JP2005085163A - Authenticity examination method for printed matter - Google Patents

Authenticity examination method for printed matter Download PDF

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JP2005085163A
JP2005085163A JP2003318873A JP2003318873A JP2005085163A JP 2005085163 A JP2005085163 A JP 2005085163A JP 2003318873 A JP2003318873 A JP 2003318873A JP 2003318873 A JP2003318873 A JP 2003318873A JP 2005085163 A JP2005085163 A JP 2005085163A
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ray
banknote
fluoroscopic image
authenticity
printed
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Koichi Yamada
幸一 山田
Takeshige Tanigaki
武重 谷垣
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MEDEIEKKUSUTEKKU KK
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MEDEIEKKUSUTEKKU KK
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<P>PROBLEM TO BE SOLVED: To provide a method for accurately and quickly examining authenticity of a printed matter. <P>SOLUTION: Soft X-rays of about 0.1 to 2keV are generated by an X-ray generator 2 of an X-ray inspection device 1 and are radiated to paper money on a sample stage 3, and ink-printed parts on the front side and the rear side of the paper money 10 and a watermark part are simultaneously imaged into one radiographic image by an X-ray detector 4 using a flat panel X-ray sensor or the like, and the radiographic image is collated with a template by a computer 5 to examine authenticity of the paper money 10. and an examination result and the radiographic image of the paper money 10 are displayed on a monitor 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、紙幣、金券類又は有価証券類等の印刷物の真偽の鑑定方法に関する。   The present invention relates to a method for authenticating printed matter such as banknotes, vouchers or securities.

現在の紙幣には、偽造や改竄を防止するために、磁性インキ印刷部や透かし部（透かし模様、識別マーク）等が設けられている。   Current banknotes are provided with a magnetic ink printing section, a watermark section (watermark pattern, identification mark), and the like in order to prevent forgery and tampering.

このような紙幣の真偽鑑定方法として、紙幣の裏面又は表面の全面に対して発光ダイオードの光源により光を当て、当該紙幣の表面又は裏面のインキ印刷部全体を把握すると共に、透かし部の位置及び形を確認して、これらの鑑定要素をマスタープレートと照合することにより紙幣の真偽鑑定を行う方法が知られている（例えば、特許文献１参照）。
特開２００１−３２５６３９号公報 As such a bill authenticity judgment method, the light source of the light emitting diode is applied to the entire back surface or front surface of the bill to grasp the entire ink printed portion on the front surface or back surface of the bill, and the position of the watermark portion. And the method of confirming authenticity of a banknote by checking these forms and collating these appraisal elements with a master plate is known (for example, refer patent document 1).
JP 2001-325639 A

しかしながら、上述の真偽鑑定方法により、紙幣の表面及び裏面の両面のインキ印刷部に基づいて真偽鑑定を行う場合には、表面又は裏面の一方の面の鑑定が終了した後に、当該紙幣を裏返すと共に適切なマスタープレートに交換する必要があり、その交換作業に手間と時間を要し、迅速な真偽鑑定の妨げとなる。   However, when authenticating based on the ink printing parts on both sides of the front and back of the banknote by the above-described authenticity evaluation method, the banknote is It is necessary to turn it over and replace it with an appropriate master plate, which requires time and labor for the replacement work, and hinders rapid authenticity.

これに対し、上述の真偽鑑定方法により、紙幣の表面又は裏面の一方の面のみに基づいて真偽鑑定をすると、少ない鑑定要素に基づいて紙幣を真偽鑑定することとなるため、必然的に真偽鑑定の精度が劣るものとなり、正確な真偽鑑定を達成することは出来ない。   On the other hand, since it is necessary to authenticate a bill based on a small number of appraisal elements when authenticating based on only one side of the front or back side of the bill by the above-described authenticity appraisal method, it is inevitable. However, the accuracy of the authenticity test is inferior, and an accurate authenticity test cannot be achieved.

本発明は、紙幣、金券類又は有価証券類等の印刷物の真偽の鑑定方法に関し、特に、正確且つ迅速に印刷物の真偽を鑑定することが可能な印刷物の真偽鑑定方法を提供することを目的とする。   The present invention relates to a method for authenticating printed material such as banknotes, vouchers or securities, and in particular, to provide a method for authenticating printed material that can accurately and quickly determine the authenticity of printed material. With the goal.

上記目的を達成するために本発明によれば、表面及び／又は裏面が印刷された印刷物に対してＸ線を照射して、前記印刷物のＸ線透視像を撮像し、前記Ｘ線透視像に基づいて前記印刷物の真偽を鑑定する印刷物の真偽鑑定方法が提供される。   In order to achieve the above object, according to the present invention, a printed material on which the front surface and / or the back surface is printed is irradiated with X-rays, an X-ray fluoroscopic image of the printed material is captured, and the X-ray fluoroscopic image is obtained. There is provided a method of authenticating a printed material, which verifies the authenticity of the printed material.

上記発明においては特に限定されないが、前記印刷物は、透かし部が形成されていることが好ましい。   Although not particularly limited in the above invention, it is preferable that a watermark is formed on the printed matter.

本発明によれば、Ｘ線透過法を用いて印刷物のＸ線透視像を撮像することにより、当該印刷物の表裏両面に印刷された印刷部を同一のＸ線透視像に同時に撮像することが出来るので、印刷物の表面の印刷部と、当該印刷物の裏面の印刷部とを同時に真偽鑑定することが可能となり、正確且つ迅速な印刷物の真偽鑑定が可能となる。   According to the present invention, by capturing an X-ray fluoroscopic image of a printed material using the X-ray transmission method, it is possible to simultaneously capture the same printed X-ray fluoroscopic image on a printed portion printed on both the front and back surfaces of the printed material. Therefore, it is possible to simultaneously authenticate the printed portion on the front surface of the printed material and the printed portion on the back surface of the printed material, and it is possible to accurately and quickly authenticate the printed material.

また、印刷物の表裏両面の印刷部が同一のＸ線透視像に撮像されることにより、当該表裏面の印刷部同士の相対的位置関係をも鑑定要素に加えることが出来るので、より正確な印刷物の真偽鑑定を行うことが可能となる。   In addition, since the printed parts on both the front and back sides of the printed material are imaged in the same X-ray fluoroscopic image, the relative positional relationship between the printed parts on the front and back surfaces can be added to the appraisal element. It is possible to perform a true / false test.

さらに、印刷物に透かし部が形成されている場合には、Ｘ線透過法により、表裏両面の印刷部に加えて当該透かし部をも同一のＸ線透視像に撮像することが可能になると共に、当該透かし部と表裏両面の印刷部との相対的位置関係をも鑑定要素に加えることが出来るので、印刷物のより正確且つ迅速な真偽鑑定を行うことが可能となる。   Furthermore, in the case where a watermark is formed on the printed material, it becomes possible to capture the same watermark in the same X-ray fluoroscopic image in addition to the front and back printing parts by the X-ray transmission method, Since the relative positional relationship between the watermark portion and the printing portions on both the front and back sides can also be added to the appraisal element, it is possible to perform a more accurate and quick authenticity assessment of the printed matter.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は本発明の実施形態に係る真偽鑑定方法に用いられるＸ線検査装置の全体システムの概略構成図、図２（Ａ）は本発明の実施形態に係る真偽鑑定方法の被検物である千円紙幣の全体図、図２（Ｂ）は図２（Ａ）のIIB部の要部Ｘ線透視像（写真）、図２（Ｃ）は図２（Ａ）のIIC部の要部Ｘ線透視像（写真）、図３は本発明の実施形態に係る真偽鑑定方法に用いられるテンプレートであり、図３（Ａ）は図２（Ｂ）に相当する部分、図３（Ｂ）は図２（Ｃ）に相当する部分である。なお、本実施形態では、図２（Ａ）に示されている面を紙幣１０の表面と称し、その反対側の面を紙幣１０の裏面と称する。   FIG. 1 is a schematic configuration diagram of an entire system of an X-ray inspection apparatus used for a true / false test method according to an embodiment of the present invention, and FIG. 2 (A) is a test object of the true / false test method according to the embodiment of the present invention. 2B is an X-ray fluoroscopic image (photograph) of the main part IIB of FIG. 2A, and FIG. 2C is a main part of the IIC part of FIG. 2A. Part X-ray fluoroscopic image (photograph), FIG. 3 is a template used in the authenticity evaluation method according to the embodiment of the present invention, FIG. 3A is a portion corresponding to FIG. 2B, FIG. ) Is a portion corresponding to FIG. In addition, in this embodiment, the surface shown by FIG. 2 (A) is called the surface of the banknote 10, and the surface on the opposite side is called the back surface of the banknote 10.

先ず、本発明の実施形態に係る真偽鑑定方法に用いられるＸ線検査装置１の全体構成について説明すると、図１に示すように、試料台３に載置された紙幣１０に対してＸ線を照射するＸ線発生器２と、紙幣１０をＸ線透視したＸ線透視像を撮像するＸ線検出器４と、当該撮像されたＸ線透視像に基づいて紙幣１０の真偽鑑定を行うコンピュータ５と、紙幣１０のＸ線透視画像等を表示するモニタ６と、を備えており、Ｘ線透過法を用いて、図２（Ａ）に示すような紙幣１０の真偽を鑑定することが可能となっている。   First, the overall configuration of the X-ray inspection apparatus 1 used in the authenticity evaluation method according to the embodiment of the present invention will be described. As shown in FIG. 1, the X-ray is applied to the banknote 10 placed on the sample table 3. The X-ray generator 2 that irradiates the X-ray, the X-ray detector 4 that X-rays the X-ray fluoroscopic image of the banknote 10, and the true / false judgment of the banknote 10 based on the X-ray fluoroscopic image taken. A computer 5 and a monitor 6 that displays an X-ray fluoroscopic image or the like of the banknote 10 are provided, and the authenticity of the banknote 10 as shown in FIG. 2A is identified using the X-ray transmission method. Is possible.

以下に、このＸ線検査装置１の詳細な構成と共に、本発明の実施形態に係る真偽鑑定方法について説明する。   Below, the authenticity determination method which concerns on embodiment of this invention with the detailed structure of this X-ray inspection apparatus 1 is demonstrated.

本実施形態に係る真偽鑑定方法では、Ｘ線検査装置１の試料台３の上の所定の位置に被検物である紙幣１０を載置した後に、先ず、Ｘ線発生器２に管電圧０．１〜３０ｋＶを印加してＸ線を発生させ、当該Ｘ線を紙幣１０に対して照射する。このＸ線発生器２により発生されるＸ線としては、０．１〜２ｋｅＶ程度の軟Ｘ線が好ましい。当該Ｘ線発生器２のＸ線管焦点寸法としては、マイクロ・フォーカス（μｍ）やナノ・フォーカス（ｎｍ）級の超高解像度用のものは必要なく、０．１〜１．０ｍｍ程度のミリ・フォーカス級が具備されていれば足りる。   In the authenticity assessment method according to the present embodiment, after placing the bill 10 as the test object at a predetermined position on the sample table 3 of the X-ray inspection apparatus 1, first, the tube voltage is applied to the X-ray generator 2. 0.1-30 kV is applied to generate X-rays, and the banknotes 10 are irradiated with the X-rays. The X-ray generated by the X-ray generator 2 is preferably a soft X-ray of about 0.1 to 2 keV. As the X-ray tube focal size of the X-ray generator 2, a micro-focus (μm) or nano-focus (nm) class ultra-high resolution is not necessary, and a millimeter of about 0.1 to 1.0 mm.・ A focus class is sufficient.

本実施形態に係る真偽鑑定方法では、このようなエネルギーが低く透過性の弱い軟Ｘ線を照射することにより、紙幣のような紙等に印刷された極めて薄い磁性インキ印刷部のＸ線透視像を鮮明に撮像することが可能となっている。   In the authenticity verification method according to the present embodiment, X-ray fluoroscopy of an extremely thin magnetic ink printing part printed on paper such as banknotes by irradiating soft X-rays having such low energy and low permeability. It is possible to capture an image clearly.

これに対し、例えば、２〜２０ｋｅＶ程度の典型的なＸ線を照射した場合には、Ｘ線が薄い磁性インキ印刷部をも透過してしまい、真偽鑑定に際して十分に鮮明なＸ線透視像を撮像することが出来ない。   On the other hand, for example, when a typical X-ray of about 2 to 20 keV is irradiated, the X-ray passes through a thin magnetic ink printing portion, and a sufficiently clear X-ray fluoroscopic image for authenticity determination. Cannot be imaged.

また、特に図示しないが、本実施形態でＸ線検査装置１では、Ｘ線発生器２と、紙幣１０を載置する試料台３との間に、例えば、厚さ０．２ｍｍ程度のアルミニウム箔を介在させて、Ｘ線発生器２から照射されるＸ線に対してフィルタリングを行い、連続Ｘ線スペクトルの中でも物質透過能力の比較的強い短波長成分の照射を抑制し、薄い磁性インキ印刷部のより鮮明なＸ線透視像を撮像可能にしている。   Although not particularly illustrated, in the X-ray inspection apparatus 1 in this embodiment, for example, an aluminum foil having a thickness of about 0.2 mm is provided between the X-ray generator 2 and the sample table 3 on which the banknote 10 is placed. Is used to filter the X-rays emitted from the X-ray generator 2 to suppress irradiation of short wavelength components having a relatively strong substance transmission ability in the continuous X-ray spectrum, and a thin magnetic ink printing part Therefore, a clearer X-ray fluoroscopic image can be taken.

次に、上記のようにＸ線発生器２から照射されたＸ線が、試料台３上に載置された紙幣１０を透過し、そのＸ線透視像をＸ線検出器４が検出して、紙幣１０のＸ線透視像を撮像する。   Next, the X-rays irradiated from the X-ray generator 2 pass through the banknote 10 placed on the sample table 3 as described above, and the X-ray fluoroscopic image is detected by the X-ray detector 4. An X-ray fluoroscopic image of the banknote 10 is taken.

本実施形態で用いられるＸ線検査装置１のＸ線検出器４は、例えば、沃化セシウム（ＣｓＩ）やカドミウム・テルライド（ＣｄＴｅ）等のＸ線を可視光に変換するシンチレータの下に、ＭＯＳやフォトダイオード等の光電変換素子を二次元に多数配列させたフラットパネルＸ線センサであり、１２ｂｉｔｓ（４０９６階調）の高い階調表現力（ダイナミック・レンジ）でデジタルＸ線透視画像を撮像することが可能となっている。   The X-ray detector 4 of the X-ray inspection apparatus 1 used in the present embodiment includes, for example, a MOS under a scintillator that converts X-rays such as cesium iodide (CsI) and cadmium telluride (CdTe) into visible light. A flat panel X-ray sensor in which a large number of photoelectric conversion elements such as photodiodes and photodiodes are two-dimensionally arranged, and takes a digital X-ray fluoroscopic image with a high gradation expression (dynamic range) of 12 bits (4096 gradations). It is possible.

本実施形態に係る真偽鑑定方法では、紙幣のような薄い紙等を撮像するため、エネルギーの絶対値が低いＸ線を検出する必要がある上に、さらに、紙幣１０のインキ印刷部や透かし部のＸ線吸収により生じた透過Ｘ線の微弱な差異をも検出する必要があるが、上記のようなフラットパネルＸ線センサをＸ線検出器４として用いることにより、当該フラットパネルＸ線センサの細かな階調特性により、低エネルギーの透過Ｘ線における微弱な差異をも精度良く検出することが可能となっている。   In the authenticity assessment method according to the present embodiment, since thin paper or the like such as a banknote is imaged, it is necessary to detect X-rays having a low absolute value of energy, and further, an ink printing unit and a watermark of the banknote 10 are detected. Although it is necessary to detect even a slight difference in transmitted X-rays generated by X-ray absorption of the portion, by using the flat panel X-ray sensor as described above as the X-ray detector 4, the flat panel X-ray sensor Due to the fine gradation characteristics, it is possible to accurately detect even a slight difference in low-energy transmitted X-rays.

因みに、従来から利用されているＸ線Ｉ．Ｉ．管（Ｘ線イメージインテンシファイア）を用いた場合には、８ｂｉｔｓ（２５６階調）程度の低階調のアナログＸ線透視画像しか得られないため、紙幣１０のＸ線透視画像において生じた微弱な差異を十分に検出することが出来ず、本実施形態に係る真偽鑑定方法に適用可能なＸ線透視画像を撮像することが出来ない。   Incidentally, X-ray I.D. I. When a tube (X-ray image intensifier) is used, only an analog X-ray fluoroscopic image having a low gradation of about 8 bits (256 gradations) can be obtained. Such a difference cannot be detected sufficiently, and an X-ray fluoroscopic image applicable to the authenticity evaluation method according to the present embodiment cannot be captured.

本実施形態に係る真偽鑑定方法に用いられるＸ線検査装置１では、これらＸ線発生器２、試料台３、及び、Ｘ線検出器４が、被検物１０のＸ線透視像の幾何学的拡大率Ｍが１０倍程度になるように配置されている。この幾何学的拡大率は、図１に示すように、Ｘ線発生器２からＸ線検出器４の検出面までのＦＤＤ距離と、Ｘ線発生器２から被検物１０までのＦＯＤ距離の比により規定される（Ｍ＝ＦＤＤ／ＦＯＤ）。   In the X-ray inspection apparatus 1 used for the authenticity assessment method according to the present embodiment, the X-ray generator 2, the sample stage 3, and the X-ray detector 4 are arranged in the geometry of the X-ray fluoroscopic image of the test object 10. It arrange | positions so that the scientific expansion rate M may become about 10 times. As shown in FIG. 1, this geometric enlargement ratio is obtained by calculating the FDD distance from the X-ray generator 2 to the detection surface of the X-ray detector 4 and the FOD distance from the X-ray generator 2 to the test object 10. It is defined by the ratio (M = FDD / FOD).

このようなＸ線検出器４により紙幣１０が撮像されると、同一のＸ線透視像に当該紙幣１０の表面印刷部１１、裏面印刷部１２、及び、透かし部１３が同時に撮像される。   When the banknote 10 is imaged by such an X-ray detector 4, the front surface printing unit 11, the back surface printing unit 12, and the watermark unit 13 of the banknote 10 are simultaneously imaged on the same X-ray fluoroscopic image.

より具体的に、Ｘ線検出器４により撮像された紙幣１０のＸ線透視像を部分的に説明すると、例えば、図２（Ａ）の紙幣１０のIIB部については、図２（Ｂ）に示すように、紙幣１０の表面に磁性インキ（金属成分含有インキ）により印刷された「千円」及び「日本銀行」の文字等の表面印刷部１１と、当該紙幣１０の裏面に磁性インキにより印刷された丹頂鶴の図形等の裏面印刷部１２とが、同一のＸ線透視像に同時に撮像される。なお、図２（Ｂ）は、Ｘ線を紙幣１０の裏面から照射した場合のＸ線透視像である。   More specifically, when the X-ray fluoroscopic image of the banknote 10 imaged by the X-ray detector 4 is partially described, for example, the IIB portion of the banknote 10 in FIG. 2A is shown in FIG. As shown in the drawing, the surface of the banknote 10 is printed with magnetic ink (metal component-containing ink), such as “1000 yen” and “Bank of Japan” characters, etc., and the back of the banknote 10 is printed with magnetic ink. The back print portion 12 such as the figure of the crane with the red-crowned crane is simultaneously captured on the same X-ray fluoroscopic image. Note that FIG. 2B is an X-ray fluoroscopic image when X-rays are irradiated from the back surface of the banknote 10.

また、例えば、Ｘ線を紙幣１０の表面から照射した場合に、図２（Ａ）の紙幣１０のIIC部については、図２（Ｃ）に示すように、紙幣１０の表面に磁性インキにより印刷された模様等の表面印刷部１１、及び、当該紙幣１０の裏面に磁性インキにより印刷された丹頂鶴の図形等の裏面印刷部１２に加えて、当該紙幣１０の略中央部にすき入れされた文豪夏目漱石の肖像画の透かし部１３が、同一のＸ線透視像に同時に撮像される。   Further, for example, when X-rays are irradiated from the surface of the banknote 10, the IIC portion of the banknote 10 in FIG. 2A is printed with magnetic ink on the surface of the banknote 10 as shown in FIG. In addition to the surface printing part 11 such as the printed pattern and the back surface printing part 12 such as the figure of a crane crane printed on the back side of the banknote 10 with magnetic ink, the bungo squeezed into the substantially central part of the banknote 10 A watermark 13 of Natsume Soseki's portrait is simultaneously captured on the same fluoroscopic image.

なお、図２（Ｂ）及び図２（Ｃ）は、Ｘ線検出器４により撮像された紙幣１０のＸ線透視像の一部しか示していないが、本実施形態に係る真偽鑑定方法では、Ｘ線発生器２により紙幣１０全体に対して軟Ｘ線を照射し、Ｘ線検出器４により当該紙幣１０全体のＸ線透視像を撮像する。   2 (B) and 2 (C) show only a part of the X-ray fluoroscopic image of the banknote 10 imaged by the X-ray detector 4, but in the authenticity determination method according to the present embodiment. The X-ray generator 2 irradiates the entire banknote 10 with soft X-rays, and the X-ray detector 4 captures an X-ray fluoroscopic image of the entire banknote 10.

このように、本実施形態に係る真偽鑑定方法では、Ｘ線透過法を用いて紙幣のＸ線透視像を撮像することにより、当該紙幣の表裏両面に印刷された磁性インキ印刷部と、当該紙幣に形成された透かし部と、を同一のＸ線透視像に同時に撮像することが出来るので、紙幣の表面の印刷部、裏面の印刷部、及び、透かし部を同時に真偽鑑定することが可能となり、正確且つ迅速な紙幣の真偽鑑定が可能となる。   Thus, in the true / false judgment method according to the present embodiment, the X-ray transmission method is used to capture an X-ray fluoroscopic image of the banknote, thereby printing the magnetic ink printing unit printed on both front and back sides of the banknote, Since the watermark part formed on the banknote can be simultaneously captured on the same X-ray fluoroscopic image, it is possible to simultaneously authenticate the printing part on the front side of the banknote, the printing part on the back side, and the watermark part. Thus, it is possible to accurately and quickly authenticate banknotes.

次に、コンピュータ５がＸ線検出器４により撮像された紙幣１０のＸ線透視像に基づいて、当該紙幣１０の真偽鑑定を行う。   Next, the computer 5 verifies the authenticity of the banknote 10 based on the X-ray fluoroscopic image of the banknote 10 captured by the X-ray detector 4.

本実施形態に係る真偽鑑定方法に用いられるコンピュータ５には、図３（Ａ）及び図３（Ｂ）に示すような、紙幣１０のＸ線透視像に対してパターンマッチング処理を行うためのテンプレート２０が予め記憶されており、Ｘ線検出器４により撮像されたＸ線透視像に対して当該各テンプレート２０を用いてパターンマッチング処理を行い、紙幣１０の真偽鑑定を行う。   The computer 5 used in the authenticity evaluation method according to the present embodiment is for performing pattern matching processing on the X-ray fluoroscopic image of the banknote 10 as shown in FIGS. 3 (A) and 3 (B). A template 20 is stored in advance, and a pattern matching process is performed on the X-ray fluoroscopic image captured by the X-ray detector 4 using each template 20 to authenticate the banknote 10.

このコンピュータ５に予め記憶されたテンプレート２０は、真券千円紙幣の表面印刷部、裏面印刷部及び透かし部の輪郭線が一体で形成されていると共に、当該表面印刷部、裏面印刷部及び透かし部の相対的位置関係が規定されている。   The template 20 stored in advance in the computer 5 has the contour lines of the front surface printing portion, the back surface printing portion, and the watermark portion of the genuine bill thousand yen bill integrally formed, and the front surface printing portion, the back surface printing portion, and the watermark. The relative positional relationship of the parts is defined.

より具体的に、このテンプレート２０について部分的に説明すると、図３（Ａ）は、図２（Ｂ）に示す紙幣１０のIIB部に対応する当該テンプレート２０の部分であり、真券千円紙幣の表面に印刷された「千円」及び「日本銀行」の文字等の表面印刷部に対応する表面図形２１と、当該真券紙幣の裏面に印刷された丹頂鶴の図形などの裏面印刷部に対応する裏面図形２２とが一体で形成されていると共に、当該テンプレート２０において、表面図形２１と裏面図形２２との相対的位置関係が規定されている。   More specifically, the template 20 will be described in part. FIG. 3A is a portion of the template 20 corresponding to the IIB portion of the banknote 10 shown in FIG. Corresponds to the surface graphic 21 corresponding to the surface printing part such as "1000 yen" and "Bank of Japan" characters printed on the surface of the paper, and the back surface printing part such as the figure of a crane crane printed on the back surface of the bill The back surface graphic 22 is integrally formed, and the template 20 defines the relative positional relationship between the front surface graphic 21 and the back surface graphic 22.

また、図３（Ｂ）は、図２（Ｃ）に示す紙幣１０のIIC部に対応するテンプレート２０の部分であり、真券千円紙幣の表面に印刷された模様等の表面印刷部に対応する表面図形２１、及び、当該真券紙幣の裏面に印刷された丹頂鶴の図形等の裏面印刷部に対応する裏面図形２２に加えて、当該真券紙幣の略中央部にすき入れされた文豪夏目漱石の肖像画の透かし部に対応する透かし図形２３とが一体で形成されていると共に、当該テンプレート２０において、表面図形２１、裏面図形２２及び透かし図形２３との相対的位置関係が規定されている。   FIG. 3B is a portion of the template 20 corresponding to the IIC portion of the banknote 10 shown in FIG. 2C, and corresponds to a surface printing portion such as a pattern printed on the surface of a genuine 1000-yen banknote. Bungo Natsume, which has been inserted into the substantially central portion of the genuine note banknote, in addition to the backside graphic 22 corresponding to the back surface printed portion such as the figure of the crane crane printed on the back surface of the genuine note banknote, etc. A watermark graphic 23 corresponding to the watermark portion of the meteorite portrait is integrally formed, and in the template 20, the relative positional relationship between the front graphic 21, the back graphic 22 and the watermark graphic 23 is defined.

なお、図３（Ａ）及び図３（Ｂ）は、コンピュータ５に予め記憶されたテンプレート２０の一部しか示していないが、本実施形態に係る真偽鑑定方法では、真券千円紙幣全体の表面印刷部、裏面印刷部及び透かし部の輪郭線が一体で形成されている。   3 (A) and 3 (B) show only a part of the template 20 stored in advance in the computer 5, but in the authenticity assessment method according to the present embodiment, the entire genuine thousand yen bill The contour lines of the front surface printing portion, the back surface printing portion, and the watermark portion are integrally formed.

本実施形態で用いられるＸ線検査装置１のコンピュータ５による具体的な鑑定方法としては、上述のようにＸ線検出器４により撮像されたＸ線透視像に対して、テンプレート２０を照合させてマッチング処理を行い、紙幣１０のＸ線透視像が、テンプレート２０に一致した場合には、当該紙幣１０は真券と鑑定される。これに対して、紙幣１０のＸ線透視像の一部でもテンプレート２０と一致しない場合には、当該紙幣１０は偽造紙幣と鑑定される。   As a specific appraisal method by the computer 5 of the X-ray inspection apparatus 1 used in the present embodiment, the template 20 is collated against the X-ray fluoroscopic image captured by the X-ray detector 4 as described above. When the matching process is performed and the X-ray fluoroscopic image of the banknote 10 matches the template 20, the banknote 10 is identified as a genuine note. On the other hand, if even part of the X-ray fluoroscopic image of the banknote 10 does not match the template 20, the banknote 10 is identified as a counterfeit banknote.

次に、このコンピュータ５による紙幣１０の鑑定結果と共に、紙幣１０のＸ線透視画像がモニタ６に表示される。この際、コンピュータ５により紙幣１０が偽造紙幣と鑑定された場合には、当該モニタ６に表示されるＸ線透視画像に、テンプレート２０との不一致箇所をマーキングして表示しても良い。また、当該モニタ５にＸ線透視画像に対してテンプレートを重畳させて表示し、当該Ｘ線透視画像とテンプレートとの一致性に基づいて鑑定者が目視により紙幣１０の真偽鑑定を行っても良い。   Next, an X-ray fluoroscopic image of the banknote 10 is displayed on the monitor 6 together with the result of appraisal of the banknote 10 by the computer 5. At this time, when the banknote 10 is identified as a counterfeit banknote by the computer 5, an unmatched portion with the template 20 may be marked and displayed on the X-ray fluoroscopic image displayed on the monitor 6. Further, even if the template is superimposed on the X-ray fluoroscopic image and displayed on the monitor 5 and the appraiser visually verifies the banknote 10 based on the coincidence between the X-ray fluoroscopic image and the template. good.

このように、本実施形態に係る真偽鑑定方法では、Ｘ線透過法を用いて、紙幣の表裏両面の磁性インキ印刷物及び透かし部が同一のＸ線透視像に撮像されると共に、真券紙幣の表裏面のインキ印刷部及び透かし部に対応する図形が一体で形成されたテンプレートを用いることにより、当該表裏面のインキ印刷部同士の相対的位置関係や表裏面の磁性インキ印刷部と透かし部との相対的位置関係をも鑑定要素に加えることが出来るので、より正確な紙幣の真偽鑑定を行うことが可能となる。   As described above, in the authenticity verification method according to the present embodiment, the magnetic ink printed matter and the watermark portion on both the front and back sides of the bill are imaged in the same X-ray fluoroscopic image using the X-ray transmission method, and the genuine note bill. By using a template in which graphics corresponding to the ink printing part and the watermark part on the front and back surfaces are integrally formed, the relative positional relationship between the ink printing parts on the front and back surfaces and the magnetic ink printing part and the watermark part on the front and back surfaces Can also be added to the appraisal element, so that it is possible to perform a more accurate bill appraisal.

なお、以上説明した実施形態は、本発明の理解を容易にするために記載されたものであって、本発明を限定するために記載されたものではない。したがって、上記の実施形態に開示された各要素は、本発明の技術的範囲に属する全ての設計変更や均等物をも含む趣旨である。   The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

上述の実施形態では、紙幣を鑑定対象として説明したが、本発明に係る真偽鑑定方法では特にこれに限定されず、紙幣の他に、例えば、商品券若しくはチケット等の金券類、又は、国債証券、地方債証券、出資証券、株券若しくはトラベラーズチェック等の有価証券等の、所定の文字や図形等が所定の位置にインキで印刷されたり、所定の位置にすき入れ技法等により所定の図形等の透かし部が形成された印刷物を鑑定対象とすることが出来る。   In the above-described embodiment, the bill has been described as an object of appraisal. However, the true / false appraisal method according to the present invention is not particularly limited to this. For example, in addition to the bill, cash vouchers such as gift certificates or tickets, or government bonds Securities, municipal bonds, investment securities, securities such as stock certificates or traveler's checks, etc. The printed material on which the watermark portion is formed can be the subject of the appraisal.

また、上述の実施形態に係る真偽鑑定方法では、被検体を日本国千円紙幣とした場合について説明したが、本発明においては特にこれに限定されず、例えば、日本国の二千円、五千円、一万円紙幣を被検体としても良く、或いは、紙製やプラスティック製の外国紙幣を被検体としても良い。   Further, in the authenticity evaluation method according to the above-described embodiment, the case where the subject is a Japanese yen bill is described. However, the present invention is not particularly limited thereto. Five thousand yen and ten thousand yen banknotes may be the subject, or paper or plastic foreign banknotes may be the subject.

さらに、上述の実施形態では、紙幣全体を撮像したＸ線透視像に基づいて紙幣の真偽鑑定を行うように説明したが、本発明においては特にこれに限定されず、紙幣の真偽鑑定要素と成り得る紙幣の要部を任意に設定し、当該要部のみのＸ線透視像に基づいて真偽鑑定を行っても良く、これにより、効率的に紙幣の真偽鑑定を行うことが可能となる。   Furthermore, in the above-described embodiment, it has been described that the authenticity of the banknote is performed based on the X-ray fluoroscopic image obtained by imaging the entire banknote. However, in the present invention, the present invention is not particularly limited thereto. It is possible to arbitrarily set the principal part of the banknote that can be and to perform authenticity evaluation based on the X-ray fluoroscopic image of only the relevant part. It becomes.

また、上述の実施形態では、真券紙幣の表裏面の印刷部及び透かし部の輪郭線に対して照合可能なようなテンプレートを用いるように説明したが、本発明においては特にこれに限定されず、真偽鑑定に用いられるテンプレートに、真券紙幣の表裏面の印刷部及び透かし部が有する模様等に対応する模様等を形成しても良く、これにより、さらに正確な真偽鑑定を達成することが可能となる。   Moreover, in the above-mentioned embodiment, although demonstrated so that the template which can be collated with respect to the outline of the printing part and watermark part of the front and back of a genuine note banknote was used, in this invention, it is not limited to this in particular. The template used for authenticity determination may be formed with a pattern corresponding to the pattern or the like of the printed part and the watermark part on the front and back sides of the genuine note banknote, thereby achieving more accurate authenticity determination. It becomes possible.

図１は、本発明の実施形態に係る真偽鑑定方法に用いられるＸ線検査装置の全体システムの概略構成図である。FIG. 1 is a schematic configuration diagram of an entire system of an X-ray inspection apparatus used in a true / false judgment method according to an embodiment of the present invention. 図２（Ａ）は、本発明の実施形態に係る真偽鑑定方法の被検物である千円紙幣の全体図であり、図２（Ｂ）は、図２（Ａ）のIIB部の要部Ｘ線透視像（写真）であり、図２（Ｃ）は、図２（Ａ）のIIC部の要部Ｘ線透視像（写真）である。FIG. 2 (A) is an overall view of a thousand-yen banknote that is a test object of the authenticity evaluation method according to the embodiment of the present invention, and FIG. 2 (B) is an essential part of the IIB portion of FIG. 2 (A). FIG. 2C is a partial X-ray fluoroscopic image (photograph), and FIG. 2C is a main X-ray fluoroscopic image (photograph) of the IIC portion in FIG. 図３は、本発明の実施形態に係る真偽鑑定方法に用いられるテンプレートであり、図３（Ａ）は、図２（Ｂ）に相当する部分であり、図３（Ｂ）は、図２（Ｃ）に相当する部分である。FIG. 3 is a template used for the authenticity evaluation method according to the embodiment of the present invention, FIG. 3A is a portion corresponding to FIG. 2B, and FIG. This is a part corresponding to (C).

符号の説明Explanation of symbols

１…Ｘ線検査装置
２…Ｘ線発生器
３…試料台
４…Ｘ線検出器
５…コンピュータ
６…モニタ
１０…紙幣
１１…表面印刷部
１２…裏面印刷部
１３…透かし部
２０…テンプレート
２１…表面図形
２２…裏面図形
２３…透かし図形 DESCRIPTION OF SYMBOLS 1 ... X-ray inspection apparatus 2 ... X-ray generator 3 ... Sample stand 4 ... X-ray detector 5 ... Computer 6 ... Monitor 10 ... Banknote 11 ... Front surface printing part 12 ... Back surface printing part 13 ... Watermark part 20 ... Template 21 ... Front figure 22 ... Back figure 23 ... Watermark figure

Claims (2)

表面及び／又は裏面が印刷された印刷物に対してＸ線を照射して、前記印刷物のＸ線透視像を撮像し、前記Ｘ線透視像に基づいて前記印刷物の真偽を鑑定する印刷物の真偽鑑定方法。   The printed material on which the front surface and / or the back surface is printed is irradiated with X-rays, an X-ray fluoroscopic image of the printed material is captured, and the authenticity of the printed material is determined based on the X-ray fluoroscopic image. Fake appraisal method. 前記印刷物は、透かし部が形成されている請求項１記載の印刷物の真偽鑑定方法。   The method of authenticating a printed material according to claim 1, wherein the printed material has a watermark portion.
JP2003318873A 2003-09-10 2003-09-10 Authenticity examination method for printed matter Pending JP2005085163A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008149050A1 (en) * 2007-06-06 2008-12-11 De La Rue International Limited Apparatus for analysing a security document
CN101826230A (en) * 2010-05-05 2010-09-08 杨承然 X-ray bank note caba detecting and counting system
JP2011199441A (en) * 2010-03-18 2011-10-06 Ricoh Co Ltd Image processing device, program, and recording medium
US8472676B2 (en) 2007-06-06 2013-06-25 De La Rue International Limited Apparatus and method for analysing a security document

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008149050A1 (en) * 2007-06-06 2008-12-11 De La Rue International Limited Apparatus for analysing a security document
US8464875B2 (en) 2007-06-06 2013-06-18 De La Rue International Limited Apparatus for analysing a security document
US8472676B2 (en) 2007-06-06 2013-06-25 De La Rue International Limited Apparatus and method for analysing a security document
JP2011199441A (en) * 2010-03-18 2011-10-06 Ricoh Co Ltd Image processing device, program, and recording medium
CN101826230A (en) * 2010-05-05 2010-09-08 杨承然 X-ray bank note caba detecting and counting system

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