JP4004933B2 - Authenticity determination sheet, authenticity determination sheet authentication method and authenticity determination system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an authenticity determination sheet on which an authenticity determination target watermark is formed, and an authenticity determination method and an authenticity determination system for determining the authenticity of the sheet based on the formed watermark.
[0002]
[Prior art]
For example, a so-called watermark is generally formed to prevent forgery of tickets and labels. It is also known that the watermark is formed at the time of papermaking, formed by stamping with a mold roll, and further formed by half-cut which is difficult to see by laser processing. A technique for forming a watermark of a predetermined shape by such laser processing half-cut is known from the following patent documents.
[0003]
[Patent Document 1]
JP-A-9-95899 [Patent Document 2]
Japanese Patent Laid-Open No. 10-236000
Compared with the above-mentioned watermark formation by embossing, the shape is uniform unless the mold roll is changed. The merit that watermark formation by laser cutting can be easily changed by changing the processing data during laser processing. There is.
[0005]
[Problems to be solved by the invention]
However, it is possible to prevent forgery by a color printer, color copy, etc. by the presence of a watermark only by forming a watermark, but if the watermark is also forged by embossing etc., the authenticity is judged There is a problem that it is difficult.
[0006]
Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an authenticity determination sheet, an authenticity determination method, and an authenticity determination system that can reliably determine authenticity based on a formed watermark. And
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the invention of claim 1, in addition to the predetermined display information, there is provided a sheet for authenticity determination in which a watermark having a predetermined shape is formed by a non-penetrating half-cut that is difficult to see by laser irradiation. Based on the set shape of the watermark and the processing elements that constitute a part of the processing data relating to the laser irradiation for forming the set watermark, among the objects to be scraped by the half-cut by the laser irradiation, A watermark formed in the set shape by the laser irradiation in scanning at a predetermined interval in which a non-irradiated portion is set, and a predetermined processing element at the time of forming the watermark related to the laser irradiation in the watermark formation formed in the predetermined portion It is set as the structure which has a process specific code for specifying.
[0008]
According to a second aspect of the present invention, processing elements constituting a part of predetermined processing data relating to laser irradiation for watermark formation by the half cut in the authenticity determination sheet according to the first aspect are stored in a storage means, and an authenticity determination target A method for determining the authenticity of a watermark by identifying a watermark processing element formed on the sheet, and imaging at least the watermark and the processing specific code of the sheet for the authenticity determination target sheet And recognizing the processing specific code based on imaging data, recognizing the form of the watermark and specifying a predetermined processing element constituting a part of processing data related to laser irradiation for the watermark formation; Based on the recognized processing specific code, a corresponding processing element related to the preset laser irradiation at the time of watermark formation is determined in advance. A step of acquiring from the storage means, and a step of determining the authenticity of the sheet by comparing the predetermined processing element specified based on the imaging data with the processing element of the watermark formation acquired from the storage means. Including configuration.
[0009]
According to a third aspect of the present invention, there is provided an authenticity determination system for determining a predetermined authenticity of a processing element corresponding to a laser irradiation for watermark formation by the half-cut in the authenticity determination sheet according to the first aspect, Storage means for storing processing elements constituting a part of the predetermined processing data for watermark formation on the authenticity determination sheet, and imaging for capturing at least the watermark and the processing specific code for the authenticity determination target sheet And the processing specific code and the form of the watermark are identified based on the image data captured by the imaging means and the image processing means, the processing element is specified from the watermark form, and is specified from the recognized processing specific code. wherein the processing elements at the time of watermark formation which forms part of the processing data obtained from the storage unit, the laser irradiation of one another watermark formation A structure having a authenticity determining authenticity determination processing means of the sheet by matching processing between elements related.
[0010]
In this way, the watermark and the processing specific code for specifying the processing element at the time of forming the watermark when the watermark is formed on the authenticity determination sheet are formed, and the watermark and the processing specific code are at least obtained from the imaging data of the watermark and the processing specific code. Recognizing and specifying a processing element constituting a part of processing data related to laser irradiation at the time of formation from the watermark, and acquiring a processing element at the time of forming a watermark related to laser irradiation at the time of watermark formation from the recognized processing specific code, The authenticity is determined by collating the processing elements related to the laser irradiation. That is, since the formed watermark is collated based on the processing elements that constitute a part of the processing data at the time of forming the watermark related to laser irradiation, it is possible to reliably determine the authenticity of the formed watermark. It is.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration diagram of an authenticity determination system according to the present invention. In this embodiment, the authenticity determination sheet is described as, for example, a ticket. However, the present invention can also be applied to a sheet that forms a watermark such as a label, and further to a magnetic card or an IC card. In addition, the formed watermark can be applied to either a so-called black watermark or white watermark.
[0012]
In FIG. 1, an authenticity determination system 11 is used for authenticity determination in which a watermark formed by half-cut which is difficult to see by laser processing described later and an identification code (serial number and processing specific data) formed by printing or printing are formed. On the sheet 12 (which will be described in detail in FIG. 3), an imaging unit including an imaging camera 13 and an illuminating unit 14A (14B) for imaging is arranged. The authenticity determination processing means 15 performs the authenticity determination, and the authenticity determination processing means 15 is made accessible to a machining database (DB) 16 (described in detail in FIG. 2).
[0013]
As the imaging camera 13, for example, a commonly used CCD camera can be used. Further, although the illumination unit 14A is arranged on the surface facing the imaging camera 13 with respect to the authenticity determination sheet 12, the illumination unit 14B may be arranged on the same plane as the imaging camera 13 as indicated by a broken line in the drawing. Good. In other words, when the illumination unit 14A is disposed on the opposite surface of the authenticity determination sheet 12, the imaging camera 13 can capture images with a large amount of imaging light transmitted from the illumination unit 14A, and illuminates on the same surface. When the part 14B is arranged, it is possible to take an image by a shadow generated by the imaging light. The illumination unit 14A (14B) irradiates imaging light having a normal wavelength, and the normal wavelength means that generally used visible light is sufficient, and a specific wavelength is not particularly required. is there.
[0014]
The processing DB 16 stores watermark processing data to be formed on the target authenticity determination sheet 12, and when appropriate, when the target authenticity determination sheet 12 is formed with a different shape for each predetermined number of watermarks, Processing data for each correspondence is stored. One example is shown in FIG.
[0015]
The authenticity determination processing means 15 recognizes the processing specific code and the watermark form formed on the authenticity determination sheet 12 based on the image data captured by the imaging camera 13, and specifies the processing element from the watermark form. The processing element at the time of watermark formation specified by the recognized processing specific code is acquired from the storage means 16, and the processing elements related to the laser irradiation of each other's watermark formation are collated with each other. It is used for authenticity determination. Control means 21, bus 22, interface (IF) 23, imaging data acquisition means 24, identification code recognition means 25, watermark processing form recognition means 26, watermark processing information acquisition means 27, verification means 28 and display Means 29 is provided as appropriate.
[0016]
The control means 21 controls the system and stores a control program. The IF 23 inputs at least imaging data from the imaging camera 13 and inputs predetermined processing data (processing element) from the processing DB 16. The imaging data acquisition unit 24 temporarily stores imaging data from the imaging camera 13 and serves as a work area for collation processing by the collation unit 28. The identification code recognition means 25 recognizes at least a processing specific code (see FIG. 3) from the imaging data. The watermark processing information acquisition unit 27 acquires a predetermined processing element of the processing data specified by the processing specification code recognized by the identification code recognition unit 25 from the processing DB 16.
[0017]
The watermark processing form recognizing means 26 recognizes the watermark form from the imaged data and specifies the processing element for forming the watermark. Here, the processing elements include, for example, the scanning angle of laser irradiation, the presence or absence of contours of figures and characters, the interval (pitch) of laser irradiation (laser beam), the processing width of the laser beam, the type of watermark, and the like. The verification unit 28 determines the authenticity of the target authenticity determination sheet 12 by comparing the watermark forming processing element specified based on the image data and the predetermined processing element of the specified processing data. The display means 29 displays the collation result by the collation means 28.
[0018]
FIG. 2 is an explanatory view of the machining database in the authenticity determination system of FIG. 1, and FIG. 3 is an explanatory view of the authenticity determination sheet determined by the authenticity determination system of FIG. As shown in FIG. 2, the processing DB 16 stores processing data for each correspondence as a different shape for each predetermined number of sheets (here, the target sheet) at the time of watermark formation of the target authenticity determination sheet 12. Thus, for example, the machining data fill name corresponding to the machining ID as the machining identification code is associated, and a predetermined number of corresponding machining data fills are stored. Information for laser processing is created in advance in each processing data file.
[0019]
The processing data includes, for example, shape data and processing elements. For example, in “aaa.txt”, the processing elements correspond to the processing elements, and the laser irradiation scan angle is 45 degrees, “045”. “000” with or without contours of figures and characters, laser irradiation (laser beam) interval (pitch) “0.60 mm”, laser beam processing width “0.30 mm”, watermark type white watermark “000”, and other files are created in the same manner.
[0020]
As shown in FIG. 3, the authenticity determination sheet 12 is printed and printed with information peculiar to the sheet, and an identification code 33 composed of, for example, a serial number 31 and a processing ID 32 is printed and printed. This identification code 33 is used when printing and printing in a visible state with ordinary printing ink, or using invisible ink called so-called stealth ink that becomes visible when irradiated with ultraviolet rays. You can also. Further, this identification code 33 may also be formed by half-cutting by laser processing. Further, the identification code 33 may be displayed as a bar code or the like in addition to the case where the identification code 33 is composed of characters or the like.
[0021]
The authenticity determination sheet 12 is merely a ticket in the present embodiment, but may be a magnetic card or an IC card. A watermark 34 is formed on the surface, and a serial number or processing ID is used as an identification code. It may be stored as data.
[0022]
Further, a watermark 34 is formed at a predetermined position by a non-penetrating half cut that is difficult to see with a laser beam. Here, for example, a case is shown in which a laser irradiation is performed at a laser irradiation angle of 45 degrees, a laser processing width of 0.30 mm, an irradiation pitch of 0.60 mm, and the watermark 34 of the graphic character “TF” is formed by half-cutting. That is, the watermark 34 is difficult to view the half-cut portion because the surface and the inside of the authenticity determination sheet 12 are the same color. In FIG. 3, the half-cut state is shown in a visually visible state for easy explanation.
[0023]
Here, FIG. 4 shows a configuration diagram of a printing processing system for manufacturing the authenticity determination sheet shown in FIG. 3, and FIG. 5 shows an explanatory diagram of manufacturing the authenticity determination sheet by the printing processing system of FIG. 4A is a block diagram of the print processing system 41, and FIG. 4B is an explanatory diagram of the print DB. 4A, the printing processing system 41 includes a printing unit 42, a laser irradiation unit 43, a printing processing unit 44, a printing DB 46, and a processing DB 16A as appropriate.
[0024]
The printing means 42 prints (prints) information specific to the sheet on a target authenticity determination sheet at a predetermined position, and prints (prints) the identification code 33 (serial number 31 and processing ID 32) at a predetermined position. ) The laser irradiation means 43 forms the watermark 34 by irradiating the target authenticity determination sheet with an output laser beam that is half-cut at a predetermined position. The laser beam can be generated by a conventionally known oscillation means such as a CO ₂ laser, YAG laser, UV laser, or excimer laser. In FIG. 5, only the machining head is shown in FIG. 5, but the laser irradiation means 43 includes a laser light generation means and a scanning means (galvano method, XY plotter method, etc.) for controlling the irradiation position of the laser light. It is.
[0025]
The print DB 45 stores print data such as sheet-specific print information and information on the serial number 31 and the processing ID 32 that are the identification code 33. That is, as shown in FIG. 4B, for example, a print data fill name corresponding to the serial number 31 is associated, and a predetermined number of corresponding print data fills are stored. In each print data file, as described above, sheet-specific print information, information on the serial number 31 and the processing ID 32 that become the identification code 33, and the like are created in advance. The processing DB 16A stores the same information as the processing DB 16 shown in FIGS.
[0026]
The print processing means 44 includes a print control means 51, a bus 52, an IF 53, a print file creation means 54, a print drive control means 55, a laser processing data creation means 56, and a laser irradiation control means 57 as appropriate. The print control means 51 controls the system as a whole, and stores a program therefor. The IF 53 sends a drive control signal to the printing unit 42 and the laser irradiation unit 43, inputs print data read from the print DB 45, and inputs processing data read from the processing DB 16A. The print file creation means 54 reads print data of information to be printed (printed) on the target authenticity determination sheet from the print DB 45 and creates a print file for printing. The print file includes the processing ID as described above.
[0027]
The print drive control means 55 drives and controls the printing means 42, and sends print data by a corresponding method based on the print file created by the print file creation means 54. The laser processing data creating means 56 acquires the processing data from the processing DB 16A based on the processing ID included in the print data read from the print DB 45, and the watermark 34 is visually difficult to see on the target authenticity determination sheet by half cutting. Create a machining data file to form. The laser irradiation control means 57 controls driving of the laser irradiation means 43 based on the created processing data file.
[0028]
Therefore, as shown in FIG. 5, the target of printing (printing) and watermark formation is a continuous sheet 61, and marginal portions 61A and 61B corresponding to the conveying means are provided so as to be separable by a perforation line or the like. 62 is formed. Corresponding printing (printing) and watermark formation are respectively performed in the areas separated by the cutting lines 62, and after the formation, the sheets are cut by the cutting lines 62, thereby the authenticity determination sheet 12 as shown in FIG. It will be.
[0029]
That is, print data to be printed by the print file creation means 54 of the print processing processing means 44 is acquired from the print DB 45, a print file is created based on the print data, and sent to the print means 42 to determine the authenticity of the target of the continuous sheet 61. The print information specific to the sheet and the print information of the identification number 33 of the serial number 31 and the processing ID 32 are printed on a predetermined portion to be a sheet.
[0030]
On the other hand, in the laser processing data creation means 58, corresponding processing data is acquired from the processing DB 16A based on the processing ID 32, and laser processing data is created, and the laser irradiation control means 43 is based on the laser processing data. By controlling and driving, a watermark 34 that is difficult to see by half-cut is formed. In particular, since watermark formation by laser processing can change laser light irradiation on demand at any time, it is possible to form watermarks having different forms at any time, regardless of the formation of the same form. Note that the same applies to the case of forming a watermark on a sheet, regardless of the continuous sheet.
[0031]
6 shows a flowchart of the authenticity determination process in the authenticity determination sheet of FIG. 3 by the system of FIGS. 1 and 2, and FIG. 7 shows an explanatory diagram of the authenticity determination element of the authenticity determination sheet shown in FIG. In FIG. 6, first, the image data acquisition means 24 acquires image data of the authenticity determination sheet 12 imaged by the imaging camera 13 (step (S) 1). Based on the acquired imaging data, the identification code recognition means 25 identifies the identification code 33 and recognizes the processing ID 32, and the watermark processing form recognition means 26 recognizes the form of the watermark 34 and relates to laser irradiation in the watermark formation. A processing element is specified (S2).
[0032]
That is, the bitmap data of the watermark shown in FIG. 7A is specified from the imaging data, and the laser irradiation processing element is specified by the watermark 34. For example, as shown in FIG. 7B, it is specified that the watermark 34 is a white watermark without an outline, and the laser irradiation line 71 is a laser beam from a reference line (for example, the lower side line of the authenticity determination sheet 12). A scan angle of 45 degrees is specified, and a laser irradiation interval (pitch) of 0.60 mm and a laser processing width of 0.30 mm are specified.
[0033]
Subsequently, the watermark processing information acquisition unit 27 is used when the corresponding watermark as shown in FIG. 4 is formed from the processing DB 16 (16A) based on the processing ID 32 recognized by the identification code recognition unit 25. Processing data (particularly processing elements) as shown in FIG. 2 is acquired (S3). Therefore, the collating means 28 compares and collates the processing element of the watermark 34 specified from the image data of the authenticity determination sheet 12 with the processing element acquired from the processing DB 16 (S4). Then, the collation result is displayed on the display means 29 (S5).
[0034]
As described above, since the watermark 34 formed on the authenticity determination sheet 12 is collated based on the processing element at the time of formation, the authenticity of the formed watermark can be reliably determined. In particular, it is possible to easily and reliably perform authenticity determination when a different watermark is formed for each sheet in order to improve the forgery prevention effect.
[0035]
【The invention's effect】
As described above, the processing specific code for specifying the watermark and the processing element at the time of forming the watermark when the watermark is formed on the authenticity determination sheet is formed, and at least from the image data of the watermark and the processing specific code, the watermark and the processing specific code To identify the processing elements that constitute part of the processing data related to laser irradiation at the time of formation from the watermark, and acquire the processing elements at the time of watermark formation related to the laser irradiation at the time of watermark formation from the recognized processing specific code. The authenticity of the formed watermark can be reliably determined by performing authenticity determination by collating processing elements related to the laser irradiation.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an authenticity determination system according to the present invention.
FIG. 2 is an explanatory diagram of a machining database in the authentication system of FIG.
3 is an explanatory diagram of an authenticity determination sheet determined by the authenticity determination system of FIG. 1. FIG.
4 is a configuration diagram of a printing processing system for producing the authenticity determination sheet shown in FIG. 3. FIG.
FIG. 5 is an explanatory diagram for producing a sheet for authenticity determination by the printing processing system of FIG. 4;
6 is a flowchart of authentication determination processing in the authentication determination sheet of FIG. 3 by the system of FIGS. 1 and 2. FIG.
7 is an explanatory diagram of an authenticity determination element of the authenticity determination sheet shown in FIG.
[Explanation of symbols]
11 authenticity determination system 12 authenticity determination sheet 13 imaging camera 14 illumination means 15 authenticity determination processing means 16 processing database (DB)
25 recognition code recognition means 26 watermark processing form recognition means 27 watermark processing information acquisition means 28 collation means 29 display means 31 serial number 32 processing ID
33 Identification code 41 Printing processing system

Claims (3)

In addition to the predetermined display information, it is a sheet for authenticity determination in which a watermark of a predetermined shape is formed by a non-penetrating half cut that is difficult to see by laser irradiation,
Based on the set shape of the watermark and the processing elements constituting a part of the processing data relating to the laser irradiation for forming the set watermark, the non-cutting target of the half cut by the laser irradiation A watermark formed in the set shape by the laser irradiation in scanning at a predetermined interval in which an irradiation part is set;
A processing specifying code for specifying a predetermined processing element at the time of watermark formation related to the laser irradiation in the watermark formation formed in a predetermined portion;
A sheet for authenticity determination, comprising: 2. A watermark formed on a sheet for authenticity determination, wherein processing elements constituting a part of predetermined processing data relating to laser irradiation for watermark formation by half-cutting in the authenticity determination sheet according to claim 1 are stored in storage means. An authenticity determination method for determining the authenticity of the sheet by specifying the processing element of
Imaging at least the watermark and the processing specific code of the authenticity determination target sheet;
Recognizing the processing specific code based on imaging data, recognizing the form of the watermark and specifying a predetermined processing element constituting a part of the processing data relating to laser irradiation of the watermark formation;
Acquiring a corresponding processing element related to the preset laser irradiation at the time of watermark formation from the storage means based on the recognized processing specific code;
Determining the authenticity of the sheet by comparing the predetermined processing element identified based on the imaging data and the processing element of the watermark formation acquired from the storage unit;
The authenticity determination method characterized by including. An authenticity determination system for specifying a predetermined processing element related to laser irradiation for watermark formation by the half cut in the authenticity determination sheet according to claim 1 and determining the authenticity of the sheet,
Storage means for storing processing elements constituting a part of the predetermined processing data for watermark formation on the authenticity determination sheet;
Imaging means for imaging at least the watermark and the processing specific code for the authenticity determination target sheet;
Based on the imaging data imaged by the imaging means, the processing identification code and the form of the watermark are recognized, a processing element is specified from the watermark configuration, and the processing data specified by the recognized processing specification code Authenticity determination processing means for determining the authenticity of the sheet by acquiring the processing elements at the time of watermark formation constituting a part of the sheet from the storage means, and comparing the processing elements related to laser irradiation for mutual watermark formation;
An authenticity determination system characterized by comprising:

Images