KR100953428B1 - Security printed material inspecting device and automatic inspection system using CCD camera - Google Patents

Abstract

The present invention relates to a security print authenticity identifier and an automated inspection system using a CCD camera. The light of the LED lamp reflected on the printed matter is incident on the image pickup device of the camera to image the photographed image, and then image analysis is performed to determine whether the printed matter is authentic. It is an object of the present invention to provide a security print authenticity identifier and an automated inspection system using a CCD camera that can be used to more accurately determine the accuracy.

Security print authenticity identifier using the CCD camera of the present invention to achieve the above object, security print authenticity identifier for identifying the authenticity of the print by identifying the security code displayed on the print, including banknotes, gift certificates, passports, identification card A housing comprising: a housing detachable from a mount of a CCD camera and provided with a projection port facing a lens of a camera on each side and a projection port facing a printed matter to be determined; A plurality of LED lamps mounted outside the step openings of the housing to irradiate light toward the printed matter; An optical filter installed in the housing to filter light of the LED lamps incident on the camera module after being reflected by the printed matter; An imaging optical system installed inside the housing to adjust a focal length for photographing printed matter; And a power supply means for supplying operating power to the LED lamp, wherein the LED lamp is configured by combining at least two or more of an ultraviolet LED lamp, a visible LED lamp, and an infrared LED lamp, and photographing an image of the photographed printed matter. Alternatively, authenticity separators using a CCD camera are provided, characterized in that the authenticity of the security code can be identified through comparison / analysis with the reference image or an automated system by storing as video data.

On the other hand, the security print automated inspection system using a CCD camera according to an embodiment of the present invention stores and manages the data on the security print authenticity identifier and the security print transmitted from the authenticity identifier coupled to the CCD camera, the mount of the CCD camera Includes a server for

CCD (Charge Coupled Device) camera, security code, printed matter, LED lamp, optical filter, imaging optical system

Description

Security printed material inspecting device and automatic inspection system using CCD camera}

The present invention relates to a security print authenticity identifier and an automated inspection system using a CCD camera. More particularly, the screen or image data photographed by filtering the light of the LED lamp reflected on the printed matter and forming an image on the image pickup device of the camera is used. It is possible to discriminate the authenticity of printed matters, and to automatically check the image formed on the CCD by the program to enable automatic inspection. The present invention relates to a security print authenticity identifier and an automated inspection system.

In general, security codes are printed on printed matters such as banknotes, gift certificates, identification cards, and passports to prevent forgery. The security code is usually printed with an ink containing a fluorescent material to have a special color / color, or is formed to have a variety of shapes through fine characters or hologram printing.

A device for identifying authenticity of printed matters by identifying such a security code, and a conventional security print authenticity identifier reflects light irradiated by a lamp (for example, an ultraviolet fluorescent lamp) that generates light in a specific frequency range by using a reflector. The light reflected by the reflector is projected onto the subject to read the light reflected from the subject.

However, due to the configuration of the lamp and the reflector as described above, the device was inevitably large. Therefore, it is difficult to provide a security print authenticity identifier in a store where banknotes or gift certificates are commonly used, and thus the spread of the authenticity identifier is delayed, and thus, there is a problem in that preparation for counterfeit crimes of the security print cannot be efficiently performed.

Meanwhile, with the development of counterfeit technology, the method of printing security codes is also diversifying. The conventional security print authenticity identifier is specific to a method of selectively detecting ultraviolet rays or a specific visible region, and a new security code printing method is used. It could not be used interchangeably with other media, such as currency and gift certificates. Accordingly, a number of various security print authenticity identifiers are required according to the type of security print requiring identification, which makes it more difficult to spread the authenticity identifier.

In order to improve this problem, there is a "portable security printed authenticity identifier" (patent no. 775033) proposed by the applicant. This is configured to determine the authenticity of the printed matter by irradiating the light of the LED lamp toward the printed matter, and the light reflected on the printed matter passes through the imaging optical system and the optical filter to the user's naked eye. Such authenticity identifiers are significantly smaller than conventional identification devices so that they can be easily carried, and can be applied to identification of various security codes through selection of emission frequency and irradiation angle by LED lamps. You can solve the problem.

However, the authenticity identifier may cause errors caused by the inspector's subjectiveness due to the method of relying on visual inspection, and accuracy may be reduced in the case of very fine identification codes due to the resolution of the human eye and the magnification limitation of the usable imaging optical system. There is a problem that can be.

The present invention is to solve the problems described above, an object of the present invention is to image the image taken by imaging the light of the LED lamp reflected on the printed material to the image pickup device (CCD) and then conduct the image analysis to conduct the image authenticity It is to provide a security print authenticity identifier and an automated inspection system using a CCD camera that can more accurately determine whether or not, and automated image inspection on the CCD to enable automatic inspection.

According to the present invention for achieving the above object, in the security print authenticity identifier for identifying the authenticity of the printed matter by identifying the security code displayed on the printed matter, including bills, gift certificates, passports, identification card, mount of the CCD camera A housing that is coupled to and formed on both sides with a macro sphere facing the lens of the camera and a projection sphere facing the printed matter to be determined; A plurality of LED lamps mounted outside the step openings of the housing to irradiate light toward the printed matter; An optical filter installed inside the housing to filter light of the LED lamps incident on the CCD after being reflected by the printed matter; An imaging optical system installed inside the housing for photographing printed matter; And a power supply means for supplying operating power to the LED lamp, wherein the LED lamp is configured by combining at least two or more of an ultraviolet LED lamp, a visible light LED lamp, and an infrared lamp. A security print authenticity identifier and an automated inspection system using a CCD camera are provided so that the authenticity of a security code can be identified through a comparison with a reference image or a programmed automatic analysis system by storing as moving image data.

The visible light LED lamp may be composed of a plurality of LED lamps each having a unique color different from each other, the LED lamps of each color may be configured to control the blinking individually.

Preferably, a mounting surface is formed around the affix, and a plurality of LED lamps are arranged in an annular or dome shape on the mounting surface.

In addition, an entrance may be formed at at least one side of the housing so that the optical filter may be inserted and withdrawn through the entrance to be replaced.

On the other hand, the security print automated inspection system using a CCD camera according to an embodiment of the present invention stores and manages the data on the security print authenticity identifier and the security print transmitted from the authenticity identifier coupled to the CCD camera, the mount of the CCD camera Includes a server for

Here, the authenticity identifier is a control unit for individually controlling the operation of the LED lamp and the LED lamp configured by combining at least two or more of the ultraviolet LED lamp, visible light LED lamp, infrared lamp according to the type of security code individually or group. It can be configured to include.

In addition, the authenticity identifier may be provided with an imaging optical system for adjusting the focal length for photographing the printed matter.

According to the present invention as described above has the following advantages.

First, the light emitted by the LED lamp is irradiated to the printed matter, and the light reflected by the printed matter is incident on the CCD through the optical filter and the imaging optical system to capture the captured image using a separate identification system. By making it possible to determine the authenticity, there is an effect of improving the accuracy and reliability of discrimination by identifying the captured image more objectively and precisely.

In addition, by individually controlling different types of LED lamps emitting light of different frequency bands, such as infrared rays, ultraviolet rays, visible light of various colors, and individually controlling LED lamps having different installation angles and positions, By providing the light of the frequency band and the irradiation angle which is most suitable for the identification according to the security code type of, it can be used for general purpose in the forgery of various kinds of printed materials, and it has the advantage of improving the accuracy of discrimination.

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram schematically showing a security print authenticity identifier using a CCD camera according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the internal structure of the security print authenticity identifier of FIG.

As shown, the security print authenticity identifier using the CCD camera of the present invention, the housing 100 is formed on both sides of the affix 101 and the projection port 102 and coupled to the mount 21 of the CCD camera 20, respectively. ), LED lamps 111 and 113 mounted outside the affix 101 of the housing 100, an optical filter 105 installed inside the housing 100, and an inside of the housing 100. An imaging optical system 103 installed between the optical filter 105 and the projection port 102, a light projection cover 108 and 109 mounted to the macro projection 101 and the projection port 102, and the LED lamp 111 And a control unit 120 for controlling the operation of the power supply unit 113, and a power supply unit (not shown) for supplying operating power to the LED lamps 111 and 113 through the control unit 120.

The housing 100 may be formed in various shapes such as a cube or a cylindrical shape, and the affix 101 may be a lens of the CCD camera 20 so that the affix 101 is close to the printed matter 50 as a subject. (25) It is disposed in the front and is formed in a proper shape so as to maintain a stable position. The mounting surface 107 on which the LED lamps 111 and 113 are installed is formed around the affix 101, and the mounting surface 107 may be provided with LED lamps 111 and 113 at various angles. It may be formed so as to be inclined or horizontal.

In addition, the housing 100 is provided with a coupling means to be detachable in front of the lens 25 of the CCD camera 20. The coupling means may have a structure in which the projection port 102 is coupled to the mount 21 of the CCD camera 20 in an inserting manner, but the present invention is not necessarily limited thereto. It may consist of various conventional structures. For example, as in the case of a known camera filter or a lens barrel, the housing 100 may be coupled by a screwing method, or the housing may be formed on the surface of the case 10 of the camera by using a suction plate made of rubber or a flexible resin. 100 may be attached, or may be configured such that the housing 100 is mounted to the CCD camera 20 by a fitting method using a hook structure or a coupling protrusion that is elastically deformed.

The LED lamps 111 and 113 are made of LEDs that generate light in various frequency ranges, such as an ultraviolet LED lamp 111, a visible light LED lamp 113, and an infrared LED (not shown), and the visible light LED lamp 113 is It is preferable that a plurality of color LEDs emit light of different colors. In this case, it is preferable that the LED lamps 111 and 113 be selectively flashed through the control unit 120 according to the type of security code.

The optical filter 105 is irradiated by each of the LED lamps (111, 113) to pass or block the light of a specific frequency region of the light reflected on the printed matter 50, the light of a suitable frequency band for security code identification By forming an image into the mount 21 of the CCD camera 20, various kinds of things may be used depending on the type of security code of the printed matter 50. In addition to the optical filter 105, the present invention is applicable to all optical components capable of selectively converging by separating wavelengths.

The imaging optical system 103 adjusts the working distance (WD) so that an image of the adjacent printed matter 50 may be imaged on a charge coupled device (CCD), and one or more may be installed.

The controller 120 controls the blinking of the LED lamps 111 and 113 individually or by a predetermined group, and may be formed of a conventional LED driving circuit. According to an embodiment of the present invention, the circuit board may be installed on one side of the housing 100, but when the LED lamps 111 and 113 are controlled, problems such as a change in the central axis may occur due to shaking. Accordingly, the controller 120 may be separately installed outside the device.

The power supply means is for supplying power for the operation of the LED lamps 111 and 113 through the control unit 120, it may be made of a structure using an external power source or its own power supply. As a structure using an external power source, the power source of the outlet can be used through an AC / DC adapter, and in some cases, a cable and a connector connected to the USB terminal may be used. In addition, the structure using the self power source may be made of a structure provided with a connection terminal to mount the battery on one side of the housing (100).

The authenticity identifier of the present invention configured as described above enables the identification of the authenticity using the photographed image by photographing the security code of the printed matter using a camera employing a dedicated CCD for identifying the authenticity of the security print.

That is, when power is supplied by connecting an adapter or the like with the entrance port facing the surface of the printed matter 50, the LED lamps 111 and 113 emit light to emit light of a predetermined frequency region onto the printed matter 50 surface. . The irradiated light is reflected by the printed matter 50 and is incident into the mount 21 of the CCD camera 20 through the optical filter 105 and the imaging optical system 103 inside the housing 100. Accordingly, an image of the surface of the printed matter 50 is imaged and photographed by the image pickup device of the camera, and the photographed image may be recorded as photograph or video data.

As described above, when photographing of the printed matter 50 is performed, the authenticity of the security code may be determined by a method such as comparison with the reference image. At this time, a more detailed image can be observed using the zoom function of the camera. Furthermore, by comparing and analyzing the photographed image data through the circuit and software, it becomes possible to determine the objective and accurate authenticity more than the determination by the naked eye.

Therefore, anyone can easily determine whether the forgery of the printed matter 50 at a short time in the desired place, and it is possible to proactively cope with various printed material forgery crimes and prevent damage by expanding the installation and use of the authenticity identifier.

In addition, as shown in Figure 6, through the image discrimination system it is possible to more accurately and objectively determine the security printed matter, in particular, it is possible to implement an automated system for continuously discriminating a large amount of printed matter.

In addition, the identifier of the present invention captures more effective images for authenticity identification according to the type of LED lamps 111 and 113, the light irradiation angle, and the type of the optical filter 105 that emit light.

For example, by properly using the optical filter 105 as shown in comparison with FIG. 3, a clearer and more detailed image of the security code feature can be obtained, and as shown in FIG. 111) to obtain a specialized image different from the case of using the LED lamp of the visible light band, as shown in Figs. 4 and 5 to obtain a holographic image appearing different depending on the irradiation angle of the LED lamps (111, 113). It may be. Through this, it is possible to further improve the accuracy of authenticity determination by photographing various images according to the type of security code to be identified.

On the other hand, although not shown, the authenticity identifier according to the present invention may be configured to replace the optical filter 105 according to the type of security code of the printed matter. For example, by forming an entrance opening and closing by a cover on one side of the housing 100, the optical filter 105 can be inserted into the filter holder through the entrance or withdraw the inserted optical filter 105 can be easily replaced. It can be configured to. In this case, since the optical filter 105 suitable for authenticity can be easily mounted according to the type of security code of the printed matter 50, there is an advantage in that the versatility and ease of use of the device are further improved.

In addition, the LED lamps (111, 113) may be made of a modular structure detachable to the housing 100. For example, a plurality of LED lamps 111 and 113 installed on the support surface of the housing 100 may be mounted through a circuit board and provided with a connector that is connected according to the combination of the circuit board and the housing 100. According to the present invention, the LED lamps 111 and 113 may be easily installed to be replaced with other modules having various positions, intervals, irradiation angles, and the like. This can also be equipped with a module installed with the LED lamps 111 and 113 at the appropriate angle and position according to the security code type of the printed matter 50 can increase the accuracy of authenticity determination and improve the generality and convenience of the device.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a configuration diagram schematically showing a security print authenticity identifier using a CCD camera according to an embodiment of the present invention.

2 is a cross-sectional view showing the internal structure of the security print authenticity identifier of FIG.

Figure 3 shows a comparison of the photograph of the printed matter taken by the security print authenticity identifier of the present invention when the optical filter is not used and used.

Figure 4 shows a comparison of the photograph of the printed matter taken by the authenticator of the present invention when the ultraviolet LED lamp and the visible light LED lamp emits light.

Figure 5 shows a photograph of the printed matter taken by the authenticity of the present invention, it shows a change in the photographed image according to the light irradiation angle of the LED lamp for the printed material consisting of the identification code hologram.

Figure 6 is a schematic diagram showing a security print automated inspection system using a CCD camera according to an embodiment of the present invention.

Claims (8)

In the security print authenticity identifier for identifying the authenticity of the print by identifying the security code displayed on the print, including banknotes, gift certificates, passports, identification card, CCD camera; A housing detachable from the mount of the CCD camera, and having a macro sphere on both sides facing the lens of the camera and a projection sphere facing the printed matter to be determined; A plurality of LED lamps mounted outside the step openings of the housing to irradiate light toward the printed matter; An optical filter installed inside the housing to filter light of the LED lamps incident on the CCD after being reflected by the printed matter; An imaging optical system installed inside the housing to adjust a focal length for photographing printed matter; And It includes a power supply means for supplying operating power to the LED lamp, The LED lamp is configured by combining at least two or more of ultraviolet LED lamp, visible LED lamp, infrared lamp, and stores the image of the printed image as photographic or video data to identify the authenticity of the security code through comparison with the reference image Security print authenticity identifier using a CCD camera, characterized in that enabled. delete The method of claim 1, The visible light LED lamp is made of a plurality of LED lamps each having a unique color different from each other, and the security print authenticity identifier using a CCD camera, characterized in that the LED lamps of each color is configured to control the blinking individually. The method of claim 1, And a mounting surface is formed around the affix, and a plurality of LED lamps are arranged in a ring shape or a dome shape on the mounting surface. The method of claim 1, An entrance is formed on at least one side of the housing, the security print authenticity identifier using a CCD camera, characterized in that configured to be replaced by inserting and withdrawing the optical filter through the entrance. CCD camera; A security print authenticity identifier coupled to the mount of the CCD camera; And Including a server for storing and managing data on the security prints transmitted from the authenticity identifier, The security print authenticity identifier is a security print automated inspection system using a CCD camera, characterized in that it comprises an imaging optical system for adjusting the focal length for photographing the printed matter. The method of claim 6, The authenticity identifier may include: an LED lamp configured by combining at least two or more of an ultraviolet LED lamp, a visible LED lamp, and an infrared lamp; And Security printing automated inspection system using a CCD camera, characterized in that made of a control unit for controlling the operation of the LED lamp according to the type of security code individually or each group. delete

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