KR20170029791A - Identification pattern and printed matter having that, and producing method thereof - Google Patents

Abstract

The present invention relates to an identification pattern, and more particularly to an identification pattern that is clearly identified only under a limited condition. The identification pattern is a pattern representing a visual image as a set of halftone dots, where a part of the image has a halftone dot line per inch (LPI) different from the halftone dot LPI of a background image to form a hidden image. The difference in LPI does not exceed 20 LPI, so that the LPI difference of the halftone dot is not visible. As described above, since the identification pattern of the present invention can be easily implemented without expensive equipment or special equipment, it can be easily implemented at a low cost with a small amount of printed matter, and also can be adopted to the digitized image itself, so that the identification can be applied to electronic display means.

Description

[0002] Identification patterns and printed matter having,

The present invention relates to a pattern, and more particularly, to a pattern, a printed matter having the pattern, and a method of manufacturing the same, characterized in that the pattern is clearly identified only under limited conditions.

A visually perceived image is the result of visible light being recognized through the human retina through a combination of spectrums of specific wavelengths. Such an image can be realized by the electronic light emitting means itself, or can be recognized by the reflection of visible light from outside by applying a component having color to an object such as paper.

On the other hand, these images are provided in various forms, and in recent years, it is required to meet the purpose of having a special function beyond the aim of simple visual aesthetics. The background of the present invention may be exemplified by the use of the image as an indication of whether or not the source of the image is genuine. More specifically, the image may be provided with special recognition means to prove whether the object is genuine .

A typical example of this is a method of recognizing that a printed image containing an image is a special image easily by adding a hologram using a special laser apparatus (Korean Patent Laid-Open No. 10-2008-0040968 'Security paper with forgery prevention function And a production method thereof). However, such a hologram method has a disadvantage of requiring expensive laser equipment, which is not suitable for a small amount of printed matter.

In order to overcome such disadvantages, techniques for achieving the object by using the latest digital technology have recently been proposed. For example, a technique of adding an authentication mark that encrypts the print contents to identify authenticity by a separate recognition device (Korean Patent Registration No. 10-1339306 " Security Document ") has been proposed. However, this digital technology has a disadvantage in that it is necessary to have a separate recognizing device so that the authenticity of the printed matter can be grasped.

Particularly, in all of the above-described known technologies, recognition means for judging authenticity of a printed matter is directly exposed to the outside, which rather imitates the hologram itself or imitates an authentication mark to the printed matter, ', But rather the purpose of judging authenticity is abused.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-

And it is an object of the present invention to provide a test pattern that can be easily confirmed whether or not it is authentic even without expensive equipment or special equipment.

It is another object of the present invention to provide a recognition pattern that allows a user to easily recognize presence or absence of a recognition pattern by a simple method because the user is not easily exposed to the outside.

It is another object of the present invention to provide a printed matter having the above-mentioned pattern of recognition and a method for producing the same.

In order to solve the above problem, the present invention provides a pattern for representing a visual image as a set of halftone dots, wherein a part of the image is a halftone dots (DPI) To form a hidden image, but the difference of the athletes does not exceed 20 LPI, so that the difference of the skaters in the halftone dot is not revealed visually.

The printed matter having the identification pattern of the present invention further comprises a convex coating layer having a forehead (LPI) having the same resolution as that of the dotted line borders (LPI) of the image on the printed matter on which the above-mentioned identification pattern is expressed.

The present invention also provides a method of producing a printed matter having a visual pattern as a set of halftone dots, the method comprising the steps of: Converting a portion of the halftone dot image into a halftone dot image different from the original halftone dot image to form a hidden image, and printing a halftone dot image on which the hidden image is formed to obtain a printed image.

According to the present invention, the following effects can be obtained.

Since the present invention can be easily implemented without using expensive equipment or special equipment, it can be easily implemented at a low cost even in a small amount of printed matter, and also can be adopted to a digitalized image itself. Lt; / RTI >

Next, although the present invention is not easily exposed to the outside, it can be easily recognized by a simple method. Therefore, there is an effect of solving the problem that the consumer is rather mistaken due to active imitation.

Figure 1: An example of an image that is visually represented as a collection of halftone dots
Figure 2: An enlarged view of Figure 1
Figure 3: Example of setting a partial image of the original image as a hidden image
Figure 4: Example of detached hidden image from original image
Figure 5: Example of changing the halftone angle of the separated hidden image
Fig. 6: Example of combining hidden images with changed halftone angles in the original image
7: An enlarged view of part of the image of Fig. 6
Figure 9: Example of adding hidden image with changed dyed image to original image
10: Example of enlarging a part of the image of Fig. 9
11: Example in which a transparent film for verification is placed on the identification pattern of the present invention
12: Example of raising the transparent film for verification at different angles to the pattern of the present invention
Fig. 13: Example of forming a coating layer on the printed matter in which the identification pattern of the present invention is expressed
14: Actual example of a printed matter on which the coating layer of Fig. 13 is formed
Fig. 15: Method for producing printed matter having a test pattern according to the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, FIGS. 1 to 15.

However, the scope of the present invention is not limited to the embodiments described below, and various modifications may be made by those skilled in the art without departing from the technical scope of the present invention.

First, a method of representing an image in the present invention will be described with reference to FIG. 1 and FIG.

However, in the present invention, a pattern method of representing an image by a set of a plurality of halftone dots is utilized. This is because the structure of the whole image is formed by a set of fine points having different shades It is a way to feel.

In particular, in printing, the image is divided into a plurality of halftone dots having different sizes to produce a printing plate, and a desired image is visually obtained by implementing the desired dullness through a method in which ink is applied to the halftone dots.

In this case, the color image is divided into four primary colors of Y (Yellow), M (Magenta), C (Cyan), and K (Black) K and a color image of a natural color as shown in FIG. 1 is obtained by cumulatively printing each of these colors on a single sheet of paper. As shown in FIG. 2, , And the small rose pattern is called Rossete (Rosset).

The reason why the rosette pattern is generated is to distribute the lines of the Y, M, C, and K halves at a certain angle in order to suppress the moire phenomenon as much as possible, It is caused by placing it apart and turning it.

At this time, M, C, and K are given angles so that they are separated by 30 degrees from each other, and Y is given an angle so as to have an intermediate value of any two colors. In the example, dot angles are given as shown in Table 1 below.

color

Y
M
C
K
Dot angle

7.5
52.5
22.5
85.5

As described above, in the case of expressing a visual image as a set of halftone dots, the detection pattern according to the present invention has a halftone angle different from the halftone angle of the background image to form a hidden image .

Referring to FIGS. 3 to 7,

First, as shown in FIG. 3, an original image decomposed into Y, M, C, and K is prepared so as to have the above-mentioned halftone angles, and a part of the original image is separated to set a hidden image area.

At this time, the remaining original image of FIG. 4 becomes a background image, and has a dotted angle of Y = 7.5, M = 52.5, C = 22.5, K = 85.5. The separated area of FIG. 5 becomes a hidden image, and the halftone angle is different from the original halftone angle of the background image. For example, a halftone angle of Y = 82.5, M = 22.5, C = 52.5, .

If the background image and the hidden image have different dot angles and the images are added again, the entire image is completed again as shown in FIG. 6, and the dot angles of the respective colors constituting the background image and the hidden image are 2, as shown in Fig.

color

Y
M
C
K
Background image
Dot angle
7.5
52.5
22.5
85.5
Hidden image
Dot angle
82.5
22.5
52.5
7.5

As a representative example, referring to FIG. 7 in which only the halftone of the C color is separated and enlarged, it can be seen that the halftone angle of the background image is 22.5 degrees while the halftone angle of the hidden image inside the dotted line is 52.5 degrees.

In the preferred embodiment of the present invention, as shown in Table 2, the halftone angles of the respective colors constituting the hidden image are different from the halftone angles of the original colors in the background image, It is possible to match.

The halftone angle between each color of the background image is kept at an interval of 30 degrees except Y, and Y is located at an intermediate position between arbitrary colors, thereby minimizing interference between colors. Thus, the halftone angle of each color constituting the hidden image is , It is possible to minimize the interference between colors and minimize the moiré phenomenon, and the effect of being placed on the extended line of the dotted angle of the separated color of the background image is generated, so that the visual So that it is possible to prevent the user from easily recognizing the hidden image.

In particular, as shown in Table 2, when the halftone angles of M and C which are in mutually complementary positions are changed and matched and the halftone angles of Y and K are matched with each other, the background image and the hidden image are visually identified It is possible to prevent the phenomenon that is caused by the vibration.

However, according to another embodiment of the present invention, not only the halftone dot angles are matched as described above, but the halftone dot angles are dispersed among various colors by locating the halftone dot angle of the hidden image at the halftone dot angle of the background image, It is sufficiently possible to minimize what is identified as < RTI ID = 0.0 >

Referring again to FIG. 7, in which only the halftone of the C color is separated and enlarged, in the process of separating the hidden image area and changing the halftone angle, the specific halftone dot at the image boundary is separated and split. When the halftone dot is split, the position of the halftone dot is changed to another position in the process of changing the halftone dot angle, resulting in nonuniformity in the image boundary between the background image and the hidden image.

This non-uniformity can be noticeable to the user when the entire image is viewed at a particular boundary.

To this end, in the present invention, when the halftone dot splitting at the image boundary is less than a certain percentage, the non-uniformity is minimized by deleting the halftone dot. For example, in FIG. 8, when the halftone dot at the image boundary is less than 50% of the original size, it is deleted, thereby minimizing the non-uniformity at the image boundary and preventing the user from paying attention to the image boundary. It goes without saying that this can also be applied to the case of varying the density of the halftone dots described later.

In the present invention, it is also possible to form the pattern of the halftone dots by expressing the entire image by differentiating the density of the halftone dot from the background image and the hidden image.

To represent an image with a set of halftone dots, the resolution is set by adjusting the number of halftone dots according to the halftone dot angle. In the case of printing, the unit of the halftone dots per line (LPI = Line per inch) is applied. Accordingly, the present invention forms a hidden image by differently applying a background image and a hidden image of a hidden image.

Referring to FIGS. 9 to 10,

First, as shown in FIG. 3, an original image decomposed into Y, M, C, and K is prepared, and a background image area is set as shown in FIG. 4 by separating the hidden image area.

Then, the LPI of the separated hidden image area is set differently from the background image. For example, if the dot image of the hidden image is lowered and added together, the entire image is completed again as shown in FIG.

FIG. 10 shows a change in a dotted dot pattern by enlarging an area where a background image and a hidden image are included in the entire recognition pattern, and the dot size of the hidden image is increased in comparison with the background image, The results are shown in Fig.

At this time, it is preferable that the halftone dot of the hidden image has a range of -20 LPI to +20 LPI from the halftone dot of the background image. If the difference of the dots is more than 20 LPI, because the difference of the athlete is visually observed when the visual pattern is observed with the naked eye, it contradicts the incidental effect of the present invention so as not to be easily exposed to the outside.

Furthermore, it is preferable that the resolution of the image applied to the present invention has a high resolution of at least 195 LPI. As described above, even if the dot image of the hidden image is adjusted to -20 LPI in the original image, This is because the difference in the dot angle between the background image and the hidden image is not visible to the naked eye only when the resolution is higher than 175 LPI.

The identification pattern of the present invention as described above enables the user to confirm authenticity in the following manner.

First, how to enlarge.

The user can observe the background image and the hidden image angle of the hidden image and the dots of the hidden image by observing the dots that make up the image in detail by visually checking the details with the naked eye or by using a magnifying glass.

Or through the display means, the change of the halftone dot can be easily observed through the enlargement of the screen, thereby confirming the authenticity of the test pattern.

Second, how to identify moire patterns.

The moire fringe refers to a unique pattern generated when the distribution of dotted lines distributed on a line at a periodic density overlaps with a set of other lines distributed at the same density. In the present invention, the moire fringe , A halftone dot having 1/3 times, 1/2 times, 2 times, or 3 times the halftone dot corresponding to a multiple of the halftone dots of the detection pattern is placed, the moire patterns generated in the background image and the hidden image are As a result, the authenticity of the pattern can be easily confirmed.

For example, referring to FIGS. 11 and 12, when a transparent film patterned with the same density as the pattern is matched to the background image of the printed matter, a moiré pattern appears in the hidden image (FIG. 11) The moire pattern is displayed in the background image (FIG. 12). As a result, the user can easily confirm the authenticity from the pattern.

On the other hand, the identification pattern according to the present invention can be used in such a manner that it is expressed in a printed material such as paper or synthetic paper and attached to an actual product or used as a printed material itself.

However, if a printed convex coating layer is formed on the printed matter in such a printed matter, there is an additional effect that the moire pattern can be easily confirmed without additional auxiliary equipment.

Referring to FIG. 13, a transparent coating layer is formed on top of a printed matter on which a test pattern is expressed, and a periodic convex pattern is formed on the coating layer. The period of the convex layer formed at this time corresponds to the period of the pattern .

At this time, the convex type coating layer can be obtained by forming a transparent coating layer on the upper side of the printed material and forming fine scratching on the surface thereof, or it is possible to obtain the convex type coating layer by a method in which fine convex forming is formed at a specific period on the laminating film, have.

When such a convex-shaped coating layer is formed on the printed matter having the identification pattern, interference between the direction in which the convex pattern of the coating layer is formed and the background image of the detection pattern, or the direction in which the convex pattern of the coating layer is formed, The background image and the hidden image are easily distinguished by the naked eye without a separate recognition means. At this time, the convex type coating layer acts as a convex lens, and the moire pattern according to the viewing direction So that a stereoscopic image such as a hologram can be provided, so that the identification pattern according to the present invention can be used more easily and effectively for identification of authenticity.

Next, a method for manufacturing a printed matter having a pattern of the present invention according to the present invention will be described with reference to FIG.

The identification pattern according to the present invention is implemented on a printed matter that represents a visual image as a set of halftone dots. First, the original image is converted into a halftone dot image expressed as a halftone dot having a predetermined halftone angle.

In this case, when the original image is a color image, the color image is divided into multicolor primary colors (S100: color separation step), and then decomposed into halftone dots by each color (S200: halftone decomposition step).

For example, in the case of a printed material embodied with ink on a printing paper by a printing method, an original image is separated into colors of Y, M, C and K, and an image obtained by dividing the halftone dots by each color is obtained. A printing plate is produced.

At this time, the image subjected to the halftone decomposition is subjected to the step of changing the halftone dot property (S300). After extracting the area corresponding to the hidden image from the decomposed image for each color, the angle of the halftone dot is changed, And then applied to the original image again to obtain the converted halftone dot image.

Then, by sequentially printing the converted halftone dot images on an object by color, it is possible to obtain a printed matter to which the detection pattern according to the present invention is applied (S400: printing step).

Meanwhile, the method of manufacturing a printed matter having the identification pattern according to the present invention may be implemented by an output means such as a printer, for example.

In the case of a laser printer, an output means such as a printer is subjected to a process of obtaining printed matter by fixing ink to a printing paper wound around the drum by ejecting ink in a specific direction from the toner head.

In order to achieve the above object, the present invention provides a method of producing a printed matter having a detection pattern, comprising the steps of: converting a halftone dot image which is recognized by the output means and capable of adjusting the ink ejection amount for each color, It is the same as the printing method. However, the obtained halftone dot image is not produced as a printing plate but is provided to a computer output means to print by color, thereby realizing the present invention.

As an easy example, the converted halftone dot image includes a background image and a hidden image area. The halftone angle of the hues forming the background image is different from that of the hues forming the hidden image, The background image is output by the toner head so that the background image is outputted by the basic halftone dot angle and the hidden image is output in the second direction different from the first halftone dot angle so as to have a different halftone angle It is possible to implement the present invention.

As another example, the converted halftone dot image includes an image area in which the background is already present, and the density of the halftone dots of the background image and the hidden image is within a range of maximum 20 LPI, Implementation of the invention is possible.

In particular, in the process of printing the identification pattern according to the present invention by the output means as described above, the computing means and the output means may be remotely located and connected by a network. In this case, There is an advantage that the printed matter having the identification pattern according to the present invention can be easily manufactured by the output means.

Meanwhile, it is apparent that the above-described pattern, the printed matter having the same, and the method of manufacturing the same according to the present invention are not limited to the above-described examples and can be easily implemented by those skilled in the art in a variety of ways.

S100: Color separation step
S200: halftone decomposition step
S300: Step of changing the hue property
S400: Printing step

Claims (18)

For a pattern that represents a visual image as a set of halftone dots,
A portion of the image has a dot dot player (LPI) different from that of the background image to form a hidden image,
The difference of the athletes does not exceed 20 LPI, so that the difference of the athlete's skate is not visually recognized.
The method according to claim 1,
And the LPI of the halftone dot has a high resolution of at least 195 LPI or more so that the difference of the halftone dot players is not visually evident.
The method of claim 2,
Wherein the halftone angle of the background image and the halftone angle of the hidden image are different from each other.
The method of claim 3,
Wherein the image comprises a combination of multicolor primary colors having mutually different dot angles,
Wherein the multi-color dot angle of the hidden image is different from the dot angle of the original color of the background image, and matches the dot angle of other colors.
The method of claim 4,
When the image is composed of four colors y, m, c, and k,
Y of the hidden image matches the k-dot angle of the background image,
M of the hidden image coincides with the c-dot angle of the background image,
C of the hidden image matches the m-dot angle of the background image,
Wherein the k of the hidden image corresponds to the y-dot angle of the background image.
The method of claim 3,
Wherein the image comprises a combination of multicolor primary colors having mutually different dot angles,
Wherein the multi-color dot angle of the hidden image is set to a square value between dot angles of original colors of the background image.
7. The method according to any one of claims 1 to 6,
And deletes the halftone dots split at the image boundary of the background image and the hidden image when the halftone dots are less than a specific ratio than the original size.
In the printed matter in which the identification pattern of claims 1 to 7 is expressed,
Further comprising a convex coating layer having a bow (LPI) corresponding to a multiple of the dotted line prime (LPI) of the image on the printed matter on which the identification pattern is expressed.
The method of claim 8,
Wherein the convex coating layer is formed by a process of scratching the laminating layer formed on the upper surface of the substrate with LPI having the same resolution as the LPI.
CLAIMS 1. A method for producing a printed matter representing a visual image as a set of halftone dots,
Converting the original image into a halftone dot image represented by a halftone dot having a predetermined dot-dot player (LPI)
Changing a part of the halftone dot image to a halftone dot image different from the original halftone dot image to form a hidden image,
And printing a halftone dot image on which the hidden image is formed to obtain a printed matter.
The method of claim 10,
Wherein the LPI of the printed halftone dots has a high resolution of at least 195 LPI or more so that the difference in dot angle is not visually evident.
The method of claim 11,
Further comprising changing the dot angle of the hidden image to be different from the original dot angle.
The method of claim 12,
The original image can be divided into primary colors of multiple colors,
Wherein the halftone angles of the hidden images having the separated halftone angles coincide with the original halftone angles of the other halftone colors.
The method of claim 12,
The original image can be divided into primary colors of multiple colors,
Wherein the image comprises a combination of multicolor primary colors having mutually different dot angles,
Wherein the halftone angles of the separated hidden image having the halftone angles are set to a square value between original halftone angles of different colors.
The method according to any one of claims 10 to 14,
Printing a halftone dot image on which the hidden image is formed to obtain a printed matter,
Wherein a printing plate on which the halftone dot image is expressed is produced and printed.
The method according to any one of claims 12 to 14,
Printing a halftone dot image on which the hidden image is formed to obtain a printed matter,
Wherein the output is obtained by varying the output according to the halftone dot angle of the halftone dot image and the hidden image.
The method of claim 12,
Forming a coating layer on top of the produced printed matter,
Scratching the coating layer with a LPI of the same resolution as the LPI of the dot image,
The method of claim 1, further comprising the step of:
The method of claim 12,
Wherein a moiré scale is verified by placing a transparency film having a dotted line of a forehead (LPI) corresponding to a multiple of the LPI of a halftone dot image of the printed matter on an upper portion of the produced printed matter. Gt;

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