JP2016155268A - Three-dimensional image expression structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional image expression structure which does not reduce resolution of an original image, and improves visibility, even when a kinetic effect of the three-dimensional image is increased, and a three-dimensional image expressed print using the structure.SOLUTION: The invention relates to a three-dimensional image expression structure in which a three-dimensional image formation streak group is formed by an information image formed of information streak having predetermined reduction, and a background image formed of background streak having predetermined reduction which has a mirror reverse relationship with the information streak, and the information image and background image relatively move, thereby improving clarity of the image, and a print which is formed by using the same structure.SELECTED DRAWING: Figure 1

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 changes the observation angle while overlaying a specific filter on the image. The present invention relates to a three-dimensional image expression structure in which the shape of a visually recognized image changes, and a shape change printed matter produced by applying the three-dimensional image expression structure.

  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. 26, an original image (19) encrypted in the scrambled image (17) is reproduced by superimposing a specific filter image (18) on the scrambled image (17). Technology. Note that in FIG. 26, the original image (19) shows “cherry blossoms”. Actually, only the scrambled image (17) is printed on the security printed material, and the discriminator confirms whether the original image (19) is reproduced by superimposing the filter image (18) as necessary. It is operated in the form of discriminating false. As an example of an actual security print using this technology, there is “Spain 1000 pesos banknotes (issued in 1992)”, and lenticulars with a specific number of lines (filter image (18)) The characters “BANCODEESPANA” are reproduced.

  As shown in FIG. 27, the scrambled image (17) includes a plurality of latent image lines (20 (1), 20 (2), 20 () in which a part of the original image is divided in the first direction (S1). 3) ... 20 (i) ... 20 (n-1), 20 (n)). As shown in FIG. 28, this scrambled image is applied to a frame (21) having a specific width (W2) to divide the original image (19), and the divided original image (19) is converted into an in-frame image ( 22), and compressed to a certain width (W1) with a specific reduction ratio, and each latent image line (20) can be evenly arranged with a specific pitch (P1). The simplest method for scrambled image of the original image (19) is to superimpose a lenticular or microlens array on the original image (19), and the image sampled at that time becomes a scrambled image. For reproduction, the same lenticular can be superimposed on the scrambled image. As described above, the scrambled image is a technology that encrypts a specific original image by dividing and compressing it.

  In addition, as one of the anti-counterfeiting techniques using this scrambled image, an original image that was invisible under diffuse reflected light is reproduced under specular reflected 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.

Japanese Patent No. 5200284

  However, this scrambled image and the technique described in Patent Document 1 change the viewing angle to move the visually recognized image in the arrangement direction of the latent image line (20) (first direction (S1)). As shown in FIG. 26, the visible image has a plurality of latent image lines (20). Therefore, when the dynamic effect of the three-dimensional image is increased, the resolution of the original image (19) is lowered and it is visually recognized as a blurred state. Therefore, a technique for improving the visibility without reducing the resolution of the original image (19) has been desired.

  The present invention aims to solve such a conventional problem, and lowers the resolution of the original image even when the dynamic effect of the stereoscopic image is increased as compared with the conventional scrambled image. A stereoscopic image expression structure with improved visibility and a stereoscopic image expression printed material using the structure are provided.

  The present invention relates to a first three-dimensional image line formed by compressing a first in-frame image divided based on a first original image in a first direction and with a predetermined reduction ratio. The information image linearly arranged at the first pitch and the second in-frame image divided based on the second original image are the same as or different from the first direction and a predetermined reduction ratio. A second stereoscopic expression image formed by compressing at a reduction ratio is provided with a background image arranged in a line at a first pitch, and either the first stereoscopic expression image line or the second stereoscopic expression image line The other is a stereoscopic expression image formed by mirror-inversion of the in-frame image, and the first stereoscopic expression image line forming the information image is at least one of the second stereoscopic expression image line forming the background image. 3D image formation in which the images overlap and the information image is divided into different colors in the background image A three-dimensional image forming structure for authenticating a security print including a line group and a filter line group in which transparent or semi-transparent filter lines are arranged in a line at a first pitch, and forming a three-dimensional image The stereoscopic image expression structure is characterized in that the information image and the background image can be visually recognized by moving in different directions by superimposing the image line group and the filter image line group to change the observation angle.

  The present invention is a three-dimensional expression structure characterized in that an information image and a background image are formed of different color materials.

  In addition, the present invention includes a stereoscopic image on at least a part of the substrate, and the stereoscopic image has a wrinkle-like image line having at least one of a light-dark flip-flop property and a color flip-flop property. The three-dimensional image forming image group is formed by stacking the three-dimensional image forming image group having a color different from the color of the first image-shaped image line group under the specular reflection light. The line group is composed of a background image having a color different from that of the base material, and an information image formed in the background image and divided by a color different from the background image. The information image is based on the first original image. A first three-dimensional expression image formed by compressing the divided first in-frame image in a first direction and at a predetermined reduction ratio is arranged in a line at a first pitch, and a background image The second segmented based on the second original image The second three-dimensional image line formed by compressing the in-frame image of the first frame in a first direction and at a contraction rate that is the same as or different from a predetermined contraction rate is arranged in a single line at a first pitch, Either one of the three-dimensional expression line or the second three-dimensional expression line is a three-dimensional expression line formed by mirror-inversion of the in-frame image, and the first three-dimensional expression line forming the information image is At least partly overlaps the second stereoscopic expression image line forming the background image, and is formed by overlapping at least part of the stereoscopic image formation image group on at least part of the saddle-shaped image line group, When the observation angle is continuously changed and observed, the information image and the background image move in different directions and can be visually recognized.

  The present invention is a three-dimensional image expression printed matter in which an information image and a background image are formed of color materials having different colors.

  The present invention relates to a group of three-dimensional image formation lines formed by an information image composed of an information image line having a predetermined reduction ratio and a background image composed of a background image line having a predetermined reduction ratio in mirror-inversion relation with the information image line. And the relative movement of the information image and the background image makes it possible to improve the clarity of the image.

The structure of the stereo image expression structure of this invention is shown. The structure of the stereo image expression structure of this invention is shown. An example of the stereoscopic image formation image line group in 1st embodiment is shown. The original image in 1st embodiment is shown. The information image in 1st embodiment is shown. The structure of the 1st three-dimensional expression image line which forms the information image of 1st embodiment is shown. An example of a procedure for producing a specific information image according to the first embodiment will be described. The example which mirror-inverted the information image line of 1st embodiment is shown. The background image in the stereo image expression structure of 1st embodiment is shown. The arrangement of the information image and the background image of the first embodiment is shown. The arrangement of the first three-dimensional expression line and the first three-dimensional expression line of the first embodiment is shown. The structure of the filter drawing line group of 1st embodiment is shown. The stereo image expression structure of 1st embodiment and its cross-sectional structure are shown. Schematic which shows the principle of 1st embodiment. The stereo image expression structure of 2nd embodiment and its cross-sectional structure are shown. The principle of 2nd embodiment is shown. The security printed matter in Example 1 is shown. 3 shows a three-dimensional image forming image line group of Example 1; The filter drawing line group of Example 1 is shown. The effect of Example 1 is shown. The three-dimensional image expression printed material of Example 2 is shown. The saddle-shaped image line group of Example 2 is shown. 3 shows a stereoscopic image formation image group of Example 2. The three-dimensional image expression structure of Example 2 is shown. The effect of Example 2 is shown. The prior art is shown. The structure of a prior art is shown. The manufacturing method of a prior art 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, the configuration of the stereoscopic image expression structure (1) will be described with reference to FIG. As shown in FIG. 1A, the stereoscopic image expression structure (1) includes a stereoscopic image forming image line group (2) and a filter image line group (3). The stereoscopic image forming image line group (2) A background image (8 ') paired with the image (6) or a background image (8') paired with the information image (6 ') indicated by a dotted line, and a background paired with the information image (6, 6') The image (8 ′, 8) has a reverse image relationship in the image line configuration. As shown in FIG. 1B, on the stereoscopic image forming image line group (2) composed of information images (6, 6 ') formed by dividing the background image (8', 8) by different colors. A filter line group (3) is formed.

  Next, the stereoscopic image forming image group (2) will be described with reference to FIG. As shown in FIG. 2, the information image (6) is formed by arranging a plurality of first stereoscopic expression lines (5) in a line, and a pair of background images (8 ′) is a second stereoscopic image. The second three-dimensional expression line (7 ′) obtained by mirror-reversing the expression line (7) is arranged in a line, and the information image (6) is the first image in the background image (8 ′). It is formed by the stereoscopic expression image line (5) and the second stereoscopic expression image line (7 ') mirror-inverted. In addition, the information image (6 ′) indicated by the dotted line is the same as the first three-dimensional expression image line (5 ′) obtained by mirror-inverting the first three-dimensional expression image line (5) constituting the information image (6). The background image (8) is formed by linearly arranging the second three-dimensional expression lines (7), and the information image (6 ′) is mirror-inverted in the background image (8). The first three-dimensional expression line (5 ′) and the second three-dimensional expression line (7) are formed. Therefore, the stereoscopic image formation image line group (2) has a combination of a background image (8 ′) and an information image (6) as a pair, or a combination of a background image (8) and an information image (6 ′) as a pair. , Any combination may be used.

  The background image (8 ′, 8) has a color different from that of the base material. The information image (6, 6 ') formed in the background image (8', 8) may have a color different from that of the background image (8 ', 8), and the information image (6, 6') is outlined. It may be formed as an image line (extracted) and the color of the base material itself may be used. This is because when the color of the background image (8 ′, 8) is the same color as the color of the information image (6, 6 ′) or the color of the base material itself, the image cannot be distinguished. The color materials used for the colors of the background image (8 ′, 8) and the information image (6, 6 ′) are not particularly limited as long as they are different from each other. Alternatively, toner can be used. There is no limitation on the printing method for forming the stereoscopic image forming image line group (2), and it is desirable to form by offset printing in view of productivity. The “color” in the present invention represents a color including the concept of hue, saturation and lightness.

  An example of the stereoscopic image forming image group (2) in the stereoscopic image expression structure (1) will be described with reference to FIG. FIG. 3A shows a stereoscopic image forming image line group (2). The stereoscopic image formation image line group (2) is an information image (6, 6 ') configured by arranging the first stereoscopic expression image lines (5, 5') shown in FIG. And a background image (8 ′, 8) configured by arranging the second three-dimensional expression lines (7 ′, 7) shown in FIG. The information image (6, 6 ′) is configured in the area of the background image (8 ′, 8). In the present embodiment, the original image (9) of the information image is “sakura” shown in FIG. 4 (a), and the original image (10) of the background image is “circle” shown in FIG. 4 (b). In this example, the information image (6, 6 ′) is formed in white for convenience of distinguishing the information image (6, 6 ′) from the background image (8 ′, 8).

  The information image (6) will be described with reference to FIG. The plurality of first three-dimensional expression lines (5) forming the information image (6) enlarged in FIG. 5 are n first three-dimensional expression lines (5-1, 5-2, 5-3,. .. 5-n) are arranged in a line. Specifically, from the first three-dimensional expression line (5-1) having the line width (W1), the first direction orthogonal to the line direction of the first three-dimensional expression line (5-1). There is a first three-dimensional expression image line (5-2) having an image line width (W1) at a position shifted from the first pitch (P1) in the (S1 direction in the figure). There is a first three-dimensional expression image line (5-3) having an image line width (W1) at a position shifted from the first pitch (P1) in the first direction (S1) from 5-2). The first three-dimensional expression line (5) having the line width (W1) is shifted to the first pitch (P1) in the first direction (S1) from the first three-dimensional expression line (5-n). -N). In the present invention, “arranged in a line” means a state in which a plurality of image lines are regularly arranged in a certain direction.

  FIG. 6 shows the configuration of the first three-dimensional expression lines (5-1, 5-2,..., 5-n) forming the information image (6). Among the plurality of first three-dimensional expression lines (5-1, 5-2,..., 5-n), the first three-dimensional expression line (5-1) located on the leftmost side of the drawing, drawings The first three-dimensional expression image line (5-13) located substantially at the center and the first three-dimensional expression image line (5-24) located on the right side of the drawing will be extracted and described. Although not shown, the first three-dimensional expression line (5-1) and the first three-dimensional expression line (5-13) are naturally inserted between the first three-dimensional expression line (5-1) and the first three-dimensional expression line (5-13). 2) to the first three-dimensional expression line (5-12) are arranged at a constant pitch (P1), and similarly, the first three-dimensional expression line (5-13) and the first three-dimensional expression line. Between the line (5-24), the first three-dimensional expression line (5-14) to the first three-dimensional expression line (5-23) are arranged at a constant pitch (P1). Become. The first three-dimensional expression line (5-1, 5-13, 5-24) is a specific frame (11-1, 11) with respect to the pattern of “sakura” which is the original image (9) of the information image. −13, 11-24) is applied to divide the original image (9) of the information image, and the divided original image (9) of the information image is divided into the first in-frame images (12-1, 12). -13, 12-24), and the first in-frame images (12-1, 12-13, 12-24) are formed by compressing them to the line width (W1).

  Note that the image line width (W1) in the present invention includes the image line part of the pattern of “sakura” which is the original image (9) of the information image, and the width including the blank part to which the image line part is not added. This is the width formed by compressing the first in-frame image.

  The height of the frame to be fitted to the original image (9) of the information image may be equal to or greater than the height of the original image (9) of the information image (6). The frame width (W2) shown in FIG. It must be less than or equal to the width of the original image (9) of the image (6). Accordingly, the first stereoscopic expression image line (5-1) located at the left end of the information image (6) includes only the image of the left end portion of the original image (9) of the information image (6), and the information image The first three-dimensional expression image line (5-13) located almost at the center of (6) includes only the image of the central portion of the original image (9) of the information image, and is located at the right end of the information image (6). The first three-dimensional expression line (5-24) located includes only the image of the right part of the original image (9) of the information image.

  An example of a procedure for producing a specific information image (6) will be described with reference to FIG.

  First, as STEP1, the position of the leftmost frame (11-1) indicated by the dotted line enclosing as a reference for all frame positions is determined. The position of the leftmost frame (11-1) serving as a reference is a position where the right side of the frame (11-1) slightly overlaps the left edge of the original image (9) of the information image. The “slightly overlapping position” here is a position where the frame (11-1) and the original image (9) of the information image overlap even a little, and excludes a position that does not overlap at all. It is a state. The original image (9) of the information image included in the frame (11-1) is set as the first in-frame image (12-1), and the first in-frame image (12-1) is set to the line width ( Compress to W1) to form and arrange the first three-dimensional expression image line (5-1).

  Next, as STEP2, the position of the frame (11-2) indicated by the dotted line is determined by shifting the position of the left end frame (11-1) indicated by the dotted line to the right by a certain pitch (P1). . The original image (9) of the information image (6) included in the frame (11-2) is used as the first in-frame image (12-2), and similarly compressed to the image line width (W1). A three-dimensional expression image line (5-2) is prepared and arranged on the right side at a fixed pitch (P1) away from the first three-dimensional expression image line (5-1).

  Next, as STEP3, the position of the frame (11-3) indicated by the dotted line is determined by shifting the position of the frame (11-2) indicated by the dotted line to the right by a fixed pitch (P1). . The original image (9) of the information image (6) included in the frame (11-3) is used as the first in-frame image (12-3), and similarly compressed to the image line width (W1). A three-dimensional expression line (5-3) is produced, and is arranged on the right side at a fixed pitch (P1) away from the first three-dimensional expression line (5-2).

  The above procedure is repeated until STEPn, and when the position where the original image (9) of the information image (6) is not included in the frame is reached, the production of the first three-dimensional expression image line (5) is completed. That is, the same procedure is repeated until the frame (11-n), and finally the first stereoscopic expression image line (5-n) is arranged to complete the information image (6). Commercially available image processing software may be used for producing the information image (6). In the above-described production procedure, the position of the reference frame is created with the left end of the original image (9) of the information image as the reference point. However, the present invention is not limited to this, and the center of the original image (9) of the information image is not limited to this. Alternatively, the right end may be used as a reference point.

  Thus, the first stereoscopic expression image line (5) refers to the first in-frame image (12) divided based on the original image (9) of the information image (6) in the horizontal direction and the vertical direction. Or, it is an image line having a different shape compressed at a predetermined reduction ratio in both directions.

  In the present invention, the “intra-frame image divided based on the original image” means that the center point of the original image (9) of the information image and the center point of the information image (6) are assumed to be superimposed. The original image (9) of the information image contained in the frame. Therefore, since the original image (9) of the information image (6) is not simply divided into a plurality of pieces, the first in-frame image (12-2) is adjacent as shown in FIG. A part of the intra-frame image (12-1) is included, and the first intra-frame image (12-3) includes a part of the adjacent first intra-frame image (12-2). Thus, a part of the original image (9) of the overlapping information image (6) exists in the adjacent first intra-frame images.

  The first in-frame image (12) is compressed in one direction such as a vertical direction, a horizontal direction, or an oblique direction, and in both the vertical direction and the horizontal direction (simple reduction). ) Compression is possible. The “predetermined reduction ratio” in the present invention is the same reduction ratio for all of the first three-dimensional expression lines (5) forming the information image (6, 6 ′) in the target region. That's what it means. Therefore, the reduction ratio may be different between the information image (6, 6 ′) and a background image (8 ′, 8) described later.

  The reduction ratio is preferably set to a value of 0.01 or more and 0.5 or less, and is set to a value of 0.01 or more and 0.1 or less in order to visually recognize the information image (6, 6 ′) more clearly. It is more preferable. If the reduction ratio exceeds 0.1, the information image (6, 6 ′) is blurred and unclear, and if it is less than 0.01, distortion may occur depending on the shape of the information image (6, 6 ′) to be used. This is because an unclear image is obtained.

  Next, the information image (6 ′) formed by the first stereoscopic expression image line (5 ′) obtained by mirror-inverting the first stereoscopic expression image line (5) will be described with reference to FIG. As shown in FIG. 8, the point that the original image (9) of the information image (6 ′) is divided by fitting specific frames (11-1, 11-13, 11-24) is the same as FIG. This is the same as described above. The frame (11-1, 11-13, 11-24) divided by fitting is mirror-inverted and the first inverted in-frame image (12-1 ', 12-13', 12-24 ') Is made. Note that mirror inversion means that when an object image, pattern, or the like is reflected in a mirror, the image appears in the opposite direction. Accordingly, the first intra-frame images (12-1, 12-13, 12-24) of FIG. 6 and the first inverted intra-frame images (12-1 ′, 12-13 ′, 12-24 ′ of FIG. 8). ) Is the same as the original shape obtained by dividing the original image (9) of the information image (6 ′), but has a reverse orientation.

  The first stereoscopic expression image line (5 ′) obtained by compressing the first inverted in-frame image (12-1 ′, 12-13 ′, 12-24 ′) has a fine image line width (W1). Therefore, it is difficult to determine whether or not the first stereoscopic expression image line (5 ′) arranged in plural is a mirror-inverted shape of the first three-dimensional expression image line (5 ′).

  When the information image (6 ′) formed by the mirror-inverted first three-dimensional image line (5 ′) is observed as the three-dimensional image expression structure (1) of the present invention, the information image (6 ′) is in the opposite direction. Will be shown.

  Next, the configuration of the background image (8 ′, 8) will be described with reference to FIG. The production method is the same as the production method of the information image (6), and will be omitted. As shown in FIG. 9A, the background image included in the frame (11-1) based on the original image (10) of the background image (8) having the “circle” shape shown in FIG. 4B. The original image (10) is used as the second intra-frame image (12a-1), the second intra-frame image (12a-1) is compressed to the image line width (W4), and the second three-dimensional expression image line is obtained. (7) is formed and arranged. Further, as shown in FIG. 9B, the frames (11-1, 11-13, 11-24) are mirror-inverted, and second in-frame images (12a-1 ′, 12a-13) are obtained. ', 12a-24'). The second inverted in-frame image (12a-1 ′, 12a-13 ′, 12a-24 ′) is compressed to the image line width (W4) to form the second stereoscopic expression image line (7). To do. In this way, a diagram consisting of the background image (8) shown in FIG. 9 (a), which consists of the second three-dimensional expression image line (7), and the mirror-inverted second three-dimensional expression image line (7 ′). A background image (8 ′) shown in FIG.

  In addition, the line width (W1) of the first three-dimensional expression line (5, 5 ') and the line width (W4) of the second three-dimensional expression line (7', 7) are the same, The pitch (P1) is the same. When at least a part of the first three-dimensional expression image line (5, 5 ′) does not overlap with the second three-dimensional expression image line (7 ′, 7), a dynamic effect does not occur.

  Next, the positional relationship between the information image (6, 6 ′) and the background image (8 ′, 8) will be described with reference to FIG. As shown in FIG. 10A, the information image (6, 6 ′) needs to be formed in the background image (8 ′, 8). In the present invention, the information image (6, 6 ′) is formed in the background image (8 ′, 8), and the information image (6, 6 ′) and the background image (8 ′, 8) move in the opposite directions. The information image (6, 6 ′) and the background image (8 ′, 8) are in a mirror-inverted relationship because the dynamic effect is relatively enhanced by being visually recognized. Specifically, as shown in FIG. 10B, for the information image (6) formed by the first three-dimensional expression line (5), the mirror-inverted second three-dimensional expression line (7 Information image (6 ′) formed by combining the background image (8 ′) formed by ′) and forming the first three-dimensional image line (5 ′) mirror-inverted as shown in FIG. Is configured by combining the background image (8) formed by the second stereoscopic expression image line (7).

  As shown in FIG. 11, since the information image (6, 6 ′) is formed in the background image (8 ′, 8), at least on the second three-dimensional expression line (7 ′) mirror-inverted. Part of the first three-dimensional expression line (5) needs to overlap. Alternatively, it is necessary that the first three-dimensional expression image (5 ′) that is mirror-inverted overlaps at least a part of the second three-dimensional expression image line (7). Therefore, preferably, as shown in the enlarged view of FIG. 11A, the first three-dimensional expression image line (5, 5 ′) and the background image (8 ′, 8) that form the information image (6, 6 ′). ) To form the second stereoscopic expression image line (7 ′, 7) having the same phase (I), it is possible to strongly recognize the movement of the images in the opposite directions.

  In addition, the first three-dimensional expression image line (5, 5 ') and the second three-dimensional expression image line (7', 7) are parallel to the first direction (S1) in either direction (right direction or not). Although the phase can be shifted in the left direction, it is necessary to exclude the shift in which the half phase (1 / 2I) of the pitch (P1) is shifted. As shown in FIG. 11 (b), in the case where the ½ pitch phase (1 / 2I) is shifted, the information image (6) and the background image (8) move in the same direction and are visually recognized. It is. The phase (I) in the description is based on the first three-dimensional expression image line (5, 5 ′).

  Next, in realizing the stereoscopic image expression structure (1) constituting the present invention, a pair with the stereoscopic image forming image line group (2) is paired, and the original images (9) and (10) are stereoscopically The filter drawing line group (3) required for dynamically changing and reproducing will be described.

  FIG. 12A is a plan view of the filter drawing line group (3), and FIG. 12B is a sectional view taken along line XX ′. As shown in FIG. 12A, the filter drawing line group (3) is paired with the first three-dimensional expression drawing line (5, 5 ') and the second three-dimensional expression drawing line (7', 7). The filter image line (3) which comprises is arranged in a line shape in the first direction (S1). Also, as shown in FIG. 12B, each filter image line (13) has a predetermined height. The image line height of the filter image line (13) is not particularly limited, and has the same shape as that of a publicly-known publicly known lenticular lens.

  FIG. 13 shows a security print (16) using the three-dimensional image expression structure (1) of the present invention. The first three-dimensional image line (5, 5 ') and the second three-dimensional image line (7', 7). ) And the filter drawing line (13) will be described. As shown in FIG. 13A, in the stereoscopic image expression structure (1), the filter image group (3) is superimposed on the stereoscopic image formation image group (2) formed on the base material (4). It consists of FIG. 13B shows an XX ′ cross section of the stereoscopic image expression structure (1). In the present invention, the first three-dimensional expression image line (5, 5 '), the second three-dimensional expression image line (7', 7) and the filter image line (13) form a pair. When the filter drawing line group (3) is superimposed on the drawing line (5, 5 ') and the second stereoscopic expression drawing line (7', 7), the first stereoscopic expression drawing line (5, 5 ' ) And the second three-dimensional expression image line (7 ′, 7), one filter image line (13) is arranged. Therefore, the stereoscopic image formation image group (2) in which the first stereoscopic expression image line (5, 5 ') and the second stereoscopic expression image line (7) and the filter image line (13) forming a pair are arranged. And the pitch (P1) of the filter drawing line group (3) are the same. In addition, the image line width (W3) of the filter image line (13) is the image line width (W1) of the first three-dimensional expression image line (5, 5 ') and the second three-dimensional expression image line (7). It may be the same as or different from the line width (W4) of ', 7).

  The three-dimensional image formation image line group (2) including the first three-dimensional expression image line (5, 5 ') and the second three-dimensional expression image line (7', 7) arranged in a line in the present invention. The pitch (P1) and the pitch (P1) of the filter drawing line group (3) are 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, and the printing quality is not stable. Even if it can be formed, in most cases, the visibility of the appearing stereoscopic image is extremely lowered, which is not preferable. On the other hand, when the pitch is formed with a pitch of 1.0 mm or more, the resolution of an image that can be reproduced as a three-dimensional image is extremely lowered, and thus it is not preferable.

  Note that the width (W1, W4, W3) of each image line is not particularly limited as long as it is smaller than the above-described pitch (P1).

  The filter image line group (13) only needs to be able to express a stereoscopic image. If the filter image line group (3) is at least a range that covers the stereoscopic image formation image line group (2), As shown in the first embodiment, not only the shape covering the entire stereoscopic image forming image group (2) but also the same shape as the stereoscopic image forming image group (2) may be used. As the filter image line group (3), a transparent or translucent lenticular, a microlens array, or the like can be used.

(effect)
The dynamic effect can be visually recognized by observing the stereoscopic image expression structure (1) of the present invention continuously at different angles. In particular, since the information image (6, 6 ′) and the background image (8 ′, 8) can be visually recognized by moving in different directions, an effect of relatively enhancing the amount of motion is achieved.

(principle)
The principle of effect expression will be described with reference to FIG. In the stereoscopic image expression structure (1), the filter image line group (3) is laminated on the stereoscopic image forming image line group (2). As shown in FIG. 14A, a dynamic effect is expressed by observing the stereoscopic image expression structure (1) at different angles. For example, FIG. 14B shows an image when the stereoscopic image expression structure (1) is observed at an observation angle (14-1) from directly above. The original image (9) of the information image (6, 6 ′) and the original image (10) of the background image (8 ′, 8) can be visually recognized by overlapping each other. The center line at this time is Y-Y ', and the change amount of the dynamic effect is expressed by the distance from Y-Y'.

  FIG. 14 (c) shows an image when the stereoscopic image expression structure (1) is observed at an observation angle (14-2) from the right side in FIG. 14 (a). The original image (9) of the information image (6, 6 ′) can be viewed by moving the distance J1 from YY ′ to the direction of S3. At the same time, the original image (10) of the background images (8 ′, 8) can be visually recognized by moving the distance H1 from YY ′ to the direction S2.

  In FIG. 14A, an image when the stereoscopic image expression structure (1) is observed from the left side at the observation angle (14-3) is shown in FIG. The original image (9) of the information image (6, 6 ′) can be viewed by moving the distance J1 from YY ′ in the direction of S2. At the same time, the original image (10) of the background images (8 ′, 8) can be visually recognized by moving the distance H1 from YY ′ to the direction of S3.

  In this way, by continuously changing the observation angle, the original image (9) of the information image (6, 6 ′) and the original image (10) of the background image (8 ′, 8) move in opposite directions and are visually recognized. The dynamic effect can be visually recognized strongly by relative movement.

(Second embodiment)
Subsequently, as a second embodiment, a stereoscopic image expression printed matter (23) produced by applying the above-described stereoscopic image expression structure (1) will be described. The contents similar to those of the first embodiment are omitted.

  This three-dimensional image expression structure means that the three-dimensional image formation image line group (2) corresponding to the original image (9, 10) is reproduced under regular reflection light, and the original image (9 is reproduced by changing the observation angle). 10) appear to move in different directions. Basically, it is a technology that integrates the three-dimensional image forming image line group (2) and the filter image line group (3) having the above-described three-dimensional image expression structure, and the same pattern as the filter image line group (3) is raised. A three-dimensional image forming image group (2) is formed on top of each other. Unlike the above-described stereoscopic image expression structure, 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.

  FIG. 15 shows a three-dimensional image expression printed material (23) of the present invention. FIG. 15A is a schematic view from the perspective, and FIG. 15B is a cross-sectional view taken along the line XX ′. As shown to Fig.15 (a), a three-dimensional image expression printed matter (23) is a three-dimensional image formation image line group (2-) on the filter image line group (3-1) formed on the base material (4-1). A stereoscopic image expression structure (1-1) in which 1) is laminated is provided. As long as the three-dimensional image expression structure (1-1) can be formed, the base material (4-1) is not particularly limited to a material such as paper, plastic, or metal.

  As shown in FIG. 15 (b), the layered structure of the stereoscopic image expression structure (1-1) has a saddle-shaped image line group (3) corresponding to the filter image line group (3) on the base material (4-1). -1) and the first three-dimensional expression line (5-1, 5'-1) and the second three-dimensional expression line (7'-1, 7) on the saddle-shaped line group (3-1). -1) has a structure in which the three-dimensional image formation image line group (2-1) overlaps. Further, as described above, the stereoscopic image forming image line group (2-1) and the saddle-shaped image line group (3-1) are integrated, and the observer needs to prepare a filter or the like separately. Therefore, the authenticity can be easily determined under visible light.

  The saddle-like image line group (3-1) is a plurality of the saddle-like image lines (13-1) corresponding to the above-described filter image line (13) arranged at a pitch (P1), and forms a swell in the printed image line. It is formed by a printing method that can. In order to ensure a certain level of visibility in the stereoscopic image that appears, the raised height of the saddle-shaped image line (13-1) needs to be 3 μm or more, so it is formed by screen printing, intaglio printing, and UV-IJP. However, it is possible to form such a height of the image line even in gravure printing, flexographic printing, letterpress printing, or the like. The upper limit of the height of the swell is not particularly limited, but is set to 1 mm or less in consideration of stability, wear resistance, distribution suitability, and the like when a large amount of the three-dimensional image printed matter (23A) is stacked.

  Further, the saddle-shaped image line (13-1) 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 (13-1) needs to have a characteristic that the color changes greatly when the light intensity or hue changes when light enters. The greater the change in color, the higher the visibility of the stereoscopic image that appears.

  As an example of a method for imparting light and dark flip-flop properties to the ridge-like image line (13-1) having a bulge as described above, a highly glossy ink resin is used, or a metal pigment is mixed in the ink. This can be easily realized. Examples of functional materials that can impart color flip-flop properties include pearl pigments, cholesteric liquid crystals, glass flake pigments, Han powder powders, and scale-like metal pigments.

  Subsequently, a group of three-dimensional image formation lines (2-1) including the first three-dimensional expression line (5-1, 5'-1) and the second three-dimensional expression line (7'-1, 7-1). ). Since the configuration is the same as that of the first embodiment, a description thereof will be omitted. A color difference needs to be generated between the saddle-shaped image line group (3-1), 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 (13-1).

  In addition, since the stereoscopic image forming image group (2-1) is formed so as to overlap the saddle-shaped image line group (3-1), the haze under the stereoscopic image forming image group (2-1) is formed. The light incident on the line-like line group (3-1) is blocked, and the color change of the hook-like line group (3-1) generated under specular reflection light is suppressed. Therefore, since a large difference occurs in the color at the time of regular reflection of the saddle-shaped image line group (3-1) depending on whether or not the 3D image formation image line group (2-1) overlaps, the 3D image expression structure (1- In order to further improve the visibility of 1), it is desirable that the stereoscopic image formation image group (2-1) has high light blocking properties.

  For this reason, when the stereoscopic image forming image line group (2-1) 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.

  Next, the effect of the stereo image expression printed matter (23) in the second embodiment will be described. Like the effect already described in the first embodiment, the stereo image expression structure (1-1 of the present invention) is described. ) Can be visually observed at different angles. In particular, since the information image (6-1, 6'-1) and the background image (8'-1, 8-1) can be viewed by moving in different directions, the effect of relatively enhancing the amount of movement is achieved.

  The principle of generating such an effect will be described with reference to FIG. 16. For example, when light is incident on the stereoscopic image expression structure (1-1) from the A side as shown in FIG. Of the surface of the ridge-like image line (13-1) having a bulge forming the ridge-like image line group (3-1), the light is strongly regularly reflected from the center of each image line to the A side. When the light is incident only on the surface of the image line and conversely from the direction of the B side of the stereoscopic image expression structure (1-1), the light is strongly regularly reflected on the surface of the bowl-shaped image line (13-1). Is only the surface of the image line corresponding to the B side direction from the image line center.

  As described above, when an image line having a swell like the bowl-shaped image line (13-1) reflects light, the light is focused on the surface of the image line that is normal to the incident light with respect to the incident light. Reflected, in other words, the region that strongly reflects the light on the surface of the image line that rises changes according to the angle of the incident light.

  Since the stereoscopic image forming image group (2-1) is formed on the surface of the saddle-shaped image line (13-1), when the corrugated image line (13-1) strongly reflects light, The three-dimensional image forming image line (2-1) and the saddle-shaped image line group (3-1) superimposed on the image line are changed to different colors and have been concealed until then. The group (2-1) is clearly visualized by the difference in color.

  In this case, the stereoscopic image formation image group (2-1) to be visualized is only a portion formed by being superimposed on a region where light is strongly reflected in the saddle-shaped image line (13-1). The portion formed by being overlapped with the other region remains concealed. For this reason, when light is incident, a region that strongly reflects light is formed only on part of the surface of the image line (13-1). Therefore, a region that strongly reflects this light. Only the three-dimensional image formation image line group (2-1) superimposed on is sampled and visualized. The sampling mechanism includes a case where a lenticular lens or the like composed of a filter image line (13) is overlapped as a filter image line group (3) on the stereoscopic image formation image line group (2) in the above-described stereoscopic image expression structure (1) Since they are the same, the result of sampling is reproduced in the same manner as the information image (6, 6 ′) and the background image (8 ′, 8).

  As shown in FIG. 16 (b), when the observer's viewpoint moves or the stereoscopic image expression printed material (23) is tilted, the angle at which light enters changes, so that the saddle-shaped image line (13 -1), the region that reflects light also moves, and the sampled region of the three-dimensional image formation line group (2-1) also moves, and the three-dimensional image formation line group (2) -1) and the image line groups constituting the background images (8'-1, 8-1) constituting the information image (6-1, 6'-1) and the background image (8'-1, 8-1) are in a mirror-inverted relationship with each other. Shows that the original image (9) of the appearing information image (6-1, 6′-1) and the original image (10) of the background image (8′-1, 8-1) are moving in the opposite directions. Looks like.

  In addition, when viewing the stereoscopic image expression structure (1-1) directly, the right eye and the left eye are slightly different in the angle at which the incident light is reflected by the stereoscopic image expression printed material (23) and enters the eye. Therefore, the surface of the image line that reflects the light of the bowl-shaped image line (13-1) is also slightly different. Therefore, when the appearing information image (6-1, 6′-1) and the background image (8′-1, 8-1) are viewed from the right eye and from the left eye, the horizontal direction Are different in phase, resulting in a stereoscopic visual effect due to binocular parallax.

  For example, when the information image (6-1) is viewed from the left eye rather than from the right eye, and the information image (6-1) is on the right, the information image (6-1) is the three-dimensional image expression printed material (23). It seems to be in front of the surface. Conversely, when the information image (6-1) is viewed from the left eye rather than from the right eye, and the information image (6-1) is on the left, the information image (6-1) is the three-dimensional image expression printed material (23). It feels like it is deeper than the surface.

  Therefore, when the background image (8′-1) is formed using the second stereoscopic expression image line (7 ′) obtained by mirror-inverting the second stereoscopic expression image line (7), the background image (8 ′ -1) not only changes the direction of movement in the reverse direction, but also reverses the sense of perspective. When the second stereoscopic expression image line (7) is mirror-inverted, the appearing background image (8′-1) is felt to be present in front of the stereoscopic image expression printed matter (23). When the stereoscopic expression image line (7) is mirror-inverted, the appearing background image (8′-1) is felt to be present behind the stereoscopic image expression printed matter (23).

  In order to produce such a visual effect, the information image (6-1, 6'-1) and the background image (8'-1, 8-1) appear to change in the horizontal direction when viewed from the observer. Since the effect is essential, it is better to arrange the saddle-shaped image line (13-1) at an angle close to the vertical direction (more specifically, a direction orthogonal to the direction connecting the left and right eyes of the observer) This effect is high.

  The above is the original image (9) of the information image (6-1, 6′-1) that appears when the stereoscopic image expression printed material (23) strongly reflects light in the stereoscopic image expression printed material (23). This is the principle that the original image (10) of the background image (8′-1, 8-1) appears to move in the opposite direction.

Example 1
FIG. 17 shows a security print (16A) using the three-dimensional image expression structure (1A) of the present invention. As shown to Fig.17 (a), other printed patterns (15), such as a charge and a logo mark, are printed on the security printed matter (16A) besides the three-dimensional image expression structure (1A). As the base material (4A), general white coated paper (manufactured by Nippon Paper Industries Co., Ltd.) was used.

  FIG. 17B shows an outline of the configuration of the stereoscopic image expression structure (1A). The stereoscopic image expression structure (1A) forms a stereoscopic image forming image line group (2A) on the base material (4A), and further superimposes a filter image line group (3A) on the stereoscopic image forming image line group (2A). The structure. Further, the original image (9) of the information image (6A) is “sakura” based on the original images (9, 10) shown in FIG. The original image (10) of the background image (8′A) was “circle”.

  The stereoscopic image forming image line group (2A) was printed on the substrate (4A) by dry offset printing. As the printing plate, a dry offset printing plate was used, and the white three-dimensional image line (5A) forming the information image (6A) was a white drawing line. Black UV ink (manufactured by T & K TOKA Co., Ltd.) was used for the second three-dimensional image line (7′A) forming the background image (8′A).

  Next, the stereoscopic image forming image group (2A) will be described with reference to FIG. As shown in FIG. 18 (a), the information image (6A) includes the first three-dimensional expression image line (5A) having an image line width (W1) of 0.4 mm and the first image with a pitch (P1) of 0.6 mm. They were arranged in a line in the direction. As shown in FIG. 18 (b), the background image (8′A) has a second stereo expression image line (7′A) obtained by mirror inversion of the image line width (W4) 0.4 mm, and the pitch (P1). It was formed in a line array in the first direction by 0.6 mm. As shown in FIG. 18C, the first three-dimensional expression line (5A) is formed so as to overlap the second three-dimensional expression line (7′A) without shifting the phase (I). did.

  As shown in FIG. 19, the filter image line group (3A) used a lenticular lens in which filter image lines (13A) having an image line width (W3) of 0.4 mm and a pitch (P1) of 0.6 mm are arranged.

(effect)
The effect will be described with reference to FIG. As shown in FIG. 20 (a), the dynamic effect was expressed by observing the stereoscopic image expression structure (1A) at different angles. For example, FIG. 20B shows an image when the stereoscopic image expression structure (1A) is observed at an observation angle (14-1) from directly above. The original image (9) of the information image (6A) and the original image (10) of the background image (8′A) were visible at the center of each other. The center line at this time is Y-Y ', and the change amount of the dynamic effect is represented by the distance from Y-Y'.

  In FIG. 20A, an image when the stereoscopic image expression structure (1A) is observed at an observation angle (14-2) from the right side is shown in FIG. The original image (9) of the information image (6A) was visually recognized by moving the distance J1 from YY ′ to S3. At the same time, the original image (10) of the background image (8′A) was visible by moving the distance H1 from Y-Y ′ in the direction of S2.

  In FIG. 20A, an image when the stereoscopic image expression structure (1A) is observed from the left side at the observation angle (14-3) is shown in FIG. The original image (9) of the information image (6A) was visible by moving the distance J1 from YY ′ to the direction S2. At the same time, the original image (10) of the background image (8′A) was visually recognized by moving the distance H1 from YY ′ to S3.

  In this way, by continuously changing the observation angle, the original image (9) of the information image (6A) and the original image (10) of the background image (8′A) can be visually recognized by moving in the opposite directions. The dynamic effect was able to be visually recognized with a strong movement.

(Example 2)
FIG. 21 shows a three-dimensional image expression printed material (23A) in the present invention. As shown to Fig.21 (a), other printing patterns (15A-1), such as a charge and a logo mark, are printed on a stereo image expression printed matter (23A) besides a stereo image expression structure (1A-1). ing. As the substrate (4A-1), general white coated paper (manufactured by Nippon Paper Industries Co., Ltd.) was used.

  FIG. 21B shows an outline of the configuration of the stereoscopic image expression structure (1A-1). The stereoscopic image expression structure (1A-1) forms a cage-like image line group (3A-1) on the substrate (4A-1), and further forms a stereo image on the cage-like image line group (3A-1). It was set as the structure which overlaps an image line group (2A-1). Moreover, the original image (9) of the information image (6A-1) is “sakura” based on the original images (9, 10) shown in FIG. The original image (10) of the background image (8′A-1) was “circle”.

  As shown in FIG. 22 (a), the saddle-like image line group (3A-1) has a saddle-like image line (13A-1) having an image line width (W3) of 0.4 mm and a pitch (P1) of 0.6 mm. It arranged in the 1st direction (S1) direction in the shape of a line, and printed on the base material (4A-1) 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 appears black under diffuse reflected light, which is the color of a colored pigment, but changes to gold which is an interference color of an iris pearl pigment under regular reflected light. It is an ink provided. In addition, as shown in FIG.22 (b), the raised height (h) on the base material (4A-1) was about 10 micrometers.

  Next, the stereoscopic image forming image line group (2A-1) will be described with reference to FIG. As shown in FIG. 23 (a), the information image (6A-1) includes a first three-dimensional expression image (5A-1) having an image line width (W1) of 0.4 mm and a pitch (P1) of 0.6 mm. Were arranged in a line in the first direction (S1). As shown in FIG. 23 (b), the background image (8′A-1) is a mirror-inverted second three-dimensional image line (7′A-1) having a line width (W4) of 0.4 mm. The pitch (P1) was 0.6 mm and was arranged in a line in the first direction (S1). As shown in FIG. 23C, the first three-dimensional expression image line (5A-1) overlaps the second three-dimensional expression image line (7'A-1) without shifting the phase (I). Formed as follows.

  As shown in FIG. 24A, the stereoscopic image forming image group (2A-1) having the above-described configuration is subjected to dry offset printing on the saddle-shaped image line group (3A-1) using a dry offset printing plate. The three-dimensional image expression structure (1A-1) was produced by printing. In addition, the first three-dimensional expression image line (5A-1) forming the information image (6A-1) is constituted by a white image line using a transparent UV mat ink (manufactured by T & K TOKA Co., Ltd.). The second stereoscopic expression image line (7′A-1) forming the image (8′A-1) is composed of a black image line, and as shown in FIG. It was set as the structure which overlaps on the bowl-shaped image line (13A-1) which forms (3A-1).

(effect)
The effect will be described with reference to FIG. As shown in FIG. 25A, a dynamic effect is expressed by observing the stereoscopic image expression structure (1A-1) at different angles. For example, FIG. 25B shows an image when the stereoscopic image expression structure (1A-1) is observed at an observation angle (14-1) from directly above. The original image (9) of the information image (6A-1) and the original image (10) of the background image (8′A-1) were visually recognized by overlapping each other. The center line at this time is Y-Y ', and the change amount of the dynamic effect is represented by the distance from Y-Y'.

  FIG. 25 (c) shows an image when the stereoscopic image expression structure (1A-1) is observed at the observation angle (14-2) from the right side in FIG. 25 (a). The original image (9) of the information image (6A-1) was visible by moving the distance J1 from YY ′ in the direction of S3. At the same time, the original image (10) of the background image (8′A-1) was visible by moving the distance H1 from YY ′ to the direction S2.

  In FIG. 25A, an image when the stereoscopic image expression structure (1A-1) is observed from the left side at the observation angle (14-3) is shown in FIG. The original image (9) of the information image (6A-1) was visible by moving the distance J1 from YY ′ in the direction of S2. At the same time, the original image (10) of the background image (8′A-1) was visible by moving the distance H1 from YY ′ to S3.

  In this way, by continuously changing the observation angle, the original image (9) of the information image (6A-1) and the original image (10) of the background image (8′A-1) move in the opposite directions and are visually recognized. It was possible to see the dynamic effect strongly by relative movement.

1, 1-1, 1A, 1A-1 3D image expression structure 2, 2-1, 2A, 2A-1 3D image forming image group 3, 3-1, 3A, 3A-1 Filter image group, bowl-shaped Image line group 4, 4-1, 4A, 4A-1 Base material 5, 5-1, 5A, 5A-1 First three-dimensional expression image line 5 ', 5'-1, 5'A, 5'A- 1 Mirror-reversed first three-dimensional image lines 6, 6-1, 6A, 6A-1, 6 ', 6'-1, 6'A, 6'A-1 Information images 7, 7-1, 7A, 7A-1 Second stereoscopic expression line 7 ', 7'-1, 7'A, 7'A-1 Second stereoscopic expression line 8, 8-1, 8A, 8A-1, 8 mirror-inverted ', 8'-1, 8'A, 8'A-1 Background image 9 Information image original image 10 Background image original image 11 Frame 12, 12' In-frame images 13, 13-1, 13A, 13A-1 Filter stroke, hook stroke 14 -1 Observation angle from right above 14-2 Observation angle from right side 14-3 Observation angle from left side 15, 15A-1 Print pattern 16, 16A Security print 17 Scrambled image 18 Filter image 19 Original image 20 Latent image line 21 Frame 22 In-frame image 23, 23A Three-dimensional image expression printed matter

Claims (4)

The first three-dimensional image line formed by compressing the first in-frame image divided based on the first original image in the first direction and with a predetermined reduction ratio is formed into a single line. An information image arranged at one pitch and a second in-frame image divided based on the second original image are reduced in the first direction and the same or different from the predetermined reduction rate. Comprising the background image arranged at the first pitch in the form of a second solid expression line formed by compression with
Either one of the first three-dimensional expression line and the second three-dimensional expression line is a three-dimensional expression line formed by mirror-inverting the in-frame image,
The first three-dimensional expression line that forms the information image is at least partially overlapped with the second three-dimensional expression line that forms the background image, and the information image is different from the background image. Authenticating a security printed matter including a stereoscopic image forming image line group arranged by color and a filter line group in which transparent or semi-transparent filter image lines are arranged at the first pitch in a line shape. A stereoscopic image expression structure for
A three-dimensional image expression structure characterized in that the information image and the background image can be visually recognized by moving in different directions by superimposing the three-dimensional image formation image group and the filter image line group to change an observation angle.   The three-dimensional expression structure according to claim 1, wherein the information image and the background image are formed of different color materials. At least a part of the base material is provided with a stereoscopic image,
The three-dimensional image includes a group of rod-shaped image lines having at least one of light-dark flip-flop characteristics and color flip-flop characteristics, and a regular reflection light. Below, a three-dimensional image forming image line group having a color different from the color of the saddle-shaped image line group is laminated,
The three-dimensional image formation line group is composed of a background image having a color different from that of the base material, and an information image formed in the background image and divided by a color different from the background image,
The information image is a first three-dimensional expression image line formed by compressing a first in-frame image divided based on a first original image in a first direction and a predetermined reduction ratio. Arranged in the form of a line with the first pitch,
The background image is formed by compressing the second in-frame image divided based on the second original image at the same or different reduction ratio as the first direction and the predetermined reduction ratio. The second three-dimensional expression line is arranged in a line shape by the first pitch,
Either one of the first three-dimensional expression line and the second three-dimensional expression line is a three-dimensional expression line formed by mirror-inverting the in-frame image,
The first stereoscopic expression image line forming the information image is at least partially overlapped with the second stereoscopic expression image line forming the background image,
At least a part of the three-dimensional image-forming image line group is formed on at least a part of the saddle-shaped image line group,
When the substrate is observed while continuously changing the observation angle, the information image and the background image can be visually recognized by moving in different directions.   The three-dimensional image expression printed material according to claim 3, wherein the information image and the background image are formed of different color materials.

Images