KR101658557B1

KR101658557B1 - Identification pattern and printed matter having that, and producing method thereof

Info

Publication number: KR101658557B1
Application number: KR1020150126821A
Authority: KR
Inventors: 설진영; 이은범
Original assignee: 주식회사 무궁화엘앤비
Priority date: 2015-09-08
Filing date: 2015-09-08
Publication date: 2016-09-21

Abstract

The present invention relates to an identification pattern, more specifically, which is clearly identified under a limited condition. Moreover, in a pattern to express a visual image with gathering of a halftone dot, a portion of the image has a halftone dot angle different from that of a background image to form a hidden image. As stated above, according to the present invention, the identification pattern can be easily realized without expensive equipment or additional special equipment to be easily realized at a low cost in a small amount of printed matter. Moreover, the identification pattern can be adopted to a digitalized image to be realized in an 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 problems, the present invention provides a pattern for representing a visual image as a set of halftone dots, wherein a part of the image has a dot angle different from the dot angle of the background image Thereby forming a hidden image.

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 angle different from the original halftone dot angle to form a hidden image, and printing a halftone dot image on which the hidden image is formed to obtain a printed matter.

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.

At this time, in the case of an image formed by color, it is usually divided into four primary colors of Y (Yellow), M (Magenta), C (Cyan), and K (Black) , C, and K, and the color of each of them is cumulatively printed on a single sheet of paper. In this way, an image of a natural color tone as shown in FIG. 1 is obtained. As shown in FIG. 2, it can be seen that it is composed of a plurality of halftone gatherings. In this case, the small rose pattern is called a rosette. However, in this embodiment, separation into the four primary colors of Y, M, C, and K is taken as an example. However, it is also possible to obtain color hues by combining a plurality of different primary colors.

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.

As shown in FIG. 4, the remaining area except the hidden image area has a background angle of Y = 7.5, M = 52.5, C = 22.5, and K = 85.5. The separated area of FIG. 5 becomes a hidden image, and has a halftone angle different from that of the background image, for example Y = 82.5, M = 22.5, C = 52.5 and K = 7.5.

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 respective colors constituting the background image, It is possible to coincide with.

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 But it is possible to minimize the interference between colors and minimize the moire 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, in another embodiment of the present invention, the halftone angles of the respective colors constituting the hidden image are dispersed and positioned between the adjacent halftone angles of the respective colors constituting the background image, It is also possible to minimize the visibility of the hidden image by dispersing the dot angle between various colors.

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. This can be applied not only to the case where the background image and the hidden image have the same player but also to the case where the density of the background image and the hidden image are different by having the dot image of the background image and the hidden image, as 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.

Further, 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 -20 LPI is adjusted from the dot image of the background image to the background image of the hidden image, The difference in the angle of the halftone dot between the background image and the hidden image can not be visually recognized.

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 If a transparent film having a dot player such as 1/3 times, 1/2 times, 2 times, 3 times, or the like corresponding to a reciprocal of a natural number of natural numbers or a natural number multiple of a dot pattern of a test pattern is placed, Moire patterns generated in the image and the hidden image are different from each other, so that the authenticity of the detected 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 the printed matter on which the detection pattern is expressed, and the coating layer is formed of a convex pattern having a roughly spherical cross-section so as to have an effect of enlarging the pattern as a convex lens The pattern is periodically formed so as to correspond to a reciprocal of the natural number of the identification pattern or a multiple of the natural number.

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

For a pattern that represents a visual image as a set of halftone dots,
Wherein a portion of the image has a dot angle different from a dot angle of the background image to form a hidden image,
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.

The method according to claim 1,
Wherein the dotted line (LPI) has a high resolution of at least 195 LPI.

delete

The method according to claim 1,
(LPI) of the halftone dots of the background image and the hidden image are different from each other,
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 any one of claims 1, 2 or 6,
Wherein the background pattern is deleted when a halftone dot split at the image boundary of the background image and the hidden image is smaller than a predetermined ratio smaller than the original size.

In a printed matter in which the identification pattern of Claim 1, 2 or 6 is expressed,
Further comprising a convex coating layer having a bow (LPI) corresponding to a reciprocal of a natural number of the dotted line prime (LPI) of the image or a multiple of a natural number 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 halftone dots having a predetermined halftone dot angle,
Changing a part of the halftone dot image to a halftone dot angle different from the original halftone dot angle to form a hidden image,
Printing a halftone dot image on which the hidden image is formed to obtain a printed matter,
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 angle of the hidden image is set to a square value between original halftone angles of different colors.

The method of claim 10,
Characterized in that the LPI of the printed halftone dot has a high resolution of at least 195 LPI.

delete

12. The method according to claim 10 or 11,
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.

12. The method according to claim 10 or 11,
Printing a halftone dot image on which the hidden image is formed to obtain a printed matter,
And printing the printed matter with different output directions according to the halftone angles of the halftone dot image and the hidden image.

The method of claim 10,
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 10,
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;