File determination system, file determination method, and information processing apparatus

Abstract

The present invention provides a document judgment system, a document judgment method, and an information processing apparatus that can simply judge whether it is a genuine printed matter. The document judgment system includes: a server device that stores document data; a second multifunction printer that generates a genuine printed matter, where the genuine printed matter is a real printed matter in which the document represented by the document data stored in the server device is printed, and at least a part of the document is printed with composite black represented by inks of multiple colors; a third multifunction printer that reads a printed surface of a reading object including the genuine printed matter or a copy printed matter obtained by copying the genuine printed matter, and the server device judges whether the reading object read by the third multifunction printer is a genuine printed matter based on whether at least a part of the document represented by the reading data generated by the reading of the third multifunction printer is printed with composite black.

Description

Technical Field

[0001] The present invention relates to a document determination system, a document determination method, and an information processing apparatus. Background Art

[0002] Conventionally, a technique for identifying an original document and a copy has been known.

[0003] In Patent Document 1, a technique is described in which a hash value generated from print data is embedded as a pattern and printed, so that the authenticity of a document can be confirmed.

[0004] In the technique for identifying an original document and a copy, a technique is sought that can more simply determine whether a document is an original compared to the techniques described in Patent Document 1 and the like.

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2008-16934 Summary of the Invention

[0006] One aspect for solving the above problems is a document determination system including: an information processing apparatus that stores document data; a printing apparatus that generates an original print, the original print being an original print that prints the document represented by the document data stored in the information processing apparatus and at least a part of the document is printed with a black, i.e., composite black, represented by a plurality of color printing materials; a reading apparatus that reads a printed surface of a reading target including the original print or a copy print obtained by copying the original print, and the information processing apparatus determines whether the reading target read by the reading apparatus is the original print based on whether at least a part of the document represented by the reading data generated by the reading of the reading apparatus is printed with the composite black.

[0007] Another aspect for solving the above problems is a document determination method including the steps of: generating an original print, the original print being an original print that prints the document represented by the document data stored in the information processing apparatus and at least a part of the document is printed with a black, i.e., composite black, represented by a plurality of color printing materials; a step in which a reading apparatus reads a printed surface of a reading target including the original print or a copy print obtained by copying the original print; and a step of determining whether the reading target read by the reading apparatus is the original print based on whether at least a part of the document represented by the reading data generated by the reading of the reading apparatus is printed with the composite black.

[0008] Another way to solve the above problems is an information processing device, comprising: a storage unit that stores file data; a authenticity determination unit that determines whether a reading object read by the reading device is a genuine printed matter based on whether at least a part of the file represented by the reading data generated by reading through the reading device is printed in black, i.e., composite black, which is represented by printing materials of multiple colors, wherein the genuine printed matter is a genuine printed matter that prints the file represented by the file data stored in the storage unit, and at least a part of the file represented by the file data stored in the storage unit is printed in the composite black. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a diagram showing the structure of a document judgment system.

[0010] Figure 2 It is a flowchart showing the operation of the document judgment system.

[0011] Figure 3 It is a flowchart showing the registration request information generation process.

[0012] Figure 4 It is a diagram for specifically explaining the registration request information generation process.

[0013] Figure 5 It is a flowchart showing the operation of the document judgment system.

[0014] Figure 6 It is a flowchart showing the operation of the document judgment system.

[0015] Figure 7 It is a diagram showing an example of a genuine printed matter.

[0016] Figure 8 It is a flowchart showing the operation of the document judgment system.

[0017] Figure 9 It is a diagram schematically showing the scanning resolution and the dots of the ink. DETAILED DESCRIPTION OF THE INVENTION

[0018] Figure 1 It is a diagram showing the structure of the document judgment system 1000.

[0019] The document judgment system 1000 includes: a server device 1, a first multifunction machine 2A, a second multifunction machine 2B, a third multifunction machine 2C, and a terminal device 3.

[0020] In the following description, without distinguishing between the first multifunction machine 2A, the second multifunction machine 2B, and the third multifunction machine 2C, they are referred to as "multifunction machine" and marked with the symbol "2".

[0021] The server device 1 corresponds to an example of an "information processing device". In the present embodiment, the second multifunction peripheral 2B corresponds to an example of a "printing device". In the present embodiment, the third multifunction peripheral 2C corresponds to an example of a "reading device".

[0022] The multifunction peripherals 2 and the terminal device 3 are respectively connected to the communication network NW and are connected to the server device 1 in a communicable manner. The communication network NW is a network composed of a public line network, a dedicated line, other communication lines, and various communication devices, and the specific manner is not limited. For example, the communication network NW can be a wide area network or a local network laid inside a building. In addition, the communication network NW can also have a structure including at least one of a wireless communication circuit and a wired communication circuit.

[0023] The multifunction peripheral 2 is a device called MFP (Multi Function Peripherals) and has various functions such as a printing function or a scanning function. The multifunction peripheral 2 of the present embodiment includes a serial inkjet head and performs printing through the inkjet head.

[0024] The first multifunction peripheral 2A registers the document data 1114 in the server device 1 by sending the document data 1114 to the server device 1. The document data 1114 sent by the first multifunction peripheral 2A is the read data generated by the scanning function of the first multifunction peripheral 2A. As the data format of the read data, a PDF (Portable Document Format) format can be exemplified.

[0025] The second multifunction peripheral 2B receives the document data 1114 registered in the server device 1 from the server device 1 and prints the document represented by the received document data 1114 to generate a real printed matter AP. The real printed matter AP is a real printed matter of the document represented by the document data 1114 registered in the server device 1 that is generated and printed by the second multifunction peripheral 2B. The real printed matter AP prints the document represented by the document data 1114 stored in the server device 1, and a part of the document is printed in composite black. Composite black is black expressed by multiple colors of ink. As the combination of the colors of the ink constituting the composite black, CMYK or YK, YMC can be exemplified. Here, C is cyan, M is magenta, Y is yellow, and K is black.

[0026] The ink corresponds to an example of a "printing material".

[0027] The third composite machine 2C reads the printed surface of the object to be read through the scanning function, and requests the server device 1 to perform a authenticity determination on the object to be read of the read printed surface. The authenticity determination requested by the third composite machine 2C indicates a determination as to whether the object to be read of the printed surface read by the third composite machine 2C is an authentic printed matter AP or a copy printed matter obtained by copying the authentic printed matter AP. The copy printed matter is a printed matter obtained by the copying function. Generally, the copy printed matter prints black by pure black or composite black. In addition, pure black is black exhibited only by K ink.

[0028] The terminal device 3 is a PC (Personal Computer). Although Figure 1 the terminal device 3 shown in [[ ]] is a notebook-type PC, the terminal device 3 can be a desktop-type PC, a tablet-type PC, or a smart phone. The terminal device 3 registers the file data 1114 in the server device 1 by sending the file data 1114 to the server device 1. The file data 1114 sent by the terminal device 3 is data such as data stored in the terminal device 3 or data stored in a component connected to the terminal device 3.

[0029] The server device 1 sends the file data 1114 to the second composite machine 2B according to the request from the second composite machine 2B. When a request for authenticity determination appears from the third composite machine 2C, the server device 1 determines whether the object to be read read by the third composite machine 2C is an authentic printed matter AP or a copy printed matter.

[0030] The structure of the composite machine 2 will be described.

[0031] In the present embodiment, the first composite machine 2A, the second composite machine 2B, and the third composite machine 2C have the same structure. In [[ ]] Figure 1 the structure of the second composite machine 2B is shown in a representative manner.

[0032] The composite machine 2 includes: a composite machine control unit 20, a composite machine communication unit 21, a printing unit 22, a scanning unit 23, a composite machine input unit 24, and a composite machine display unit 25.

[0033] The composite machine control unit 20 includes a composite machine processor 200 which is a processor for executing programs such as a CPU (Central Processing Unit) or an MPU (Micro-processing unit), and a composite machine storage unit 210. The composite machine control unit 20 reads out the control program stored in the composite machine storage unit 210 through the composite machine processor 200 and executes it, thereby controlling each part of the composite machine 2. By executing the control program stored in the composite machine storage unit 210, the composite machine processor 200 functions as a composite machine communication control unit 201, a printing control unit 202, a scanning control unit 203, an authentication unit 204, a composite machine registration unit 205, a document data request unit 206, a printing data generation unit 207, and a authenticity judgment request unit 208.

[0034] The composite machine storage unit 210 includes a memory for storing the programs executed by the composite machine processor 200 or the data processed by the composite machine processor 200. The composite machine storage unit 210 stores the control programs and various other data executed by the composite machine processor 200. The composite machine storage unit 210 has a non-volatile storage area. In addition, the composite machine storage unit 210 may also include a volatile storage area and constitute the working area of the composite machine processor 200.

[0035] The composite machine communication unit 21 is a communication interface including a communication circuit and a connector, etc., and communicates with the devices connected to the communication network NW according to a specified communication standard. The communication standard of the composite machine communication unit 21 can be either a wireless communication standard or a wired communication standard.

[0036] The printing unit 22 includes structures related to printing such as an inkjet head that ejects ink onto a printing medium to form dots, a carriage that moves the inkjet head in the scanning direction, a carriage drive motor that drives the carriage, a conveyance unit that conveys the printing medium, and an ink supply unit that supplies ink to the inkjet head. The printing unit 22 performs printing on the printing medium by ejecting ink from the nozzles of the inkjet head to form dots on the printing surface of the conveyed printing medium in accordance with the control of the composite machine control unit 20.

[0037] The scanning unit 23 includes structures related to reading such as a scanner that reads the characters or images recorded on a printed matter. For example, the scanning unit 23 irradiates the object to be read with light emitted by a light source to read the recorded characters or images, and outputs the image data obtained by the reading to the composite machine control unit 20. The composite machine control unit 20 performs data processing such as RGB conversion or compression processing on the image data input from the scanning unit 23, and generates data in a specified form as the read data.

[0038] The input unit 24 of the multifunction machine is provided with an input unit such as an operation switch or a touch panel provided on the multifunction machine 2, detects operations of the user on the input unit, and outputs them to the multifunction machine control unit 20. The multifunction machine control unit 20 performs processing corresponding to the operations on the input unit based on the input from the input unit 24 of the multifunction machine.

[0039] The display unit 25 of the multifunction machine is provided with a display, and displays information on the display in accordance with the control of the multifunction machine control unit 20.

[0040] The multifunction machine processor 200 functions as a multifunction machine communication control unit 201, a printing control unit 202, a scanning control unit 203, an authentication unit 204, a multifunction machine registration unit 205, a document data request unit 206, a printing data generation unit 207, and a authenticity judgment request unit 208.

[0041] The multifunction machine communication control unit 201 communicates with devices connected to the communication network NW via the multifunction machine communication unit 21.

[0042] The printing control unit 202 controls the printing unit 22 to perform printing on a printing medium.

[0043] The scanning control unit 203 controls the scanning unit 23 to read text or images from a reading object and generate read data.

[0044] The authentication unit 204 performs user authentication. The authentication unit 204 receives, for example, the user's authentication ID (Identification) via the input unit 24 of the multifunction machine. The authentication unit 204 determines that the user authentication is successful when the received authentication ID represents a legitimate user. On the other hand, the authentication unit 204 determines that the user authentication fails when the received authentication ID does not represent a legitimate user.

[0045] The multifunction machine registration unit 205 performs registration of the document data 1114. When the multifunction machine registration unit 205 receives a registration instruction from the user via the input unit 24 of the multifunction machine, it generates registration request information indicating a registration request for the document data 1114. The registration request information includes the document data 1114 to be registered, a document ID 1111 as identification information for the document data 1114, split data 1112, and area data 1113. The split data 1112 and the area data 1113 will be described later. The multifunction machine registration unit 205 outputs the generated registration request information to the multifunction machine communication control unit 201. Thus, the registration request information is sent to the server device 1 through the multifunction machine communication control unit 201.

[0046] The divided data 1112 corresponds to an example of "specific usage data".

[0047] The file data request unit 206 requests the file data 1114 registered in the server device 1. The file data request unit 206 generates file data request information for requesting the file data 1114, and outputs the generated file data request information to the multifunction machine communication control unit 201. Thereby, the file data request information is sent to the server device 1 through the multifunction machine communication control unit 201.

[0048] The print data generation unit 207 generates print data to be processed by the print control unit 202. Details of the print data generation unit 207 will be described later. When generating the print data, the print data generation unit 207 outputs the generated print data to the print control unit 202.

[0049] The authenticity judgment request unit 208 requests the server device 1 to perform an authenticity judgment. The authenticity judgment request unit 208 generates authenticity judgment request information for requesting an authenticity judgment, and outputs the generated authenticity judgment request information to the multifunction machine communication control unit 201. Thereby, the authenticity judgment request information is sent to the server device 1 through the multifunction machine communication control unit 201.

[0050] Next, the terminal device 3 will be described.

[0051] The terminal device 3 includes: a terminal control unit 30, a terminal communication unit 31, a terminal input unit 32, and a terminal display unit 33.

[0052] The terminal control unit 30 includes a terminal processor 300 that is a processor for executing a program such as a CPU or an MPU, and a terminal storage unit 310. The terminal control unit 30 reads out the control program stored in the terminal storage unit 310 through the terminal processor 300 and executes it, thereby controlling each part of the terminal device 3. The terminal processor 300 functions as a terminal communication control unit 301 and a terminal registration unit 302 by executing the control program stored in the terminal storage unit 310.

[0053] The terminal storage unit 310 includes a memory for storing the program executed by the terminal processor 300 or the data processed by the terminal processor 300. The terminal storage unit 310 stores the control program executed by the terminal processor 300, the file data 1114, and various other data. The terminal storage unit 310 has a non-volatile storage area. In addition, the terminal storage unit 310 may include a volatile storage area and constitute the working area of the terminal processor 300.

[0054] The terminal communication unit 31 is a communication interface having a communication circuit, a connector, etc., and communicates with a device connected to the communication network NW in accordance with a specified communication standard. The communication standard of the terminal communication unit 31 can be either a wireless communication standard or a wired communication standard.

[0055] The terminal input unit 32 is connected to an input unit such as an operation switch, a panel having a touch input function, a mouse, or a keyboard provided on the terminal device 3, detects an operation on the input unit performed by the user, and outputs the detection result to the input interface of the terminal control unit 30. Based on the input from the terminal input unit 32, the terminal control unit 30 executes processing corresponding to the operation on the input unit.

[0056] The terminal display unit 33 includes a display and displays information on the display in accordance with the control of the terminal control unit 30.

[0057] The terminal processor 300 functions as a terminal communication control unit 301 and a terminal registration unit 302.

[0058] The terminal communication control unit 301 communicates with a device connected to the communication network NW via the terminal communication unit 31.

[0059] The terminal registration unit 302 performs registration of the file data 1114. When receiving a registration instruction from the user via the terminal input unit 32, the terminal registration unit 302 generates registration request information indicating a registration request for the file data 1114. The registration request information generated by the terminal registration unit 302 includes the file data 1114 to be registered, the file ID 1111, the divided data 1112, and the area data 1113, similarly to the registration request information generated by the multifunction machine registration unit 205. The terminal registration unit 302 outputs the generated registration request information to the terminal communication control unit 301. Thus, the registration request information is sent to the server device 1 via the terminal communication control unit 301.

[0060] Next, the server device 1 will be described.

[0061] The server device 1 includes a server control unit 10 and a server communication unit 11.

[0062] The server control unit 10 includes a server processor 100 which is a processor for executing programs such as a CPU or an MPU, and a server storage unit 110, and controls each part of the server device 1. The server control unit 10 controls each part of the server device 1 by the server processor 100 reading out the control program stored in the server storage unit 110. The server processor 100 functions as a server communication control unit 101, a database processing unit 102, and a authenticity judgment unit 103.

[0063] The server storage unit 110 corresponds to an example of the "storage unit".

[0064] The server storage unit 110 has a memory for storing the programs executed by the server processor 100 or the data processed by the server processor 100. The server storage unit 110 stores the control program executed by the server processor 100, the file data management DB111, and various other data. The server storage unit 110 has a non-volatile storage area. In addition, the server storage unit 110 may also have a volatile storage area and constitute the working area of the server processor 100.

[0065] The file data management BD111 is a database for managing the file data 1114 received from the multifunction machine 2 and the terminal device 3 as registration objects. One record stored in the file data management DB111 includes a file ID 1111, split data 1112, area data 1113, and file data 1114.

[0066] The server communication unit 11 has a communication interface including a communication circuit and a connector that comply with a specified communication standard, and communicates with the multifunction machine 2 and the terminal device 3 under the control of the server control unit 10.

[0067] As described above, the server processor 100 functions as a server communication control unit 101, a database processing unit 102, and an authenticity judgment unit 103.

[0068] The server communication control unit 101 communicates with the devices connected to the communication network NW via the server communication unit 11.

[0069] The database processing unit 102 executes the processing related to the file data management DB111.

[0070] The authenticity judgment unit 103 performs an authenticity judgment to judge whether it is an authentic printed matter AP or a copied printed matter.

[0071] The operation of the document judgment system 1000 will be described.

[0072] First, the operation of the document determination system 1000 related to the registration of the document data 1114 will be described.

[0073] Figure 2 FIG. is a flowchart showing the operation of the document determination system 1000. In Figure 2 the flowchart FA represents the operation of the first multifunction machine 2A, and the flowchart FB represents the operation of the server device 1.

[0074] The multifunction machine registration unit 205 determines whether a registration instruction for the document data 1114 has been received from the user via the multifunction machine input unit 24 (step SA1).

[0075] When the multifunction machine registration unit 205 determines that a registration instruction for the document data 1114 has not been received from the user (step SA1: No), it again performs the determination in step SA1.

[0076] On the other hand, when the multifunction machine registration unit 205 determines that a registration instruction for the document data 1114 has been received from the user (step SA1: Yes), the scan control unit 203 of the first multifunction machine 2A controls the scanning unit 23 to obtain read data (step SA2).

[0077] Next, the multifunction machine registration unit 205 of the first multifunction machine 2A performs a registration request information generation process for generating registration request information (step SA3).

[0078] Figure 3 FIG. is a flowchart FC showing the registration request information generation process.

[0079] The multifunction machine registration unit 205 divides the vertical and horizontal directions of the image area GA of the document represented by the document data 1114 to be registered into a specified number of divisions (step SC1). As a result, the image area GA of the document is divided into a grid pattern.

[0080] Hereinafter, one divided area will be referred to as a "divided area" and marked with the symbol "BA".

[0081] Next, the multifunction machine registration unit 205 specifies one divided area BA (step SC2), and for the specified divided area BA, determines whether to print black using composite black or pure black (step SC3).

[0082] In step SC3, for example, when the divided area BA contains a specified number or more of black pixels, the multifunction machine registration unit 205 determines that the divided area BA to be determined is printed with pure black, and when the number of black pixels contained in the divided area BA is less than the specified number, determines that the divided area BA to be determined is printed with composite black.

[0083] When the compound machine registration unit 205 determines that black is to be printed in solid black for the divided area BA specified in step SC2 (step SC3: solid black), it allocates 1-bit data representing "1" to the divided area BA specified in step SC2 (step SC4). The 1-bit data representing "1" is data indicating that the allocated divided area BA is a solid black area where black is printed in solid black.

[0084] On the other hand, when the compound machine registration unit 205 determines that black is to be printed in composite black for the divided area BA specified in step SC2 (step SC3: composite black), it allocates 1-bit data representing "0" to the divided area BA specified in step SC2 (step SC5). The 1-bit data representing "0" is data indicating that the allocated divided area BA is a composite black area where black is printed in composite black.

[0085] When performing the processing of step SC4 or step SC5, the compound machine registration unit 205 determines whether the processing of step SC4 or step SC5 has been performed for all divided areas BA (step SC6).

[0086] When the compound machine registration unit 205 determines that the processing of step SC4 or step SC5 has not been performed for all divided areas BA (step SC6: no), it returns the processing to step SC2 and performs the processing after step SC2 for the un-specified divided area BA.

[0087] When the compound machine registration unit 205 determines that the processing of step SC4 or step SC5 has been performed for all divided areas BA (step SC6: yes), it randomly selects one or more divided areas BA from the divided areas BA to which 1-bit data representing "1" has been allocated (step SC7). For example, the number of selections is about fifty percent of the total number of divided areas BA to which 1-bit data representing "1" has been allocated.

[0088] Next, for each of the divided areas BA selected in step SC7, the compound machine registration unit 205 changes the allocated 1-bit data to 1-bit data representing "0" (step SC8).

[0089] Next, the compound machine registration unit 205 generates area data 1113 (step SC9). The area data 1113 is data indicating whether each divided area BA is a composite black area or a solid black area, and is data in which the allocated 1-bit data is arranged in a specified order and described.

[0090] Next, the MFP registration unit 205 generates registration request information (step SC10). The registration request information generated in step SC10 includes division data 1112 indicating the number of vertical and horizontal divisions made in step SC1, area data 1113 generated in step SC9, the read data obtained as file data 1114 to be registered in step SA2, and a file ID 1111.

[0091] Figure 4 This is a diagram for specifically explaining the processing of generating registration request information.

[0092] In Figure 4 this case, in step SC1, the MFP registration unit 205 divides the image area GA of the file represented by the file data 1114 to be registered into a total of twenty divided areas BA, which are five vertical divisions and four horizontal divisions.

[0093] In Figure 4 this description, the divided area BA that is the I-th from the top and the J-th from the left in the diagram is expressed as the divided area BA-IJ. I and J are integers of 1 or more.

[0094] In Figure 4 this case, the MFP registration unit 205 executes steps SC2, SC3, SC4, SC5, and SC6, and assigns 1-bit data representing "1" to the divided areas BA other than the divided areas BA-24 and BA-44, and assigns 1-bit data representing "0" to the divided areas BA-24 and BA-44.

[0095] In Figure 4 this case, in step SC7, the MFP registration unit 205 selects the divided areas BA-12, BA-14, BA-22, BA-23, BA-24, BA-32, BA-34, BA-42, BA-43, and BA-44. And, in Figure 4 this case, in step SC8, the MFP registration unit 205 changes the data assigned to the divided areas BA-12, BA-14, BA-22, BA-23, BA-24, BA-32, BA-34, BA-42, BA-43, and BA-44 from 1-bit data representing "1" to 1-bit data representing "0".

[0096] In Figure 4 order to facilitate, the entire area of the divided areas BA that are assigned 1-bit data representing "1" after the processing in step SC8 is colored. As Figure 4As shown, after the process of step SC8, 1-bit data representing "1" is respectively allocated in the divided areas BA-11, BA-13, BA-21, BA-31, BA-33, BA-41, BA-51, BA-52, BA-53, and BA-54. In addition, as Figure 4 shown, after the process of step SC8, 1-bit data representing "0" is respectively allocated in the divided areas BA-12, BA-14, BA-22, BA-23, BA-24, BA-32, BA-34, BA-42, BA-43, and BA-44.

[0097] In the case of Figure 4 , the MFP registration unit 205 generates area data 1113 described in the order of rows from the upper side to the lower side in the figure and in the order from the left side to the right side for one row in the figure. That is, in the case of Figure 4 , the MFP registration unit 205 generates area data 1113 representing "(1,0,1,0), (1,0,0,0), (1,0,1,0), (1,0,0,0), (1,1,1,1)".

[0098] And, in the case of Figure 4 , the MFP registration unit 205 generates registration request information including area data 1113 of "(1,0,1,0), (1,0,0,0), (1,0,1,0), (1,0,0,0), (1,1,1,1)" and division data 1112 representing five vertical divisions and four horizontal divisions.

[0099] Return Figure 2 to the description of the flowchart FA shown. The MFP communication control unit 201 of the first MFP 2A sends the registration request information generated in step SA3 to the server device 1 (step SA4).

[0100] As shown in flowchart FB, the server communication control unit 101 of the server device 1 receives the registration request information from the first MFP 2A (step SB1).

[0101] Next, the database processing unit 102 generates a record having various data included in the received registration request information and stores the generated record in the file data management DB111 (step SB2).

[0102] In the file determination system 1000, the terminal device 3 can also register file data 1114. Figure 5 It is a flowchart showing the operation of the file determination system 1000. In Figure 5In the figure, flowchart FD represents the operation of the terminal device 3, and flowchart FE represents the operation of the server device 1.

[0103] The terminal registration unit 302 of the terminal device 3 determines whether a registration instruction for the file data 1114 has been received from the user via the terminal input unit 32 (step SD1).

[0104] When the terminal registration unit 302 determines that the registration instruction for the file data 1114 has not been received from the user (step SD1: No), it again performs the determination in step SD1.

[0105] On the other hand, when the terminal registration unit 302 determines that the registration instruction for the file data 1114 has been received from the user (step SD1: Yes), it performs a registration request information generation process (step SD2).

[0106] Regarding the registration request information generation process in step SD2, reference will be made to Figure 3 flowchart FC for explanation.

[0107] The terminal registration unit 302 divides the vertical and horizontal directions of the image area GA of the file represented by the file data 1114 to be registered into a specified number of divisions (step SC1). Examples of the file data 1114 divided by the terminal registration unit 302 include data stored in the terminal storage unit 310 or data stored in a device connected to the terminal device 3.

[0108] Next, the terminal registration unit 302 specifies a divided area BA (step SC2), and determines whether to print black with composite black or pure black for the specified divided area BA (step SC3).

[0109] When the terminal registration unit 302 determines that black is to be printed with pure black for the divided area BA specified in step SC2 (step SC3: pure black), it allocates 1-bit data representing "1" to the divided area BA specified in step SC2 (step SC4).

[0110] On the other hand, when the terminal registration unit 302 determines that black is to be printed with composite black for the divided area BA specified in step SC2 (step SC3: composite black), it allocates 1-bit data representing "0" to the divided area BA specified in step SC2 (step SC4).

[0111] When performing the process of step SC4 or step SC5, the terminal registration unit 302 determines whether the process of step SC4 or step SC5 has been performed for all the divided areas BA (step SC6).

[0112] When the terminal registration unit 302 determines that the processes of step SC4 or step SC5 have not been performed for all the divided areas BA (step SC6: No), the process returns to step SC2, and the processes after step SC2 are performed for an unspecified divided area BA.

[0113] When the terminal registration unit 302 determines that the processes of step SC4 or step SC5 have been performed for all the divided areas BA (step SC6: Yes), one or more divided areas BA are randomly selected from the divided areas BA assigned the 1-bit data representing "1" (step SC7).

[0114] Next, for each of the divided areas BA selected in step SC7, the terminal registration unit 302 changes the assigned data from the 1-bit data representing "1" to the 1-bit data representing "0" (step SC8).

[0115] Next, the terminal registration unit 302 generates area data 1113 (step SC9) and generates a registration request message (step SC10). The registration request message generated by the terminal registration unit 302 includes division data 1112 indicating the number of horizontal and vertical divisions in the division in step SC1, the area data 1113 generated in step SC9, the file data 1114 stored by the terminal storage unit 310 as the file data 1114 to be registered, and the file ID 1111.

[0116] Return Figure 5 Regarding the description of the flowchart FD shown, the terminal communication control unit 301 sends the registration request message generated in step SD2 to the server device 1 (step SD3).

[0117] As shown in the flowchart FE, the server communication control unit 101 receives the registration request message from the terminal device 3 (step SD1).

[0118] Next, the database processing unit 102 generates a record having various data included in the received registration request message and stores the generated record in the file data management DB111 (step SD2).

[0119] Next, the operation of the document judgment system 1000 related to the generation of the real printed matter AP will be described.

[0120] Figure 6 It is a flowchart showing the operation of the document judgment system 1000. In Figure 6 the flowchart FF shows the operation of the second multifunction machine 2B, and the flowchart FG shows the operation of the server device 1.

[0121] The authentication unit 204 of the second duplicating machine 2B performs user authentication (step SF1). In the case where the user authentication fails, the duplicating machine processor 200 of the second duplicating machine 2B ends the process. In the case where the user authentication succeeds, the duplicating machine processor 200 of the second duplicating machine 2B advances the process to step SF2.

[0122] The document data request unit 206 of the second duplicating machine 2B receives an instruction for specifying the document data 1114 to be printed and a print instruction via the duplicating machine input unit 24 (step SF2).

[0123] When receiving the instruction for specifying the document data 1114 and the print instruction, the document data request unit 206 generates document data request information (step SF3). The document data request information generated in step SF3 includes the document ID 1111 of the document data 1114 specified by the user.

[0124] The duplicating machine communication control unit 201 of the second duplicating machine 2B sends the document data request information generated in step SF3 to the server device 1 (step SF4).

[0125] As shown in the flowchart FG, the server communication control unit 101 of the server device 1 receives the document data request information from the second duplicating machine 2B (step SG1).

[0126] The database processing unit 102 specifies a record having the document ID 1111 included in the document data request information received in step SG1 from the document data management DB 111 (step SG2).

[0127] Next, the server communication control unit 101 sends the document ID 1111, the split data 1112, the area data 1113, and the document data 1114 included in the record specified in step SG2 to the second duplicating machine 2B as a response to the document data request information (step SG3).

[0128] As shown in the flowchart FF, the duplicating machine communication control unit 201 receives the document ID 1111, the split data 1112, the area data 1113, and the document data 1114 from the server device 1 (step SF5).

[0129] The print data generation unit 207 generates print data based on the document ID 1111, the split data 1112, the area data 1113, and the document data 1114 received in step SF5 (step SF6).

[0130] Next, the printing control unit 202 of the second compound machine 2B performs printing based on the print data generated in step SF6, thereby generating a real printed matter AP (step SF7).

[0131] Figure 7 FIG. is a diagram showing an example of the real printed matter AP.

[0132] Figure 7 Based on Figure 4 the divided data 1112 and the area data 1113 shown, the real printed matter AP of the printed file shown in Figure 4 is illustrated.

[0133] In Figure 7 , a dotted line is overlapped on the real printed matter AP. Figure 7 The dotted line shown in

[0134] is a line for facilitating the display of the area corresponding to one divided area BA in the printing area IA of the real printed matter AP, and is not printed on the actual real printed matter AP.

[0135] In the following description, in the printing area IA, the area corresponding to one divided area BA is referred to as the "corresponding area" and marked with the symbol "TA". Figure 7 In the description of

[0136] In Figure 7 , the corresponding area TA-LN corresponds to the divided area BA-IJ that includes "IJ" with the same numerical value as "LN" included in the symbol. For example, although the corresponding area TA-11 corresponds to the divided area BA-11, it does not correspond to the divided area BA other than the divided area BA-11.

[0137] In Figure 4 the image area GA of the file shown, 1-bit data representing "1" is respectively allocated in the divided areas BA-11, BA-13, BA-21, BA-31, BA-33, BA-41, BA-51, BA-52, BA-53, BA-54. Therefore, Figure 7 in the real printed matter AP shown in

[0138] In addition, in Figure 4In the image area GA shown, 1-bit data representing "0" is respectively allocated in the divided areas BA-12, BA-14, BA-22, BA-23, BA-24, BA-32, BA-34, BA-42, BA-43, BA-44. Therefore, Figure 7 In the corresponding areas TA-12, TA-14, TA-22, TA-23, TA-42, TA-32, TA-34, TA-42, TA-43, TA-44 of the real printed matter AP shown, black is printed in composite black.

[0139] In Figure 7 When generating the real printed matter AP shown, the print data generation unit 207 performs various processes such as color conversion processing, halftone processing, and rasterization processing on the document data 1114, thereby generating print data in which black is printed in solid black in the corresponding areas TA-11, TA-13, TA-21, TA-31, TA-33, TA-41, TA-51, TA-52, TA-53, TA-54. In addition, in Figure 7 When generating the real printed matter AP shown, the print data generation unit 207 performs various processes such as color conversion processing, halftone processing, and rasterization processing on the document data 1114, thereby generating print data in which black is printed in composite black in the corresponding areas TA-12, TA-14, TA-22, TA-23, TA-42, TA-32, TA-34, TA-42, TA-43, TA-44.

[0140] As Figure 7 shown, on the real printed matter AP, a coded image CD is printed in the corresponding area TA-54. The coded image CD is, for example, a QR code (registered trademark). In the coded image CD printed on the real printed matter AP, a file ID 1111 and segmentation data 1112 are recorded.

[0141] The print data generation unit 207 generates a coded image CD recording the file ID 1111 and the segmentation data 1112, generates image data in which the coded image CD is overlapped in the divided area BA-54 of the image area GA of the file, and generates print data for printing the image data.

[0142] In addition, the position where the coded image CD is printed on the real printed matter AP is not limited to Figure 7 the position shown in the lower right, and can be any position.

[0143] Next, the operation of the document judgment system 1000 related to real judgment will be described.

[0144] Figure 8is a flowchart showing the operations of the document determination system 1000. In Figure 8 the flowchart FH shows the operations of the third multifunction machine 2C, and the flowchart FI shows the operations of the server device 1.

[0145] As shown in the flowchart FH, the authenticity determination request section 208 of the third multifunction machine 2C determines whether an instruction to execute an authenticity determination has been received from the user via the multifunction machine input section 24 (step SH1).

[0146] When the authenticity determination request section 208 of the third multifunction machine 2C determines that an instruction to execute an authenticity determination has not been received from the user (step SH1: No), it again makes the determination of step SH1.

[0147] When the authenticity determination request section 208 determines that an instruction to execute an authenticity determination has been received from the user (step SH1: Yes), the scanning control section 203 of the third multifunction machine 2C scans the object to be read placed on the third multifunction machine 2C at a scanning resolution for authenticity determination (step SH2). The scanning resolution for authenticity determination is a resolution of 1200 dpi or more.

[0148] Figure 9 is a diagram schematically showing the scanning resolution and the dots of the ink.

[0149] Figure 9 The composite black dot D1 shown exemplifies the dot formed by the CMYK dots. The composite black dot D1 is a dot formed by overlapping the CMYK dots. However, in the printing of composite black, due to various factors such as the size of the ink, the type of ink, the moving speed of the carriage, and the separation distance between the inkjet nozzle surface and the printing surface of the printing medium, the CMYK dots do not completely overlap in many cases. Therefore, as Figure 9 shown, CMYK dots are formed around the composite black dot D1. In Figure 9 an example is shown where a cyan dot D2, a magenta dot D3, and a yellow dot D4 are formed around the composite black dot D1.

[0150] Figure 9 is a diagram schematically showing that the first resolution area KA1 of the scanning resolution is arranged in a grid pattern. The first resolution area KA1 represents a scanning resolution of 1200 dpi. Therefore, in Figure 9 the areas where two of the first resolution areas KA1 are adjacently arranged in the up, down, left, and right directions represent a scanning resolution of 600 dpi. Hereinafter, this area will be referred to as the "second resolution area".

[0151] In Figure 9In this case, when the scanning resolution is 1200 dpi, in multiple first-resolution regions KA1, substantially the entire domain of the first-resolution region KA1-1 is filled with cyan-green dots D1. That is to say, the read data generated by scanning at a scanning resolution of 1200 dpi becomes the data in which the cyan-green dots D2 are read as the cyan-green color. On the other hand, when the scanning resolution is 600 dpi, the second-resolution region KA2 including the first-resolution region KA1-1 contains composite black dots D1 in addition to the cyan-green dots D2. In Figure 9 In the second-resolution region KA2 shown in

[0152] Figure 9 Figure 9 As described with reference to

[0153] Returning to Figure 8 the description of the flowchart in

[0154] Next, the true judgment request unit 208 divides the image region GA of the document represented by the read data obtained by scanning in step SH2 in accordance with the horizontal and vertical division numbers represented by the division data 1112 obtained in step SH3 (step SH4).

[0155] Next, the true judgment request unit 208 specifies whether each of the divided regions BA divided in step SH4 is a composite black region or a pure black region (step SH5). The true judgment request unit 208 specifies it as a composite black region when it can recognize any one of the CMY colors and when it cannot recognize a color other than white, and specifies it as a pure black region when it can only recognize black.

[0156] Next, the true judgment request unit 208 assigns 1-bit data representing "0" to each of the regions specified as pure black regions, and assigns 1-bit data representing "1" to each of the regions specified as composite black regions (step SH6).

[0157] In addition, as described above, generally, black is printed on a copy printout using pure black or composite black. Therefore, in the case where only black is used to print information on a copy printout, the authenticity determination request unit 208 assigns 1-bit data representing "1" or 1-bit data representing "0" to all the divided regions BA divided in step SH4.

[0158] Next, the authenticity determination request unit 208 generates region data 1113 that describes the 1-bit data assigned in step SH6 in the same description order as the 1-bit data described in the region data 1113 generated by the multifunction machine registration unit 205 and the terminal registration unit 302 (step SH7). In addition, the region data 1113 generated in step SH7 includes the specific result of step SH5.

[0159] Next, the authenticity determination request unit 208 generates an authenticity determination request message (step SH8). The authenticity determination request message generated in step SH8 includes the document ID 1111 obtained in step SH3 and the region data 1113 generated in step SH7.

[0160] The multifunction machine communication control unit 201 of the third multifunction machine 2C sends the authenticity determination request message generated by the authenticity determination request unit 208 to the server device 1 (step SH9).

[0161] As shown in the flowchart FI, the server communication control unit 101 of the server device 1 receives the authenticity determination request message from the third multifunction machine 2C (step SI1).

[0162] Next, the database processing unit 102 specifies a record having the document ID 1111 included in the authenticity determination request message received in step SI1 from the file data management DB111 (step SI2).

[0163] Next, the authenticity determination unit 103 performs an authenticity determination based on the region data 1113 included in the authenticity determination request message received in step SI1 and the region data 1113 included in the record specified in step SI2 (step SI3).

[0164] In step SI3, when the number and the arrangement order of "1" and "0" are the same for the 1-bit data represented by the two area data 1113 being compared, the authenticity determination unit 103 determines that the scanned object to be read is an authentic printed matter AP. On the other hand, when at least any one of the number and the arrangement order of "1" and "0" is different for the 1-bit data represented by the two area data 1113 being compared, the authenticity determination unit 103 determines that the scanned object to be read is a copied printed matter. In addition, this determination is equivalent to the determination of whether the document represented by the read data is a document printed according to the area data 1113. Further, this determination is equivalent to the determination based on the specific result according to the divided data 1112 and the area represented by the area data 1113.

[0165] Next, the authenticity determination unit 103 generates authenticity determination result information indicating the determination result of the authenticity determination (step SI4). The authenticity determination result information indicates the following result, that is, the determination result indicating an authentic printed matter AP or the determination result indicating a copied printed matter.

[0166] The server communication control unit 101 transmits the authenticity determination result information generated by the authenticity determination unit 103 to the third multifunction machine 2C as a response to the authenticity determination request information received in step SI1 (step SI5).

[0167] As shown in the flowchart FH, the multifunction machine communication control unit 201 of the third multifunction machine 2C receives the authenticity determination result information from the server device 1 (step SH10).

[0168] Next, the multifunction machine processor 200 of the third multifunction machine 2C outputs the determination result of the authenticity determination indicated by the authenticity determination result information received in step SH10 (step SH11).

[0169] The notification method in step SH11 can be either an output implemented by display or an output implemented by printing.

[0170] As described above, the document determination system 1000 includes: a server device 1 that stores document data 1114; a second multifunction machine 2B that generates a real printed matter AP, which is a real printed matter in which the document represented by the document data 1114 stored in the server device 1 is printed, and at least a part of the document is printed in black, i.e., composite black, represented by inks of multiple colors; and a third multifunction machine 2C that reads a printing surface of a reading object including the real printed matter AP or a copied printed matter obtained by copying the real printed matter AP. The server device 1 determines whether the reading object read by the third multifunction machine 2C is a real printed matter based on whether at least a part of the document represented by the reading data generated by the reading of the third multifunction machine 2C is printed in composite black.

[0171] Accordingly, by determining whether a part of the document printed on the reading object read by the third multifunction machine 2C is printed in composite black, it is possible to determine whether the reading object read by the third multifunction machine 2C is the real printed matter AP. Therefore, for example, even without performing operations based on a hash function or the like, the document determination system 1000 can simply determine whether it is the real printed matter AP.

[0172] The server device 1 stores area data 1113 indicating an area where a part of the document represented by the stored document data 1114 is printed in composite black. The second multifunction machine 2B prints at least a part of the document in composite black according to the area data 1113 to generate the real printed matter AP. The server device 1 determines whether the reading object read by the third multifunction machine 2C is the real printed matter AP based on whether the document represented by the reading data of the third multifunction machine 2C is a document printed according to the stored area data 1113.

[0173] Accordingly, since it is determined whether it is a document printed according to the area data 1113 stored in the server device 1, it is possible to determine whether it is the real printed matter AP. Therefore, it is possible to correctly determine whether the reading object read by the third multifunction machine 2C is the real printed matter AP. Thus, the document determination system 1000 can simply and correctly determine whether it is the real printed matter AP.

[0174] An encoded image CD is printed on a real printed matter AP, and the encoded image CD records segmentation data 1112 used in a specific area printed with composite black. The second duplicating machine 2B obtains the segmentation data 1112 from the encoded image CD represented by the read data generated by the reading of the second duplicating machine 2B, and specifies the area printed with composite black in the document printed on the reading object based on the obtained segmentation data 1112. The server device 1 determines whether the reading object read by the third duplicating machine 2C is a real printed matter AP based on the specification result according to the segmentation data 1112 and the area represented by the stored area data 1113.

[0175] Accordingly, since it is possible to correctly determine whether the document represented by the read data is a document printed according to the area data 1112, it is possible to more correctly determine whether it is a real printed matter AP. Therefore, the document determination system 1000 can simply and more correctly determine whether it is a real printed matter AP.

[0176] The server device 1 stores the document data 1114, the area data 1113, and the document ID 1111 that identifies the document data 1114 in a corresponding manner. The real printed matter AP is printed with an encoded image CD that records the document ID 1111. The server device 1 determines whether the reading object read by the third duplicating machine 2C is a real printed matter AP based on whether the document represented by the read data of the third duplicating machine 2C is a document printed according to the area data 1113 corresponding to the document ID 1111 recorded in the encoded image CD represented by the read data.

[0177] Accordingly, since it is possible to determine whether it is a real printed matter AP for each document data 1114, it is possible to simply and correctly determine whether the reading object read by the third duplicating machine 2C is a real printed matter AP for each document data 1114. Therefore, the document determination system 1000 can simply and correctly determine whether it is a real printed matter AP for each document data 1114.

[0178] When determining whether the reading object read by the third duplicating machine 2C is a real printed matter AP, the server device 1 sends determination result information indicating the determination result to the third duplicating machine 2C. The third duplicating machine 2C outputs the determination result represented by the determination result information received from the server device 1.

[0179] Accordingly, the user can identify the judgment result in the third multi-function machine 2C that is the object of judgment as to whether it is a genuine printed matter AP. Thus, the user can identify the judgment result without operating a device different from the device that reads the object of judgment. That is to say, the document judgment system 1000 can improve the convenience for the user.

[0180] The document judgment method implemented by the document judgment system 1000 includes the following steps: a step of generating a genuine printed matter AP, where the genuine printed matter AP is a genuine printed matter in which the document represented by the document data 1114 stored in the server device 1 is printed, and at least a part of the document is printed in composite black represented by inks of multiple colors; a step in which the third multi-function machine 2C reads the printed surface of the object to be read including the genuine printed matter AP or the copied printed matter; a step of judging whether the object to be read read by the third multi-function machine 2C is a genuine printed matter AP based on whether at least a part of the document represented by the read data obtained by the reading of the third multi-function machine 2C is printed in composite black.

[0181] Accordingly, the same effect as that of the document judgment system 1000 is produced.

[0182] The server device 1 includes: a server storage unit 110 that stores the document data 1114; a genuine judgment unit 103 that judges whether the object to be read read by the third multi-function machine 2C is a genuine printed matter AP based on whether at least a part of the document represented by the read data generated by the reading of the third multi-function machine 2C is printed in composite black, where the genuine printed matter AP is a printed matter in which the document represented by the document data 1114 stored in the server storage unit 110 is printed, and is a genuine printed matter in which at least a part of the document represented by the document data 1114 stored in the server storage unit 110 is printed in composite black.

[0183] Accordingly, the same effect as that of the document judgment system 1000 is produced.

[0184] The above-described embodiments are ultimately examples showing one mode of the present invention, and can be arbitrarily deformed and applied within the scope of the present invention.

[0185] In the above-described embodiment, the first multi-function machine 2A is exemplified as the multi-function machine 2 for registering the document data 1114 in the server device 1. However, the multi-function machine 2 for registering the document data 1114 in the server device 1 is not limited to the first multi-function machine 2A, and may also be the second multi-function machine 2B or the third multi-function machine 2C.

[0186] In the above-described embodiment, the second multifunction machine 2B is illustrated as the multifunction machine 2 that generates the genuine printed matter AP. However, the multifunction machine 2 that generates the genuine printed matter AP is not limited to the second multifunction machine 2B, and may also be the first multifunction machine 2A or the third multifunction machine 2C. In this case, the first multifunction machine 2A or the third multifunction machine 2C corresponds to an example of the "printing device".

[0187] In the above-described embodiment, the third multifunction machine 2C is illustrated as the multifunction machine 2 that requests a genuineness determination. However, the multifunction machine 2 that requests a genuineness determination is not limited to the third multifunction machine 2C, and may also be the first multifunction machine 2A or the second multifunction machine 2B. In this case, the first multifunction machine 2A or the second multifunction machine 2B corresponds to an example of the "reading device".

[0188] In the above-described embodiment, when the multifunction machine 2 functions as the "printing device", the multifunction machine processor 200 only needs to function at least as the multifunction machine communication control unit 201, the printing control unit 202, the scanning control unit 203, the authentication unit 204, the document data request unit 206, and the print data generation unit 207.

[0189] In the above-described embodiment, when the multifunction machine 2 functions as the "reading device", the multifunction machine processor 200 only needs to function at least as the multifunction machine communication control unit 201, the printing control unit 202, the scanning control unit 203, and the genuineness determination request unit 208.

[0190] In the above-described embodiment, the number of divisions in step SC1 is not limited to five vertical divisions and four horizontal divisions. In step SC1, the image area GA of the document may also be divided more finely.

[0191] Although the serial inkjet method is illustrated as the printing method of the multifunction machine 2 in the above-described embodiment, the printing method of the multifunction machine 2 may also be the line inkjet method. In addition, the printing method of the multifunction machine 2 is not limited to the inkjet method, and may also be other printing methods such as the electrophotographic method using toner. For example, when the printing method is the electrophotographic method, the toner corresponds to an example of the printing material.

[0192] Although the multifunction machine 2 is illustrated as the printing device in the above-described embodiment, the printing device is not limited to the multifunction machine 2, and may also be a printing device such as a printer that does not have a scanning function.

[0193] In addition, the functions of the server processor 100, the multifunction machine processor 200, and the terminal processor 300 may also be implemented by one or more processors or semiconductor chips.

[0194] In addition, Figure 1 The components shown are just examples, and the specific installation method is not particularly limited. That is to say, it is not necessary to install hardware corresponding to each component separately. It goes without saying that there are also cases where the functions of each component can be realized by a single processor executing a program. In addition, in the above-described embodiments, a part of the functions implemented by software can be set as hardware, or a part of the functions implemented by hardware can be implemented by software. In addition, for the specific detailed structures of the other components of the server device 1, the multifunction device 2, and the terminal device 3, they can also be arbitrarily changed within the scope not departing from the gist of the present invention.

[0195] In addition, Figure 2 , Figure 3 , Figure 5 , Figure 6 , and Figure 8 The step units of the operations shown are units obtained by dividing according to the main processing contents for the sake of facilitating the understanding of the operations of the respective devices of the document determination system 1000. The present invention is not limited by the method or name of the division of the processing units. It can also be further divided into more step units according to the processing contents. In addition, one step unit can also be divided into containing more processes. In addition, the order of these steps can also be appropriately changed within the scope not hindering the gist of the present invention.

[0196] Reference Signs

[0197] 1... Server device (information processing device); 2... Multifunction device (printing device, reading device); 2A... First multifunction device (printing device, reading device); 2B... Second multifunction device (printing device, reading device); 2C... Third multifunction device (printing device, reading device); 3... Terminal device; 10... Server control unit; 11... Server communication unit; 20... Multifunction device control unit; 21... Multifunction device communication unit; 22... Printing unit; 23... Scanning unit; 24... Multifunction device input unit; 25... Multifunction device display unit; 30... Terminal control unit; 31... Terminal communication unit; 32... Terminal input unit; 33... Terminal display unit; 100... Server processor; 101... Server communication control unit; 102... Database processing unit; 103... Authenticity judgment unit; 110... Server storage unit (storage unit); 111... File data management DB; 200... Multifunction device processor; 201... Multifunction device communication control unit; 202... Printing control unit; 203... Scanning control unit; 204... Authentication unit; 205... Multifunction device registration unit; 206... File data request unit; 207... Print data generation unit; 208... Authenticity judgment request unit; 210... Multifunction device storage unit; 300... Terminal processor; 301... Terminal communication control unit; 302... Terminal registration unit; 310... Terminal storage unit; 1000... File judgment system; 1111... File ID (identification information); 1112... Split data (specific use data); 1113... Area data; 1114... File data; AP... Authentic printed matter; CD... Encoded image; NW... Communication network.

Claims

1. A document judgment system, comprising: An information processing device that stores document data; A printing device that generates a genuine printed matter, which is a genuine printed matter in which the document represented by the document data stored in the information processing device is printed, and at least a part of the document is printed in black, i.e., composite black, which is represented by printing materials of multiple colors; A reading device that reads a printed surface of a reading object including the genuine printed matter or a copied printed matter obtained by copying the genuine printed matter; Based on whether at least a part of the document represented by the reading data generated by the reading of the reading device is printed in the composite black, the information processing device judges whether the reading object read by the reading device is the genuine printed matter; The information processing device stores area data indicating an area printed in the composite black in the document; The printing device prints at least a part of the document in the composite black according to the area data to generate the genuine printed matter; Based on whether the document represented by the reading data is the document printed according to the stored area data, the information processing device judges whether the reading object read by the reading device is the genuine printed matter; When judging whether the reading object read by the reading device is the genuine printed matter, the information processing device sends judgment result information indicating the judgment result to the reading device; The reading device outputs the judgment result indicated by the judgment result information received from the information processing device; A coded image is printed on the genuine printed matter, and the coded image records specific use data used in specifying an area printed in the composite black; The reading device obtains the specific use data from the coded image represented by the reading data, and specifies an area printed in the composite black in the document printed on the reading object based on the obtained specific use data; Based on the specification result according to the specific use data and the area represented by the stored area data, the information processing device judges whether the reading object read by the reading device is the genuine printed matter.

2. The document judgment system according to claim 1, wherein: The information processing device stores the document data, the area data, and identification information for identifying the document data in a corresponding relationship; On the genuine printed matter, a coded image recording the identification information is printed; Based on whether the document represented by the reading data is the document printed according to the area data corresponding to the identification information recorded in the coded image represented by the reading data, the information processing device judges whether the reading object read by the reading device is the genuine printed matter.

3. A document judgment method, comprising the following steps, namely: Steps for generating a real printed matter, wherein, The real printed matter is a real printed matter that prints the document represented by the document data stored in the information processing device, and at least a part of the document is printed in black, i.e., composite black, which is represented by printing materials of multiple colors; A step of the reading device reading the printed surface of the reading object including the real printed matter or a copied printed matter obtained by copying the real printed matter; A step of determining whether the reading object read by the reading device is the real printed matter based on whether at least a part of the document represented by the reading data generated by the reading of the reading device is printed in the composite black; A step of storing, by the information processing device, area data representing an area printed in the composite black in the document; A step of printing at least a part of the document in the composite black according to the area data to generate the real printed matter; A step of the information processing device determining whether the reading object read by the reading device is the real printed matter based on whether the document represented by the reading data is the document printed according to the stored area data; A step of, when determining whether the reading object read by the reading device is the real printed matter, the information processing device sending determination result information representing the determination result to the reading device; A step of the reading device outputting the determination result represented by the determination result information received from the information processing device; A step of printing a coded image on the real printed matter, wherein the coded image records specific use data used in specifying an area printed in the composite black; A step of the reading device obtaining the specific use data from the coded image represented by the reading data and specifying an area printed in the composite black in the document printed on the reading object based on the obtained specific use data; A step of the information processing device determining whether the reading object read by the reading device is the real printed matter based on the specifying result according to the specific use data and the area represented by the stored area data; 4. An information processing device, comprising: A storage unit that stores document data; A authenticity determination unit that determines whether a reading object read by the reading device is a genuine printed matter based on whether at least a part of a document represented by reading data generated by reading by the reading device is printed in composite black, which is black represented by printing materials of multiple colors. Among them, The real printed matter is a real printed matter that prints the document represented by the document data stored in the storage unit, and at least a part of the document represented by the document data stored in the storage unit is printed in the composite black, The information processing device stores area data representing an area printed in the composite black in the document, The real printed matter is generated by printing at least a part of the document in the composite black according to the area data, The information processing device determines whether the reading object read by the reading device is the real printed matter based on whether the file represented by the read data is printed according to the stored area data. When determining whether the reading object read by the reading device is the real printed matter, the information processing device sends determination result information indicating the determination result to the reading device. The reading device outputs the determination result indicated by the determination result information received from the information processing device. The real printed matter is printed with a coded image, and the coded image records specific use data used in the specification of the area printed with the composite black. Through the reading device, the specific use data is obtained from the coded image represented by the read data, and the area printed with the composite black in the file printed on the reading object is specified based on the obtained specific use data. Through the real determination unit, it is determined whether the reading object read by the reading device is the real printed matter based on the specification result according to the specific use data and the area represented by the stored area data.

Images