JP3775698B2 - Information display medium, manufacturing method and usage thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to documents, are seemingly relate information displaying medium and methods of making and using thereof having awareness is a go over de as a code.
[0002]
[Prior art]
Conventionally, the following measures have been taken for documents that are inconvenient to be copied such as confidential documents and important documents.
First, when characters such as “invalid” and “copy” that are difficult to recognize visually are printed on a document and copied by a copying machine, these characters may appear.
Secondly, there are some which are printed in a color close to the color of the paper so that the characters are difficult to see when copied.
[0003]
Thirdly, there is a printer that prints an individual management number on a document so that the owner of the copied document can be specified. In this way, the copy itself is not prevented, but even when the copy is made, the copy source can be traced by the management number. Here, the management number is generally printed by a bar code or an OCR character.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional technique, in the first method, even if characters such as “invalid” are displayed when copying, the intention to suppress copying is immediately understood by the copied person. There is a problem that the characters are copied in such a way as to avoid the display of characters such as “invalid”.
In addition, the second method has a problem that copying can be performed with high accuracy as the copying performance of the copying machine has been improved in recent years, and copying can be performed by using such a copying machine. It was.
[0005]
Furthermore, in the third method, if the number is different compared to the management number of other documents, it becomes clear that the number is unique to the document, so the number is concealed or tampered with and copied. There was a problem that. In addition, displaying a barcode or OCR character on a document has a problem in terms of design.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide an information display medium having a code that can be easily merged in design without making the user visually aware of the management number, and a method for manufacturing and using the information display medium .
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 is an information display medium comprising a base material portion capable of displaying information by printing, printing, or handwriting, and a code image displayed on the base material portion. In the code image, only two or more replaced code images in a matrix form are displayed, and the replaced code image is a character image, a figure, a symbol, or a combination of these before replacement. Each pixel information in a predetermined matrix of the code image is replaced with a predetermined number of pixel information of 2 or more, and the pixel information before replacement and the pixel information after replacement are replaced so that the positions in the matrix correspond to each other. An information display medium comprising the predetermined number of images formed when the predetermined number of pieces of pixel information are arranged in the predetermined number of matrices.
[0009]
The invention according to claim 2 is the method for manufacturing the information display medium according to claim 1, wherein each pixel information in a predetermined matrix of a code image before replacement composed of characters, figures, symbols, or a combination thereof is randomly selected. Or the step of replacing each pixel information with a predetermined number of two or more based on a predetermined calculation, and the pixel information before replacement and the pixel information after replacement so that the positions in the matrix correspond to each other. A step of creating a replaced code image composed of the predetermined number of images by arranging a predetermined number of the pixel information in the predetermined number of matrices, and printing the replaced code image on the base material portion A process for manufacturing the information display medium .
[0010]
The invention of claim 3 is a method of using the information display medium according to claim 1, wherein each pixel information of the code image after replacement in the predetermined matrix of the predetermined number of displayed images is read. A step of reversely replacing the predetermined number of pieces of pixel information corresponding to positions in a matrix of the predetermined number of images of the code image after the replacement into one piece of pixel information based on a predetermined calculation; and the pixel information before replacement and forming the code image before the replacement by a position in the matrix of the pixel information after replacement arranging the pixel information before replacement to correspond to the matrix, the code from the pre-replacement of the code image Is a method for using the information display medium .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an embodiment of a cord according to the present invention. In the figure, (a) shows the number “0” as an example of the code image. This number is considered to be arranged on a matrix composed of a plurality of regions (30 in this embodiment). In this case, the pixel information in the lower left region (1, 1) in the figure is represented as f (1, 1), and the pixel information in each region is represented as “0” for white and “1” for black. Therefore, for example, f (1,1) = 0 and f (4,2) = 1.
Next, the pixel information in each of these areas is replaced with a plurality of pixel information. In this embodiment, a case where two pieces of pixel information are replaced is shown.
[0012]
FIG. 2 is a table showing pixel information of images before and after replacement. In the replacement, if the pixel information of the code image is “0”, the pixel information of the image 1 and the image 2 is different, that is, the pixel information of the image 1 and the image 2 is “0” and “1”, respectively. Or, replace with “1” and “0”. If the pixel information of the code image is “1”, the pixel information of the image 1 and the image 2 is the same, that is, the pixel information of the image 1 and the image 2 is “0” and “0”, respectively. Or “1” and “1”. Here, which one is substituted is arbitrary, and may be substituted randomly, or may be substituted based on a predetermined rule.
[0013]
Then, the pixel information of the image 1 is arranged in the matrix so that the pixel information of the code image and the pixel information of the image 1 correspond to each other in the matrix, and the image 1 is formed. Similarly, the image 2 is formed from the pixel information of the image 2.
In FIG. 1, the pixel information f (1,1) = 0 of the code image is replaced with the pixel information f1 (1,1) = 0 of the image 1 and the pixel information f2 (1,1) = 1 of the image 2. In this example, the pixel information f (4,2) = 1 of the code image is replaced with the pixel information f1 (4,2) = 0 of the image 1 and the code image f2 (4,2) = 0 of the image 2 Is shown.
[0014]
FIG. 3 is a diagram illustrating an embodiment of an information display medium provided with the formed image 1 and image 2. The information display medium 10 is made of a paper material, synthetic paper, a resin sheet, or the like. Then, the above-described image 1 and image 2 are printed as codes for specifying the information display medium 10. Examples of the information display medium 10 include those that are inconvenient to be copied such as secret documents and important documents. In this embodiment, the image 1 and the image 2 are arranged side by side, but may be provided at any position.
If a code is created and displayed on the information display medium 10 as described above, the code can be given without being conscious of the code (management number) unique to the information display medium 10. Further, there is a decorative effect on the design of the information display medium 10.
[0015]
Next, a method for reading a code from this image will be described.
FIG. 4 is a diagram for explaining an embodiment of a code reading method. The reading device 20 includes an optical sensor 21, a conversion device 22, a computer 23, and a display device 24 that are electrically connected to each other.
The optical sensor 21 reads two images displayed on the information display medium 10 by optical means. The two read images are transmitted to the conversion device 22. The conversion device 22 is for converting the information into specifications suitable for the input of the computer 23 electrically and logically. The information converted here is transmitted to the computer 23.
[0016]
The computer 23 converts the transmitted information into a first image based on a predetermined calculation. The computer 23 develops two images on the memory according to a predetermined processing program. Then, the presence / absence of a dot at a relative position from the image reference point is checked, and calculation is performed. The calculation here is a calculation for obtaining the pixel information of the code image from the pixel information of the image 1 and the image 2 in the table shown in FIG. That is, in each region of the matrix similar to FIG. 1, when the pixel information of the image 1 and the image 2 is the same, the pixel information of the code image is calculated as “1”, and the pixel information of the image 1 and the image 2 If they are different, the pixel information of the code image is calculated as “0”.
[0017]
Next, the pixel information after the calculation is arranged in the matrix so that the pixel information of the code image obtained by the calculation and the pixel information of the image 1 and the image 2 correspond in the matrix, thereby forming the code image To do. As a result, the code image of FIG. 1 is reconverted. Then, the calculation result is stored in the memory. Furthermore, the obtained image is recognized as a code. Further, this image is displayed by the display device 24.
[0018]
Thereby, if the code displayed by the display device 24 is viewed, it can be read visually.
When used as a management number at the time of manufacture, it is not displayed on the display device 24, and the alignment with other printed matter and the context of the document are confirmed according to the program.
As described above, when a copy of the information display medium 10 circulates, the owner of the copied document can be specified, and the copy source can be traced.
[0019]
Next, other embodiments (modifications) of the present invention include the following.
(1) The code is not limited to numbers, and various images can be used from characters, figures (including pictures and patterns), symbols, or combinations thereof.
(2) The matrix in which the code image is arranged may have any number of regions. However, in the case of copying, the image deteriorates and the reading accuracy is lowered. Therefore, it is preferable that one area is large.
[0020]
(3) The number of images after replacement of the card image is not limited to two, and may be three or more. When the number of images after replacement is three or more, an arithmetic expression is appropriately determined, and an image is generated in accordance therewith. If the number of images after replacement is increased, it becomes more difficult to decode the code, but the accuracy of the image needs to be kept higher.
(4) It is also possible to display one or more of the replaced images by inverting them.
[0021]
【The invention's effect】
The present invention has the following various effects.
(1) Even when the code of the information display medium displays a management number or the like, it is possible to prevent the user from being aware of such a situation by visual observation. In addition, the cord can have a decorative effect. (2) Even if a copy of the information display medium circulates, the copy source can be traced using the code as a clue.
[0022]
(3) Even when the code of the information display medium displays a management number or the like, it is possible to create a code that does not make the user aware of such a thing by visual observation. Furthermore, a code having a decorative effect can be created.
(4) The code of the information display medium can be quickly read by mechanical means.
[Brief description of the drawings]
FIG. 1 illustrates an embodiment of a cord according to the present invention.
FIG. 2 is a diagram illustrating pixel information of images before and after replacement.
FIG. 3 is a diagram showing an embodiment of an information display medium provided with formed images 1 and 2;
FIG. 4 is a diagram illustrating an embodiment of a code reading method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Information display medium 20 Reading apparatus 21 Optical sensor 22 Conversion apparatus 23 Computer 24 Display apparatus

Claims (3)

A base material portion capable of displaying information by printing, printing, or handwriting;
A code image displayed on the substrate portion;
An information display medium comprising:
The code image is displayed only in a matrix-like code image after replacement of two or more,
The replaced code image is obtained by replacing each pixel information in a predetermined matrix of a code image before replacement consisting of characters, figures, symbols, or a combination thereof with two or more predetermined pieces of pixel information, said pixel information after the replacement with the pixel information, as the position in the matrix corresponding to the predetermined number of formed when arranging the pixel information of said predetermined number after the replacement in each of said predetermined number of matrices An information display medium comprising an image. A method for manufacturing the information display medium according to claim 1,
Character, a step of replacing each pixel information in a given matrix graphic or symbol, or substituted before the code image composed of these binding each 2 or more predetermined number of pixel information based on random or predetermined operation,
By arranging the predetermined number of the pixel information after replacement in the predetermined number of matrices so that the positions in the matrix of the pixel information before replacement and the pixel information after replacement correspond to each other. Creating a replacement code image consisting of images ;
Printing the code image after the replacement on the substrate part;
A method for manufacturing an information display medium, comprising: A method of using the information display medium according to claim 1,
Reading each pixel information of the replaced code image in the predetermined matrix of the predetermined number of displayed images ;
A step of inverse permutation to one pixel information based on the predetermined number of pixel information positions corresponding in the matrix of a predetermined number of images of the code image after the replacement to a predetermined operation,
And forming the code image before the replacement by the position in the matrix of the pixel information after the replacement and the pixel information before replacement arranging the pixel information before replacement to correspond to the matrix,
A method of using an information display medium, comprising: reading a code from a code image before the replacement .

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