JP2693570B2 - Anti-counterfeiting and detection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention is effective in preventing counterfeiting of banknotes, securities, stamps, etc., and for detecting counterfeit goods. Regarding

(Prior Art) In order to prevent forgery of banknotes and securities, there is a method of providing a watermark on a printed matter or providing a special printed pattern that can be detected by an eye or a microscope. There are also foreign currency bills that are printed with fluorescent paint.

All of these conventional anti-counterfeit methods rely heavily on printing technology.

(Problems to be Solved by the Invention) According to the above-described conventional anti-counterfeiting methods, most of them rely on the printing technology, and most of them appear as patterns or patterns on the printed matter. In particular, an automatic vending machine and an automatic bill reading machine are designed to determine whether a product is a counterfeit product or a genuine product by reading a pattern printed and appearing as a pattern or a pattern.

However, in the case of a pattern clearly appearing as a picture or a pattern on a printed matter, it is easy to predict the pattern even when it is forged.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a forgery prevention and detection system for printed matter that is difficult to forge.

[Structure of the Invention] (Means for Solving the Problem) According to the present invention, print data for printing on a printed material is created by a print data creating means and stored in a storage means, and the print data creating means responds to the print data. In a system for inspecting the presence or absence of information contained in a printed matter by an inspection device, the print data creating means is provided with an image data obtaining means for obtaining image data and the image data obtaining means. An image conversion processing unit that performs pattern conversion processing on the obtained image data to obtain the above information, and a storage unit that stores the converted data from the image conversion processing unit as print data for a printed matter. .

(Operation) By the above means, it is difficult to understand what kind of conversion processing the print information of the printed matter has undergone, and it is not possible to capture the regularity even if the information is forged, which is effective in preventing forgery. As the inspection side, according to the predetermined rules,
By grasping the print content of the printed matter as image data and inversely converting it, it is possible to check whether it is a genuine article or a fake article.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In FIG.
An image medium 11 is printed as confidential information on a printed matter. The image data of this subject is acquired by, for example, the video camera 12A or the image scanner 12B.

The image data from the image data acquisition means is input to the image conversion processing device 14 of the image data processing processing device 13. The image conversion processing device 14 performs, for example, one-dimensional Fourier transform or two-dimensional Fourier transform processing on the input image data under the control of the microcomputer 15. Then, the converted image data (that is, the secret information converted into the frequency domain data) is stored in the print data memory 16. The print data memory 16 is used by the print data processing unit of the printing device 17.

As a result, the concealed image information is printed on the printed matter 21 obtained by the printing device 17.

In order to detect whether the printed matter 21 is a fake or a genuine article, the printed matter 21 is imaged by, for example, the video camera 22, and the print content is acquired as image data. The image data (including confidential information) acquired by the video camera 22 is input to the image conversion processing device 23 and subjected to one-dimensional or two-dimensional inverse Fourier transform processing according to a predetermined rule. Thereby, when the confidential information is included, the image conversion processing device 23 can reproduce the image information of the same pattern (image of the image medium 11) as the image acquired by the video camera 12A.

The image data of the image medium 11 thus reproduced is displayed on the monitor 24 and is monitored by human eyes. Alternatively, the image data from the image conversion processing device 23 is input to the checking device 25. The checking device 25 performs a comparison process between the image data from the image conversion processing device 23 and the image data of the pattern stored in advance, and determines whether or not the patterns match with a certain tolerance. I do. The judgment output is input to the message device 26. The message device 26 accepts the printed matter when a match determination signal is input, and issues a rejection warning or displays when a mismatch determination signal is input.

FIG. 2 shows an example of the internal configuration of the image conversion processing device 23.

The image signal from the video camera 22 is supplied to the input board 32 via the input terminal 31. The input board 32 performs analog-digital conversion processing of the image signal, and the obtained image data is stored in the input buffer memory.

The image data in the input buffer memory is sent to the processor board 33 through the high speed data bus. The processor board 33 performs one-dimensional Fourier transform or two-dimensional Fourier transform processing. In this case, the frame memory
Reference numeral 34 is used as a buffer for data being processed or for accumulating reference data for determination. The converted image data (unencrypted) is displayed on the monitor board 35.
Sent to memory. In the monitor board 35, digital-analog conversion processing is performed and the result is sent to the monitor via the image output terminal 36.

In addition, the control bus connected to the input board 32, the processor board 33, the frame memory 34, and the monitor board 35,
The interface 37 is also connected. A microcomputer is connected to the interface 37, and for example, switching control of the image processing mode can be performed.

In the above description, the circuit of FIG. 2 is the image conversion processing device.
Although described as 23, the functions of the image conversion processing device 14 can be provided by switching the software program of the processor board.

FIG. 3 shows a specific configuration example of the processor board 33. The processor board 33 includes a digital processor 331 connected to the data bus and the digital processor 3
The memory is controlled by 31, and is composed of a plurality of data buses 33a to 33c connected to a high-speed data bus. The digital processor 331 can control data in the data memory to perform data processing such as Fourier transform, rotation, and difference detection. The rotation difference detection is performed when the image is rotated 90 ° during the two-dimensional Fourier transform and the matching with the reference pattern is inspected.

In the above embodiment, when the image data is concealed, the component image data is one-dimensionally or two-dimensionally Fourier-transformed without paying particular attention to its component for Fourier transforming. However, not limited to this, only a specific component may be kept secret. For example, in image data,
Luminance components, R, G, B components are included, but any one of these is processed as confidential data, the remaining components and confidential information are printed on the printed matter, and only predetermined components are also checked when inspected. You may make it carry out a concealment cancellation process.

In addition, in the above embodiment, when the confidential information is created,
Although it has been described that the entire image data acquisition means is converted into secret information, the invention is not limited to this, and the acquired image data for one screen is divided into a plurality of parts (for example, four parts), and one of the divided parts is divided. Concealed information processing may be performed on the color information of the screen or the specific screen. Further, the concealment process may be selectively performed on the data of a plurality of split screens.

Further, in the above-mentioned embodiment, it is explained that the secret information is created by the Fourier transform, but the invention is not limited to this, and the image data is scrambled and created as print data, and the picked-up image is created on the inspection side. Data descramble processing may be performed.

According to the present invention described above, the information subjected to the fast Fourier transform processing is printed on the printed matter, but it is very difficult to forge the printed information (pattern or pattern) by a simple printing technique, and it is effective. Forgery prevention can be obtained.

[Effects of the Invention] As described above, according to the present invention, it is possible to obtain a forgery prevention and detection system for a printed matter that is difficult to forge.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention, FIG. 2 is a diagram showing a concrete example of the image conversion processing apparatus of FIG. 1, and FIG. 3 is a concrete example of the processor board of FIG. It is a figure. 12A, 22 ... Video camera, 14 ... Image conversion processing device, 1
5 …… Microcomputer, 16 …… Printing data memory, 17 …… Printing device, 23 …… Image conversion processing device, 24 ……
Monitor, 25 ... Check device, 26 ... Message device.

Claims (5)

(57) [Claims] 1. A print data creating means creates print data for printing on a printed matter and stores the print data in a storage means, the print material creating means includes information according to the print data in the print material, and the inspection device makes the print material. In the system for inspecting the presence / absence of information contained in, the print data creating unit includes an image data obtaining unit that obtains image data, and a pattern conversion process on the image data obtained from the image data obtaining unit to obtain confidential information. An anti-counterfeiting and detection system, comprising: an image conversion processing means to be obtained; and a storage means for storing the confidential information from the image conversion processing means as print data for a printed matter. 2. The inspection apparatus obtains secret information corresponding to the print data as image data from a printed matter, and performs a predetermined inverse pattern conversion process on the image data obtained by this means. The anti-counterfeiting and detecting system according to claim 1, further comprising: an inverse pattern converting means for obtaining image data corresponding to the secret information. 3. The forgery prevention and detection system according to claim 1, wherein the image conversion processing means performs Fourier transform processing on the image data obtained from the image acquisition means to obtain the confidential information. . 4. The image data acquisition means acquires image data including R, G, B color information, and the image conversion processing means Fourier transforms only one of the color information. The forgery prevention and detection system according to claim 1, wherein the confidential information is subjected to conversion processing. 5. The image data obtaining means obtains image data including R, G, B color information, and the image conversion processing means converts the image data into a plurality of divided data.
The anti-counterfeiting and detecting system according to claim 1, wherein any one of the color information of the divided image data is subjected to Fourier transform processing to obtain the secret information.