JP2004248246A - Document creating apparatus for verifying alteration, alteration verifying apparatus, document creating method for verifying alteration, alteration verifying method, document creation program for verifying all alteration program for verifying alteration and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a document creating apparatus for verifying alteration, alteration verifying apparatus, document creating method for verifying alteration, alteration verifying method, document creation program for verifying alteration and alteration verification program for provisioning a printed matter capable of particularly verifying alteration with respect to alteration verification technology of a printed matter. <P>SOLUTION: The present invention includes a processing target image information acquiring means 113 for acquiring image data which become a processing target, and a print means 134 for generating image data painting out an image over the image data acquired by an image reading means 212 with dots of a predetermined pattern. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a falsification verification technology for printed materials, and in particular, a falsification verification document creation device, a falsification verification document creation method, a falsification verification document creation program, a recording medium, and a falsification verification document creation device for creating a printed material for falsification verification. The present invention relates to a falsification verification device, a falsification verification method, a falsification verification program, and a recording medium that can warn of a fact or further display and print a falsification state.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as disclosed in Patent Document 1, there is known a technique of converting a document which is already a printed matter into a printed matter compatible with falsification verification. In this technique, information dependent on a printed material is added to a printed material in a format such as a barcode, and at the time of verification, information in the printed material is compared with information added in a format such as a barcode.
Further, as disclosed in Patent Document 2, there is also known a verification technique that prevents falsification of the contents of a printed matter and also confirms uniqueness at the same time.
[0003]
Further, as shown in Patent Document 3, a form image is encoded in a format having reproducibility, a form is recorded in a predetermined recording format, and a form image and a form image reproduced from the code are used for verification. Verification techniques for comparing are also known.
Furthermore, as disclosed in Patent Document 4, there is also known a technique for determining whether digital image data has been tampered with using a digital watermark.
[0004]
[Patent Document 1] JP-A-8-297743
[Patent Document 2] JP-A-2002-99209
[Patent Document 3] JP-A-2002-298120
[Patent Document 4] JP-A-11-98344
[0005]
[Problems to be solved by the invention]
In the technique of Patent Literature 1, what has already been printed is to be verified, and a document file created by a word processor or the like is not configured to be printed as a falsification verification document. In the technique of Patent Literature 2, since an ID sheet that outputs ID information in response to a radio wave is used, a printed matter corresponding to falsification verification cannot be easily created at low cost.
[0006]
According to the technique disclosed in Patent Document 3, since the verification is performed visually, the efficiency of verification of a plurality of documents is low, and it is not suitable for verifying a large amount of printed matter such as a receipt, an invoice, and a slip in a short time.
In the technique of Patent Document 4, data to be verified is only digital image data, and cannot be applied to a printed material.
[0007]
An object of the present invention is to provide a falsification verification document creation device, a falsification verification document creation method, a falsification verification document creation program, and a recording medium for creating a printed matter for falsification verification.
Another object of the present invention is to provide a falsification verification device, a falsification verification method, a falsification verification program, and a recording medium that can warn of the fact of falsification or display and print the falsification state.
[0008]
[Means for Solving the Problems]
A falsification verification document creation device according to the present invention includes: a processing target image information obtaining unit that obtains information on an image to be processed; and a predetermined pattern of the entire image or a predetermined portion of the image obtained by the processing target image information obtaining unit. And falsification verification image information generating means for generating information related to the image filled in with.
[0009]
Here, the predetermined pattern is typically a pattern composed of dots, but may be a pattern composed of lines or predetermined figures.
[0010]
In the falsification verification document creation device according to the present invention, the falsification verification image information generating means can generate image information in which only a plain background portion is filled with the predetermined pattern. In the falsification verification document creation device according to the present invention, the predetermined pattern can be a background dot pattern constituting a background of an image.
[0011]
In the falsification verification document creation device of the present invention, the falsification verification image information generating means may include a printing unit for printing an image related to the image information generated by the falsification verification image information generating unit, and the image generated by the falsification verification image information generating unit may be provided. Communication means for transmitting information to another device via a communication path or a communication network can be provided.
[0012]
In the falsification verification document creation device according to the present invention, the falsification verification image information generating unit generates the dots for each of the regions of the processing target image that is subdivided into a plurality of regions. It can be configured to have a dot number adjusting means for adjusting the number of dots in the area to have a predetermined characteristic. In this case, the predetermined characteristic may be a characteristic indicating whether the number of dots included in each area is an odd number or an even number.
[0013]
Accordingly, for example, the falsification verification device described later can verify the falsification for each of the subdivided rectangles, so that the falsified portion can be easily specified when tampering occurs.
[0014]
In the falsification verification document creation device according to the present invention, the falsification verification image information generating means can be configured to perform processing on a part of the processing target image. Accordingly, since the dots for falsification verification are generated only for the regions that need to be verified for falsification specified in advance, there is no need to perform any processing for the regions that do not require falsification verification. Further, the performance of the tampering verification is improved, and the influence on the image to be processed can be reduced.
[0015]
The falsification verification document creation device of the present invention may include means for enabling or disabling the processing by the falsification verification image information generating means.
[0016]
A falsification verification device according to the present invention includes an image reading unit that reads a document image, a dot number counting unit that divides the image read by the image reading unit into a plurality of regions, and counts the number of dots that are formed in the divided image. Means, a tampering verification means for verifying whether or not the subdivided area has been tampered with, based on whether or not the count value of the dot number counting means has a predetermined characteristic; and outputting a verification result of the tampering verification means. Verification result output means.
[0017]
In the falsification verification device of the present invention, the predetermined characteristic may be a characteristic indicating whether the number of dots included in each area is an odd number or an even number.
The falsification verification device of the present invention can be configured such that the verification result output means has falsification information display means, and when the falsification verification means verifies that there has been falsification, the information display means has no falsification. It is possible to display information indicating that the information has been tampered with, or further tampering location information or tampering status.
[0018]
The falsification verification device of the present invention can be configured such that the verification result output means includes a falsification information printing means, and when the falsification verification means verifies that there has been falsification, the information printing means confirms that falsification has occurred. It is possible to print out the fact that the information has been tampered with, or further tampered location information or the tampered state.
[0019]
The falsification verification device of the present invention can be configured such that the verification result output means has a warning voice output means, and when the falsification verification means verifies that the falsification has been performed, the warning voice output means checks whether the falsification has been performed. A sound can be output to warn of the presence.
[0020]
The falsification verification device of the present invention can be configured such that the verification result output means has falsification information storage means, and when the falsification verification means verifies that falsification has occurred, the falsification information storage means performs the verification. The result and the image read by the image reading means can be stored.
[0021]
The falsification verification document creation method according to the present invention includes: an image information acquisition step of acquiring image information of an image to be processed; and determining only a plain background portion of the image of the image information acquired in the image information acquisition step. Generating an image information for falsification verification for generating image information filled with dots of a pattern.
[0022]
The falsification verification document creation method according to the present invention may include a printing step of printing an image related to the image information generated in the falsification verification image information generation step.
[0023]
The falsification verification document creation method according to the present invention may include a transmission step of transmitting an image relating to the image information generated in the falsification verification image information generation step to another device via a communication path or a communication network.
[0024]
In the falsification verification document creation method according to the present invention, for each of the regions of the processing target image that is subdivided into a plurality of regions, when the dots are generated, the number of dots to be generated has a predetermined characteristic. Adjusting step for adjusting the number of dots. In this case, the predetermined characteristic may be a characteristic indicating whether the number of dots included in each area is an odd number or an even number.
[0025]
In the falsification verification document creation method according to the present invention, in the falsification verification image information generating step, a process can be performed on a predetermined range image that constitutes a part of the processing target image specified in advance.
[0026]
In the falsification verification method of the present invention, an image reading step for reading a document image, and a dot number for dividing the image read in the image reading step into a plurality of areas and counting the number of dots formed in the divided image A counting step, a dot number adjusting step of adjusting a count value in the dot number counting step to have a predetermined characteristic, and a verification result output step of outputting a verification result in the falsification verification step. .
[0027]
In the falsification verification method of the present invention, the predetermined characteristic may be a characteristic indicating whether the number of dots included in each area is an odd number or an even number.
[0028]
In the tampering verification method of the present invention, in the verification result output step, when it is verified that there has been tampering, a tampering display output step of displaying that there has been tampering or further tampering location information or tampering state. Can be prepared.
[0029]
In the falsification verification method of the present invention, the verification result output step includes a falsification printing step of printing out the falsification or further falsification location information or the falsification state when the falsification is verified. be able to.
[0030]
In the falsification verification method of the present invention, the verification result output step may include a warning sound output step of outputting a sound for warning that tampering has been performed when it is verified that tampering has occurred.
[0031]
In the falsification verification method according to the present invention, when it is verified in the verification result output step that tampering has occurred, falsification information storage for storing the verification result and the image read in the image reading step in a predetermined storage device. Steps may be provided.
[0032]
The falsification verification document creation program according to the present invention executes each step in the above-described falsification verification document creation method, and the falsification verification program according to the present invention executes each step in the above-described falsification verification method. It is characterized by.
[0033]
In the present invention, the recording medium stores the falsification verification document creation program or the falsification verification program.
[0034]
According to the present invention, it is possible to visually or automatically verify that dots have been deleted due to tampering (addition or deletion of lines, figures, characters, etc.). Further, according to the present invention, it is possible to verify whether or not an image printed on ordinary paper using an ordinary laser printer or an inkjet printer has been tampered with without using a special material or ink. Therefore, it is possible to construct a system for verifying tampering at low cost. In particular, the present invention for automatically verifying tampering is suitable for mounting on a device (copying machine, facsimile machine) having a copying function.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described. In the falsification verification document creation device of the present invention, a falsification verification pattern can be added to a document image to be processed.
[0036]
FIG. 1 is a functional block diagram of the falsification verification document creation device. The falsification verification document creation device 11 includes a control unit 111, a falsification verification image creation instructing unit 112, a processing target image data acquisition unit 113, and a printing unit. Means 114 and dot formation determining means 115. Although not shown, the falsification verification document creation device 11 may include a communication unit for transmitting the created falsification verification document to another device.
[0037]
FIG. 2 shows a flowchart of the image processing. Here, the control unit 111 executes a falsification verification document creation program for generating a falsification verification image (the following steps: this program is recorded on a predetermined storage medium).
It is assumed that the control unit 111 has obtained a document print request from the user (S101). The falsification verification image creation instructing means 112 can set a print instruction for falsification verification in the print request. The processing target image data obtaining unit 113 obtains the processing target image data, and the control unit 111 determines whether the falsification verification image creation instructing unit 112 instructs the print request to perform printing for falsification verification ( S102).
[0038]
In step S102, when the printing instruction for falsification verification has not been instructed, the printing unit 114 prints the document image to which the dot image has not been added (S108), and the process ends ("end").
In step S102, when a print instruction for falsification verification has been issued, the dot formation determining unit 115 calculates the grid point position for the entire document image (S103), and determines whether or not to generate a dot for each grid point. A determination is made (S104).
[0039]
When a document is created by a word processor or the like, at least one figure (mark such as a dot) serving as a reference of a grid point can be printed on the document. When the falsification verification document is created from a document read by an image reading device such as a scanner, the figure serving as a reference of a lattice point can be previously written on the document.
[0040]
In step S104, if there is no object such as a character on each grid point (the grid point of interest) or in the vicinity of each grid point, it is determined that a dot is to be generated, and the dot is added to the original document image (S105). ). If an object such as a character exists on or near each grid point, it is determined that no dot is generated.
[0041]
In step S105, after adding the dots to the original document image, and when not adding the dots to the original document image in step S104, it is determined whether or not the processing of all grid points has been completed (S106). When the processing of the grid points has been completed, the document image to which the dot image is added is printed (108), and the processing is completed (“end”), but the processing of all the grid points is not completed in step S106. At this time, the grid point of interest is moved to the next grid point, and the process returns to step S104.
[0042]
FIG. 3A shows an example of a document image before the above-mentioned dots are formed, and FIG. 3B shows an example in which verification dots are added to the entire surface of the document image shown in FIG. ). FIG. 4A shows an enlarged part (money amount) of FIG. 3B.
[0043]
A person who verifies a printed document image can easily perform falsification verification on the document image as follows.
For example, it is assumed that the document shown in FIG. 3A has been falsified by rewriting “1” of “$ 1,000” in the received amount to “4”. FIG. 4B shows the state of tampering at this time. As shown in FIG. 4B, in the falsified document image, the character portion and the dot overlap, and there is a large blank space around the character, which is clearly different from that shown in FIG. The situation is different. From this, it is possible to visually verify whether or not tampering has been performed. In order to repair it as if it has not been tampered with even though it has been tampered with, it is necessary to delete and add dots around it when making "4" in FIG. 4 (B). However, it is virtually impossible to delete the toner fixed on the paper by a page printer (laser printer) or the ink deposited on the paper by a serial printer (inkjet printer) so as not to be unnatural. It cannot be repaired.
[0044]
A second embodiment of the falsification verification document creation device according to the present invention will be described. In the second embodiment, when falsification verification is performed on a specific part of the entire document, whether a falsification of the document is performed visually through the entire document by adding a falsification verification dot pattern to the document image to be processed. Can be verified.
[0045]
FIG. 5 is a functional block diagram of the falsification verification document creation device of the second embodiment. The falsification verification document creation device 12 includes a control unit 121, a falsification verification image creation instruction unit 122, and a process target image data acquisition. It comprises means 123, printing means 124, dot formation determining means 125, and falsification verification area designating means 126.
[0046]
FIG. 6 shows a flowchart of the image processing of the falsification verification document creation device 12 of FIG. Here, it is assumed that the control unit 121 has acquired a document print request from the user (S201). The falsification verification image creation instructing means 122 can include a print instruction for falsification verification document creation in the print request. The processing target image data obtaining unit 123 obtains the processing target image data, and the control unit 121 determines whether the print request from the falsification verification image creation instruction unit 122 includes a print instruction for creating a falsification verification document. Is determined (S202).
[0047]
If the print request does not include a print instruction for creating a falsification verification document in step S202, the printing unit 124 prints a document image to which a dot image is not added (S209), and ends the process (" End ").
[0048]
In step S202, when a print instruction for falsification verification has been issued, the dot formation determination unit 125 calculates the grid point position (S203), and the grid point of interest is included in the specified falsification verification area. It is determined whether or not a dot is generated for each grid point if it is determined that the pixel is included in the falsification verification designated area (S205). That is, in step S205, it is determined that a dot is to be generated unless an object such as a character is present on each grid point (a grid point of interest) or in the vicinity of each grid point, and the dots are added to the original document image. (S206). If an object such as a character exists on or near each grid point, it is determined that no dot is generated.
[0049]
In step S206, after adding the dots to the original document image, and when not adding the dots to the original document image in step S204, it is determined whether or not the processing of all grid points has been completed (S207). If the processing of the grid point has been completed, the document image to which the dot image has been added is printed (S209), and the processing is completed (“end”). If the processing has not been completed for all grid points in step S207 (when there are grid points to be processed), the grid point of interest is moved to the next grid point, and the process returns to step S204.
[0050]
FIG. 7B shows an example in which verification dots are added to the entire surface of the document image shown in FIG. 7A according to the above procedure. An enlarged view of a part (money amount) of FIG. 7B is the same as FIG. 4A. Further, a state in which a part (money amount) when tampered with is enlarged is the same as FIG. 4B, and is not shown here.
[0051]
A person who verifies a printed document image can easily perform falsification verification on the document image, as in the first embodiment.
[0052]
The procedure for verifying tampering is the same as in the first embodiment. However, in the second embodiment, as compared with the first embodiment, the falsification verification area is limited, so that a falsified document can be verified in more detail and more efficiently.
[0053]
A third embodiment of the falsification verification document creation device according to the present invention will be described. In the third embodiment, a falsification verification dot pattern is added to a document image that is a processing target image, and it is possible to verify whether there is falsification of the document throughout the entire document without visual observation.
[0054]
FIG. 8 is a functional block diagram of the falsification verification document creation device according to the third embodiment. The falsification verification document creation device 13 includes a control unit 131, a falsification verification image creation instruction unit 132, and a process target image data acquisition unit. It comprises means 133, printing means 134, and dot formation determining means 135. Verification of whether the document created by the falsification verification document creation device 13 has been tampered with is performed by a falsification verification device 21 (FIG. 11) described later.
[0055]
FIG. 9 shows a flowchart of the falsification verification document creation device 13 of FIG. Here, it is assumed that the control unit 131 has acquired a document print request from the user (S301). The falsification verification image creation instructing unit 132 can set a print instruction for falsification verification in a print request. The processing target image data obtaining unit 133 obtains the processing target image data, and the control unit 131 determines whether the falsification verification image creation instruction unit 132 instructs the print request to perform printing for falsification verification ( S302).
[0056]
If the instruction for falsification verification printing has not been issued in step S302, the printing unit 134 prints the document image to which the dot image has not been added (S310), and the process ends ("end").
[0057]
In step S302, when a print instruction for falsification verification has been issued, the dot formation determining unit 135 divides the entire document image into a plurality of rectangular areas, calculates grid point positions (S303), and pays attention. It is determined whether or not to generate a dot for each grid point of the existing rectangular area (S304). That is, in step S304, it is determined that a dot is to be generated unless an object such as a character exists on each grid point (a grid point of interest) or in the vicinity of each grid point, and the dot is added to the original document image. (S305). If an object such as a character exists on or near each grid point, it is determined that no dot is generated.
[0058]
In step S305, after adding the dots to the original document image, and when not adding the dots to the original document image in step S304, it is determined whether or not the processing of all the grid points of the rectangular area of interest has been completed. If it is determined (S306) that the processing for all the grid points has not been completed, the processing is shifted to the next grid point (S309), the processing returns to step S304, and the processing for all the grid points has been completed. At this time, adjustment is performed so that the number of dots in the rectangle is even or odd (S307). More specifically, first, as shown in FIG. 10, a rectangular area is formed by a set of a plurality of dots (in the example of FIG. 10, 8 dots × 8 dots = 64 dots indicated by dotted lines). A random number of 0 or 1 is separately generated for the rectangle. Next, the number of dots in the rectangular area is adjusted so that when the value of the random number is 0, it is even and when it is 1, the number is odd. That is, if the even number or the odd number of the number before the adjustment is the same as that after the adjustment, nothing is performed. If the number is different from the number after the adjustment, the appropriate one is deleted, and the even number or the odd number corresponding to 0 or 1 is deleted. Can be realized. It should be noted that the number of dots in the rectangular area may be determined in advance so that it is always even or odd.
[0059]
Next, a procedure for verifying tampering will be described. FIG. 11 is a functional block diagram showing an embodiment of the tampering verification device of the present invention. In FIG. 11, the falsification verification device 21 includes a control unit 211 for controlling the entire device, an image reading unit 212, a falsification verification unit 213, and a verification result output unit 214.
[0060]
In FIG. 11, the verification result output unit 214 includes a falsification information display unit 2141, a falsification information printing unit 2142, a warning voice output unit 2143, and a falsification information storage unit 2144, but has at least one of them. Just do it.
The falsification information display means 2141 is specifically a display such as a liquid crystal display, the falsification information printing means 2142 is a printer, the warning sound output means 2143 is specifically a speaker, and the falsification information storage means 2144 is a memory or a memory. It is a recording medium such as a magnetic disk.
[0061]
FIG. 12 shows a flow chart of the tampering verification by the tampering verification device 21 of FIG. Here, the control unit 211 executes a falsification verification program (the following steps: this program is recorded on a predetermined storage medium) for generating a falsification verification image. First, a document is acquired by an image acquisition device such as a scanner by the image reading unit 212 (S401), a document image to be processed is generated, the entire document image is divided into a plurality of rectangular areas, and grid point positions are calculated. (S402). If it is known that this grid point position has been created in advance by the falsification verification document creation device 13 shown in FIG. 8, the grid points set in the falsification verification document creation device 13 It is the same as the specification (lattice point interval or further lattice point position). If it is not known whether or not the document has been created by the falsification verification document creating device 13 shown in FIG. It is also possible to extract the arranged dots and determine whether the process for falsification verification according to the present embodiment has been performed.
[0062]
The tampering verification unit 213 has a counter, initializes a dot number counter to 0 for a rectangular area to be processed among the rectangular areas identified in step S402 (S403), and sets a grid in the rectangular area. The presence or absence of a dot is checked for the point (S404). As a result of the inspection, if it is determined that there is a dot at the grid point, the dot number counter is incremented by 1 (S405). If it is determined that there is no dot at the grid point, the processing for all grid points in the rectangular area is performed. It is determined whether the process has been completed (S406). If the processing has been completed for all the grid points in the rectangular area of interest, the grid point of interest is moved to the next grid point (S407). It is determined whether the even / odd number of dots in the area matches the random number 0/1 at the time of printing (S408). In step S408, if it is determined that they match, it is determined that the target rectangle has not been tampered with (S409). If it is determined that they do not match, it is determined that the target rectangle has been tampered with (S410).
[0063]
Next, it is determined whether or not processing has been completed for all grid points (S411). When processing has been completed for all grid points, the verification result output unit 214 outputs the tampering verification result determined for each rectangle. (S413), and terminates all the processing. If the processing has not been completed for all grid points, the rectangular area of interest is moved to the next rectangular area (S412).
[0064]
In step S413, when the tampering is verified, the verification result output unit 214 can cause the tampering information display unit 2141 to output the tampering information, and can cause the printing unit 2142 to print out. The warning sound output unit 2143 can also output a warning sound. In addition, the falsification information can be stored in the falsification information storage means 2144 and displayed on the falsification information display means 2141 or printed out on the printing means 2142.
[0065]
When the tampering is verified, the verification result output unit 214 can cause the tampering information display unit 2141 to output the tampering information, can cause the printing unit 2142 to perform the print output, and further outputs a warning voice output unit. A warning sound can also be output to 2143. In addition, the falsification information can be stored in the falsification information storage means 2144 and displayed on the falsification information display means 2141 or printed out on the printing means 2142.
[0066]
FIG. 13 is a functional block diagram showing another embodiment of the tampering verification device of the present invention. 13, the falsification verification device 22 includes a control unit 221 for controlling the entire device, an image reading unit 222, a falsification verification unit 223, and a verification result output unit 224. Here, the falsification verification unit 223 includes an error verification unit 2231 and a falsification determination unit 2232. The control unit 221 and the image reading unit 222 are the same as the control unit 211 and the image reading unit 212 in FIG. Further, the error verification unit 2231 functions similarly to the falsification verification unit 213 in FIG. When the error verifying unit 2231 verifies a predetermined number of errors (that is, corresponds to tampering in the embodiment of FIG. 11), the error verifying unit 2231 checks information on the error (the image read by the image reading unit 222 and the position of the error). It is stored in a predetermined storage device. The falsification determination unit 2232 determines whether the processing target image (document image) has been falsified based on the number of errors stored in the storage device. For example, the “suspicion of tampering” can be set according to the number of errors, and if the number of errors is n or more (the number of errors is n or more: for example, n = 2), it is determined that “falsification has occurred”. can do.
[0067]
FIG. 14 shows a flow chart of verification of tampering by the tampering verification device 22 of FIG. In FIG. 14, the processing from S501 to S513 is the same as the processing from S401 to S413 in FIG.
In step S5131, it is determined whether there is an error. If there is no error, the process ends.
[0068]
When it is determined that there is an error in the rectangular area of interest, the fact that there is an error is displayed on the falsification information display means 2241 according to the number of errors (according to the level of suspected falsification of the error), and the falsification information is printed. The printout is performed by the unit 2242, the warning sound is output by the warning sound output unit 2243, and the falsification information can be stored in the falsification information storage unit 2244 (S5132).
[0069]
FIG. 15 shows a specific example of verification of tampering by the above procedure.
Typically, the falsification information display means 2241 can perform the display shown in FIG. 16A, and the falsification information printing means 2242 can perform the print output shown in FIG. 16B.
[0070]
【The invention's effect】
According to the present invention, a document file created by a word processor or the like can be created directly on a general-purpose printer or the like as a document for falsification verification. In addition, since special paper (such as ID paper that outputs ID information in response to radio waves) or a device is not used, documents for falsification verification, such as receipts and bills, can be easily created at low cost. Furthermore, when performing automatic verification, a large number of documents such as receipts, invoices, and slips can be verified in a short time.
[Brief description of the drawings]
FIG. 1 is a functional block diagram illustrating a falsification verification document creation device according to a first embodiment of the present invention.
FIG. 2 is a flowchart showing processing according to the first embodiment of the present invention.
3A is a diagram illustrating a document image to be processed; FIG. 3B is a diagram illustrating an example in which a dot pattern is added to the entire surface of the document image in FIG. 3A;
4A is a diagram showing a partially enlarged document image of FIG. 3B, and FIG. 4B is a diagram showing a state in which the document image shown in FIG. 3A has been tampered with; It is.
FIG. 5 is a functional block diagram illustrating a falsification verification document creation device according to a second embodiment of the present invention.
FIG. 6 is a flowchart illustrating a process according to a second embodiment of the present invention.
7A is a diagram illustrating a document image to be processed, and FIG. 7B is a diagram illustrating an example in which a dot pattern is added to the entire surface of the document image of FIG.
FIG. 8 is a functional block diagram illustrating a falsification verification document creation device according to a third embodiment of the present invention.
FIG. 9 is a flowchart showing a process according to a third embodiment of the present invention.
FIG. 10 is a diagram illustrating a state in which a rectangular area is configured by a set of a plurality of dots.
FIG. 11 is a functional block diagram illustrating an example of a tampering verification device according to the present invention.
FIG. 12 is a flowchart showing an embodiment of tampering verification by the tampering verification device of FIG. 11;
FIG. 13 is a functional block diagram showing another example of the falsification device of the present invention.
FIG. 14 is a flowchart showing an embodiment of tampering verification by the tampering verification device of FIG. 13;
FIG. 15 is an explanatory diagram showing a falsification verification process.
16A is a diagram illustrating a display example displayed on a falsification information display unit, and FIG. 16B is a diagram illustrating a print output example by a printing unit.
[Explanation of symbols]
11,12,13 Tamper verification document creation device
21, 22, 31 Tamper verification device
111, 121, 131, 211, 221 control means
112, 122, 132 Image creation instructing means for falsification verification
113, 123, 133 Processing target image data acquisition means
114, 124, 134 printing means
115, 125, 135 dot formation determining means
126 Tamper verification area designation means
212, 222 image reading means
213,223 Tampering verification means
214, 224 verification result output means
2141, 241 Tampering information display means
2142, 2242 Tampering information printing means
2143, 2243 Warning sound output means
2144, 2244 Tampering information storage means
2231 Error verification means
2232 Tampering determination means

Claims (30)

Processing target image information obtaining means for obtaining information on an image to be processed,
Tamper verification image information generating means for generating information relating to an image obtained by filling the entire or predetermined part of the image obtained by the processing target image information obtaining means with a predetermined pattern,
A document creation device for falsification verification, comprising: 2. The falsification verification document creation device according to claim 1, wherein the falsification verification image information generation means generates image information in which only a plain background portion is filled with the predetermined pattern. 3. The falsification verification document creation device according to claim 1, wherein the predetermined pattern is a background dot pattern forming a background of an image. 4. The falsification verification document creation device according to claim 1, further comprising a printing unit that prints an image related to the image information generated by the falsification verification image information generation unit. The falsification according to any one of claims 1 to 4, further comprising a communication unit that transmits the image information generated by the falsification verification image information generation unit to another device via a communication path or a communication network. Verification document creation device. The falsification verification image information generating means, when generating the dots for each of the regions of the processing target image divided into a plurality of regions, such that the number of dots in each of the regions has a predetermined characteristic. 6. The falsification verification document creating apparatus according to claim 1, further comprising a dot number adjusting means for adjusting. 7. The falsification verification document creating apparatus according to claim 6, wherein the predetermined characteristic is a characteristic indicating whether the number of dots included in each of the areas is an odd number or an even number. The falsification verification document creation device according to any one of claims 1 to 7, wherein the falsification verification image information generating means performs processing on a part of the processing target image. Image reading means for reading an original image,
A dot number counting unit that subdivides the image read by the image reading unit into a plurality of regions, and counts the number of dots formed in the subdivided image,
Whether the count value of the dot number counting means has a predetermined characteristic or not, falsification verification means for verifying whether the subdivided area has been falsified,
Verification result output means for outputting a verification result of the falsification verification means,
A falsification verification device characterized by comprising: The falsification verification device according to claim 9, wherein the predetermined characteristic is a characteristic indicating whether the number of dots included in each area is an odd number or an even number. The verification result output means has falsification information display means, and when the falsification verification means verifies that there has been falsification, the information display means has falsification, or further falsification location information or falsification status. 11. The falsification verification device according to claim 10, wherein the information is displayed. When the verification result output means has a falsification information printing means, and the falsification verification means verifies that there has been falsification, the information printing means has falsification, or further falsification location information or a falsification state. The falsification verification device according to claim 10, wherein the falsification verification device prints out the information. The verification result output unit has a warning sound output unit, and when the tampering verification unit verifies that there has been tampering, the warning sound output unit outputs a sound warning that there has been tampering. The falsification verification device according to claim 10, wherein: The verification result output means has falsification information storage means, and when the falsification verification means verifies that falsification has occurred, the falsification information storage means reads the verification result and the image read by the image reading means. 14. The falsification verification device according to claim 10, wherein the data is stored. An image information obtaining step of obtaining image information on an image to be processed;
An image information generation step for falsification verification for generating image information in which only a plain background portion of an image according to the image information obtained in the image information obtaining step is filled with dots of a predetermined pattern,
A method for creating a falsification verification document, comprising: 16. The falsification verification document creation method according to claim 15, further comprising a printing step of printing an image related to the image information generated in the falsification verification image information generation step. 17. The falsification according to claim 15, further comprising a transmission step of transmitting an image related to the image information generated in the falsification verification image information generation step to another device via a communication path or a communication network. Verification document creation method. A dot number adjusting step of adjusting, when the dots are generated, the number of the dots to be generated so as to have a predetermined characteristic, for each of the regions of the processing target image divided into a plurality of regions. The falsification verification document creation method according to any one of claims 15 to 17, wherein: 19. The falsification verification document creation method according to claim 18, wherein the predetermined characteristic is a characteristic indicating whether the number of dots included in each area is an odd number or an even number. 20. The image processing apparatus according to claim 15, wherein in the falsification verification image information generating step, a process is performed on a predetermined range image that constitutes a part of the processing target image specified in advance. Document creation method for falsification verification. An image reading step of reading an original image;
A step of subdividing the image read in the image reading step into a plurality of regions, and counting the number of dots formed in the subdivided image;
A dot number adjusting step of adjusting the count value by the dot number counting step to have a predetermined characteristic,
A verification result output step of outputting a verification result in the falsification verification step,
A falsification verification method characterized by comprising: 22. The falsification verification method according to claim 21, wherein the predetermined characteristic is a characteristic indicating whether the number of dots included in each area is an odd number or an even number. In the verification result output step, when it is verified that there has been tampering, there is provided a tampering display output step of displaying that there has been tampering, or further tampering location information or tampering state on a display. Item 25. The falsification verification method according to Item 21 or 22. In the verification result output step, when it is verified that there has been tampering, there is provided a tampering printing step of printing out that there has been tampering, or further tampering location information or tampering status. 21. The falsification verification method according to any one of 21 to 23. 25. The apparatus according to claim 21, further comprising a warning sound output step of outputting a sound for warning that there has been tampering when the tampering has been verified in the verification result output step. Falsification verification method described in Crab. In the verification result output step, when it is verified that there has been tampering, there is provided a tampering information storage step of storing the verification result and the image read in the image reading step in a predetermined storage device. 26. The falsification verification method according to claim 21, wherein the falsification is verified. 21. A falsification verification document creation program that executes each step of claim 15 to claim 20. 27. A falsification verification program for executing each step of claim 21 to claim 26. A computer-readable recording medium storing the falsification verification document creation program according to claim 27. A computer-readable recording medium storing the falsification verification program according to claim 28.

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