JP3987938B2 - Identification and authentication method and system - Google Patents

Description

The present invention is an identification and authenticity identification method and system for an automatic machine that handles identification such as a passport authenticity automatic determination machine, printed on a passport, a driver's license, an identification card, a paper sheet, a card, The present invention relates to authenticity identification and a system thereof, which is given a value by being stretched with a film.

Conventional techniques include, for example, a method of distinguishing the presence or absence of ink fluorescence by irradiating with ultraviolet light (light having a wavelength shorter than 400 nm), or infrared light transmittance of ink by irradiating infrared light (light having a wavelength longer than 700 nm). There is a method for discriminating the presence or absence of the above (for example, see Patent Document 1).
JP 58-86677 A

This is because most of the ID printing uses ordinary inks that do not emit fluorescence or infrared transmission, and fluorescent emission inks or infrared transmission inks are used only in specific places for the purpose of preventing counterfeiting. Because.

In this way, when identifying the authenticity of the identification card, in addition to confirming the matching of the printed pattern with visible light (light of 400 nm to 700 nm), ultraviolet light or infrared light is irradiated to a specific place for the purpose of preventing counterfeiting. It has been confirmed that the printed portion has fluorescence emission and infrared transparency.

In the above-described authenticity discrimination method, ultraviolet rays or infrared rays are irradiated to a specific place aimed at preventing forgery, and whether or not the printed portion has fluorescence emission or infrared transparency is checked, and the authenticity is determined by the emission color and shape. Is judged.

However, fluorescent sign pens that fluoresce are easily available, and now the UV light source is commercially available as fluorescent lamps such as black light (UV fluorescent lamps that cut visible light with the filter characteristics of the glass tube itself). It is becoming possible to counterfeit the colors and shapes.

In addition, infrared transmissive inks can be easily obtained, and at the present time when infrared cameras are commercially available, it is possible to forge a pattern of transmissive ink.

Therefore, the above-described authenticity discrimination method can only be expected to have the capability of an auxiliary means for preventing forgery, and there has been a problem that it is impossible to reliably distinguish forgery.

Further, in the above-described authenticity identification method, the printed part other than the face photograph is exactly the same as the authenticity identification card for a modified identity identification card, that is, a part of the authenticity identification card (for example, a face photograph). Because of this, there was a problem that it was impossible to distinguish.

The present invention has been made to solve the above-mentioned problems, and its purpose is to more accurately identify the identity of the identity card and to distinguish not only counterfeit tickets but also counterfeit tickets. Is to provide new technology.

Among the inventions disclosed in the present application, the outline of typical ones is as follows.

In a method for authenticating an identity card in which a film is stretched on a printing surface, a first discrimination step for determining a material of the film stretched on the printing surface of the identification card; and on the printing surface of the identification card It comprises a second discrimination step for determining the thickness of the film stretched on the film, and the authenticity of the identification card is discriminated based on the determination result of these two steps.

In the identification method of an identity card in which a film is stretched on the printing surface, the presence or absence of infrared absorption by the film is measured to determine the authenticity of the identity card.

In a method of authenticating an identity card in which a film is stretched on a printing surface, the thickness of the film is measured by a confocal optical system and a scanning device to determine the authenticity of the identity card.

The thickness of the film stretched on the printing surface of the identification card by using a confocal optical system and a first authenticity discrimination means for determining the material of the film stretched on the printing surface of the identification card by infrared rays Information on the material and thickness of the film of various identification cards, second discrimination means for judging authenticity, discrimination judgment processing means for judging discrimination of authenticity based on the measurement results by each of these authenticity judgment means An identity authenticity discrimination system is created, which includes a database storing information, an input means for inputting information relating to an identification being identified, and a display means for displaying a discrimination result.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.

By determining the material and thickness of the film, it is possible to more accurately identify the identity of the identity card.

In addition, since an altered identification card is inevitably accompanied by a change of the film, the identification of the altered identification card can be made by determining the material and thickness of the film.

Further, if the present invention is used, a high level of forgery prevention effect can be obtained. That is, the counterfeiter needs to obtain a film whose material and thickness are the same as those of the genuine passport during the counterfeiting. In other words, counterfeiting is a high risk for counterfeiters.

Furthermore, if the genuine passport uses a film with a material and thickness that are not commercially available, the counterfeiter will need to manufacture the film at the time of counterfeiting, and the counterfeiting will be even more risky. Become.

Further, by using the confocal optical system, the thickness of the film can be measured with an accuracy of about 1 micron without peeling the film from the mount, that is, without destroying the passport. In order to verify the authenticity of a passport, it is necessary to measure the film thickness with an accuracy of about 1 micron. Therefore, by using a confocal optical system, it becomes possible for the first time to perform a non-destructive authenticity evaluation of a passport by the thickness of the film.

FIG. 1 is a diagram showing a configuration of a passport authenticity automatic determination machine for authenticating a passport as an embodiment of a system for authenticating an identity card according to the present invention.

As shown in FIG. 1, a passport authenticity automatic determination machine 1 according to the present embodiment includes a sample stage 2 on which a sample is placed, a unit 3 for measuring the material of a film stretched on the passport printing surface, and a passport printing surface. A unit 4 for measuring the thickness of the film stretched on the film, an input unit 5 for inputting the nationality of the passport to be inspected, a database 6 in which data relating to passports of each country are stored, and data and a database measured by the measuring unit The passport discrimination unit 7 that discriminates authenticity based on the data sent from and the display unit 8 that displays the determination result of authenticity. In addition, the control part of each part which is not directly related to this invention is not shown in figure.

Next, the material determination unit / thickness measurement unit of this embodiment will be described. 2 and 3 are diagrams for explaining the material determination unit 3 and the thickness measurement unit 4 in the present embodiment.

In the passport authenticity automatic determination machine, the determination of the material and thickness of the film stretched on the printed surface of the passport is effective for distinguishing the passport.

This is because the falsification of the passport involves a film replacement, and the material and thickness of the film are detected by the material determination unit 3 and the thickness measurement unit 4, and the passport input from the detection result is differentiated. be able to.

As shown in FIG. 1, the passport placed on the sample table has a configuration in which data is collected by the material determination unit 3 and the thickness measurement unit 4.

In order to discriminate not only counterfeit products but also alteration products, the material determination unit 3 and the thickness measurement unit 4 are configured to collect film data in the vicinity of a facial photograph.

As shown in FIG. 2, the material determination unit 3 irradiates infrared light from an infrared light source 31, makes the infrared light vertically incident on the film stretched on the passport by the beam splitter 32, and reflects it from the passport. Light is detected by the detector 33, and the presence or absence of infrared absorption by the film stretched on the passport is identified.

In addition, the infrared wavelength used for the material inspection is matched to the absorption wavelength of the film used for the sample.

Furthermore, when there are a plurality of absorption wavelengths of the film, a light source and a sensor having a plurality of wavelengths are provided. Thereby, the accuracy can be improved.

The thickness measuring unit 4 measures the thickness of the film using a confocal optical system as shown in FIG. The monochromatic light is emitted from the laser light source 41, passes through the confocal optical system 42, and then enters the detector 43. The film thickness is measured by monitoring the intensity of the signal entering the detector while moving the sample stage 2 up and down.

Furthermore, as a method of measuring the thickness with a confocal optical system without moving the sample stage up and down, a method of arranging two or more lenses in series, a method of using chromatic aberration of a lens, and a plurality of lenses having different focal lengths There are methods to prepare and switch between them, but these methods may be used.

In order to measure the thickness of the film with an accuracy of about 1 micron, the following device is necessary.

Since the measurement accuracy is lowered due to the distortion of the sample, a weight having an appropriate weight is placed on the sample in order to suppress the warp of the sample.

Further, the thickness measurement position is scanned by the scanning device 44, and the thickness is measured at a plurality of locations. The calculation accuracy is improved by obtaining an average value of a plurality of measurement results by the computer 45.

Next, processing of the passport authenticity automatic determination device 1 of the present embodiment will be described. FIG. 4 is a flowchart for explaining the processing of the passport authenticity automatic determination device 1 of the present embodiment.

In the passport authenticity automatic determination machine of this embodiment, a passport to be identified is placed on the sample table 2.

In the passport authenticity discrimination processing unit, film material determination using infrared rays and film thickness measurement using a confocal optical system are performed, and the determination result is sent to the discrimination data processing unit.

On the other hand, the material and thickness information based on the entered nationality data is sent to the discrimination data processing unit.

And the result of the above-mentioned discrimination processing is compared with the data of a database, and comprehensive judgment is performed.

The result of the comprehensive determination is sent to the determination result display to notify the device user of the determination result.

As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Of course.

It is a figure which shows the structure of the passport authenticity automatic determination machine which performs authenticity discrimination of the passport concerning embodiment of this invention. It is a figure for demonstrating the material determination unit 3 of the passport authenticity automatic determination machine in this embodiment. It is a figure for demonstrating the thickness measurement unit 4 of the passport authenticity automatic determination machine of this embodiment. 5 is a flowchart for explaining processing of the passport authenticity automatic determination device 1 of the present embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Passport authenticity automatic determination machine, 2 ... Sample stand, 3 ... Material determination unit, 31 ... Infrared source, 32 ... Beam splitter, 33 ... Infrared detector, 4 ... Thickness measurement unit, 41 ... Laser light source, 42 ... Confocal optical system, 43 ... CCD, 44 ... scanning device, 45 ... computer, 5 ... nationality input unit, 6 ... database, 7 ... passport discrimination unit, 8 ... determination result display unit

Claims (3)

In the authenticity identification method of an identification card with a film stretched on the printing surface, a first determination step of determining the material of the film stretched on the printing surface of the identification card according to the presence or absence of mid-infrared absorption by the film ; The thickness of the film stretched on the printing surface of the identification card is adjusted with the confocal optical system.
An identification method, comprising: a second determination step determined by a canning device, wherein the authenticity of the identification is determined based on the determination result of the two steps. An identification / authentication method for identifying an identity card in which a film is stretched on a printed surface, wherein the thickness of the film is determined by a confocal optical system and a scanning device. First determination means for determining the material of the film stretched on the printing surface of the identification card according to the presence or absence of mid-infrared absorption by the film;
Second determination means for determining the thickness of the film stretched on the printing surface of the identification card using a confocal optical system and a scanning device ;
An input means for the operator to input the type of identification being identified;
Stores the material and thickness data of various ID cards, and the information input by the input means.
Based on the report, a database that appropriately transfers data on material and thickness to the post-discrimination processing means
And
The film material and thickness determined by the determination means are compared with the data transferred from the database, and the difference is compared with a predetermined threshold value to determine the authenticity of the identification card. Processing means;
An identification authenticity discrimination system comprising: a display means for notifying an operator of a result of the discrimination performed by the discrimination processing means.

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