually observed from the front. In this case, only the image line (B) is positioned on the center line (7) of the lenticular lens. Due to the characteristics of the lenticular lens, the image line (B) located at the center line (7) appears to expand, so that the second invisible image (6) appears in a visible state.

  Further, with respect to the printed pattern portion (3) shown in FIG. 22 (b), the lenticular lens so that the center line (7) of each lens of the lenticular lens coincides with the line (L2) in FIG. 15 or FIG. FIG. 24B shows a state in which the discriminating tool (2) composed of a lens is superimposed on the printed pattern portion (3) on the printed matter (1) and visually observed from the front. Although the image line (B) appears to expand as in FIG. 24A, the second invisible image (6) that is in a visible state by application of the α image (9) becomes the α image ( It can be seen that the line area is reduced according to the gray level of 9).

Next, as a second embodiment, a multi-bit image automatic generation program having monochrome continuous gradation or full color gradation will be described. Only differences from the first embodiment will be described.
(Second embodiment)

(Forgery prevention printed matter)
First, a printed matter obtained by printing a multi-bit format image having monochrome continuous gradation or full color gradation obtained by the automatic generation program according to the second embodiment will be described. As shown in FIG. 25, the authenticity can be easily discriminated by superimposing the discriminator (2) on the printed material (1) to express an invisible image in monochrome continuous tone or full color tone. It can be done.

  The visible image (4) of the printed pattern portion (3) is provided in advance in monochrome continuous gradation or full color gradation, which is the basis of the printed pattern portion (3). When the discriminating tool (2) is superimposed on the printed matter (1) with a predetermined angle (this is 0 degree), the first invisible image (5) as shown in FIG. Appears as a toned or full-color gradation visible image. When the discriminating tool (2) is superimposed on the printed matter (1) with an angle of 90 degrees with respect to a predetermined angle, the second invisible image (6) as shown in FIG. It appears as a continuous tone or full color tone visible image.

  As in the first embodiment, as shown in FIG. 26, the printed pattern portion (3) has a line area ratio that gradually decreases to 0% from the center toward the outermost periphery (G). It has become. That is, the first invisible image (5) shown in FIG. 27 and the second invisible image (6) shown in FIG. 28 are directed from the center toward the outermost periphery (G) in the printed pattern portion (3). The density decreases in synchronization with the line area ratio decreasing step by step. That is, continuous shading is provided on the entire printed pattern portion (3). This continuous shading in the entire printed pattern portion (3) is preliminarily provided in a monochrome continuous tone or full-color tone that is the basis of the printed pattern portion (3).

(Basic drawing line configuration)
In FIG. 29, the component of the printed matter of 2nd embodiment is expanded and shown. As shown in FIG. 29, the image line (A) forms the first invisible image (5), and the two image lines (A) are arranged symmetrically from the center in the unit (rectangle), respectively. Yes. The image line (B) forms a second invisible image (6), and the two image lines (B) are arranged symmetrically in the vertical direction from the center in each unit (rectangle). The image line (N) is disposed between the image line (A) and the image line (B). Further, the image line (C) forms a visible image (design: pattern), becomes an image line constituting the visible image (4) composed of arbitrary figures and characters as shown in FIG. ) Are arranged so that the center of the drawing line (C) is at the four corners.

(Template creation step)
The printed pattern portion (3) of the second embodiment is executed according to the flowchart shown in FIG. First, in the template creation step (ST1) by the image line creation unit (T1), the user selects a template shown in step S1 of FIG. The template according to the second embodiment is an image file in which the line elements shown in FIG. 29 are individually formed. As shown in FIG. 30, the template is set for each line element. In the second embodiment, as an example, the vertical and horizontal dimensions of each template are 40 × 40 pixels. In this case, when the final output resolution of the pattern of the second embodiment is 2400 dpi, the number of lines of the lenticular lens of the discriminator (2) is defined as equivalent to 60 lines / inch. This will be described in detail later.

  The template mainly includes a template (A) constituting an image line (A) for forming the first invisible image (5), and an image line (B) for forming the second invisible image (6). ), A template (C) that configures an image line (C) for forming a visible image (design: pattern), and a template that configures an image line (N) linked in accordance with the calculation result. (N)

(Image creation step)
Next, in the image creation step (ST3) by the image creation unit (T2), the user designates the visible image (4) shown in step S2 of FIG. Since the visible image (4) is a multi-bit format image having monochrome continuous gradation or full color gradation, it may be an 8-bit image, 24-bit image, 32-bit image, or other types of multi-value color images. In this specification, for convenience of explanation, a 24-bit image is described as an RGB image, and a 32-bit image is described as a CMYK image.

  The visible image (4) is for defining matrix space coordinates for arranging the template (C). What is the number of pixels of the vertical and horizontal dimensions of each template and the number of pixels of the visible image (4)? There is no relationship. For example, the visible image (4) shown in FIG. 32 is designated. This visible image (4) is an 8-bit image with 256 gray levels, and is composed of 5 × 5 pixels for the sake of simple explanation of the present invention. In practice, however, the resolution of the pattern is increased. Therefore, a larger number of pixels is used.

  Next, the user designates the first invisible image (5) shown in step S3 of FIG. If necessary, the second invisible image (6) shown in step S4 is designated. Since the first invisible image (5) and the second invisible image (6) are multi-bit format images having monochrome continuous gradation or full color gradation, an 8-bit image, 24-bit image (RGB image), and 32-bit image ( CMYK images) or other types of multi-valued color images. The number of pixels of the first invisible image (5) and the second invisible image (6) is the same as the number of pixels of the visible image (4). The first invisible image (5) and the second invisible image (6) are for defining matrix space coordinates for arranging the template (A) and the template (B). There is no relationship between the number of pixels of vertical and horizontal dimensions and the number of pixels of the first invisible image (5) and the second invisible image (6). For example, the first invisible image (5) shown in FIG. 33 (a) and the second invisible image (6) shown in FIG. 33 (b) are designated. The first invisible image (5) and the second invisible image (6) are 8-bit images with 256 levels of gray, and are combined with the visible image (4) to briefly explain the present invention. The number of pixels is 5 × 5. Actually, however, a larger number of pixels is used to increase the resolution of the pattern.

(Specify α image)
Next, the user designates the α image (9) shown in step S5 of FIG. The α image (9) is obtained by changing the visible image (4), the first invisible image (5), and the second invisible image (6) included in the printed pattern portion (3) shown in FIG. While providing the anti-counterfeit element, the image area ratio is brought down to 0% stepwise from the center of the screen pattern toward the outermost periphery (G).

(Parameter setting step)
Next, the user sets the number of filter lines shown in step S8 of FIG. 31 in the parameter setting step (ST2) by the item setting unit (T3). In the second embodiment, 60 lines / inch are used as described above. Next, the user sets “C”, “M”, “Y”, and “K” for each image line forming each invisible image and each image line forming each visible image. Next, the user sets the output resolution shown in step S9 of FIG. In this embodiment, it is 2400 dpi as described above.

(Calculation step)
Next, in the calculation step (ST4) by the calculation unit (T4), the user starts the image generation shown in step S10 of FIG. In image generation, the entire matrix space is constructed based on the layout rules of each template. The arrangement rule of each template is for constructing the entire matrix space by the following algorithm. Note that the template arrangement rules in the second embodiment are the pixel density of the visible image, the inverted pixel density of the average pixel density of the invisible image, and the pixel density of the visible image, which will be described later. Is an application.

  The start of image generation shown in step S10 of FIG. 31 is the main algorithm in the present invention, and will be described in more detail with reference to FIG.

(Apply each template)
First, on the condition that the visible image (4), the first invisible image (5), and the second invisible image (6) all have the same number of pixels, the upper left pixels [h + 0, v + 0] to [h + n, v + n 35 is executed in the order up to.

  If the first invisible image (5) has already been specified in step S4 in FIG. 31, the pixel density [h, v of the first invisible image (5) shown in FIG. ], The image line shape of the template (A) is applied. Further, the image line shape of the template (B) is applied to the pixel density [h, v] of the second invisible image shown in FIG. The template (N) has a pixel density [h, v] of the first invisible image (5) and an inverted pixel density of the average pixel density of the pixel density [h, v] of the second invisible image (6). The line shape is applied.

  Further, in step S4 of FIG. 31, the first invisible image (5) shown in FIG. 33A is designated, and the second invisible image (6) shown in FIG. Is not specified, or the first invisible image (5) shown in FIG. 33 (a) is not specified, and the second invisible image (6) shown in FIG. 33 (b) is not specified. ) Is specified, the image line shape of the template (N) is applied to the inverted pixel density of the pixel density [h, v] of the first invisible image (5) or the second invisible image (6). Is done.

  The application of each template will be specifically described. For example, as shown in FIG. 36, the horizontal axis represents the pixel density of the first invisible image (5) in five levels, and the vertical axis represents the pixel density of the second invisible image (6) in five levels. did. For the first invisible image (5), the template (A) is applied at each pixel density. For the first invisible image (5), the template (B) is applied at each pixel density. For example, when the pixel density of the first invisible image (5) is 191 and the pixel density of the second invisible image (6) is 255, the pixel density in the template (N) is 32. For example, when the pixel density of the first invisible image (5) is 127 and the pixel density of the second invisible image (6) is 63, the pixel density in the template (N) is 160.

  If the visible image (4) shown in FIG. 32 is designated in step S2 of FIG. 31, the line shape of the template (C) is set to the pixel density [h, v] of the visible image (4). Applies. FIG. 37 specifically shows the pixel density of the visible image (4) in five stages.

  Furthermore, when the α image (9) shown in FIG. 34 is designated in step S5 of FIG. 31, the pixel density [h, v] of the α image (9) is applied. That is, the pixel density [h, v] of the visible image (4), the pixel density [h, v] of the first invisible image (5), and the pixel density [h, v] of the second invisible image (6). The pixel density is determined according to the gray level characteristic (so-called density value) shown in FIG. For example, as shown in FIG. 38 (a), when the pixel density [h, v] of the α image (9) is 0, the gray levels are all the same, but as shown in FIG. 38 (b). When the pixel density [h, v] of the α image (9) is 63, 0 is 63 while 255 is 255. Further, as shown in FIG. 38C, when the pixel density [h, v] of the α image (9) is 127, 255 is 255 and 0 is 127. The same applies to FIG. 38 (d) and FIG. 38 (e).

(Output of 8-bit image)
In the second embodiment, as described above, the output resolution is 2400 dpi, and the number of lines of the lenticular lens of the discriminator (2) is defined as equivalent to 60 lines / inch. The vertical and horizontal dimensions of an 8 bit image of 40 × 40 pixels are arranged in the entire matrix space according to the position of each template, so that an 8 bit image optimized by a lenticular lens equivalent to 60 lines / inch can be output. The 8-bit image (14) shown in FIG. 39 (a) is an 8-bit image (14) output without applying the α image (9), and the 8-bit image (15) shown in FIG. 39 (b). Is an 8-bit image (15) output by applying the α image (9). As shown in FIG. 39A and FIG. 39B, the visible image (4), the first invisible image (5), the second invisible image (6), and the α image (9) The image is output as an 8-bit image according to the arrangement and area of the image line provided in the template. As can be seen from the difference between the 8-bit image (14) to which the α image (9) is not applied and the 8-bit image (15) to which the α image (9) is applied, the 8-bit image (15) is the α image (9). It can be seen that the pixel density of each image line changes according to the gray level of the α image (9) by application.

(Multi-channel output)
As described above, the image format includes an 8-bit image, a 24-bit image (RGB image), a 32-bit image (CMYK image), or other types of multi-value color images. Depending on the image format specified in steps S3 to S5 in FIG. 31, the number of times of starting generation of the image in FIG. 35 varies. For 8-bit images, processing is performed once for one channel, for 24-bit images (RGB images), three times for three channels, and for 32-bit images (CMYK images), four times for four channels. .

(Image output step)
Next, as in the first embodiment, in order to make the image obtained at the start of image generation in FIG. 35 into a print image, a threshold value array image having the same image size as the template shown in FIG. 30 in advance. (A pattern image for making a binary image for printing) is used. FIG. 40 is a critical value array image for converting a multi-bit format image such as an 8-bit image into a 1-bit image. As shown in FIG. 40 (a), each image line has a continuous tone reproduction region in which the gradation continuously increases or decreases from the center of the image line to the periphery of the image line. Ag), the image line (B) includes an area (Bg), the image line (N) includes an area (Ng), and the image line (C) includes an area (Cg). Furthermore, the image area ratio is set in a timely manner by these continuous tone reproduction regions. For example, in the area (Ag) of the image line (A), the image area ratio is continuously set within the components of one image line. That is, as shown in FIG. 40B, the area of the region (Ag) increases or decreases from the center of each image line in accordance with the gray level corresponding to the highlight to shadow. Note that the gray level according to the present embodiment has 256 levels. When the gray level is low (the density is high), the image line (A) exists in the entire area (Ag), and when the gray level is high (the density is low), the area (Ag) of the image line (A) decreases. . The same applies to the region (Bg) in the image line (B), the region (Ng) in the image line (N), and the region (Cg) in the image line (C).

  FIG. 41A shows a 1-bit image (12) obtained by applying the 8-bit image (14) shown in FIG. 39 (a) to the entire matrix space using the critical value array image shown in FIG. 40 (a). Is shown. FIG. 41 (b) shows a 1-bit image (15) obtained by applying the 8-bit image (15) shown in FIG. 39 (b) to the entire matrix space using the critical value array image shown in FIG. 40 (a). 13) is shown.

  FIG. 42A is a printed matter obtained by printing the 1-bit image (12) shown in FIG. 41A, and FIG. 42B is a printed one-bit image (13) shown in FIG. 41B. Printed material.

  For the printed pattern portion (3) shown in FIG. 42 (a), the discriminator (2) made of a lenticular lens is arranged so that the center line (7) of each lens of the lenticular lens coincides with the center of the template. FIG. 43A shows a state in which the printed pattern portion (3) on the printed material (1) is superimposed on the printed pattern portion (3) and visually observed from the front. Due to the characteristics of the lenticular lens, the image line (A) located at the center line (7) appears to expand, so that the first invisible image (5) appears in a visible state.

  Further, with respect to the printed pattern portion (3) shown in FIG. 42 (b), a discriminator (2) comprising a lenticular lens so that the center line (7) of each lens of the lenticular lens coincides with the center of the template. ) Is superimposed on the printed pattern portion (3) on the printed matter (1), and the state observed visually from the front is shown in FIG. The image line (A) appears to expand in the same manner as in FIG. 43 (a), but the first invisible image (5) that has become visible by applying the α image (9) becomes the α image ( It can be seen that the line area is reduced according to the gray level of 9).

  For the printed pattern portion (3) shown in FIG. 42 (a), the discriminator (2) made of a lenticular lens is arranged so that the center line (7) of each lens of the lenticular lens coincides with the center of the template. FIG. 44 (a) shows a state in which the printed pattern portion (3) on the printed matter (1) is overlapped and visually observed from the front. In this case, only the image line (B) is positioned on the center line (7) of the lenticular lens. Due to the characteristics of the lenticular lens, the image line (B) located at the center line (7) appears to expand, so that the second invisible image (6) appears in a visible state.

  Further, with respect to the printed pattern portion (3) shown in FIG. 42 (b), a discriminator (2) comprising a lenticular lens so that the center line (7) of each lens of the lenticular lens coincides with the center of the template. ) Is superimposed on the printed pattern portion (3) on the printed material (1), and the state visually observed from the front is shown in FIG. The image line (B) appears to expand in the same manner as in FIG. 44 (a), but the second invisible image (6) that has become visible due to the application of the α image (9) becomes the α image ( It can be seen that the line area is reduced according to the gray level of 9).

DESCRIPTION OF SYMBOLS 1 Printed matter 2 Discriminating tool 3 Print pattern part 4 1st visible image 5 1st invisible image 6 2nd invisible image 7 Center line 8 2nd visible image 9 alpha image 10 1 bit image 11 1 bit image 12 1 bit image 13 1 bit Image 14 8-bit image 15 8-bit image A Image line of template A A 'Image line of template A' Ag Area of image line A a Image line of template a a Area of image line a B Image line of template B B 'Template B' Bg Line B area b Template b line bg Line b area AE Template AE line BE Template BE line C Template C line Cg Line C area CE Template CE image Line CEE Template CEE drawing line D Template D drawing line Dg Drawing line D area E Template E drawing line Eg drawing line Streaked G outermost peripheral L1 centerline L2 centerline T1 streaked creating unit T2 image creating unit T3 item setting unit T4 calculation unit T5 outputs of regions EE template EE

Claims (2)

A plurality of units having an image line forming each of the invisible image and the visible image are arranged in a matrix on at least a part of the base material,
When a lenticular lens or a line filter is overlaid on an image line forming the invisible image, an anti-counterfeit printed matter having a continuous tone having a printed pattern portion in which the invisible image is visually recognized as a latent image is obtained. A method of creating using an image creation device having a creation unit, an image creation unit, an item setting unit, a calculation unit, and an output unit,
A template creation step of selecting and inputting a template that is a stroke to be applied to the visible image and the invisible image by the stroke creation unit, or creating by the calculation unit;
A parameter setting step for setting the output resolution of the template, setting the number of lines of the printed pattern portion, setting the coloring of the printed pattern portion, and the shape of the template for each setting item by the item setting unit;
The image creating unit inputs an alpha image that performs continuous shading processing on the entire printed pattern portion, an image that is the basis of the visible image, and an image that is the basis of the invisible image, or the arithmetic unit An image creation step to create,
Based on each image and the setting item, the calculation unit applies the template placement rule to each pixel of the visible image and the invisible image, and places the template in the unit. Calculating the printed pattern portion by arranging the units in the matrix according to the density value of the pixel density of the α image with respect to the pixel density of
An output step of outputting the printed pattern portion formed by the output unit. An anti-counterfeit printed matter creation program for causing an image creation apparatus having an image line creation unit, an image creation unit, an item setting unit, an operation unit, and an output unit to execute the creation method of an anti-counterfeit printed matter according to claim 1. And
A template creation step of selecting an image file that is a basis of the template by the image line creation unit and inputting or creating the template by the calculation unit;
A parameter setting step for performing setting of output resolution of the template, setting of the number of lines of the printed pattern portion, setting of coloring of the printed pattern portion and setting of the shape of the template for each setting item by the item setting unit; ,
Α image data of the α image that is subjected to continuous shading processing on the entire printed pattern portion by the image creating unit, visible image data that is the basis of the visible image, and invisible image data that is the basis of the invisible image And an image creation step of creating an input or the calculation unit,
Based on each image data and the setting item, the arithmetic unit applies a template file placement rule to each pixel of the visible image data and the invisible image data, and places the template file in the unit. A calculation step of arranging the units in the matrix and creating the data of the print pattern portion according to the density value of the pixel density of the α image data with respect to the pixel density of each pixel of the template file;
An output step of outputting the printed pattern portion based on the data of the printed pattern portion by the output portion; and causing the image creating apparatus to execute a method for creating a forgery-proof printed matter. program.

Images