JP2015047772A - Structure for exposing latent image for preventing counterfeit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suggest a structure for exposing a latent image for preventing a counterfeit because of a difficulty in foreseeing a basis image at a glance, movements of an appearing latent image in every direction, and no decrease in visibility under observation from any direction.SOLUTION: This invention relates to a structure for exposing a latent image for preventing a counterfeit to authenticate a security printed matter including a group of latent streaks that has an arrangement of a plurality of latent streaks formed by compressing an image that is a split of a basis image at a predetermined compressibility and has a plurality of dissimilar latent streaks with different pitches and/or streak widths, and a group of filter streaks that has an arrangement of a plurality of dissimilar filter streaks composing pairs with the dissimilar latent streaks. The structure for exposing a latent image for preventing a counterfeit is characterized in that the group of latent streaks has curved latent streaks and keeps adjacent latent streaks most approximate to be dissimilar, and in that a basis image where split images couple is exposed as a latent image by superposing the group of latent streaks on the group of filter streaks.

Description

  In the field of security printed matter such as banknotes, passports, securities, identification cards, cards, and passports that require an anti-counterfeit effect, the present invention is based on encryption by overlaying a specific filter on an image. Anti-counterfeit latent image display structure for reproducing images, its manufacturing method and software, and stable regardless of the light condition in the observation environment created by applying the anti-counterfeit latent image display structure The present invention relates to a latent image printed material that exhibits the animated effect.

  Security printed matter typified by banknotes, passports, securities, identification cards, and the like requires anti-counterfeiting technology in order to prevent duplication and forgery. These anti-counterfeiting technologies include a technology that reproduces information concealed when viewed with a specific authentication tool, although the image is meaningless at first glance.

  One of these anti-counterfeiting techniques is a technique called “scrambled image”. In this technique, as shown in FIG. 55, the base image (2) encrypted in the scrambled image (1) is reproduced by superimposing a specific filter image (6) on the scrambled image (1). Technology. Actually, only the scrambled image (1) is printed on the security printed material, and the discriminator confirms whether the base image (2) is reproduced by overlaying the filter image (6) as necessary. It is operated in the form of discriminating false. As an example of an actual security printed material using this technology, there is “Spain 1000 pesos banknotes (issued in 1992)”, and a lenticular (filter image (6)) with a specific number of lines on the bottom of the banknote. The characters “BANCODEESPANA” are reproduced.

  As shown in FIG. 56, the scrambled image includes a plurality of latent image lines (3 (1), 3 (2), 3 (3)... 3 () in which a part of the base image is divided in a specific direction. i)... 3 (n-1), 3 (n)). As shown in FIG. 57, this scrambled image is obtained by taking out the base image (2) contained in the frame (4) having a specific width (W2), compressing it to a specific width (W1) at a specific reduction ratio, The latent image lines (3) can be evenly arranged at a specific pitch P1. Note that the easiest method for scrambled image of the base image (2) is to superimpose a lenticular or microlens array on the base image (2), and the image sampled at that time becomes a scrambled image. For playback, the same lenticular can be superimposed on the scrambled image. As described above, the scrambled image is a technique for encrypting by dividing and compressing a specific base image.

  In addition, as one of the anti-counterfeiting techniques using this scrambled image, a base image that is invisible under diffuse reflection light is reproduced under specular reflection light and is reproduced by changing the observation angle. There is a moving image reproduction type latent image printed material (hereinafter referred to as “latent image printed material”) having a so-called “moving image visual effect” (see, for example, Patent Document 1).

  This technique is a technique in which a scrambled image and a filter image are integrated, and the same pattern as that of the filter image is formed by an image line having a ridge-like swell, and the scrambled image is formed thereon. Unlike a general scrambled image, the observer does not need to prepare a filter image separately, and can easily determine authenticity under visible light. Therefore, this technique is excellent in authenticity determination.

JP 2011-126028 A

  However, the latent image line (3) composing the scrambled image is usually composed of simple straight lines or pixels arranged in a matrix. In such a case, the scrambled image produced with a simple configuration is as shown in FIG. 55, even if the filter image (6) is not superimposed, the base image (2) encrypted at first glance (FIG. 55). In the example, there was a problem that the image of cherry blossoms and numbers) was foreseen. In addition, in the case of such a simple straight line latent image line (3), since the production method is known, forgery is possible even using commercially available image processing software, and resistance to forgery is low. There was a problem.

  Moreover, although the latent image printed matter described in Patent Document 1 is a technique that exhibits an excellent moving image effect under specular reflection light, the moving image effect and the principle of the appearance of the base image are normal. In order to use the contrast of light generated by reflection, the effect of light in the viewing environment is strongly influenced, and the moving image effect and visibility of the base image that appears are greatly affected by the environment in which the printed image is observed. There was a problem.

  More specifically, as shown in FIG. 58, the swelled image line having the image line direction in the third direction (direction S3 in the figure) is continuously arranged in the first direction (direction S1 in the figure). When the printed image is formed with the image line configuration being used, the reproduced base image exhibits a good moving image effect when light is incident from the first direction that is orthogonal to the image line direction. However, while the visibility of the base image is increased, the moving image effect is weakened when light is incident from the second direction (the S2 direction in the figure) or the third direction other than the first direction. The visibility of the base image is lowered. In particular, when light is incident from a third direction parallel to the image line direction, the moving image effect is the weakest and the visibility of the base image is the lowest.

  In particular, when light is incident only from the third direction parallel to the image line direction, the print image is not limited to the “desired effect is reduced” problem that the visibility of the base image and the moving image effect are reduced. The base image itself, which should be a reference for authenticity determination, is not visually recognized, but instead, the entire latent image element group corresponding to the scrambled image emerges weakly and is observed as an unclear image. There is a possibility that a fatal problem may occur in authenticity determination that another effect other than the above will occur, and the reliability itself as a forgery prevention technology may be lost.

  This cause is as follows. The technique described in Patent Document 1 has a structure in which a latent image element group corresponding to a scrambled image overlaps the surface of an image line having a bulge. In the latent image, the surface of a part of the image line having a bulge reflects specularly strongly, and the base image is reproduced by selectively sampling a part of the latent image element group superimposed on the surface, In addition, a moving image effect in which the base image appears to move is generated by changing the phase of the specularly reflecting surface of the image line having swell. Therefore, in order to produce the moving image effect, it is necessary that only a part of the narrow surface of the image line having the bulge is strongly regularly reflected.

  However, when light is incident on an image line that swells from a direction orthogonal to the image line direction, only a part of the surface of the image line that is perpendicular to the light of the image surface that swells strongly reflects the light regularly. On the other hand, when light is incident from a direction parallel to the image line direction, the range of the surface of the image line that reflects light is widened among the image surface surfaces that are raised, and in the worst case, the entire surface of the image line The light is reflected regularly evenly.

  For this reason, when light is regularly reflected in a wide range rather than a narrow part of the surface of the image line having the swell, there is a problem that the visibility of the latent image and the moving image effect are deteriorated, resulting in a swell. In the worst case where the entire surface of the image line uniformly reflects light regularly, there is a possibility that the entire latent image element group corresponding to the scrambled image is sampled and the latent image element group itself appears.

  As described above, according to the technique described in Patent Document 1, depending on the incident angle of light incident on the printed matter from the light source in the observation environment, the moving image effect may be weakened or the visibility of the latent image may be greatly reduced. In some cases, an unclear image may appear. Anti-counterfeiting technology given to security prints is a criterion for authenticity discrimination by people confirming their effects, and their effects and visibility are greatly affected by viewing conditions, and unexpected images Appearing was a big problem.

  The present invention aims to solve such a conventional problem. Compared to a conventional scrambled image, it is difficult to foresee a base image at first glance and forgery prevention is more difficult to counterfeit. A latent image appearance structure is provided. In addition, a manufacturing method and software for the manufacturing are provided. In addition, it is a latent image printed matter produced by applying this anti-counterfeit latent image appearance structure, and the appearance of the base image moves in all directions, so it has excellent movement variations, and from any direction Provided is a latent image printed matter in which the visibility of the base image does not deteriorate even when confirmed.

  In the present invention, a plurality of latent image lines formed by compressing an image obtained by dividing a base image at a predetermined reduction ratio are arranged, and have a plurality of non-similar latent image lines having different pitches and / or image line widths. An anti-counterfeit latent image display structure for authenticating a security print including a latent image line group and a filter line group in which a plurality of non-similar and corresponding non-similar filter image lines are arranged. The latent image line group has a curved latent image line, and adjacent latent image lines are the most similar non-similar shapes, and the latent image line group and the filter line group The forgery-preventing latent image display structure is characterized in that a base image in which the divided images are combined is displayed as a latent image by superimposing the divided images.

  Further, the latent image line group in the forgery-preventing latent image display structure of the present invention is a non-similar shape in which the maximum and minimum pitches and / or image line widths are two times or less.

  Further, at least a part of the latent image line group in the forgery-preventing latent image display structure of the present invention is such that the outermost latent image line is an arcuate curved line and the outermost latent image line. A non-similar shape continuously changing in a straight line toward the latent image line at the center end.

  The present invention includes a printed image on at least a part of a substrate, and the printed image includes a plurality of ridge-like image lines having at least one of light / dark flip-flop characteristics and color flip-flop characteristics, and a pitch and A latent image line group having a color different from the color of the hook-shaped image line group at the time of regular reflection on the mask-shaped image line group having a plurality of non-similar hook-shaped image lines having different image line widths. The saddle-shaped image line group is a non-similar shape in which adjacent saddle-shaped image lines have the closest approximation. A latent image line formed by compressing an image obtained by dividing an image at a predetermined reduction ratio has a shape corresponding to a saddle-shaped image line, and at least part of the saddle-shaped image line includes a latent image line. At least partly overlapped and the base image is observed when the substrate is observed under specular reflection light Appeared as latent images, be any direction by changing the substrate from the observation angle, a latent image printed matter characterized in that it appears to move the latent image.

  Further, the saddle-like image line group in the latent image printed matter of the present invention is characterized in that the maximum and minimum pitches and / or image line widths are non-similar shapes that are twice or less.

  In addition, at least a part of the saddle-like image line group in the latent image printed material of the present invention is an outermost saddle-like image line having an arcuate curved line, and the outermost-lined saddle-like image line is centered on the saddle-like image line. It is a non-similar shape continuously changing linearly toward the line.

  The present invention also provides a latent image line group in which a plurality of latent image lines are formed by compressing an image obtained by dividing a base image at a predetermined reduction ratio, and a plurality of filter lines that are paired with the latent image lines. By superimposing the filtered image line groups, a forgery prevention latent image display structure in which a base image obtained by combining the divided images is displayed as a latent image is provided with at least an input unit, a processing unit, and a storage unit. A method of manufacturing using a manufacturing apparatus provided with a step of inputting a filter image consisting of a group of filter image lines in which a plurality of filter image lines prepared in advance are input to the input unit or generating a filter image in the processing unit; A step in which an image is input to the input unit or created in the processing unit, and a base direction is stored as vector information for compressing at a predetermined reduction ratio when the base image is divided in order to create a latent image line. Generate image compression information A reference image compression information, a pixel position where the base image exists, and a reference position of a pixel constituting a latent image line using a preset compression coefficient to compress the base image, and a reference position A method for producing a forgery-preventing latent image display structure, comprising the step of generating a latent image line group by adding color information of a base image to pixels in

  Further, in the method for producing a forgery-preventing latent image display structure according to the present invention, the step of generating the basic image compression information includes the step of extracting the center line with respect to the filter image line, and for all the pixels in the filter image. And determining the center position of each pixel and associating the center position with the position on the center line where the center position is closest to the center line among all the pixels on the center line. And

  Further, the present invention provides a counterfeit-preventing latent image image table for causing an image forming apparatus including an input unit, a processing unit, a storage unit, and an output unit to execute the above-described method for manufacturing a counterfeit-preventing latent image image display structure. Software for producing a structure, wherein a base image is input by an input unit or a base image is generated by a processing unit to generate base image data, and a filter image prepared in advance by the input unit is input or processed by the processing unit A step of generating a filter image by generating a filter image data, and a processing unit for generating base image compression information data having a compression direction as vector information when the base image is divided and compressed at a predetermined reduction ratio And a processing unit that uses the base image compression information data, the position data of the pixels in which the base image exists, and a preset compression coefficient to form a latent image. A step of compressing the base image by obtaining a reference position of the pixels constituting the image, a step of adding color information of the base image to the pixel at the reference position by the processing unit to generate a latent image line group, and an output unit Outputting a latent image line group, and causing the image production apparatus to execute a method for producing a forgery-preventing latent image image display structure. Software.

  Furthermore, in the software for producing a forgery-preventing latent image image display structure according to the present invention, the step of generating the basic image compression information data includes a step of extracting a center line for the filter image line by the processing unit, and a processing unit, A step of obtaining a center position for all pixels in the filter image, and a position on the center line where the center position is closest to the center line among all the pixels on the center line by the processing unit, and the center position And a step of associating.

  The latent image line group in the anti-counterfeit latent image image display structure of the present invention does not need to be composed of straight lines as in the conventional scrambled image, and the line shape of each latent image line. Since the image line direction, line width, line pitch, etc. can be changed freely, it is difficult to foresee the encrypted base image at first glance and the forgery is more difficult is there.

  The latent image printed material of the present invention is not limited to a straight line extending in a certain image line direction as in the prior art, and is formed by a group of curved image lines forming various image line angles because it is formed in a non-similar shape. Therefore, with respect to light incident from all angles, an excellent moving image effect is produced at least in any part of the printed material, and the latent image is reproduced with high visibility. There is no incident angle at which the effect and visibility of the entire printed image are extremely reduced as in the case of technology, and true / false discrimination can be performed stably in any observation environment.

  The latent image printed matter of the present invention is not limited to a straight line extending in a certain image line direction as in the prior art, and is formed in a non-similar shape, and therefore the moving direction of the latent image is only in one direction. Without limitation, by changing the angle of the composition line group, it can be moved freely in any direction, and the restrictions on the animation effect design are small.

  The production method and software of the present invention can produce a latent image line group having a complicated shape in a short time, and even if it is a latent image image group having a complicated shape that is extremely difficult to produce manually, It is possible to produce a latent image line group having an accurate shape within a realistic time such that the base image appears as a latent image by superimposing with the filter line group.

3 shows a latent image line group in the forgery prevention latent image display structure of the present invention. The base image in the latent image display structure for forgery prevention of this invention is shown. The shape of the latent image line in the forgery prevention latent image display structure of the present invention is shown. 2 shows a part of an image included in a latent image line group in the forgery prevention latent image display structure of the present invention. A method for producing a latent image line in the latent image display structure for preventing forgery of the present invention will be described. A method for producing a latent image line group in the forgery prevention latent image display structure of the present invention will be described. Explanatory drawing of the image line direction etc. in the forgery prevention latent image image display structure of this invention is shown. The filter image line group in the latent image image display structure for forgery prevention of this invention is shown. The shape of the filter image line in the forgery prevention latent image display structure of the present invention is shown. The structure of the filter group in the latent image image display structure for forgery prevention of this invention is shown. The effect of the forgery prevention latent image display structure of the present invention will be described. 3 shows a latent image line group in the forgery prevention latent image display structure of the present invention. 2 shows a part of an image included in a latent image line group in the forgery prevention latent image display structure of the present invention. A method for producing a latent image line in the latent image display structure for preventing forgery of the present invention will be described. A method for producing a latent image line group in the forgery prevention latent image display structure of the present invention will be described. 3 shows a latent image line group in the forgery prevention latent image display structure of the present invention. An example of the filter image line group in the forgery prevention latent image image display structure of the present invention is shown. An example of the usage method in the forgery prevention latent image image display structure of this invention is shown. The latent image printed matter of this invention is shown. An outline of the structure of the latent image printed material of the present invention is shown. The shape of the saddle-like image line of the latent image printed matter of this invention is shown. The shape of the latent image line of the latent image printed matter of this invention is shown. The positional relationship of the overlap of the saddle-like image line group and the latent image line group of the latent image printed matter of the present invention is shown. The effect of the latent image printed matter of the present invention is shown. The direction of movement of the latent image of the latent image printed matter of the present invention is shown. The light reflection state of the latent image printed matter of the present invention is shown. The latent image printed matter of this invention is shown. An outline of the structure of the latent image printed material of the present invention is shown. The basic image of the latent image printed matter of this invention is shown. The shape of the saddle-like image line of the latent image printed matter of this invention is shown. The structure of the saddle-like image line group of the latent image printed material of this invention is shown. The shape of the latent image line of the latent image printed matter of this invention is shown. The image contained in the latent image line of the latent image printed matter of this invention is shown. The positional relationship of the overlap of the saddle-like image line group and the latent image line group of the latent image printed matter of the present invention is shown. The effect of the latent image printed matter of the present invention is shown. The shape change which arises in the latent image of the latent image printed matter of this invention is shown. The latent image printed matter of this invention is shown. An outline of the structure of the latent image printed material of the present invention is shown. The basic image of the latent image printed matter of this invention is shown. The shape of the saddle-like image line of the latent image printed matter of this invention is shown. The structure of the saddle-like image line group of the latent image printed material of this invention is shown. The shape of the latent image line of the latent image printed matter of this invention is shown. The image contained in the latent image line of the latent image printed matter of this invention is shown. The positional relationship of the overlap of the saddle-like image line group and the latent image line group of the latent image printed matter of the present invention is shown. The effect of the latent image printed matter of the present invention is shown. The block diagram which shows the structure of the apparatus used for preparation of the latent image printed matter of this invention is shown. The flowchart which shows the procedure in the preparation method and preparation program of the latent image printed matter of this invention is shown. The flowchart which shows the procedure in the preparation method and preparation program of the latent image printed matter of this invention is shown. In the description of the present invention, a definition of coordinates for representing a position in an image is shown. The filter image line and center line in the production method and production program of the latent image printed matter of the present invention are shown. An example of how to determine the re-neighbor center position acquisition position P in the latent image printed material production method and production program of the present invention will be described. An example of how to determine the re-neighbor center position acquisition position P in the latent image printed material production method and production program of the present invention will be described. An example of the correspondence between the re-neighbor center position acquisition position P and the closest position on the center line in the latent image printed material production method and production program of the present invention is shown. An example of a correspondence between a position in the base image and a position in the latent image line group image in the basic image compression processing in the latent image printed material production method and production program of the present invention is shown. The prior art is shown. The structure of a prior art is shown. The manufacturing method of a prior art is shown. The effect of conventional technology is shown.

(First embodiment)
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.

  First, an example of the latent image line group (1) in the forgery prevention latent image display structure will be described. FIG. 1 shows a latent image line group (1) of the present invention. The latent image line group (1) corresponds to a conventional scrambled image. The latent image line group (1) is constituted by a set of latent image line (3). The latent image line group (1) shown in FIG. 1 is obtained by dividing and compressing the base image (2) including the image of “three cherry blossom petals” and the number “2013” shown in FIG. 2 by a specific method. Formed. Comparing the same base image (2) with the scrambled image (1) of FIG. 55 produced by the conventional method, it is difficult to predict the base image (2).

  FIG. 3 shows a specific configuration of the latent image line group (1). The latent image line group (1) is configured by a plurality of latent image line (3) having shapes that are not similar to each other, that is, non-similar shapes. In the first embodiment, the latent image line (3 (a)) positioned at the center (on the line AA ′) of the latent image line group (1) is a straight line with both ends narrow and sharp. From the center toward the S1 direction in the figure, an extremely vertically long semi-elliptical latent image line (3 (b)), a slightly vertically long semi-elliptical latent image line (3 (c)), a vertically long latent image The shape slightly changes to the image line (3 (d)). In FIG. 3, only four latent image lines (3 (a), 3 (b) 3 (c) 3 (d)) are extracted from the latent image line group (1) and enlarged. In one embodiment, even in the latent image line (3) constituting one latent image line group (1), each line shape is different. In the first embodiment, all the latent image lines (3) included in the latent image line group (1) are not similar to each other but have a dissimilar shape. The configuration of the latent image line group (1) is not limited to this, and at least the latent image line line having a shape that is not similar to the latent image line line (3) included in the latent image line group (1). (3) may be included in part.

  Note that each latent image line (3) does not indicate only a black-painted image, but indicates a certain area including a non-image area where no surrounding image is formed. In the example of FIG. 3, the latent image line (3 (a)) at the center indicates the entire thin leaf-shaped region surrounded by the curve, and the semi-elliptical latent image lines (3 (b), 3 ( c) 3 (d)) refers to the entire horseshoe-shaped region surrounded by a curve.

  In the first embodiment, the latent image lines (3) are dissimilar to each other, but the latent image lines (3) in the adjacent positional relationship are separated from each other by a latent image line group ( It is desirable to have the most similar shape among all the latent image lines (3) included in 1). The reason for this is that in the present invention, the latent image line group (1) is formed using a plurality of latent image line lines (3) having a non-similar shape. Although the latent image lines (3) having completely different shapes are included, if the shapes of the adjacent latent image lines (3) are significantly different from each other, when the filter images (6) are overlaid, The image (2) may be distorted and the base image (2) may be reproduced in an unclear form. Therefore, in order to reproduce the base image (2) in a clear form with as little distortion as possible, at least the adjacent latent image lines (3) should be shaped as much as possible even if they are dissimilar shapes. It is desirable to resemble.

  In the first embodiment, since each latent image line group (1) has a different shape, the image line direction, the line width, and the pitch between each latent image line (3) are naturally different. . However, the line of the latent image line (3) having the largest line width among the line widths of the respective latent image lines (3) included in one latent image line group (1). It is desirable that the magnification of the image width of the latent image line (3) having the smallest image line width is 2 times or less, and similarly included in one latent image line group (1). As for the pitch between each latent image line (3), the magnification of the largest pitch and the smallest pitch is preferably 2 times or less. This is because if the image line width difference or the pitch difference is larger than this, the base image (2) that appears when the filter image (6) is overlaid may have a partial reduction in resolution or intensity. This is because the basic image (2) should be satisfied in order to reproduce the entire image without a sense of incongruity. Also, the image line width can be made thicker or thinner in one latent image line (3) as shown in the example shown by the latent image line (3 (a)) in the center in FIG. You can change it.

  Next, a more specific structure of the latent image line group (1) will be described, and a manufacturing method thereof will be described at the same time. As shown in FIG. 4, for the convenience of explanation, a portion obtained by encrypting the character “2013” which is a part of the latent image line group (1) is extracted and enlarged, and the structure of the portion is specifically described. explain. The portion representing “2013” in the latent image line group (1) enlarged in FIG. 4 includes n latent image line lines (3 (1), 3 (2), 3 (3)... 3 (i ) ... 3 (n-1), 3 (n)). Specifically, the first latent image line (3 (1)) having a specific line width (W1 (1)) is orthogonal to the line direction of the first latent image line (3 (1)). The second latent image line (3 (2)) having a specific line width (W1 (2)) is located at a position shifted by a specific pitch P1 (1) in the direction (S1 direction in the figure) A specific pitch P1 (2) is shifted from the second latent image line (3 (2)) in a direction (S1 direction in the figure) perpendicular to the image direction of the second latent image line (3 (2)). There is a third latent image line (3 (3)) with a specific line width (W1 (3)) at a position,... Having a specific line width (W1 (n−1)). Identification of direction (S1 direction in the figure) perpendicular to the image line direction of n-1 latent image line (3 (n-1)) to n-1th latent image line (3 (n-1)) Nth latent image line having a specific line width (W1 (n)) at a position shifted by P1 (n). (3 (n)). Each of the image line widths W1 (1), W1 (2), W1 (3),... W1 (n−1), W1 (n) may be the same value or different. In addition, the respective pitches P1 (1), P1 (2), P1 (3),... P1 (n-1), P1 (n) may be the same value or different.

  Each latent image line (3) has a structure in which the base image (2) is partially extracted and compressed along a direction orthogonal to the image line direction of the latent image line (3). Regarding the latent image line group (1) in the first embodiment, the shape of each latent image line (3) is different, and the images (black-filled portions) that appear are also different.

  The structure of the image represented by each latent image (3) will be clarified while explaining the production method. As an example, a specific method for producing the i-th latent image line (3 (i)) corresponding to the i-th counted in the first direction (S1 direction) from the first latent image line (3 (1)). This will be described with reference to FIG. For convenience of explanation, only the “2013 number” portion, which is a part of the latent image line group (1), will be described. First, with respect to “2013” as the base image (2), as shown in FIG. 5A, the i-th contour region (4) representing the contour of the i-th latent image line (3 (i)). (I)) is overlaid on a specific position. Each contour region (4) represents the contour of each latent image line (3).

  After determining the positional relationship between the i-th contour region (4 (i)) and the base image (2), the center line (4a (i)) of the i-th contour region (4 (i)) is determined. And a side (L) having a length equal to the distance (L / 2) in the direction orthogonal to the image line direction (direction S1 in the figure), and the target base image (2) is completely included. An i-th frame (4a (i)) having a height (H) is arranged. The base image (2) included in the range of the i-th frame (4a (i)) is set as the i-th in-frame image (5 (i)) as shown in FIG. This i-th in-frame image (5 (i)) is orthogonal to the image line direction of the center line (4a (i)) of the i-th contour region (4 (i)) as shown in FIG. 5 (e). Compressed at a constant compression rate toward the center line (4a (i)) with respect to the direction, the length (image line width) W0 in the direction orthogonal to the image line direction as shown in FIG. The i-th compressed frame image (5P (i)) is created. This i-th compressed frame image (5P (i)) is overlaid using the i-th contour region (4 (i)) as a mask as shown in FIG. A region where the inner image (5P (i)) and the i-th contour region (4 (i)) are overlapped becomes the i-th latent image line (3 (i)).

  The above-described method is repeated to produce the first latent image line (3 (1)) to the nth latent image line (3 (n)) as shown in FIG. A group. That is, each latent image line (3) refers to a compressed in-frame image (5P) by applying a specific frame (4a) to the base image (2) around the phase where each latent image line (3) is located. ), And finally, a superimposition region is taken out using the contour region (4) as a mask to obtain each latent image line (3). The latent image line (i) and the latent image line (i + 1), which are adjacent to each other with a pitch P1, are determined according to the shape of each latent image line at a position separated from the base image (2) by the pitch P1. This is a compressed stroke.

  As described above, the widths of the respective latent image lines (3) are different from each other, but the length in the direction orthogonal to the image line direction in the frame applied to each latent image line (3). The length (image line width) L is the same in any latent image image line (3), and the length (image line) in the direction orthogonal to the image line direction in each image (5P) in the compressed frame. The width W0 is the same for any latent image line (3). Therefore, the compression rate (W0 / L) of the base image (2) included in each latent image line (3) is the same. As for the height (H) of the frame, it is sufficient that there is a height that completely includes the target base image (2). The above is the configuration of the latent image line group (1) of the present invention and the manufacturing method thereof.

  The “image line direction” and the “direction orthogonal to the image line direction” in the present invention will be described. When the image line is a straight line, as shown in FIG. 7A, the image line direction is only one direction that is completely fixed, the direction coincides with the image line itself, and the direction orthogonal to the image line direction is The direction intersects the image line at 90 degrees. On the other hand, when the image line is a curve as shown in FIG. 7B, the image line direction continuously changes at each point. That is, the tangential direction of the curve at each point becomes the drawing direction, and the direction orthogonal to the drawing direction is the normal direction of the curve at each point (the direction from the point on the drawing to the outside at a right angle). Become.

  In constructing the latent image line group (1) constituting the present invention, the most different point from the conventional production method is that the respective in-compressed frame images (5P) are finally paired with contour regions (4). ) Masking and extraction. The reason why this step is necessary is as follows. In the latent image line group (1) of the present invention, since the line width and pitch of each latent image line (3) are different, the line width and pitch of each latent image line (3) are different. In addition, if the compression rate itself is changed for each latent image line (3), the base image (2) reproduced when the filter image (6) described later is overlaid will be distorted. The image will be unclear. As in the present invention, when the latent image line group (1) composed of the latent image line (3) having different line widths and pitches, compared to the prior art, is configured, Once all the images in the compressed frame (5P) have been created at the same compression rate, and masked with the contour region (4) to form the superimposed region and the latent image line (3), the base image (2) is created. Cannot play without distortion.

  Subsequently, in realizing the forgery-preventing latent image display structure of the present invention, a pair that is paired with the latent image line group (1) and encrypted in the latent image line group (1) is used. The filter image (6) necessary for reproducing the image (2) will be described. FIG. 8 shows an outline of the filter image (6), and FIGS. 9 and 10 show a specific structure of the filter image (6). The filter image (6) is constituted by a filter image line group (17) in which a plurality of filter image lines (7) paired with the latent image image lines (3) of the latent image image line group (1) are arranged. Become.

  In the present invention, the latent image line (3) and the filter line (7) form a pair when the filter line group (17) is arranged on the latent image line group (1). One filter image line (7) is arranged for one latent image line (3). Accordingly, the pitches of the latent image line group (1) and the filter image line group (17) in which the latent image line (3) and the filter line (7) forming a pair are arranged have the same relationship. .

  FIG. 9 shows the four latent image lines (3 (a), 3 (b) 3 (c) 3 (d)) shown in FIG. 3 and the four latent image lines corresponding to the respective latent image lines. Filter image lines (7 (a), 7 (b), 7 (c), and 7 (d)) are extracted. Each filter image line (7) basically has a structure in which the inside of the outline region (4) of the latent image image line (3) forming a pair is completely filled. The image line width (W2 (i)) of the filter image line (7) may be different from the image line width (W1 (i)) of the latent image line (3) forming a pair. However, the rate of change of the image line width (W2 (i) / W1 (i)) needs to be the same for all image lines.

  FIG. 10 shows the filter image line group (17) in an area paired with the latent image line group (1) shown in FIG. The filter image line group (17) in this area includes n filter image lines (7 (1), 7 (2), 7 (3)... 7 (i)... 7 (n−1), 7 (n)). Specifically, a direction orthogonal to the image line direction of the first filter image line (7 (1)) from the first filter image line (7 (1)) having a specific image line width (W2 (1)). There is a second filter image line (7 (2)) having a specific image line width (W2 (2)) at a position shifted by a specific pitch P1 (1) in the (S1 direction in the figure), and the second filter A specific pitch P1 (2) is shifted from the image line (7 (2)) in a direction orthogonal to the image line direction of the second filter image line (7 (2)) (direction S1 in the figure). There is a third filter image line (7 (3)) with an image line width (W2 (3)),... N−1th filter image having a specific image line width (W2 (n−1)). A specific pitch P1 (n) is shifted from the line (7 (n-1)) in the direction (S1 direction in the figure) orthogonal to the image direction of the n-1st filter image line (7 (n-1)). A specific image at the position There is a range (W2 (n)) the n-th filter picture lines (7 (n)).

  The filter image line (7) is paired with the above-mentioned latent image image line (3), and the first filter image line (7 (1)) is the first latent image image line (3 ( 1)) and the second filter image line (7 (2)) is paired with the second latent image image line (3 (2)) and the third filter image line (7 (3)) is paired with the third latent image line (3 (3))... (N−1) th filter image line (7 (n−1)) is n−1th. The latent image line (3 (n-1)) is paired, and the nth filter image line (7 (n)) is paired with the nth latent image line (3 (n)). It is in.

  The line widths W2 (1), W2 (2), W2 (3),... W2 (n−1), W2 (n) of each filter line (7) may be the same value or different. good. Also, the pitches P1 (1), P1 (2), P1 (3),... P1 (n-1), P1 (n) of each filter image line (7) may be the same value or different. May be. In addition, the image line widths W1 (1), W1 (2), W1 (3),... W1 (n-1), W1 (n) and the image lines of the respective filter image lines (7). The widths W2 (1), W2 (2), W2 (3),... W2 (n−1), W2 (n) may be the same value or different. On the other hand, the pitches P1 (1), P1 (2), P1 (3),... P1 (n-1), P1 (n) of the filter image line (7) and the latent image line (3) are Must be the same value. The above is description of the filter image (6) which consists of a filter drawing line group (17).

  For the filter image line group (17), the divided base image (2) is displayed as a combined image by superimposing with the above-described latent image line group (1). It is necessary to have a function (color, characteristic, etc.) that can sample (take out) a part of information of the image line group (1).

  Next, the effect when the latent image line group (1) and the filter image (6) of the present invention are overlaid will be described. As shown in FIG. 11A, when two images are overlapped with each other so that the latent image line (3) and the filter line (7) that make a pair overlap each other as shown in FIG. The base image (2) is reproduced. The effect that the base image (2) is reproduced by superimposing the latent image line group (1) and the filter image (6) is the same as that of the conventional scrambled image, but the image lines forming a pair overlap each other. Unless the images are superposed with a proper positional relationship, the base image (2) is not reproduced. This is very different from the conventional case where a scrambled image composed of simple straight lines is reproduced if the two images simply overlap in parallel. That is, even if the filter image (6), which is a discriminating tool for reproducing the latent image line group (1), is held, if the proper overlapping position is not known, the base image (2) is reproduced. I can't. Such an effect is particularly effective in the case of functioning as a technology with a higher security level that limits the discriminator compared to the conventional technology.

(Second embodiment)
Subsequently, as a second embodiment, it is an example of the configuration of the latent image line group (1) in the forgery prevention latent image image display structure, and is different from the first embodiment. The configuration of the group (1 ′) will be described. FIG. 12 shows the latent image line group (1 ′) of the present invention. The latent image line group (1 ′) is composed of a set of latent image line lines (3 ′). The latent image line group (1 ′) shown in FIG. 12 is a basic image (2) similar to that of the first embodiment, that is, the image of “three cherry blossom petals” and the number “2013” shown in FIG. Is formed by dividing and compressing the base image (2) including the image by a method different from that of the first embodiment. Since each latent image line (3 ′) in this latent image line group (1 ′) is mirrored by mirror inversion, the latent image of FIG. 1 produced from the same base image (2). Compared with the image line group (1), it is more difficult to foresee the base image (2).

  FIG. 13 shows a specific configuration of the latent image line group (1 '). As in the example of the first embodiment, the latent image line group (1 ') is configured by a plurality of latent image line lines (3') that are not similar in shape, that is, non-similar shapes. In the latent image line group (1 ′) in the second embodiment and the latent image line group (1) in the first embodiment, an image in each latent image line (3 ′) The basic outline region (4) shape, line width, line pitch, etc. are the same as those in the first embodiment, and a detailed description thereof will be omitted.

  Each latent image (3 ′), which is the difference between the latent image line group (1 ′) in the second embodiment and the latent image line group (1) in the first embodiment, is represented. The structure of the image will be clarified while explaining the production method. As an example, FIG. 14 shows a specific method for producing the i-th latent image line (3 ′ (i)) corresponding to the i-th counted in the S1 direction from the first latent image line (3 ′ (1)). I will explain. For the convenience of explanation, only the “2013 number” part, which is a part of the latent image line group (1 ′), will be described. First, with respect to “2013” as the base image (2 ′), as shown in FIG. 14A, the i-th contour region showing the contour of the i-th latent image line (3 ′ (i)). (4 ′ (i)) is overlaid on a specific position.

  After determining the positional relationship between the i-th contour region (4 ′ (i)) and the base image (2 ′), the center line (4a ′ ( i)) to a direction (S1 in the figure) orthogonal to the image line direction, each having a side (L) with a length equal to the distance (L / 2), and the target base image (2 ′) is An i-th frame (4a ′ (i)) having a height (H) that is completely included is placed. The process so far is exactly the same as the method of the first embodiment. In the second embodiment, the base image (2) included in the range of the i-th frame (4a ′ (i)) is mirror-inverted to form a mirror image as shown in FIG. This mirror image is defined as an i-th intra-frame image (5R ′ (i)). As shown in FIG. 14 (e), the mirrored i-th in-frame image (5R ′ (i)) is displayed in the i-th contour region (4 ′ (i)) as shown in FIG. With respect to the direction orthogonal to the image line direction of the center line (4a ′ (i)), compression is performed at a constant compression rate toward the center line (4a ′ (i)), as shown in FIG. An i-th compressed frame image (5P ′ (i)) having a length (image line width) W0 in a direction orthogonal to the image line direction is produced. As shown in FIG. 14F, the i-th contour region (4 ′ (i)) is applied to the i-th compressed frame image (5P ′ (i)) as in the first embodiment. ) As a mask, and an area in which the i-th compressed frame image (5P ′ (i)) and the i-th contour area (4 ′ (i)) are superimposed is the i-th latent image line (3 ′). (I)).

  By repeating the above-described method, the first latent image line (3 ′ (1)) to the nth latent image line (3 ′ (n)) can be produced. That is, as shown in FIG. 15, the same with respect to the center line (4 ′) of each contour region arranged with a phase shift in a specific direction (S1 direction) with respect to each base image (2 ′). A frame with a width L is applied, and the image included in the frame is mirrored and then compressed to create a compressed in-frame image (5P ′). Finally, the superimposed region is set using the contour region (4 ′) as a mask. By taking out each of the latent image lines (3 ′), a latent image line group (1 ′) is obtained. As described above, the difference between the latent image line group (1 ′) in the second embodiment and the latent image line (1) in the first embodiment is the latent image line (3) constituting each of them. '3) is whether or not the base image (2', 2) is a mirror image obtained by mirror inversion. The structure of the other latent image line group (1 ′) and the structure of the filter image line (6 ′) paired with the latent image line group (1 ′) are the same as those in the first embodiment. Since there is, explanation is omitted. When the same filter image (6 ′) as described in the first embodiment is superimposed on this latent image line group (1 ′), the base image (2 ′) is the same as in the first embodiment. Is played.

  The latent image line group (1) of the present invention can simultaneously use the configuration described in the first embodiment and the configuration described in the second embodiment. The latent image line group (1) shown in FIG. 16 has a structure in which the leftmost cherry blossom petals (2b) and the rightmost cherry blossom petals (2d) in the base image (2) are described in the first embodiment. That is, the structure in which the base image (2) is not mirrored and the other cherry blossom petals (2c) and the number (2a) in the center are the structures described in the second embodiment, that is, the structure in which the base image (2) is mirrored. It is said. As described above, two different structures of the structure described in the first embodiment and the structure described in the second embodiment may be combined for one base image (2).

  As a matter of course, the shapes of the filter image line group (17) and the latent image line group (1) (more specifically, the structure of the contour area (4) of the latent image line group (1)) are naturally understood. The structure is not limited to the structure described in the first embodiment and the second embodiment. FIG. 17 shows an example. For example, a structure that changes from a curved line to a straight line as shown in FIG. 17A, a structure in which a curved line changes to a curved line having a different shape, as shown in FIG. Each of the filter image line group (17) and the latent image line group (1), such as a structure that changes from a straight line to an ellipse as shown in (c) and a structure that changes from a circle to an ellipse as shown in FIG. In the filter image line (7) and the latent image image line (3) constituting the), it is only necessary that at least a part of the non-similar shapes exist. By including such a structure, it is possible to realize the anti-counterfeit latent image image display structure of the present invention in which the base image (2) is difficult to foresee and difficult to counterfeit compared to the conventional technique. it can.

  As an example of a specific form of providing this forgery-preventing latent image image display structure, as shown in FIG. 18, a latent image line group (1) is partially printed on a security print (8) to When false discrimination is necessary, it is only necessary to confirm that the base image (2) is reproduced by superimposing the filter image (6) applied to the transmissive base material by the information disclosure subject of the present technology. .

  When producing the latent image line group (1) having the latent image display structure for forgery prevention, it is desired to make the base image (2) an image that is difficult to foresee when the latent image line group (1) is viewed. If the creator thinks, in addition to making the shape of the latent image line group (1) more complex, the compression of the base image (2) included in each latent image line (3) It is desirable to set the rate (W0 / L) to a smaller value. When the value of the compression rate (W0 / L) is 1, the latent image line group (1) is the same image as the base image (2), and one latent image is obtained as the compression rate becomes smaller than 1. The information of the base image (2) included in the image line (1) increases, and as a result, even if the latent image image line group (1) is viewed, the base image (2) is changed to an image that is difficult to predict. In producing the latent image line group (1) having the latent image display structure for preventing counterfeiting, it is desirable to use a value of 0.01 or more and 0.5 or less for the compression rate.

  When the compression ratio exceeds 0.5, the base image (2) can be easily foreseen when the latent image line group (1) is viewed. When the compression ratio is less than 0.01, the latent image line group (1) is used. This is because, depending on the shape, the reproduced base image (2) may be distorted, resulting in an unclear image.

(Third embodiment)
Subsequently, a latent image printed material produced by applying the above-described anti-counterfeit latent image image display structure as a third embodiment will be described. This latent image print is a so-called “moving visual effect” in which a latent image corresponding to a base image is reproduced under specular reflection light, and the reproduced base image appears to move by changing the observation angle. Is provided. Basically, this is a technology that integrates the latent image line group and the filter line group with the above-described latent image display structure for preventing counterfeiting. A line is formed, and a latent image line group is formed on the line. Unlike the above-described latent image display structure for preventing counterfeiting, the observer does not need to prepare a separate filter image and can easily determine authenticity under visible light. Technology.

  FIG. 19 shows a latent image print (9 ″) of the present invention, and FIG. 19B shows a cross-sectional view of the latent image print (9 ″) along the line A-A ′. The latent image print (9 '') includes a printed image (11 '') on a substrate (10 ''). The substrate (10 ″) may be paper, plastic, metal or the like as long as the printed image (11 ″) can be formed, and the material is not limited. Further, the printed image (11 ″) may be transparent or colored, and the color is not limited.

  FIG. 20 shows an outline of the configuration of the print image (11 ″). The printed image (11 ″) includes a saddle-like image line group (6 ″) corresponding to the filter image (6, 6 ′) in the above-described anti-counterfeit latent image image display structure, and an anti-counterfeit latent image image display. The latent image line group (1 ″) in the structure is formed by overlapping. The laminated structure of the print image (11 ″) has a structure in which the latent image line group (1 ″) overlaps the saddle-shaped line group (6 ″).

  In the third embodiment, the same image as the filter image (6) used in the first embodiment is used for the configuration of the saddle-like image line group (6 '') of the latent image print (9 ''). The configuration of the latent image line group (1 '') of the latent image print (9 '') will be described using an example in which the same image as the latent image line group (1) is used in FIG.

  First, the saddle-shaped image line group (6 ″) will be described. As described above, the same image as the filter image (6) used in the first embodiment is used. As shown in FIG. 21, a plurality of bowl-shaped images having shapes that are not similar to each other, that is, non-similar shapes, respectively. Consists of a line (7 ″). The difference between the filter image line (7) in the filter image line group (17) and the image line (7 ″) in the printed latent image (9 ″) is that the image line (7 ″) is It is necessary to have a constant height in the height direction and to have optical characteristics described later, and the planar structure is the same as that of the filter image line (7).

  The saddle-shaped image line group (6 ″) having the above-described configuration is formed by a printing method capable of forming a bulge on the print image line. In order to ensure a certain level of visibility in the appearing latent image, the raised height of the saddle-shaped image line (7 ″) needs to be 3 μm or more, so it can be formed by screen printing or intaglio printing. Although desirable, gravure printing, flexographic printing, letterpress printing, etc., it is possible to form such a height of the image line. The upper limit of the height of the rise is not particularly limited, but is set to 1 mm or less in consideration of stability, friction resistance, distribution suitability, etc. when a large amount is loaded.

  Further, the saddle-shaped image line (7 ″) needs to have light / dark flip-flop property or color flip-flop property. The light / dark flip-flop property refers to the property of increasing the brightness when regularly reflected, and the color flip-flop property refers to the property of changing the hue. That is, the saddle-shaped image line (7 ″) needs to have a characteristic that the color greatly changes when the lightness or hue changes when light enters. The greater the change in color, the higher the visibility of the appearing latent image.

  Examples of methods for imparting light and dark flip-flop properties to the ridge-like image line (7 ″) having the above-described bulges include using a highly glossy ink resin or mixing a metal pigment in the ink. Can be realized easily. Examples of functional materials that can impart color flip-flop properties include pearl pigments, cholesteric liquid crystals, glass flake pigments, metal powder pigments, and scale-like metal pigments.

  Next, the latent image line group (1 ″) will be described. As described above, the same image as the latent image line group (1) shown in FIG. 16 is used, and as shown in FIG. 22, a plurality of latent image lines having non-similar shapes, that is, non-similar shapes, respectively. (3 ″).

  The swell is not essential for the latent image line (3 ″). Therefore, the latent image line (3 ″) may be formed by any printing method. In view of productivity, it is most preferable to form by offset printing. In order to visualize the base image (2 ″) that has been converted into a latent image under specular reflection, the latent image line (3 ″) is between the saddle-shaped line (7 ″) during specular reflection. A color difference needs to be generated, and at least the color at the time of reflection needs to be different from the color at the time of regular reflection of the saddle-shaped image line (7 ″).

  In addition, since the latent image line (3 ″) is formed on top of the bowl-shaped image line (7 ″), the bowl-shaped image line (7 ′) below the latent image line (3 ″) is formed. Blocks the light incident on ') and suppresses the color change of the saddle-shaped image line (7' ') generated under specular reflection light. Therefore, a large difference occurs in the color when specular reflection of the saddle-shaped image line (7 ″) depends on whether or not the latent image image line (3 ″) overlaps, so that the visibility of the latent image is further improved. Therefore, it is desirable that the latent image line (3 ″) has a high light blocking property.

  For this reason, when the latent image line (3 ″) is formed by printing, it is desirable to use a matte ink with low gloss. Further, when a functional material having a high light blocking property such as titanium is blended with these inks, a higher effect can be obtained.

  Further, since the latent image line (3 ″) is desirably invisible under diffuse reflection light, it is desirable that the latent image line (3 ″) has a colorless or translucent color. However, in order to facilitate quality control, the ink is colored by adding a slightly colored pigment, or the fluorescent pigment is added to the transparent ink. Can also be managed.

  In addition, the latent image line (3 ″) may be formed not only by a printing press using a printing plate but also by using a digital printing press such as a printer. Alternatively, the image corresponding to the latent image line (3 ″) can be formed by cutting the saddle-shaped image line (7 ″). Such cutting can be easily performed by using a laser processing machine. In many cases, the saddle-shaped image line (7 ″) irradiated with the laser loses or greatly deteriorates the light-dark flip-flop property and the color flip-flop property. )) Can be given the necessary properties. When these printers and laser processing machines are used, there is a feature that variable information that gives different information one by one can be easily given.

  The latent image print (9 ″) of the present invention is formed by superimposing the latent image line group (1 ″) on the saddle-shaped line group (6 ″). The positional relationship of the alignment will be described. FIG. 23 shows an appropriate positional relationship of the overlap between the two images of the saddle-like image line group (6 ″) and the latent image line group (1 ″). In the latent image print (9 ″), the latent image line (3 ″) needs to overlap the saddle-shaped image line (7 ″), but it is only necessary that the two image lines overlap. In other words, the saddle-shaped image line (7 ″) and the latent image line (3 ″) corresponding to each pair need to overlap each other. That is, as shown in the enlarged cross-sectional view of FIG. 23, the respective saddle-shaped image lines (7 ″ (i−1), 7 ″ (i), 7 ″ (i + 1), 7 ″ (i + 2)) Positional relationships in which latent image lines (3 ″ (i−1), 3 ″ (i), 3 ″ (i + 1), 3 ″ (i + 2)), which are in pairs with each other, overlap each other Is the most appropriate overlay positional relationship in the present invention.

  The positional relationship between the saddle-like image line group (6 ″) and the latent image line group (1 ″) may deviate from an appropriate positional relationship depending on the variation in printing during printing. Even in such a case, the effect of the present invention is exhibited as long as the saddle-shaped image line (7 ″) and the latent image image line (3 ″), which form a pair, overlap at least partially. The

  Next, the effect of the latent image printed material (9 ″) of the present invention will be described. FIG. 24 shows the effect of the present invention. Under diffuse reflected light where no strong light is incident on the print image (11 ″), the base image (2 ″) that is a latent image is invisible, and only the print image (11 ″) can be visually recognized ( Not shown). Under one specularly reflected light, a base image (2 ″) representing cherry blossom petals and numbers appears due to light contrast.

  As shown in FIGS. 24 (a), 24 (b), and 24 (c), by observing the latent image printed matter (9 ″) while changing the inclination of the incident light, the printed image (11 ″) The position of the base image (2 ″) changes, and the base image (2 ″) appears to move in a direction orthogonal to the saddle-shaped image line (7 ″) at each position. In the third embodiment, the left and right cherry blossom petals (2b, 2d) shown in FIG. 16 move toward the center of the circle as the inclination of the latent image print (9 ″) increases. The cherry blossom petals (2c) in the center appear to move toward the outer periphery, and the number 2013 appears to move from the A direction to the A ′ direction. Observation by changing the inclination of the latent image print (9 ″) with respect to incident light, that is, an effect of moving a part of the base image (2 ″) in different directions.

  The principle that produces the above effects will be described. For example, when light is incident from the direction of the A side of the latent image printed matter (9 ″), the surface of the ridge-like image line (7 ″) having a bulge forming the ridge-like image line group (6 ″) Among them, the light is strongly regularly reflected only on the surface of the image line corresponding to the A side from the center of each image line. On the contrary, the light is incident from the direction of the A ′ side of the latent image print (9 ″). In this case, among the surface of the saddle-shaped image line (7 ″), only the surface of the image line corresponding to the direction of the A ′ side from the center of each image line strongly reflects light.

  As described above, when an image line having a bulge such as a bowl-shaped image line (7 ″) reflects light, the light is focused on the surface of the image line that is normal to the incident light. In other words, the region where the light is strongly reflected on the surface of the image line having the rise changes according to the angle of the incident light.

  Since the latent image line (3 '') is formed on the surface of the saddle-shaped image line (7 ''), when the saddle-shaped image line (7 '') reflects light strongly, The latent image line (3 ″) and the saddle-shaped line (7 ″) superimposed on the image line change to different colors, and the latent image line (3 ″) that has been concealed until then. Is visualized by the difference in color.

  In this case, the latent image line (3 ″) to be visualized is formed by superimposing the latent image line (3 ″) on the region where the light is strongly reflected in the bowl-shaped image line (7 ″). ), And the latent image line (3 ″) formed by being overlaid on the other region remains hidden. For this reason, when light is incident, a region that strongly reflects light is formed only on a part of the surface of the image line (7 ″). Only the latent image line (3 ″) superimposed on is sampled and visualized. The sampling mechanism is the same as that when the filter image (6) is overlaid on the saddle-shaped image line group (1) in the above-described counterfeit-preventing latent image display structure, and as a result of sampling, the base image (2 The same image as '') is reproduced as a latent image.

  At this time, the latent image that appears when the width to be sampled, that is, the width of the region where each of the saddle-shaped image lines (7 ″) strongly reflects light is smaller, is the base image (2 ″). The outline is sharp and the entire image is clearly reproduced.

  On the other hand, when the width is wide, the image is closer to the latent image line group (1 ″), and the outline is blurred and reproduced in an unclear state. In order to prevent this state, it is necessary to narrow the area where the image line having each bulge reflects light strongly, and it is effective to increase the height of the image line having the bulge.

  When the observer's viewpoint moves or the latent image print (9 ″) is tilted, the light incident angle changes, so that the light on the surface of the saddle-shaped image line (7 ″) The region where the light is reflected also moves, and the region where the latent image line (3 ″) is sampled moves accordingly, so that the observer appears to move the base image (2 ″).

  Further, when the latent image line (3 ″) is mirrored and when it is not mirrored, the same base image (2 ″) is reproduced as the appearing latent image. However, since the arrangement direction of the image information of the base image (2 ″) in the latent image line (3 ″) is reversed, the directions of movement when tilted move in opposite directions.

  In addition, when viewing the latent image printed product (9 ″) directly, the right eye and the left eye are slightly different in the angle at which the incident light is reflected by the printed product and enters the eye. The surface of the line that reflects the light of 7 ″) is also slightly different. For this reason, the appearing latent image has different horizontal phases when viewed from the right eye and when viewed from the left eye, thereby producing a stereoscopic visual effect due to binocular parallax.

  For example, when the latent image is viewed from the left eye rather than viewed from the right eye, the latent image is felt to be in front of the surface of the printed material when it is on the right. On the contrary, when the latent image is viewed from the left eye than when viewed from the right eye, the latent image is felt to be deeper than the surface of the printed material when it is on the left.

  For this reason, when the latent image lines are formed using the latent image lines that are mirror-inverted by mirror-inverting each latent image line, not only the direction of movement of the latent image changes in the reverse direction, Perspective is also reversed. When the latent image line is not mirror-inverted, the appearing latent image appears to be present in front of the printed image itself. When the latent image line is mirror-inverted, the appearing latent image is printed. It feels like it exists behind the image itself.

  In this way, the perspective is reversed because the direction of the movement of the latent image changes in the reverse direction depending on the presence or absence of mirror inversion, and the position of the latent image captured by the right eye and the latent image captured by the left eye This is because the perspective due to binocular parallax is also reversed because the position is reversed.

  In order to generate this three-dimensional visual effect, it is essential to have an effect that the image moves in the horizontal direction when viewed from the observer. More specifically, this effect is enhanced by arranging them in the direction orthogonal to the direction connecting the left and right eyes of the observer.

  As described above, in the latent image printed material (9 ″) of the present invention, when the latent image printed material (9 ″) strongly reflects light, the base image (2 ″) appears as the latent image, This is a principle that produces a three-dimensional visual effect.

  One of the differences between the present invention and the prior art is the variety of directions of movement of the latent image. In the conventional technique, the direction of the image line having a swell is limited to one direction, and thus the moving direction of the latent image is limited.

  For example, as shown in FIG. 25A, when the image line direction of the image line having a bulge is the vertical direction, the latent image moves only in the horizontal direction, whereas, as shown in FIG. As described above, when the line direction of the line having the bulge is the horizontal direction, the latent image moves only in the vertical direction.

  In the latent image printed matter (9 ″) of the present invention, as shown in FIG. 25 (c), if the direction of movement of the latent image is determined in advance, a ridge-like image line (7 ″) having a bulge is obtained. By setting the image line direction to the image line direction orthogonal to the direction of motion, the latent image can be moved in the desired direction, and the degree of freedom in motion design is improved.

  Also, compared with the effect of moving the latent image in a certain direction as in the prior art, even if the latent image moved in the same distance, if the latent image moved in a plurality of different directions, The effect can be recognized more easily. For this reason, the discriminability essential for the authenticity discrimination technique has further increased.

  Further, in the prior art, as shown in FIG. 25A in particular, when the drawing direction of the ridge-like drawing line (7 ″) having a bulge is a vertical direction, for example, the third direction (FIG. When light is incident from the middle S3 direction, the latent image is sharply reproduced and an excellent moving image effect is produced. However, when light is incident from the second direction (the S2 direction in the figure), the latent image is reproduced. The image becomes a slightly blurred image and the movement becomes slow. When light is incident from the first direction (direction S1 in the figure), the latent image becomes an unclear image and almost no movement occurs. Disappear.

  Similarly, in FIG. 25B, the latent image becomes a blurred image and hardly moves with respect to light parallel to the image line direction. As described above, the conventional technique has an excellent effect at a specific light incident angle, but the effect is lost at a specific incident angle.

  On the other hand, in the latent image printed matter (9 ″) of the present invention, as shown in FIG. 25C, for example, when light is incident from the third direction (direction S3 in the drawing), the printed image ( In the region indicated by 11C in 3), the latent image is sharply reproduced and the moving image effect is also improved.

  When light is incident from the second direction (direction S2 in the figure), the latent image is sharply reproduced in the area indicated by 11B in the printed image (11 ″), and the moving image effect is also improved. When light is incident from the first direction (direction S1 in the figure), the latent image is sharply reproduced in the area indicated by 11A in the printed image (11 ″), and the moving image effect is good. Become.

  That is, even when light is incident at any angle from the first to the third, the latent image is sharply reproduced in at least a part of the printed image (11 ″), and the moving image effect is good. There is a certain area. In the conventional technique described in Patent Document 1, the effect is reduced at a specific incident angle of light, but the effect is reduced as a whole of the printed image (11 ″) in the latent image printed matter (9 ″) of the present invention. A configuration without an incident angle of light can be taken.

  In anti-counterfeiting technology that is desired to function for authenticity determination in various environments, it is important that the determination function is not lost under all conditions. The latent image printed material (9 ″) of the present invention It can be said that this effect satisfies the properties desired for anti-counterfeiting technology.

  Further, since the saddle-shaped image line (7 ″) is composed of non-similar image lines having different shapes, when the angle of incident light changes, the saddle-shaped image line group (6 '') The area that reflects the light changes, creating a beautiful light gradation.

  For example, to explain using the example of the third embodiment, when light is incident from the first direction as shown in FIG. 26, it is orthogonal to the incident light as shown in FIG. While the 11A region composed of the group of saddle-shaped image line groups (6 ″) strongly reflects light, the light amount decreases slightly in the 11B region as it moves away from the 11A region, and the 11C region is almost reflected. Does not produce light.

  In addition, when light is incident from the second direction, as shown in FIG. 26 (b), the region 11B composed of a set of saddle-shaped image line groups (6 ″) orthogonal to the incident light is strong. While reflecting light, the amount of light decreases slightly in the regions 11A and 11C as the distance from the region 11B increases.

  When light is incident from the third direction, as shown in FIG. 26 (c), the 11C region composed of a set of saddle-shaped image line groups (6 ″) orthogonal to the incident light strongly emits light. On the other hand, the amount of light decreases slightly in the region 11B as the distance from the region 11C increases, and almost no reflected light is generated in the region 11A.

  As described above, a gradation like a beautiful ring of light occurs depending on the angle of incident light. In addition, when the inclination of the latent image printed matter (9 ″) is changed, this light gradation appears to instantly rotate the ring of light in the printed image (11 ″) corresponding to the movement. Therefore, it is easy to catch the eye and has high discrimination. In order to enhance the effect of this light gradation, it is desirable to use a curve in which the image line direction changes greatly in each of the saddle-shaped image line groups (6 ″).

  Further, in the configuration of the prior art, when light is incident from a direction parallel to the drawing direction of the image line having a rise, for example, in the configuration illustrated in FIG. 25A, light is incident from the first direction. In addition, the latent image is blurred and does not produce a moving image effect, and the entire latent image line group is raised in the printed image due to the intensity of reflected light, so that an incomplete image can be viewed by an observer. There was a problem.

  This is because, in the configuration of the prior art, all the lines having swells have the same line direction, and therefore, when light is incident from a parallel direction, the reflected light is evenly uniform from the whole line having swells. This is because only the presence or absence of the latent image line group is more noticeable than necessary.

  In an anti-counterfeiting technology, the visualization of an unclear image that is not originally intended to appear is that a different effect other than the desired effect occurs, and the visibility of the latent image and the moving image effect are reduced. It was a big problem different from “decrease in desired effect”.

  In the latent image printed material (9 ″) of the present invention, for example, when light is incident from the first direction, a sharp latent image and an excellent moving image effect are generated in the region 11A, while the regions 11B and 11C. Then, the latent image becomes a blurred image, and the moving image effect is reduced, which is the same as the conventional technique.

  However, unlike the conventional technology, the printed latent image (9 ″) of the present invention is adjacent to the 11B and 11C regions rather than the intensity of reflected light caused by the presence or absence of the latent image line group (1 ″). Since the intensity of the reflected light in the 11A region and the intensity of the reflected light in the gradation of the light generated on the saddle-shaped image line (7 ″) are relatively stronger, the visibility of the latent image appearing in 11B and 11C Is relatively low, and in particular, images appearing in the 11C region are extremely difficult to recognize.

  For this reason, in the latent image printed material (9 ″) of the present invention, the entire latent image line group (1 ″) is difficult to float due to the intensity of reflected light as in the prior art, which is inconvenient for the observer. The problem of seeing a complete image has been greatly improved. This is one of the major differences from the prior art of the present invention.

  In particular, since each saddle-shaped image line (7 ″) and latent image image line (3 ″) can use image lines having different shapes and different shapes, for example, It is possible to use a saddle-shaped image line group (6 ″) and a latent image image line group (1 ″) having an image line configuration in which straight lines and curves are reasonably mixed as used in the third embodiment. Due to the characteristics of the present technology, when it is desired to enhance the stereoscopic effect of the latent image, the image line direction in the vertical direction (direction S1 in the figure: more specifically, the direction perpendicular to the direction connecting the left and right eyes of the observer) It is desirable to form each saddle-shaped image line (7 ″) and latent image image line (3 ″) with an image line having the above, while making it easier to recognize the movement of the appearing latent image. In other words, in order to enhance the moving image effect, it is desirable to form each saddle-shaped image line (7 ″) and latent image image line (3 ″) with curves including many image line directions.

  When each saddle-shaped image line (7 ″) and latent image image line (3 ″) are formed by image lines having similar shapes such as simple lines and curves as in the prior art, Only one of the three-dimensional effect and the moving image effect can be emphasized, but a saddle-like image line (7 ″) and a latent image image line (3 ″) are formed with non-similar image lines as in the present invention. In this case, for example, by using a saddle-shaped image line (7 ″) and a latent image image line (3 ″) having the structure shown in the third embodiment in which straight lines and curves are continuously changed. The two effects can be achieved without difficulty.

  Specifically, in the structure shown in the third embodiment, the lower part of the print image (11 ″) is formed by a straight line having an image line direction in the S1 direction. Since the upper part is composed of a curved line, the moving image effect can be emphasized in this region. Therefore, as in the present invention, the saddle-shaped image line (7 ″) and the latent image image line (3 ′) For '), the use of non-similar shapes with different shapes is the only way to achieve both two-dimensional effects and animation effects in a single print image (11' '). An effect can be obtained.

(Fourth embodiment)
Subsequently, similarly to the third embodiment, the latent image printed matter (9 ′ ″) is formed by applying the anti-counterfeit latent image display structure, and the printed image (11 ′ ″) is formed. An example in which not only the position of the latent image in () changes but also the shape of the latent image changes itself will be described.

  FIG. 27 shows a latent image print (9 ′ ″) according to the present invention, and FIG. 27B shows a cross-sectional view of the latent image print (9 ′ ″) along the line A-A ′. The latent image print (9 '' ') comprises a printed image (11' '') on a substrate (10 '' '). The substrate (10 ″ ′) may be paper, plastic, metal or the like as long as the printed image (11 ′ ″) can be formed as in the third embodiment. Any material is acceptable. The printed image (11 '' ') may be transparent or colored, and its color is not limited.

  FIG. 28 shows an outline of the configuration of the print image (11 ′ ″). The print image (11 '' ') is formed by overlapping the saddle-like image line group (6' '') and the latent image image line group (1 '' '). The layered structure of the print image (11 '' ') has a structure in which the latent image line group (1' '') overlaps the saddle-shaped line group (6 '' ').

  FIG. 29 shows a base image (2 ′ ″) according to the fourth embodiment. The basic image (2 '' ') is composed of 1250 character parts (2a' ') and chromatic patterns (2b' '). The greatest feature of the basic image (2 ′ ″) is the pattern of the chromatic portion (2b ′ ″), and one pattern is formed across almost the entire surface of the printed image (11 ′ ″). This is the biggest difference from the third embodiment. As described above, by arranging a large single symbol in the printed image (11 '' '), an effect different from that of the third embodiment is exhibited. This specific effect will be described later.

  First, the saddle-shaped image line group (6 ′ ″) will be described. As shown in FIG. 30, the saddle-shaped image line group (6 '' ') is configured by a plurality of saddle-shaped image lines (7' '') having shapes that are not similar to each other, that is, non-similar shapes. The saddle-shaped image line (7 ′ ″ (a)) at the center of the saddle-shaped image line group (6 ′ ″) has a linear shape with sharp ends, and the other saddle-shaped image lines (7 ′ '') Has an elliptical shape. As shown in FIG. 30, a structure in which the vertical and horizontal ratios of the elliptical shape in the saddle-shaped line (7 ′ ″) gradually change from the center of the saddle-shaped line group (6 ′ ″) to the outer periphery. Have

  FIG. 31 shows a part of the saddle-shaped image line group (6 ′ ″) extracted and enlarged. The saddle-shaped line group (6 ′ ″) in this area is composed of n saddle-shaped line lines (7 ′ ″ (1), 7 ′ ″ (2), 7 ′ ″ (3). 7 ′ ″ (i)... 7 ′ ″ (n−1), 7 ′ ″ (n)). Specifically, the first saddle-shaped image line (7 ′ ″ (1)) having the specific image-line width (W2 (1)) to the first saddle-shaped image line (7 ′ ″ (1)). A second saddle-shaped image line (7 ″) having a specific image line width (W2 (2)) at a position shifted by a specific pitch P2 (1) in a direction orthogonal to the image line direction (S1 direction in the figure). '(2)), and the direction perpendicular to the direction of the second hook-shaped image line (7' '' (2)) to the second hook-shaped image line (7 '' '(2)) ( In a position shifted by a specific pitch P2 (2) in the S1 direction in the figure, there is a third saddle-shaped image line (7 ′ ″ (3)) having a specific image line width (W2 (3)). ..The n-1 th hook-shaped image line (7 ′ ″ (n−1)) having a specific image line width (W2 (n−1)) to the n−1 th wrinkle image line (7 ′ '' (N-1)) a specific pitch P2 in a direction orthogonal to the direction of the image line (direction S1 in the figure) To n) shifted position, there is a semi-cylindrical image line of the n specific image line width (W2 (n)) (7 '' '(n)). The line widths W2 (1), W2 (2), W2 (3),... W2 (n−1) and W2 (n) of each bowl-shaped line (7 ′ ″) may be the same value. It may be different. Also, the pitches P2 (1), P2 (2), P2 (3),... P2 (n−1), P2 (n) of each bowl-shaped image line (7 ′ ″) have the same value. It may be different. The other conditions for the saddle-shaped image line (7 '' ') are the same as those in the third embodiment, and a description thereof will be omitted.

  Next, the latent image line group (1 ′ ″) will be described. As shown in FIG. 32, each shape is constituted by a plurality of latent image lines (3 ′ ″) that are not similar to each other, that is, have non-similar shapes. Each latent image line (3 ′ ″) has the same shape as the pair of bowl-shaped image lines (7 ′ ″), and the latent image line (3 ′ ″ (a )) Has a linear shape with both ends sharp, and the other latent image line (3 ′ ″) has an elliptical shape. Similarly to the saddle-shaped image line group (6 ′ ″) shown in FIG. 30, the latent image image line group (1 ′ ″) shown in FIG. 3 ′ ″) has a structure in which the aspect ratio of the elliptical shape gradually changes.

  FIG. 33 shows a part of the latent image line group (1 ′ ″) extracted and enlarged. The latent image line group (1 ′ ″) in this area is composed of n latent image line lines (3 ′ ″ (1), 3 ′ ″ (2), 3 ′ ″ (3). 3 ′ ″ (i)... 3 ′ ″ (n−1), 3 ′ ″ (n)). Specifically, the first latent image line (3 ′ ″ (1)) having the specific line width (W1 (1)) to the first latent image line (3 ′ ″ (1)). The second latent image line (3 ″) having a specific line width (W1 (2)) at a position shifted by a specific pitch P1 (1) in the direction orthogonal to the image line direction (S1 direction in the figure). '(2)), and a direction perpendicular to the image direction of the second latent image line (3' '' (2)) from the second latent image line (3 '' '(2)) ( There is a third latent image line (3 ′ ″ (3)) having a specific line width (W1 (3)) at a position shifted by a specific pitch P1 (2) in the S1 direction in the figure. .. The (n-1) th latent image line (3 ′ ″ (n−1)) to the (n−1) th latent image line (3 ′) having a specific line width (W1 (n−1)) '' (N-1)) deviated by a specific pitch P1 (n) in the direction perpendicular to the image line direction (direction S1 in the figure). The location, there is a specific image line width (W1 (n)) of the latent image picture line of the n (3 '' '(n)). Image line widths W1 (1), W1 (2), W1 (3),... W1 (n−1), W1 (n) of each latent image line (3 ′ ″) may be the same value. It may be different. Also, the pitches P1 (1), P1 (2), P1 (3),... P1 (n−1), P1 (n) of each latent image line (3 ′ ″) may be the same value. It may be different. Other conditions of the latent image line (3 '') are the same as those in the third embodiment, and the description thereof is omitted.

  The method described in the first embodiment and the second embodiment is used as the method for converting the base image (2 '' ') into the latent image line (3' ''). In the base image (2 ′ ″), the numeral portion (2a ′ ″) representing the characters 1250 uses the method described in the first embodiment in which the image is not mirrored, and the base image ( For the image representing the chromatic portion (2b ′ ″) of 2 ′ ″), the method described in the second embodiment for mirroring the image was used. Since a specific manufacturing method is the same as the method described in the first embodiment and the second embodiment, labor is saved.

  The positional relationship of the superposition of the saddle-like image line group (6 '' ') and the latent image image line group (1' '') of the latent image printed matter (9 '' ') of the present invention will be described. FIG. 34 shows a state in which the positional relationship of the overlap of the latent image line group (1 ′ ″) on the saddle-shaped line group (6 ″ ″) is appropriate. The positional relationship between the two images is the same as that of the third embodiment, and as shown in the enlarged cross-sectional view of FIG. 34, the respective saddle-shaped image lines (7 ′ ″ (i−1), 7 ′ '' (I), 7 ′ ″ (i + 1), 7 ′ ″ (i + 2)), and the latent image lines (3 ′ ″ (i−1), 3 ″) that are paired with each other. The positional relationship in which “(i), 3 ′ ″ (i + 1), 3 ′ ″ (i + 2)) overlap is the most appropriate positional relationship in the present invention.

  Next, the effect of the latent image printed material (9 ′ ″) of the present invention will be described. FIG. 35 shows the effect of the present invention. Under diffuse reflected light where no strong light is incident on the printed image (11 ′ ″), the base image (2 ′ ″), which is a latent image, is invisible as shown in FIG. Only the printed image (11 ′ ″) is visible. Under one specularly reflected light, a base image (2 '' ') representing chromatic patterns and numbers appears due to light contrast.

  As shown in FIGS. 35 (b), (c), (d), and (e), the printed image (9 ′ ″) is observed by changing the inclination of the latent image printed matter with respect to the incident light. 11 ″ ′), the position of the base image (2 ′ ″) changes, and the base image (2 ′ ″) moves in a direction orthogonal to the saddle-shaped image line (7 ′ ″) at each position. Looks like.

  FIG. 35B shows a state in which the latent image printed material (9 ′ ″) is tilted toward the upper side of the drawing under regular reflection light. In this case, the number (2a) in the base image (2 ′ ″) is shown. While the position of “″) does not change, the position of the chromatic pattern (2B ′ ″) in the base image (2 ′ ″) moves to the B ′ side. FIG. 35C shows a state in which the printed latent image (9 ′ ″) is tilted to the right side of the drawing under the regular reflection light, and in this case, the number ( 2a ′ ″) moves to the A ′ side, while the position of the chromatic pattern (2b ′ ″) in the base image (2 ′ ″) moves to the A side. FIG. 35 (d) shows a state in which the latent image print (9 ′ ″) is tilted downward on the B ′ side under specular reflection light. In this case, the number of the base image (2 ′ ″) is a number. While the position of (2a ′ ″) does not change, the position of the chromatic pattern (2b ′ ″) in the base image (2 ′ ″) moves to the B side. FIG. 35 (e) shows a state in which the latent image print (9 ′ ″) is tilted to the left side of the drawing under specular reflection. In this case, in this case, of the base image (2 ′ ″) The number (2a ′ ″) moves to the A side, while the position of the chromatic pattern (2b ″ ′) in the base image (2 ′ ″) moves to the A ′ side.

  As described above, the saddle-shaped image line (7 ′ ″) of the fourth embodiment has a configuration including a circle. Therefore, the latent image printed material (9 ′ ″) can be tilted in any direction by 360 degrees. ) The chromatic part (2b '' ') formed over the whole has a characteristic of moving in the direction corresponding to it. Further, as shown in FIGS. 35 (c) and 35 (e), when the latent image printed matter (9 ′ ″) is moved in the left-right direction, the numeral portion (2a ′ ″) and the chromatic portion (2b ′) The direction of movement of '') is the opposite direction. As shown in FIGS. 35 (a) and 35 (d), when the latent image printed matter (9 ′ ″) is moved in the vertical direction, the position of the numeral portion (2a ′ ″) does not change. The saddle-shaped image line (7 ′ ″) on which the numeric part (2a ′ ″) is printed is an image line having the image line direction in the vertical direction (BB ′ direction), and is the same as the image line direction. This is because there is no effect of moving the base image (2 ′ ″) in the vertical direction.

  Furthermore, in the fourth embodiment, for the chromatic pattern portion (2b ′ ″) in which one pattern is formed across almost the entire surface of the printed image (11 ′ ″), the third embodiment is applied. Not only the position of the image changes like the form, but also the shape of the image itself changes. The tendency of the shape change is as shown in FIG. 36 (a). In the configuration of the fourth embodiment, the shape is enlarged in the direction moving toward the circumference, and is reduced in the direction moving toward the center. This is an effect that occurs because the image line direction of the saddle-shaped image line (7 ′ ″) existing under the chromatic pattern portion (2b ′ ″) is different at each position, and the shape changes. With regard to, it can be arbitrarily designed by adjusting the direction of the drawing line (7 '' '). On the other hand, FIG. 36 (b) shows the direction of movement of the base image (2 ′ ″) in the prior art in which a bowl-shaped image line (7 ′ ″) is configured as a straight line. The shape of the image (2 ′ ″) does not change, and the entire base image (2 ′ ″) is simply translated while maintaining the shape. The effect of changing the shape of the base image (2 ′ ″) is an effect that cannot be realized by the conventional technique in which the direction of the image line is fixed in a certain direction, and is one of the unique effects of the present invention. is there. The above is the description of the fourth embodiment.

  In the configuration of the latent image printed material (9) of the present invention, the saddle-shaped image line (7) and the latent image image line (3) are curves whose image line direction continuously changes in order to improve the authenticity of the moving image effect. It is desirable to include at least a part. In this case, the curve preferably changes by at least 10 degrees as the angle of view, and more preferably changes by 30 degrees or more.

  This is because a change in angle of less than 10 degrees does not cause a significant difference in terms of effect compared to a printed matter in which a conventional straight line-shaped image is formed. The most effective configuration of the saddle-shaped image line (7) and the latent image image line (3) for enhancing the moving image effect is a circle having all image line directions of 360 degrees shown in the fourth embodiment. Is partly configured.

  The pitch of the saddle-like image line group (6) and the latent image image line group (1) in the printed latent image (9) of the present invention is 0.05 mm or more and 1.0 mm or less. A pitch of 0.05 mm or less is almost the limit of the pitch of the image line that can be reproduced by general printing when a ridge of 3 μm or more is formed on the saddle-shaped image line, and the stability of the print quality is improved. In addition, even if an image line can be formed at a pitch of 0.05 mm or less, in most cases, the visibility of the appearing latent image is extremely low, which is not appropriate. On the other hand, when the pitch is formed at a pitch of 1.0 mm or more, the resolution of an image that can be reproduced as a latent image is extremely low.

  Further, in producing the latent image line (7), the ratio of the length in the direction orthogonal to the image line direction (image line width) W0 / the frame length (L) in the compressed in-frame image (5P) ( By changing the compression ratio, the speed of movement and the size of the movement width of the appearing latent image can be controlled. When the W0 / L value (compression ratio) is designed to be small, the appearing latent image moves faster when tilted, and the range of motion increases, and when the compression ratio is designed to be large, the appearing latent image is displayed. When the image is tilted, it moves slowly and the width of the movement becomes small.

  However, the speed and width of movement and the sharpness of the appearing latent image are in a trade-off relationship. When the compression rate is designed to be small, the appearing latent image is compared with the base image (8). In contrast, when the compression ratio is designed to be large, the latent image that appears is a sharp image that reproduces the base image (8) almost as it is.

  In addition, the compression rate is not only related to the speed of movement, the width of the movement, and the sharpness of the appearing latent image, but is also related to perspective. That is, when the compression rate is designed to be small, the perspective of the appearing latent image is increased, and when the compression rate is designed to be large, the perspective of the appearing latent image is reduced.

  As described above, by changing the reduction ratio, the speed of movement and the width of movement, the sharpness of the latent image, and the perspective change. The range of specific numerical values of the reduction ratio depends on the complexity of the base image (8) and the width of the saddle-shaped image line (6), but it may be formed in a range of 0.02 to 0.5. desirable.

  If the compression ratio exceeds 0.5, the three-dimensional visual effect and the moving image visual effect become too low, and if it is less than 0.02, printing is performed when the image is compressed within the width of the latent image line (3). This is because the resolution often exceeds the reproducibility. In any case, it is necessary to select an appropriate numerical value according to the effect desired by the user.

  In the embodiment for carrying out the present invention, description has been made by taking a character as an example of a latent image. However, the present invention is not limited to this, and a symbol, a design, a design, or the like can be formed in addition to the character.

  In addition, specular reflection in this specification refers to a phenomenon in which strong reflected light is generated at an angle substantially equal to the angle of incident light when light is incident on a substance at an incident angle, and diffuse reflection is This refers to a phenomenon in which weak reflected light is generated at an angle different from the angle of incident light when light is incident on a substance at an incident angle.

(Latent image printed material production method and production software)
Next, an apparatus used for producing a forgery prevention latent image display structure according to an embodiment of the present invention will be described with reference to FIG. This manufacturing apparatus includes an input unit 101, a processing unit 102, a storage unit 103, and an output unit 104. The input unit 101 inputs data necessary for producing the forgery prevention latent image display structure according to the embodiment of the present invention, and supplies the data to the processing unit 102. The processing unit 102 stores the given data in the storage unit 103 and performs arithmetic processing, image processing, and the like necessary for producing the latent image display structure for forgery prevention, and outputs the obtained result to the output unit 104. give. The output unit 104 outputs the data given from the processing unit 102 to an external device such as a printing machine (not shown).

  A method of manufacturing the forgery prevention latent image display structure according to the present embodiment using such a manufacturing apparatus will be described with reference to FIG. The production method and software described below are equivalent to the latent image element group (corresponding to the “latent image line group (1)” of the present invention) described in Japanese Patent No. 5200284 already filed by the present applicant. ) And a group of elements having a protuberance (corresponding to “filter image line group (17)” of the present invention). Therefore, the latent image line group (1) and the filter line group (17) of the present invention described above are formed in a curved line shape, but are not limited to a curved line shape, and are described in Japanese Patent No. 5200284. The present invention can also be applied to a linear drawing line group.

  In the following description, a curved image line group which is the above-described anti-counterfeit latent image image display structure of the present invention will be described. In addition, all the image data to be handled is described as being configured by a plurality of pixels, but is not necessarily configured by pixels, and is configured by vector information such as continuous lines and continuous curves without pixels. It may be an image.

  Further, in the following description, for all image data to be handled, two orthogonal coordinate axes are defined in the image, and as shown in FIG. 49, the lower left axis of the image is the origin and the right axis is the x axis and the upper axis. Are defined as the y-axis. At this time, for all the data images to be handled, any position in each image can be expressed using the coordinates composed of the x component and the y component. Shall be used uniformly. Therefore, for example, positions having the same coordinates in different image data are expressed as “same positions”.

  First, as step S11, image data relating to the filter image (6) is created. Specifically, the processing unit 102 creates a filter image (6) composed of a group of filter strokes (17) in which a plurality of filter strokes (7) having a predetermined stroke width are arranged as image data, or is created in advance. The filtered image (6) is input from the input unit 101 as image data from the outside, and is stored in the storage unit 103 via the processing unit 102.

  Next, the base image compression information (15) is obtained by the processing unit 102 performing the base image compression information generation processing in step S21 on the filter image (6) stored in the storage unit 103. The basic image compression information (15) indicates in which direction the basic image is compressed when the latent image line group (1) is obtained by compressing the basic image (2) in the basic image compression processing in step S31. Contains information about the compression direction. The obtained basic image compression information (15) is stored in the storage unit 103.

  In step S12, the processing unit 102 creates the base image (2) as image data, or inputs it from the input unit 101 as image data created in advance from the outside and stores it in the storage unit 103 via the processing unit 102. . This process is performed before the basic image compression process in step S31.

  In step S31, the processing unit 102 performs base image compression processing using the base image (2) and the base image compression information stored in the storage unit 103. The image obtained by the basic image compression process is an image including the latent image line group (1), and this image is referred to as a latent image line group image. The latent image line group image obtained in this step is stored in the storage unit 103.

  Finally, in step S 41, the latent image line group image stored in the storage unit 103 is given to the output unit 104 via the processing unit 102.

  The processing method for obtaining the base image compression information (15) from the filter image (6) in the base image compression information generation processing in step S21 will be described in more detail with reference to FIG.

  In the basic image compression information generation process in step S21, first, the center line extraction process in step S211 is performed on the plurality of filter lines (7) constituting the filter line group (17) stored in the storage unit 103. The center line (14) is extracted from each filter image line (7) and stored in the storage unit 103.

  The center line (14) of the filter image line (7) and the center line extraction process will be described. The center line (14) of the image line here is obtained by thinning the image line or extracting a set of positions where the distance from the outline of the image line is maximized. It is a line that is created. These processing methods for obtaining the center line (14) are all general image processing techniques. For example, the processing methods are described in detail in the following documents. By performing this processing, for example, the center line (14) shown in FIG. 50 (b) can be extracted from the filter drawing line group (17) shown in FIG. 50 (a).

  Tamura Hideyuki, Computer Image Processing, Ohm Publishing Office, 2002

  Shinichi Murakami, Image Processing Engineering 2nd Edition, Tokyo Denki University Press, 2004

  In the following description, it is assumed that an independent image including a center line (14) composed of black pixels as shown in FIG. 50B is generated, and this image is called a center line image. An independent centerline image is not essential as long as information representing the shape of the image can be retained. For example, the shape information of the center line may be recorded in the filter drawing line group (17), or the shape information of the center line may be held as a function at the coordinates determined as described above, for example.

  Next, in step S212 re-neighbor center line position acquisition processing, the re-neighbor center position acquisition position P, which is a set of a plurality of positions P1, P2,..., Pn (n is an arbitrary natural number) automatically determined by the processing unit 102. Then, the nearest position among the center lines (14) stored in the storage unit 103 is obtained by calculation.

  The processing unit 102 can automatically determine each position P1, P2,..., Pn of the re-neighbor center position acquisition position P, but the filter stored in the storage unit 103 as shown in FIG. Normally, the center positions of all the pixels in the image line group (17) are set as the re-neighbor center position acquisition position P. If each position is determined such that the interval is wide, such as P1, P2,..., Pn ′ (n ′ is an arbitrary natural number smaller than n) shown in FIG. Compared with the case where P1, P2,..., Pn are determined as shown in a), the required calculation amount by the processing unit 102 is reduced and the processing speed is improved. The calculation error of the direction and the compression ratio becomes large, which affects the finally obtained latent image line group (1).

  Further, when the near-neighbor center position acquisition position P is automatically determined, P1, P2,..., Pn are not placed in an area where it is known that compression processing is not performed in the subsequent step S31 based image compression processing. It is possible to omit useless calculation. For example, as will be described later, the line shape of the latent image line (3) in the latent image line group (1) generated by the present production method is determined to match the line shape of the filter line (7). If this is the case, there is no need to perform compression processing on positions outside the filter image line (7), so P1, P2,..., Pn are defined only on the filter image line (7) as shown in FIG. Also good.

  For the positions P1, P2,..., Pn, the closest positions of the center line (14) are defined as Q1, Q2,. Examples of such P1, P2,..., Pn and Q1, Q2,..., Qn are shown in FIG. At this time, the method of obtaining the positions of Q1, Q2,..., Qn is not particularly limited, but for example, the round-robin distance from each position of P1, P2,..., Pn to each pixel constituting the center line (14) If all of the above are calculated, it takes a calculation time, but the positions of Q1, Q2,. In addition to the brute force method, Q1, Q2,..., Qn may be obtained mathematically by treating the shape of the center line (14) as a function.

  When there are a plurality of positions on the center line (14) that are closest to Pi (i is a natural number of 1 or more and n or less) that is one of P1, P2, ..., Pn, For example, as illustrated in FIG. 53 (b), the processing is particularly limited when there are two positions on the center line (14) that are closest to Pi, Qi ′ and Qi ″. For example, either Qi ′ or Qi ″ may be selected at random or by some predetermined method as Qi, or as shown in FIG. 53B, the vector PiQi ′ The position of Qi may be obtained by defining the vector obtained by adding the vector PiQi ″ to PiQi. The same applies when there are three or more positions on the center line (14) that are closest to Pi.

  Next, in the basic image compression information conversion processing in step S213, after calculating vector P1Q1, vector P2Q2, ..., vector PnQn from P1, P2, ..., Pn and Q1, Q2, ..., Qn, P1 and vector P1Q1, P2 and the vector P2Q2,..., Pn and the vector PnQn are stored in the storage unit 103 in association with each other. At this time, each vector P1Q1, vector P2Q2,..., Vector PnQn is defined as basic image compression information (15). The association here refers to obtaining the vector P1Q1 as the base image compression information (15) when the position of P1 is designated in the step after step S213 and the base image compression information (15) is referred to. The information is stored in the storage unit 103 in a state in which the vector P2Q2,..., The vector PnQn can be obtained as the base image compression information (15) for each position of P2,. It means that.

  When the base image compression information (15) is referred to by designating a position that is not any of P1, P2,..., Pn in the step after step S213, P1, P2,. Steps that make it possible to obtain vector information by performing interpolation processing on the vector P1Q1, vector P2Q2,..., Vector PnQn in the processing unit 102, the step S213 and subsequent steps, and the basic image compression in step S31. It may be provided before processing. The vector obtained by the interpolation processing in this way is also used as the basic image compression information (15). As the interpolation processing at this time, it is possible to use a general enlargement / reduction processing method of an image as it is, and for example, the nearest neighbor method, the bilinear method, and the bicubic method are generally known. ing.

  For example, if P1 and Q1 are determined in the base image compression information conversion process in step S212, the storage unit 103 stores P1 and the vector P1Q1 in association with each other in the re-neighbor centerline position acquisition process in step S213 as base image compression information. Therefore, it is not always necessary to execute step S213 after the complete completion of step S212.

  The basic image compression information generation process in step S21 includes the series of steps S211, S212, and S213 described above, and the basic image compression information (15) is obtained by performing these processes.

  The role played by the basic image compression information (15) thus obtained in the production of the latent image (3) in the present invention will be described.

  As described above, for the positions P1, P2,..., Pn, the closest positions of the center line (14) are defined as Q1, Q2,..., Qn. , Straight line P2Q2,..., Straight line PnQn are all perpendicular to the center line (14). Therefore, if the direction of the filter drawing line (7) is defined as the same as the direction of the center line (14) obtained from the filter drawing line (7), the straight line P1Q1, the straight line P2Q2, ..., the straight line PnQn are all filtered. It is orthogonal to the image line (7).

  Furthermore, if the line shape of the latent image line (3) in the latent image line group (1) generated by this production method is determined to match the line shape of the filter line (7), a straight line P1Q1, straight line P2Q2,..., Straight line PnQn are all orthogonal to the direction of the filter image line (7), that is, the image line direction of the latent image line (3).

  As described in the first embodiment and the second embodiment, in the present invention, the latent image line (3) is obtained by partially extracting the base image (2) and drawing the latent image image (3). Since it has a structure compressed along the direction orthogonal to the direction, the compression orthogonal to the image direction is performed along the same direction as the straight line P1Q1, the straight line P2Q2, ..., the straight line PnQn.

  The format of the base image compression information (15) stored in the storage unit 103 is not limited as long as it includes information equivalent to the straight line P1Q1, the straight line P2Q2,..., The straight line PnQn. The position information of P1, P2,..., Pn and the vector P1Q1, the vector P2Q2,..., The vector PnQn are described as being stored as the base image compression information (15).

  For the above reasons, the basic image compression information (15) is required as information for determining the image compression direction for each position when the latent image (3) is produced in the present invention.

  Next, a method for generating the latent image line group (1) from the base image compression information (15) and the base image (2) in the base image compression processing in step S31 will be described.

  Here, as an image for storing the newly generated latent image line group (1), the filter line group (17) has the same number of pixels in the x direction and the same number of pixels in the y direction. It is assumed that the latent image line group image (16) is automatically generated by the processing unit 102 and stored in the storage unit 103. Also, the latent image line group image (16) at the time of generation is assumed to include no image line at all. Here, the description will be made assuming that the line color is black in all the images handled, and therefore the latent image line group image (16) at the time of generation is composed of only white pixels. Further, description will be made assuming that the coordinate positions of the four corners of the latent image line group image (16) are the same as the coordinate positions of the four corners of the filter line group (17).

  In addition, when performing the basic image compression processing in step S31, it is assumed that the compression coefficient k is input from the outside of the production apparatus by the input unit 101 and stored in the storage unit 103 in advance. However, the compression coefficient k is a positive or negative number and is not 0. More preferably, k is a number other than 0 that is greater than −1 and less than 1.

  In the basic image compression processing in step S31, for any pixel constituting the latent image line group image (16), the position where the pixel exists is specified to obtain the basic image compression information (15), The reference position is obtained by performing calculation as described later using the existing position, the base image compression information (15), and the compression coefficient k. Next, the color information of the above-mentioned pixels constituting the latent image line group image (16) is overwritten with the color information of the pixels at the above-mentioned reference position in the base image (2). However, the color information referred to here is numerical information representing the brightness and / or color of a pixel in a general digital image, and each of red, green, and blue generally represented by a numerical value of 0 to 255. It is information composed of components or each component of cyan, magenta, yellow, and black.

  If the pixel of the base image (2) does not exist at the reference position, that is, the processing method when the reference position is outside the range of the base image (2) is not particularly limited, It is desirable to perform processing by regarding the color information of the base image (2) at the reference position as white that is a non-image color.

  The above-described processing in the basic image compression processing in step S31 is performed on all the pixels existing in the position in the latent image line (3) among the pixels constituting the latent image line group image (16). Thus, the latent image line group (1) is formed in the latent image line group image (16). As the shape of the latent image line (3), the image line shape of the filter image line (7) in the filter image line group (17) input in step S11 may be used as the shape of the latent image line (3). Alternatively, the input unit 101 may input in advance from outside the manufacturing apparatus.

  For an arbitrary pixel constituting the latent image line group image (16), when the position where the pixel exists is Pi and the base image compression information (15) obtained by designating the position Pi is a vector PiQi, A method for obtaining the reference position Pi ′ by calculation from the position Pi, the vector PiQi and the compression coefficient k will be described.

  At this time, the reference position Pi ′ desired to be calculated is expressed by the following equation using the vector QiPi ′, the vector QiPi, and the compression coefficient k. However, the vector QiPi is a vector directed from the position Qi to the position Pi and is a vector obtained by reversing the vector PiQi. Mathematically, the vector QiPi is obtained by multiplying the vector PiQi by -1.

  k × (vector QiPi ′) = vector QiPi = − (vector PiQi)

  The equal sign on the left side of the previous equation indicates that the vector QiPi is equal to a vector obtained by compressing or extending the vector QiPi 'by k times. When k is larger than −1 and smaller than 1 and is a number other than 0, the vector QiPi is a vector obtained by compressing the vector QiPi ′ by k times. FIG. 54 is a diagram showing an example of a correspondence relationship between the vector QiPi ′ and the vector QiPi, and an example in which k is larger than 0 with respect to the center line (14) having the same shape and Pi and Qi at the same position. FIG. 54A shows an example in which k is smaller than 0. FIG.

  At this time, since the straight line PiQi is orthogonal to the direction of the center line (14) as described above, when k is larger than 0, as shown in FIG. When compression is performed k times in the direction orthogonal to the center line (14) around the line (14), the pixel at the position Pi ′ before compression has moved to the position Pi after compression. If k is smaller than 0, as illustrated in FIG. 54B, an arbitrary image is mirror-inverted with respect to the center line (14) to form a mirror image, and then the mirrored image is converted to the center line. When the pixel is compressed in the direction orthogonal to the center line (14) by -k times around (14), the pixel at the position Pi ′ before the mirror inversion and compression is moved to the position Pi after the mirror inversion and compression. Has moved.

  Therefore, by performing the process of overwriting the color information of the pixel at the position Pi in the latent image line group image (16) with the color information of the pixel at the reference position Pi ′ in the base image (2), k becomes When it is larger than 0, the same effect as that obtained by applying the above-described compression processing to the base image (2) and storing it in the latent image line group image (16) is obtained. The same effect as that obtained by subjecting the base image (2) to the mirror inversion and compression processing and storing in the latent image line group image (16) can be obtained. Further, for all the pixels existing in the latent image line (3) in the latent image line group image (16), the above processing is performed with the position of each pixel as the position Pi. A latent image line group (1) is formed in the group image (16).

  In the basic image compression processing of step S31, the above processing when the compression coefficient k is larger than 0 corresponds to the method for producing the latent image line group (1) described in the first embodiment of the present invention. The above processing when the compression coefficient k is smaller than 0 corresponds to the method for producing the latent image line group (1) described in the second embodiment of the present invention.

  Finally, in the latent image line group output process in step S41, the latent image line group image (16) including the latent image line group (1) is output to the output unit (104).

  By performing the above steps, a latent image line group image (16) including the latent image line group (1) is obtained.

  Hereinafter, examples of the latent image printed matter produced in detail will be described in accordance with the above-described mode for carrying out the invention, but the present invention is not limited to these examples.

  FIG. 37 shows the latent image print (9-1) of the present invention, and FIG. 37 (b) shows a cross-sectional view of the latent image print (9-1) along the line A-A '. The latent image printed matter (9-1) includes a printed image (11-1) on the base material (10-1). As the substrate (10-1), general white coated paper (manufactured by Nippon Paper Industries Co., Ltd.) was used. The printed image (11-1) was composed of a color that is visually recognized as black under diffuse reflected light.

  FIG. 38 shows an outline of the configuration of the print image (11-1). The print image (11-1) was configured by superimposing the saddle-shaped image line group (6-1) and the latent image image line group (1-1). The laminated structure of the print image (11-1) was a structure in which the latent image line group (1-1) overlapped with the saddle-shaped line group (6-1). FIG. 39 shows a base image (2-1). The basic image (2-1) is composed of 1250 character parts (2a-1) and chromatic pattern parts (2b-1).

  First, the saddle-shaped image line group (6-1) will be described. As shown in FIG. 40, each shape is not similar to each other, that is, constituted by a plurality of saddle-shaped image lines (7-1) having non-similar shapes. About this shape, since it is the same as 4th Embodiment, description is abbreviate | omitted.

  FIG. 41 shows a part of the saddle-shaped image line group (6-1) extracted and enlarged. The saddle-shaped image line group (6-1) in this area includes n saddle-shaped image lines (7-1 (1), 7-1 (2), 7-1 (3)... 7-1 ( i)... 7-1 (n-1), 7-1 (n)). Specifically, the first saddle-shaped image line (7-1 (1)) having an image line width of 0.4 mm is orthogonal to the image line direction of the first saddle-shaped image line (7-1 (1)). A second bowl-shaped image line (7-1 (2)) having an image line width of 0.4 mm is arranged at a position shifted by 0.6 mm in the direction (S1 direction in the figure), and the second bowl-shaped image line The image line is at a position shifted from (7-1 (2)) by a pitch of 0.59 mm in the direction orthogonal to the image line direction of the second bowl-shaped image line (7-1 (2)) (direction S1 in the figure). A third saddle-shaped image line (7-1 (3)) having a width of 0.39 mm is arranged, the image line width and pitch are set slightly smaller toward the center, and the image line is formed at the center of the image. The width is 0.3 mm, the pitch is 0.45 mm, and the line width and pitch are greatly changed from the center toward the outer periphery again. 7-1 (n 1)) to the position where the pitch is shifted by 0.6 mm in the direction (S1 direction in the figure) perpendicular to the direction of the image line of the (n-1) -th line-shaped image line (7-1 (n-1)). A 0.4 mm-th n-shaped image line (7-1 (n)) was formed.

  The saddle-shaped image line group (6-1) having the above-described configuration was printed on the substrate (2) by screen printing using the UV drying type screen ink shown in Table 1. The ink shown in Table 1 has an excellent color flip-flop property that looks black as a color of a colored pigment under diffuse reflected light but changes to gold as an interference color of an iris pearl pigment under regular reflected light. Ink. The raised height of the scissors (7-1) formed with this ink was about 10 μm.

  Next, the latent image line group (1-1) will be described. As shown in FIG. 42, each shape is constituted by a plurality of latent image lines (3 '' ') that are not similar to each other, that is, non-similar shapes. Since this shape is the same as that of the fourth embodiment, description thereof is omitted.

  FIG. 43 shows a part of the latent image line group (1-1) extracted and enlarged. The latent image line group (1-1) in this region includes n latent image line (3-1 (1), 3-1 (2), 3-1 (3)... 3-1 ( i)... 3-1 (n-1), 3-1 (n)). Specifically, the first latent image line (3-1 (1)) having an image line width of 0.4 mm is orthogonal to the line direction of the first latent image line (3-1 (1)). A second latent image line (3-1 (2)) having a line width of 0.4 mm is arranged at a position shifted by 0.6 mm in the direction (direction S1 in the figure), and the second latent image line The image line is at a position shifted from (3-1 (2)) by a pitch of 0.59 mm in the direction orthogonal to the image line direction of the second latent image line (3-1 (2)) (direction S1 in the figure). A third latent image line (3-1 (3)) having a width of 0.39 mm is arranged, and the line width and pitch are set slightly smaller toward the center, and the image line is set at the center of the image. The width is 0.3 mm, the pitch is 0.45 mm, and the image line width and the pitch are greatly changed from the center toward the outer periphery again. Finally, the (n−1) -th latent image image line having an image line width of 0.4 mm ( 3-1 (n-1)) to No. −1 latent image line (3-1 (n−1)) in the direction perpendicular to the image line direction (direction S1 in the figure) at a position shifted by 0.6 mm in pitch, the nth image line width of 0.4 mm. The latent image line (3-1 (n)) was formed.

  44. The latent image line group (1-1) having the above-described configuration is a wet offset printing system using a transparent mat ink (manufactured by Matte Media T & K TOKA), as shown in FIG. (7-1) and the latent image line group (3-1) are overlapped with each other so that the image line centers of the latent image line group (3-1) and the latent image line group (1-3) overlap each other. A latent image print (1-11) was formed.

  The effect of the latent image printed material (9-1) of the present invention produced by the above procedure will be described. FIG. 45 shows the effect of the present invention. Under diffuse reflected light where no strong light is incident on the print image (11-1), the base image (2-1), which is a latent image, is invisible as shown in FIG. Only (11-1) was visible. Under one specularly reflected light, the entire printed image (11-1) emitted a golden interference color, while the base image (2-1) representing the chromatic pattern and numbers appeared in black.

  FIG. 45B shows a state in which the latent image printed material (9-1) is tilted toward the upper side of the drawing under specular reflection light. In this case, the number (2a-1) in the base image (2-1) is shown. ) Did not change, but the color pattern (2B-1) of the base image (2-1) moved to the B ′ side while changing the shape. FIG. 45 (c) shows a state in which the latent image printed material (9-1) is tilted to the right side of the drawing under the regular reflection light, and in this case, the number (2a−) in the base image (2-1). While 1) moved to the A ′ side, the chromatic pattern (2b-1) of the base image (2-1) moved to the A side while changing the shape. FIG. 45D shows a state in which the latent image printed material (9-1) is tilted toward the lower side of the drawing under specular reflection light. In this case, the number (2a-) in the base image (2-1) is shown. While the position of 1) did not change, the chromatic pattern (2b-1) of the base image (2-1) moved to the B side while changing the shape. FIG. 35 (e) shows a state in which the latent image printed material (9-1) is tilted toward the left side of the drawing under specular reflection light. In this case, in this case, the number ( 2a-1) moved to the A side, while the chromatic pattern (2b-1) of the base image (2-1) moved to the A ′ side while changing the shape.

  As described above, the produced latent image printed matter (9-1) is a base image that represents chromatic patterns and numbers while the entire printed image (11-1) emits a gold interference color under specular reflection light. (2-1) appeared in black, and it was confirmed that the position and shape of the internal chromatic pattern and numbers were changed by changing the inclination of the latent image print (9-1) under specular reflection light.

1, 1 ′, 1 ″, 1 ′ ″, 1-1 latent image line group 2, 2 ′ ″, 2-1 base image 3, 3 ′, 3 ″, 3 ′ ″, 3- 1 latent image line 4, 4 ′ contour region 4f, 4f ′ frame image 5, 5R ′ intra-frame image 5P, 5P ′ compressed intra-frame image 6, 6 ′ filter image 6 ″, 6 ′ ″, 6-1 Spider-like image line group 7, 7 'Filter image line 7'',7''', 7-1 Spider-like image line 8 Security printed matter 9 '', 9 ''', 9-1 Latent image printed matter 10'', 10 ′ ″, 10-1 Base material 11 ″, 11 ′ ″, 11-1 Print image 12 ″, 12 ′ ″, 12-1 Light source 13 ″, 13 ′ ″, 13-1 Observation Viewpoint 14 center line 15 base image compression information 16 latent image line group image 17 filter line group

Claims (12)

A plurality of latent image lines formed by compressing an image obtained by dividing the base image at a predetermined reduction ratio, and having a plurality of non-similar latent image lines having different pitches and / or line widths. A group of lines,
An anti-counterfeit latent image image display structure for authenticating a security print including a plurality of filter image lines in which a plurality of non-similar filter image lines that are paired with the non-similar latent image image line is arranged. And
The latent image line group has a curved latent image line, and the adjacent latent image lines are non-similar shapes that are closest to each other,
A forgery-preventing latent image image display structure, wherein a base image obtained by combining the divided images is displayed as a latent image by superimposing the latent image line group and the filter image line group. . 2. The forgery-preventing latent image display structure according to claim 1, wherein the latent image line group has a non-similar shape in which the maximum and minimum pitches and / or line widths are twice or less. In at least a part of the latent image line group, the outermost latent image line is an arcuate curved line and is continuous from the outermost latent image line to the central latent image line. 3. The forgery-preventing latent image image display structure according to claim 1, wherein the structure is a non-similar shape that is linearly changed. The forgery prevention device according to any one of claims 1 to 3, wherein the latent image line group includes at least the latent image line that is mirror-inverted about the center of the latent image line. Latent image display structure. Provide a printed image on at least a part of the substrate,
The printed image has a plurality of saddle-shaped image lines having at least one of light and dark flip-flop characteristics and color flip-flop characteristics, and the similar saddle-shaped image lines having different pitches and / or image line widths. A latent image line group having a color different from the color of the hook-shaped line group at the time of regular reflection is laminated on the vertical line group having a plurality of
The saddle-shaped image line group has the curved saddle-shaped image line, and the adjacent similar saddle-shaped image lines are non-similar shapes,
The latent image line group is formed by compressing an image obtained by dividing a base image at a predetermined reduction ratio and arranging a plurality of latent image line lines that are paired with the non-similar saddle-shaped line,
At least a part of the latent image line is formed on at least a part of the bowl-shaped line,
When the base material is observed under specular reflection light, the base image appears as a latent image, and the latent image appears to move when the base material is changed from the observation angle. Printed image. 6. The latent image printed matter according to claim 5, wherein in the saddle-shaped image line group, the maximum and minimum pitches and / or image line widths are two or less dissimilar shapes. In the saddle-shaped image line group, the outermost saddle-shaped image line is an arcuate curved line, and is continuously linear from the outermost-lined saddle-shaped image line toward the central saddle-shaped image line. The latent image printed matter according to claim 5, wherein the latent image printed matter is a non-similar shape changed to. The latent image printed matter according to any one of claims 5 to 7, wherein the latent image line group includes at least the latent image line that is mirror-reversed about the center of the latent image line. . A latent image line group in which a plurality of latent image lines are formed by compressing an image obtained by dividing a base image at a predetermined reduction ratio, and a filter line in which a plurality of filter lines forming a pair with the latent image lines are arranged. Manufacturing apparatus comprising at least an input unit, a processing unit, and a storage unit, a forgery-preventing latent image display structure in which a base image in which the divided images are combined is displayed as a latent image by superimposing a group A method of manufacturing using
Inputting a filter image comprising a group of filter image lines in which a plurality of filter image lines prepared in advance are input to the input unit or generating the filter image in the processing unit;
Inputting the base image into the input unit or creating it with the processing unit;
Generating base image compression information having vector information as a compression direction when the base image is divided and compressed at a predetermined reduction ratio to produce the latent image line;
A step of compressing the base image by obtaining a reference position of a pixel constituting the latent image line using the base image compression information, a pixel position where the base image exists, and a preset compression coefficient;
Providing a color image information of the base image to the pixel at the reference position to generate the latent image line group, and a method for producing a forgery-preventing latent image image display structure. The step of generating the base image compression information includes:
Extracting a centerline for the filter stroke;
Determining the center position of each pixel for all pixels in the filter image;
10. The method according to claim 9, further comprising: associating the center position with a position on the center line where the center position is closest to the center line among all the pixels on the center line. A method for producing a latent image display structure for preventing counterfeiting. An anti-counterfeit latent image for causing an image producing apparatus including an input unit, a processing unit, a storage unit, and an output unit to execute the method for producing the anti-counterfeit latent image image display structure according to claim 9 or 10. Software for creating an image image display structure,
Inputting the base image by the input unit or creating the base image by the processing unit to generate base image data;
Inputting the filter image prepared in advance by the input unit or generating the filter image by the processing unit to generate filter image data;
Generating base image compression information data that holds, as vector information, a compression direction when the base image is divided and compressed at a predetermined reduction ratio by the processing unit;
The processing unit obtains a reference position of a pixel constituting the latent image line by using the base image compression information data, position data of a pixel in which the base image exists, and a preset compression coefficient. Compressing, and
Generating the latent image line group by adding color information of the base image to the pixels at the reference position by the processing unit;
Outputting the latent image line group by the output unit;
An anti-counterfeit latent image display structure producing software, which causes an image producing apparatus to execute a method for producing an anti-counterfeit latent image image display structure. The step of generating the base image compression information data includes:
Extracting a center line for the filter image line by the processing unit;
Obtaining a center position for all pixels in the filter image by the processing unit;
A step of associating the center position with the position on the center line where the center position is closest to the center line among all the pixels on the center line by the processing unit. The software for producing a latent image display structure for preventing counterfeiting according to claim 11.

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