Document judgment system, document judgment method, and information processing device

Abstract

To simply determine whether an object to be read is an authentic printed material.SOLUTION: A document determination system 1000 comprises: a server device 1 that stores document data 1114; a second multi-functional machine 2B that generates an authentic printed material that is an authentic printed material obtained by printing a document indicated by the document data 1114 stored by the server device 1 and printing at least part of the document with composite black being black represented by a plurality of inks; and a third multi-functional machine 2C that reads a print surface of an object to be read including the authentic printed matter and a copy printed material obtained by copying the authentic printed material. The server device 1 determines whether the object to be read read by the third multi-functional machine 2C is an authentic printed material based on the fact that at least part of the document indicated by the read data generated through reading of the third composite machine 2C is printed with composite black.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a document judgment system, a document judgment method, and an information processing device. [Background technology]

[0002] Conventionally, techniques for distinguishing between genuine documents and copies are known. Patent Document 1 describes a technique that enables the authenticity of a document to be confirmed by embedding a hash value generated from print data as a pattern and printing the embedded hash value. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-16934 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a technology for distinguishing between genuine documents and copies, there is a demand for a technology that can determine whether a document is genuine or not more simply than the technology described in Patent Document 1 and the like. [Means for solving the problem]

[0005] One aspect of solving the above problem is a document management system that includes an information processing device that stores document data, a printing device that generates an authentic printout, which is an authentic printout on which a document indicated by the document data stored in the information processing device is printed and at least a portion of the document is printed in composite black, a black color expressed using multiple colors of printing material, and a reading device that reads the printed surface of a reading object including the authentic printout and a copy printout made by copying the authentic printout, and the information processing device determines whether the reading object read by the reading device is the authentic printout based on whether at least a portion of the document indicated by the reading data generated by reading by the reading device is printed in composite black.

[0006] Another aspect for solving the above problem is a document determination method including the steps of generating an authentic printed matter, in which a document indicated by document data stored in an information processing device is printed and at least a portion of the document is printed in composite black, which is a black color expressed using multiple colors of printing material, a step of reading, by a reading device, the printed surface of a reading object including the authentic printed matter and a copy printed matter obtained by copying the authentic printed matter, and a step of determining whether the reading object read by the reading device is the authentic printed matter based on whether at least a portion of the document indicated by the reading data generated by the reading device is printed in composite black.

[0007] Yet another aspect of the invention that solves the above problem is an information processing device comprising: a memory unit that stores document data; and an authenticity determination unit that determines, based on whether at least a portion of a document indicated by read data generated by a reading device is printed in composite black, which is a black color expressed using multiple printing materials, whether the reading object read by the reading device is an authentic printed matter on which a document indicated by the document data stored in the memory unit is printed and at least a portion of the document indicated by the document data stored in the memory unit is printed in composite black. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing the configuration of a document determination system. [Diagram 2] 4 is a flowchart showing the operation of the document determination system. [Diagram 3] 13 is a flowchart showing a registration request information generating process. [Figure 4] FIG. 11 is a diagram for specifically explaining a registration request information generating process. [Diagram 5] 4 is a flowchart showing the operation of the document determination system. [Figure 6] 4 is a flowchart showing the operation of the document determination system. [Figure 7] FIG. 1 is a diagram showing an example of an authentic print. [Figure 8] 4 is a flowchart showing the operation of the document determination system. [Figure 9] FIG. 4 is a diagram showing a schematic diagram of scan resolution and ink dots. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] FIG. 1 is a diagram showing the configuration of a document determination system 1000. As shown in FIG. The document assessment system 1000 includes a server device 1, a first multifunction device 2A, a second multifunction device 2B, a third multifunction device 2C, and a terminal device 3. In the following description, when there is no need to distinguish between the first multifunction device 2A, the second multifunction device 2B, and the third multifunction device 2C, they will be referred to as "multifunction devices" and given the reference number "2."

[0010] The server device 1 corresponds to an example of an "information processing device." In this embodiment, the second multifunction device 2B corresponds to an example of a "printing device." In this embodiment, the third multifunction device 2C corresponds to an example of a "reading device."

[0011] Each of the multifunction machine 2 and the terminal device 3 is connected to a communication network NW and is communicatively connected to the server device 1. The communication network NW is a network configured with a public line network, a dedicated line, other communication lines, and various communication facilities, and the specific form is not limited. For example, the communication network NW may be a wide area network or a local network installed inside a building. The communication network NW may also be configured to include at least one of a wireless communication circuit and a wired communication circuit.

[0012] The multifunction device 2 is called an MFP (Multi Function Peripherals) and is a device having various functions such as a printing function, a scanning function, etc. The multifunction device 2 of this embodiment is equipped with a serial type inkjet head and performs printing using the inkjet head.

[0013] The first multifunction device 2A transmits document data 1114 to the server device 1, thereby registering the document data 1114 in the server device 1. The document data 1114 transmitted by the first multifunction device 2A is scanned data generated by a scan function of the first multifunction device 2A. An example of the data format of the scanned data is the Portable Document Format (PDF).

[0014] The second multifunction device 2B receives the document data 1114 registered in the server device 1 from the server device 1, prints the document indicated by the received document data 1114, and generates the authentic printed matter AP. The authentic printed matter AP is an authentic printed matter on which the document indicated by the document data 1114 generated by the second multifunction device 2B and registered in the server device 1 is printed. The authentic printed matter AP is printed with the document indicated 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 a black color expressed by multiple colors of ink. Examples of the combination of ink colors that make up composite black include CMYK, YK, and YMC. Here, C is cyan, M is magenta, Y is yellow, and K is black. The ink corresponds to an example of a "printing material."

[0015] The third multifunction device 2C reads the printed surface of the object to be read using the scan function, and requests the server device 1 to determine the authenticity of the object whose printed surface has been read. The authenticity determination requested by the third multifunction device 2C indicates whether the object whose printed surface has been read by the third multifunction device 2C is an authentic printed matter AP, or a duplicated printed matter that has been duplicated from the authentic printed matter AP. A duplicated printed matter is a printed matter obtained by a so-called copy function. Generally, a duplicated printed matter is printed in black using pure black or composite black. Note that pure black is a black color that is expressed using only K ink.

[0016] The terminal device 3 is a PC (Personal Computer). Although the terminal device 3 shown in FIG. 1 is a notebook PC, the terminal device 3 may be a desktop PC, a tablet PC, or a smartphone. The terminal device 3 transmits document data 1114 to the server device 1 to register the document data 1114 in the server device 1. The document data 1114 transmitted by the terminal device 3 is data stored in the terminal device 3, data stored in a device connected to the terminal device 3, or the like.

[0017] In response to a request from the second multifunction device 2B, the server device 1 transmits the document data 1114 to the second multifunction device 2B. In response to a request for authenticity determination from the third multifunction device 2C, the server device 1 determines whether the read object read by the third multifunction device 2C is an authentic printed matter AP or a duplicate printed matter.

[0018] The configuration of the multifunction device 2 will be described. In this embodiment, the first multifunction device 2A, the second multifunction device 2B, and the third multifunction device 2C have the same configuration. In Fig. 1, the configuration of the second multifunction device 2B is shown as a representative.

[0019] The multifunction device 2 includes a multifunction device control unit 20 , a multifunction device communication unit 21 , a printing unit 22 , a scanning unit 23 , a multifunction device input unit 24 , and a multifunction device display unit 25 .

[0020] The multifunction device control unit 20 includes a multifunction device processor 200, which is a processor that executes programs such as a CPU (Central Processing Unit) or an MPU (Micro-processing unit), and a multifunction device storage unit 210. The multifunction device control unit 20 controls each unit of the multifunction device 2 by the multifunction device processor 200 reading and executing the control program stored in the multifunction device storage unit 210. The multifunction device processor 200 executes the control program stored in the multifunction device storage unit 210, thereby functioning as a multifunction device communication control unit 201, a print control unit 202, a scan control unit 203, an authentication unit 204, a multifunction device registration unit 205, a document data request unit 206, a print data generation unit 207, and an authenticity determination request unit 208.

[0021] The multifunction device storage unit 210 includes a memory for storing programs executed by the multifunction device processor 200 and data processed by the multifunction device processor 200. The multifunction device storage unit 210 stores control programs executed by the multifunction device processor 200 and various other data. The multifunction device storage unit 210 includes a non-volatile storage area. The multifunction device storage unit 210 may also include a volatile storage area and constitute a work area for the multifunction device processor 200.

[0022] The MFP communication unit 21 is a communication interface equipped with a communication circuit, a connector, etc., and communicates with devices connected to the communication network NW according to a predetermined communication standard. The communication standard of the MFP communication unit 21 may be a wireless communication standard or a wired communication standard.

[0023] The printing unit 22 includes components related to printing, such as an inkjet head that ejects ink onto a print medium to form dots, a carriage that operates the inkjet head in a scanning direction, a carriage drive motor that drives the carriage, a transport unit that transports the print medium, and an ink supply unit that supplies ink to the inkjet head. Under the control of the multifunction device control unit 20, the printing unit 22 ejects ink from the nozzles of the inkjet head to form dots on the printing surface of the transported print medium, thereby printing on the print medium.

[0024] The scanning unit 23 includes a reading component such as a scanner that reads characters and images recorded on a printed matter. The scanning unit 23, for example, reads the recorded characters and images by applying light emitted from a light source to a reading target, and outputs image data obtained by reading to the multifunction device control unit 20. The multifunction device control unit 20 performs data processing such as RGB conversion and compression processing on the image data input from the scanning unit 23, and generates data in a predetermined format as read data.

[0025] The multifunction device input unit 24 includes input means such as an operation switch or a touch panel provided on the multifunction device 2, detects operations performed by the user on the input means, and outputs the operations to the multifunction device control unit 20. Based on the input from the multifunction device input unit 24, the multifunction device control unit 20 executes a process corresponding to the operation on the input means.

[0026] The multifunction device display unit 25 includes a display, and displays information on the display according to the control of the multifunction device control unit 20 .

[0027] The MFP processor 200 functions as a MFP communication control unit 201 , a print control unit 202 , a scan control unit 203 , an authentication unit 204 , a MFP registration unit 205 , a document data request unit 206 , a print data generation unit 207 , and an authenticity determination request unit 208 .

[0028] The multifunction device communication control unit 201 communicates with devices connected to the communication network NW via the multifunction device communication unit 21 .

[0029] The print control unit 202 controls the print unit 22 to print on the print medium.

[0030] The scan control unit 203 controls the scanning unit 23 to read characters and images from the reading target and generate read data.

[0031] The authentication unit 204 performs user authentication. For example, the authentication unit 204 receives a user's authentication ID (Identification) via the multifunction device input unit 24. If the received authentication ID indicates a legitimate user, the authentication unit 204 determines that the user authentication has been successful. On the other hand, if the received authentication ID does not indicate a legitimate user, the authentication unit 204 determines that the user authentication has failed.

[0032] The multifunction device registration unit 205 registers the document data 1114. When the multifunction device registration unit 205 receives a registration instruction from a user via the multifunction device input unit 24, 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 which is identification information of the document data 1114, divided data 1112, and area data 1113. The divided data 1112 and area data 1113 will be described later. The multifunction device registration unit 205 outputs the generated registration request information to the multifunction device communication control unit 201. As a result, the registration request information is transmitted to the server device 1 by the multifunction device communication control unit 201. The divided data 1112 corresponds to an example of "identification data."

[0033] Document data request unit 206 requests document data 1114 registered in server device 1. Document data request unit 206 generates document data request information for requesting document data 1114, and outputs the generated document data request information to multifunction device communication control unit 201. As a result, the document data request information is transmitted to server device 1 by multifunction device communication control unit 201.

[0034] The print data generating unit 207 generates print data to be processed by the print control unit 202. Details of the print data generating unit 207 will be described later. When the print data generating unit 207 generates the print data, it outputs the generated print data to the print control unit 202.

[0035] The authenticity determination request unit 208 requests an authenticity determination from the server device 1. The authenticity determination request unit 208 generates authenticity determination request information requesting an authenticity determination, and outputs the generated authenticity determination request information to the multifunction device communication control unit 201. As a result, the authenticity determination request information is transmitted to the server device 1 by the multifunction device communication control unit 201.

[0036] Next, the terminal device 3 will be described. 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.

[0037] The terminal control unit 30 includes a terminal processor 300, which is a processor that executes programs such as a CPU or an MPU, and a terminal storage unit 310. The terminal control unit 30 controls each unit of the terminal device 3 by the terminal processor 300 reading and executing the control program stored in the terminal storage unit 310. The terminal processor 300 executes the control program stored in the terminal storage unit 310, thereby functioning as a terminal communication control unit 301 and a terminal registration unit 302.

[0038] The terminal storage unit 310 includes a memory for storing programs executed by the terminal processor 300 and data processed by the terminal processor 300. The terminal storage unit 310 stores the control programs executed by the terminal processor 300, the document data 1114, and various other data. The terminal storage unit 310 includes a non-volatile storage area. The terminal storage unit 310 may also include a volatile storage area and constitute a work area for the terminal processor 300.

[0039] The terminal communication unit 31 is a communication interface equipped with a communication circuit, a connector, etc., and communicates with devices connected to the communication network NW in accordance with a predetermined communication standard. The communication standard of the terminal communication unit 31 may be a wireless communication standard or a wired communication standard.

[0040] The terminal input unit 32 is an input interface that connects to input means such as an operation switch provided on the terminal device 3, a panel with a touch input function, a mouse, a keyboard, etc., detects operations on the input means by the user, and outputs the detection result to the terminal control unit 30. Based on the input from the terminal input unit 32, the terminal control unit 30 executes a process corresponding to the operation on the input means.

[0041] The terminal display unit 33 includes a display and displays information on the display according to the control of the terminal control unit 30.

[0042] The terminal processor 300 functions as a terminal communication control unit 301 and a terminal registration unit 302 .

[0043] The terminal communication control unit 301 communicates with devices connected to the communication network NW via the terminal communication unit 31.

[0044] The terminal registration unit 302 registers the document data 1114. When the terminal registration unit 302 receives a registration instruction from a user via the terminal input unit 32, it generates registration request information indicating a registration request for the document data 1114. The registration request information generated by the terminal registration unit 302 includes the document data 1114 to be registered, the document ID 1111, the divided data 1112, and the area data 1113, similar to the registration request information generated by the multifunction device registration unit 205. The terminal registration unit 302 outputs the generated registration request information to the terminal communication control unit 301. As a result, the registration request information is transmitted to the server device 1 by the terminal communication control unit 301.

[0045] Next, the server device 1 will be described. The server device 1 includes a server control unit 10 and a server communication unit 11.

[0046] The server control unit 10 includes a server processor 100, which is a processor that executes programs such as a CPU or MPU, and a server storage unit 110, and controls each unit of the server device 1. The server control unit 10 controls each unit of the server device 1 by the server processor 100 reading out a 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 an authenticity determination unit 103. The server storage unit 110 corresponds to an example of a "storage unit."

[0047] The server storage unit 110 has a memory for storing programs executed by the server processor 100 and data processed by the server processor 100. The server storage unit 110 stores the control programs executed by the server processor 100, a document data management DB 111, and various other data. The server storage unit 110 has a non-volatile storage area. The server storage unit 110 may also have a volatile storage area and constitute a work area for the server processor 100.

[0048] The document data management DB 111 is a database that manages document data 1114 received as a registration target from the multifunction device 2 and the terminal device 3. One record stored in the document data management DB 111 includes a document ID 1111, divided data 1112, area data 1113, and document data 1114.

[0049] The server communication unit 11 is a communication interface that includes a communication circuit, connector, and the like that conforms to a predetermined communication standard, and communicates with the multifunction device 2 and the terminal device 3 under the control of the server control unit 10.

[0050] As described above, the server processor 100 functions as the server communication control unit 101, the database processing unit 102, and the authenticity determination unit 103.

[0051] The server communication control unit 101 communicates with devices connected to the communication network NW via the server communication unit 11.

[0052] The database processing unit 102 executes processing relating to the document data management DB 111 .

[0053] The authenticity determination unit 103 performs authenticity determination to determine whether the printed matter AP is an authentic print or a copy print.

[0054] The operation of the document determination system 1000 will be described. First, the operation of the document determination system 1000 related to the registration of the document data 1114 will be described.

[0055] 2 is a flowchart showing the operation of the document determination system 1000. In FIG. 2, a flowchart FA shows the operation of the first multifunction device 2A, and a flowchart FB shows the operation of the server device 1.

[0056] The multifunction device registration unit 205 determines whether or not an instruction to register the document data 1114 has been accepted from the user via the multifunction device input unit 24 (step SA1).

[0057] When it is determined that the instruction to register the document data 1114 has not been accepted from the user (step SA1: NO), the multifunction device registration unit 205 performs the determination in step SA1 again.

[0058] On the other hand, if the MFP registration unit 205 determines that it has received an instruction to register the document data 1114 from the user (step SA1: YES), the scan control unit 203 of the first MFP 2A controls the scan unit 23 to acquire the read data (step SA2).

[0059] Next, the MFP registration section 205 of the first MFP 2A performs a registration request information generating process to generate registration request information (step SA3).

[0060] FIG. 3 is a flowchart FC showing the registration request information generating process.

[0061] The multifunction device registration unit 205 divides the image area GA of the document indicated by the document data 1114 to be registered by a predetermined number of divisions both vertically and horizontally (step SC1). As a result, the image area GA of the document is divided into a grid pattern. Hereinafter, each divided area will be referred to as a "divided area" and will be marked with "BA."

[0062] Next, the MFP registration unit 205 identifies one divided area BA (step SC2), and determines whether the black color in the identified divided area BA is to be printed in composite black or pure black (step SC3).

[0063] In step SC3, for example, if the divided area BA contains a predetermined number or more of black pixels, the multifunction device registration unit 205 determines that the divided area BA to be judged will be printed in pure black, and if the divided area BA contains less than the predetermined number of black pixels, it determines that the divided area BA to be judged will be printed in composite black.

[0064] When the multifunction device registration unit 205 determines that black is to be printed in pure black for the divided area BA identified in step SC2 (step SC3: pure black), it assigns 1-bit data indicating "1" to the divided area BA identified in step SC2 (step SC4). The 1-bit data indicating "1" is data indicating that the assigned divided area BA is a pure black area in which black is printed in pure black.

[0065] On the other hand, if the MFP registration unit 205 determines that black is to be printed in composite black for the divided area BA identified in step SC2 (step SC3: composite black), it assigns 1-bit data indicating "0" to the divided area BA identified in step SC2 (step SC5). The 1-bit data indicating "0" is data indicating that the assigned divided area BA is a composite black area in which black is printed in composite black.

[0066] After performing the process of step SC4 or step SC5, the multifunction device registration section 205 determines whether or not the process of step SC4 or step SC5 has been performed for all divided areas BA (step SC6).

[0067] If the multifunction device 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), the multifunction device registration unit 205 returns the processing to step SC2 and performs the processing of step SC2 and subsequent steps on the unidentified divided areas BA.

[0068] When the multifunction device registration unit 205 determines that the process of step SC4 or step SC5 has been performed on 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 indicating "1" is assigned (step SC7). For example, the number of selected areas is about 50 percent of the total number of divided areas BA to which 1-bit data indicating "1" is assigned.

[0069] Next, the multifunction device registration section 205 changes the 1-bit data assigned to each of the divided areas BA selected in step SC7 to 1-bit data indicating "0" (step SC8).

[0070] Next, the MFP 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 pure black area, and is data in which the assigned 1-bit data is arranged in a predetermined order.

[0071] Next, the multifunction device 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 divided in step SC1, area data 1113 generated in step SC9, the read data acquired in step SA2 as document data 1114 to be registered, and a document ID 1111.

[0072] FIG. 4 is a diagram for specifically explaining the registration request information generating process. In the case of FIG. 4, in step SC1, the multifunction device registration unit 205 divides the image area GA of the document indicated by the document data 1114 to be registered into a total of 20 divided areas BA, 5 vertically and 4 horizontally.

[0073] 4, the divided area BA that is I-th from the top and J-th from the left in the figure will be expressed as a divided area BA-IJ, where I and J are integers of 1 or more.

[0074] In the case of Figure 4, the multifunction device registration unit 205 performs steps SC2, SC3, SC4, SC5, and SC6, and assigns 1-bit data indicating "1" to the divided areas BA other than divided areas BA-24 and BA-44, and assigns 1-bit data indicating "0" to divided areas BA-24 and BA-44.

[0075] In the case of Fig. 4, the multifunction device 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 in step SC7. Then, in the case of Fig. 4, the multifunction device 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 indicating "1" to 1-bit data indicating "0" in step SC8.

[0076] In Fig. 4, the entire area of ​​the divided area BA to which 1-bit data indicating "1" is assigned after the processing of step SC8 is colored for convenience. As shown in Fig. 4, after the processing of step SC8, 1-bit data indicating "1" is assigned to each of the divided areas BA-11, BA-13, BA-21, BA-31, BA-33, BA-41, BA-51, BA-52, BA-53, and BA-54. Also, as shown in Fig. 4, after the processing of step SC8, 1-bit data indicating "0" is assigned to each of the divided areas BA-12, BA-14, BA-22, BA-23, BA-24, BA-32, BA-34, BA-42, BA-43, and BA-44.

[0077] In the case of Fig. 4, the multifunction device registration unit 205 generates area data 1113 described in row-by-row order from top to bottom in the figure, and in row-by-row order from left to right in the figure. That is, in the case of Fig. 4, the multifunction device registration unit 205 generates area data 1113 indicating "(1, 0, 1, 0), (1, 0, 0, 0), (1, 0, 1, 0), (1, 0, 0, 0), (1, 1, 1, 1)."

[0078] In the case of Figure 4, the multifunction device 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 indicating 5 vertical divisions and 4 horizontal divisions.

[0079] Returning to the explanation of the flowchart FA shown in FIG. 2, the MFP communications control unit 201 of the first MFP 2A transmits the registration request information generated in step SA3 to the server device 1 (step SA4).

[0080] As shown in the flow chart FB, the server communication control unit 101 of the server device 1 receives registration request information from the first multifunction device 2A (step SB1).

[0081] 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 document data management DB 111 (step SB2).

[0082] In the document determination system 1000, the terminal device 3 can also register the document data 1114. 5 is a flowchart showing the operation of the document determination system 1000. In FIG.

[0083] The terminal registration unit 302 of the terminal device 3 determines whether or not an instruction to register the document data 1114 has been accepted from the user via the terminal input unit 32 (step SD1).

[0084] When the terminal registration unit 302 determines that the instruction to register the document data 1114 has not been accepted from the user (step SD1: NO), the terminal registration unit 302 performs the determination in step SD1 again.

[0085] On the other hand, if the terminal registration unit 302 determines that an instruction to register the document data 1114 has been received from the user (step SD1: YES), it performs a registration request information generating process (step SD2).

[0086] The registration request information generating process in step SD2 will be described with reference to the flowchart FC in FIG.

[0087] The terminal registration unit 302 divides the image area GA of the document indicated by the document data 1114 to be registered by a predetermined number of divisions vertically and horizontally (step SC1). Examples of the document data 1114 divided by the terminal registration unit 302 include data stored in the terminal storage unit 310 and data stored in a device connected to the terminal device 3.

[0088] Next, the terminal registration unit 302 identifies one divided area BA (step SC2), and determines whether the black color is printed in composite black or pure black for the identified divided area BA (step SC3).

[0089] If the terminal registration unit 302 determines that black should be printed in pure black for the divided area BA identified in step SC2 (step SC3: pure black), it assigns 1 bit of data indicating "1" to the divided area BA identified in step SC2 (step SC4).

[0090] On the other hand, if the terminal registration unit 302 determines that black is to be printed in composite black for the divided area BA identified in step SC2 (step SC3: Composite black), it assigns 1 bit of data indicating "0" to the divided area BA identified in step SC2 (step SC4).

[0091] After performing the process of step SC4 or step SC5, the terminal registration unit 302 determines whether or not the process of step SC4 or step SC5 has been performed for all divided areas BA (step SC6).

[0092] If the terminal registration unit 302 determines that the processing of step SC4 or step SC5 has not been performed for all divided areas BA (step SC6: NO), the terminal registration unit 302 returns the processing to step SC2 and performs the processing of step SC2 and subsequent steps on the unspecified divided area BA.

[0093] If the terminal registration unit 302 determines that it has performed processing of step SC4 or step SC5 for all divided areas BA (step SC6: YES), it randomly selects one or more divided areas BA from the divided areas BA to which one bit of data indicating "1" is assigned (step SC7).

[0094] Next, the terminal registration section 302 changes the assigned data for each of the divided areas BA selected in step SC7 from 1-bit data indicating "1" to 1-bit data indicating "0" (step SC8).

[0095] Next, the terminal registration unit 302 generates area data 1113 (step SC9), and generates registration request information (step SC10). The registration request information generated by the terminal registration unit 302 includes division data 1112 indicating the number of vertical and horizontal divisions in the division in step SC1, area data 1113 generated in step SC9, document data 1114 stored in the terminal storage unit 310 as document data 1114 to be registered, and a document ID 1111.

[0096] Returning to the explanation of the flowchart FD shown in FIG. 5, the terminal communication control section 301 transmits the registration request information generated in step SD2 to the server device 1 (step SD3).

[0097] As shown in flow chart FE, the server communication control unit 101 receives registration request information from the terminal device 3 (step SD1).

[0098] 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 document data management DB 111 (step SD2).

[0099] Next, the operation of the document determination system 1000 involved in generating the authentic print matter AP will be described. 6 is a flowchart showing the operation of the document determination system 1000. In FIG. 6, a flowchart FF shows the operation of the second multifunction device 2B, and a flowchart FG shows the operation of the server device 1.

[0100] The authentication unit 204 of the second multifunction device 2B performs user authentication (step SF1). If the user authentication fails, the multifunction device processor 200 of the second multifunction device 2B ends the process. If the user authentication is successful, the multifunction device processor 200 of the second multifunction device 2B proceeds to step SF2.

[0101] Document data request unit 206 of second MFP 2B receives, via MFP input unit 24, an instruction to designate document data 1114 to be printed and a print instruction (step SF2).

[0102] Upon receiving the instruction to specify document data 1114 and the print instruction, document data request unit 206 generates document data request information (step SF3). The document data request information generated in step SF3 includes document ID 1111 of document data 1114 specified by the user.

[0103] The MFP communications control unit 201 of the second MFP 2B transmits the document data request information generated in step SF3 to the server device 1 (step SF4).

[0104] As shown in a flow chart FG, the server communication control unit 101 of the server device 1 receives document data request information from the second multifunction device 2B (step SG1).

[0105] The database processing unit 102 identifies 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).

[0106] Next, server communication control unit 101 transmits document ID 1111, divided data 1112, area data 1113, and document data 1114 contained in the record identified in step SG2 to second multifunction device 2B as a response to the document data request information (step SG3).

[0107] As shown in flow chart FF, the multifunction device communications control unit 201 receives the document ID 1111, the divided data 1112, the area data 1113, and the document data 1114 from the server device 1 (step SF5).

[0108] The print data generating unit 207 generates print data based on the document ID 1111, the divided data 1112, the area data 1113, and the document data 1114 received in step SF5 (step SF6).

[0109] Next, the print control unit 202 of the second multifunction device 2B performs printing based on the print data generated in step SF6, and generates an authentic print AP (step SF7).

[0110] FIG. 7 is a diagram showing an example of the authentic printed matter AP. FIG. 7 illustrates an example of an authentic print AP on which the document shown in FIG. 4 is printed based on the division data 1112 and area data 1113 shown in FIG.

[0111] In Fig. 7, a dotted line is superimposed on the authentic printed matter AP. The dotted line shown in Fig. 7 is a line for convenience to indicate an area in the printing area IA of the authentic printed matter AP that corresponds to one divided area BA, and is not actually printed on the authentic printed matter AP.

[0112] In the following description, an area in the print area IA that corresponds to one divided area BA is referred to as a "corresponding area" and is given the symbol "TA." 7, the Lth corresponding area TA from the top and the Nth corresponding area TA from the left in the figure will be expressed as a corresponding area TA-LN, where L and N are integers of 1 or more.

[0113] 7, the corresponding area TA-LN corresponds to the divided area BA-IJ whose code includes "IJ" with the same numerical value as "LN" included in the code. For example, the corresponding area TA-11 corresponds to the divided area BA-11, but does not correspond to any divided area BA other than the divided area BA-11.

[0114] In the image area GA of the document shown in Fig. 4, one bit of data indicating "1" is assigned to each of the divided areas BA-11, BA-13, BA-21, BA-31, BA-33, BA-41, BA-51, BA-52, BA-53, and BA-54. Therefore, in the authentic print AP shown in Fig. 7, black is printed in pure black in each of the corresponding areas TA-11, TA-13, TA-21, TA-31, TA-33, TA-41, TA-51, TA-52, TA-53, and TA-54.

[0115] In the image area GA shown in Fig. 4, 1-bit data indicating "0" is assigned to each of the divided areas BA-12, BA-14, BA-22, BA-23, BA-24, BA-32, BA-34, BA-42, BA-43, and BA-44. Therefore, in the authentic printed matter AP shown in Fig. 7, black is printed in composite black in each of the corresponding areas TA-12, TA-14, TA-22, TA-23, TA-42, TA-32, TA-34, TA-42, TA-43, and TA-44.

[0116] 7, the print data generating unit 207 performs various processes such as color conversion, halftone processing, and rasterization on the document data 1114 to generate print data for printing black in pure black in each of the corresponding areas TA-11, TA-13, TA-21, TA-31, TA-33, TA-41, TA-51, TA-52, TA-53, and TA-54. Also, when generating the authentic print AP shown in FIG. 7, the print data generating unit 207 performs various processes such as color conversion, halftone processing, and rasterization on the document data 1114 to generate print data for printing black in composite black in each of the corresponding areas TA-12, TA-14, TA-22, TA-23, TA-42, TA-32, TA-34, TA-42, TA-43, and TA-44.

[0117] 7, a code image CD is printed in a corresponding area TA-54 on the genuine printed matter AP. The code image CD is, for example, a QR code (registered trademark). A document ID 1111 and divided data 1112 are recorded in the code image CD printed on the genuine printed matter AP.

[0118] The print data generation unit 207 generates a code image CD in which the document ID 1111 and the divided data 1112 are recorded, generates image data in which the code image CD is superimposed on the divided area BA-54 of the image area GA of the document, and generates print data to print the image data.

[0119] The position where the code image CD is printed on the genuine print AP is not limited to the lower right position as shown in FIG. 7, but may be any position.

[0120] Next, the operation of the document determination system 1000 relating to authenticity determination will be described. 8 is a flowchart showing the operation of the document determination system 1000. In Fig. 8, a flowchart FH shows the operation of the third multifunction machine 2C, and a flowchart FI shows the operation of the server device 1.

[0121] As shown in a flow chart FH, the authenticity determination request section 208 of the third multifunction device 2C determines whether or not an instruction to execute an authenticity determination has been received from the user via the multifunction device input section 24 (step SH1).

[0122] When the authenticity determination requesting unit 208 of the third multifunction device 2C determines that an instruction to execute the authenticity determination has not been received from the user (step SH1: NO), it performs the determination in step SH1 again.

[0123] When the authenticity determination request unit 208 determines that an instruction to perform authenticity determination has been received from the user (step SH1: YES), the scan control unit 203 of the third multifunction device 2C scans the reading target set in the third multifunction device 2C with a scanning resolution for authenticity determination (step SH2). The scanning resolution for authenticity determination is a resolution of 1200 dpi or more.

[0124] FIG. 9 is a diagram showing a schematic diagram of scan resolution and ink dots.

[0125] The composite black dot D1 shown in FIG. 9 is an example of a dot formed by CMYK dots. The composite black dot D1 is a dot formed by overlapping CMYK dots. However, in composite black printing, the CMYK dots often do not completely overlap due to various factors such as the size of the ink, the type of ink, the moving speed of the carriage, and the distance between the nozzle face of the inkjet and the printing surface of the printing medium. Therefore, as shown in FIG. 9, CMYK dots are formed around the composite black dot D1. FIG. 9 illustrates a case where a cyan dot D2, a magenta dot D3, and a yellow dot D4 are formed around the composite black dot D1.

[0126] In Fig. 9, first resolution areas KA1, which are schematic representations of scan resolution, are arranged in a lattice pattern. The first resolution areas KA1 indicate a scan resolution of 1200 dpi. Therefore, in Fig. 9, an area in which the first resolution areas KA1 are arranged two by two adjacently on the top, bottom, left and right indicates a scan resolution of 600 dpi. Hereinafter, this area will be referred to as the "second resolution area."

[0127] In FIG. 9, when the scan resolution is 1200 dpi, the first resolution area KA1-1 among the multiple first resolution areas KA1 is almost entirely filled with cyan dots D1. In other words, the read data generated by scanning with a scan resolution of 1200 dpi is data in which the cyan dots D2 are read as cyan color. On the other hand, when the scan resolution is 600 dpi, the second resolution area KA2 including the first resolution area KA1-1 includes composite black dots D1 in addition to the cyan dots D2. In the second resolution area KA2 shown in FIG. 9, the entire area is filled with composite black dots D1, more than the cyan dots D2. In other words, the read data generated by scanning with a scan resolution of 600 dpi may be data in which the cyan dots D1 are read as black.

[0128] As explained with reference to Figure 9, by setting the scan resolution for authenticity determination to 1200 dpi, the scan control unit 203 can read the colors of the CMY dots formed in a part of a document as the appropriate color, even if that part is printed in composite black.

[0129] Returning to the explanation of the flowchart in FIG. 8, the authenticity judgment request unit 208 acquires the document ID 1111 and the divided data 1112 from the code image CD indicated by the read data obtained by the scan in step SH2 (step SH3).

[0130] Next, the authenticity judgment request unit 208 divides the image area GA of the document indicated by the read data obtained by scanning in step SH2 according to the number of vertical and horizontal divisions indicated by the division data 1112 acquired in step SH3 (step SH4).

[0131] Next, the authenticity determination request unit 208 determines whether each of the divided areas BA divided in step SH4 is a composite black area or a pure black area (step SH5). If the authenticity determination request unit 208 can recognize any of the colors CMY and cannot recognize any colors other than white, it determines it as a composite black area, and if it can recognize only black, it determines it as a pure black area.

[0132] Next, the authenticity determination request unit 208 assigns 1 bit of data indicating "0" to each area identified as a pure black area, and assigns 1 bit of data indicating "1" to each area identified as a composite black area (step SH6).

[0133] As described above, black is generally printed in pure black or composite black on a printed copy. Therefore, when information is printed in black only on a printed copy, the authenticity determination request unit 208 assigns 1-bit data indicating "1" or 1-bit data indicating "0" to all of the divided areas BA divided in step SH4.

[0134] Next, the authenticity determination request unit 208 generates area data 1113 in which the 1-bit data allocated in step SH6 is described in the same order as the 1-bit data described in the area data 1113 generated by the multifunction device registration unit 205 and the terminal registration unit 302 (step SH7). Note that the area data 1113 generated in step SH7 includes the identification result of step SH5.

[0135] Next, the authenticity determination request unit 208 generates authenticity determination request information (step SH8). The authenticity determination request information generated in step SH8 includes the document ID 1111 acquired in step SH3 and the area data 1113 generated in step SH7.

[0136] The MFP communication control section 201 of the third MFP 2C transmits the authenticity determination request information generated by the authenticity determination request section 208 to the server device 1 (step SH9).

[0137] As shown in a flow chart FI, the server communication control unit 101 of the server device 1 receives authenticity determination request information from the third multifunction device 2C (step SI1).

[0138] Next, the database processing unit 102 identifies a record having the document ID 1111 included in the authenticity determination request information received in step SI1 from the document data management DB 111 (step SI2).

[0139] Next, the authenticity determination unit 103 performs authenticity determination based on the area data 1113 included in the authenticity determination request information received in step SI1 and the area data 1113 included in the record identified in step SI2 (step SI3).

[0140] In step SI3, the authenticity determination unit 103 determines that the scanned object is an authentic printed matter AP if the number and the order of "1" and "0" of the 1-bit data indicated by the two area data 1113 to be compared match. On the other hand, the authenticity determination unit 103 determines that the scanned object is a duplicated printed matter if at least one of the number and the order of "1" and "0" of the 1-bit data indicated by the two area data 1113 to be compared do not match. This determination corresponds to a determination of whether the document indicated by the read data is a document printed according to the area data 1113. This determination also corresponds to a determination based on the identification result based on the division data 1112 and the area indicated by the area data 1113.

[0141] Next, the authenticity determination unit 103 generates authenticity determination result information indicating the authenticity determination result (step SI4). The authenticity determination result information indicates a determination result indicating that the printed matter AP is authentic, or a determination result indicating that the printed matter AP is a copy.

[0142] 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).

[0143] As shown in a flow chart FH, the MFP communications control unit 201 of the third MFP 2C receives the authenticity determination result information from the server device 1 (step SH10).

[0144] Next, the MFP processor 200 of the third MFP 2C outputs the authenticity determination result indicated by the authenticity determination result information received in step SH10 (step SH11).

[0145] The notification in step SH11 may be output by display or by printing.

[0146] As described above, the document determination system 1000 includes the server device 1 that stores the document data 1114, the second multifunction device 2B that generates an authentic printed matter AP, which is an authentic printed matter on which a document indicated 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, which is a black color expressed by multiple color inks, and the third multifunction device 2C that reads the printed surface of a reading target including the authentic printed matter AP and a copy printed matter obtained by copying the authentic printed matter AP. The server device 1 determines whether the reading target read by the third multifunction device 2C is an authentic printed matter AP based on whether at least a part of the document indicated by the read data generated by the third multifunction device 2C is printed in composite black.

[0147] According to this, based on whether a part of the document printed on the read target read by the third multifunction device 2C is printed in composite black, it can be determined whether the read target read by the third multifunction device 2C is a genuine printed matter AP. Therefore, the document determination system 1000 can easily determine whether the read target is a genuine printed matter AP or not without performing a calculation based on a hash function, for example.

[0148] The server device 1 stores area data 1113 indicating an area to be printed in composite black in a document indicated by stored document data 1114. The second MFP 2B prints at least a portion of the document in composite black in accordance with the area data 1113 to generate an authentic printed matter AP. The server device 1 determines whether the read target read by the third MFP 2C is an authentic printed matter AP based on whether the document indicated by the read data of the third MFP 2C is a document printed in accordance with the stored area data 1113.

[0149] According to this, since it is possible to determine whether or not the document is genuine printed matter AP based on whether it is a document printed in accordance with the area data 1113 stored in the server device 1, it is possible to accurately determine whether or not the read object read by the third multifunction device 2C is genuine printed matter AP. Therefore, the document determination system 1000 can simply and accurately determine whether or not the document is genuine printed matter AP.

[0150] A code image CD having recorded thereon divided data 1112 used to identify an area printed in composite black is printed on the genuine printed matter AP. The second multifunction device 2B acquires the divided data 1112 from the code image CD indicated by the read data generated by reading by the second multifunction device 2B, and identifies an area printed in composite black in the document printed on the read target based on the acquired divided data 1112. The server device 1 determines whether the read target read by the third multifunction device 2C is the genuine printed matter AP based on the identification result based on the divided data 1112 and the area indicated by the stored area data 1113.

[0151] This makes it possible to accurately determine whether the document indicated by the read data is a document printed in accordance with the area data 1112, and therefore makes it possible to more accurately determine whether the document is a genuine printed matter AP. Therefore, the document determination system 1000 can easily and more accurately determine whether the document is a genuine printed matter AP.

[0152] The server device 1 stores document data 1114, area data 1113, and a document ID 1111 that identifies the document data 1114 in association with each other. A code image CD in which the document ID 1111 is recorded is printed on the genuine printed matter AP. The server device 1 determines whether the object read by the third multifunction device 2C is the genuine printed matter AP or not, based on whether the document indicated by the read data of the third multifunction device 2C is a document printed in accordance with area data 1113 corresponding to the document ID 1111 recorded in the code image CD indicated by the read data.

[0153] According to this, since it is possible to determine whether or not each piece of document data 1114 is a genuine printed matter AP, it is possible to accurately determine whether or not the object read by the third multifunction device 2C is a genuine printed matter AP for each piece of document data 1114. Therefore, the document determination system 1000 can simply and accurately determine whether or not each piece of document data 1114 is a genuine printed matter AP.

[0154] When the server device 1 determines whether the read target read by the third multifunction device 2C is a genuine printed matter AP, it transmits determination result information indicating the determination result to the third multifunction device 2C. The third multifunction device 2C outputs the determination result indicated by the determination result information received from the server device 1.

[0155] According to this, the user can recognize the judgment result in the third multifunction device 2C that reads the judgment target to determine whether the judgment target is genuine or not. Therefore, the user can recognize the judgment result without operating a device other than the device that read the judgment target. In other words, the document judgment system 1000 can improve the convenience for the user.

[0156] The document determination method realized by the document determination system 1000 includes the steps of generating an authentic printed matter AP, which is an authentic printed matter in which a document indicated by document data 1114 stored in the server device 1 is printed and at least a portion of the document is printed in composite black, a black color expressed with multiple colors of ink, a step of a third multifunction device 2C reading the printed surface of the reading object including the authentic printed matter AP and a copy printed matter, and a step of determining whether the reading object read by the third multifunction device 2C is an authentic printed matter AP based on whether at least a portion of the document indicated by the read data obtained by reading by the third multifunction device 2C is printed in composite black.

[0157] According to this, the same effects as those of the document determination system 1000 are achieved.

[0158] The server device 1 includes a server memory unit 110 that stores document data 1114, and an authenticity determination unit 103 that determines, based on whether at least a portion of the document indicated by the read data generated by reading by the third multifunction device 2C is printed in composite black, whether the read object read by the third multifunction device 2C is a genuine printed matter AP, which is a printed matter on which a document indicated by the document data 1114 stored in the server memory unit 110 is printed and which is a genuine printed matter in which at least a portion of the document indicated by the document data 1114 stored in the server memory unit 110 is printed in composite black.

[0159] According to this, the same effects as those of the document determination system 1000 are achieved.

[0160] The above-described embodiment merely shows one aspect of the present invention, and any modification and application are possible within the scope of the present invention.

[0161] In the above-described embodiment, the first multifunction device 2A is exemplified as the multifunction device 2 that registers the document data 1114 in the server device 1. However, the multifunction device 2 that registers the document data 1114 in the server device 1 is not limited to the first multifunction device 2A, and may be the second multifunction device 2B or the third multifunction device 2C.

[0162] In the above-described embodiment, the second multifunction device 2B is exemplified as the multifunction device 2 that generates the genuine printed matter AP. However, the multifunction device 2 that generates the genuine printed matter AP is not limited to the second multifunction device 2B, and may be the first multifunction device 2A or the third multifunction device 2C. In this case, the first multifunction device 2A or the third multifunction device 2C corresponds to an example of a "printing device."

[0163] In the above-described embodiment, the third multifunction device 2C is exemplified as the multifunction device 2 that requests the authenticity determination. However, the multifunction device 2 that requests the authenticity determination is not limited to the third multifunction device 2C, and may be the first multifunction device 2A or the second multifunction device 2B. In this case, the first multifunction device 2A or the second multifunction device 2B corresponds to an example of a "reading device."

[0164] In the above-described embodiment, when the multifunction device 2 functions as a “printing device”, the multifunction device processor 200 only needs to function as at least a multifunction device communication control unit 201, a print control unit 202, a scan control unit 203, an authentication unit 204, a document data request unit 206, and a print data generation unit 207.

[0165] In the above-described embodiment, when the multifunction device 2 functions as a “reading device”, the multifunction device processor 200 only needs to function as at least the multifunction device communication control unit 201, the print control unit 202, the scan control unit 203, and the authenticity determination request unit 208.

[0166] In the above embodiment, the number of divisions in step SC1 is not limited to 5 vertical divisions and 4 horizontal divisions. In step SC1, the image area GA of the document may be further divided.

[0167] In the above-described embodiment, the serial inkjet method is exemplified as the printing method of the multifunction device 2, but the printing method of the multifunction device 2 may be a line inkjet method. Furthermore, the printing method of the multifunction device 2 is not limited to the inkjet method, and may be another printing method such as an electrophotographic method using toner. For example, when the printing method is an electrophotographic method, the toner corresponds to an example of the printing material.

[0168] In the above-described embodiment, the multifunction machine 2 is exemplified as the printing device, but the printing device is not limited to the multifunction machine 2, and may be a printing device such as a printer that does not have a scanning function.

[0169] In addition, the functions of the server processor 100, the multifunction device processor 200, and the terminal processor 300 may be realized by one or more processors or semiconductor chips.

[0170] Moreover, each unit shown in FIG. 1 is an example, and the specific implementation form is not particularly limited. In other words, it is not necessarily necessary to implement hardware corresponding to each unit individually, and it is of course possible to configure the functions of each unit by executing a program by one processor. Also, some of the functions realized by software in the above-mentioned embodiment may be hardware, or some of the functions realized by hardware may be software. In addition, the specific detailed configurations of each of the other units of the server device 1, the multifunction device 2, and the terminal device 3 may also be changed arbitrarily without departing from the spirit of the present invention.

[0171] In addition, the step units of the operation shown in Figures 2, 3, 5, 6, and 8 are divided according to the main processing contents in order to facilitate understanding of the operation of each device of the document determination system 1000, and the present invention is not limited by the manner in which the processing units are divided or the names thereof. The processing units may be divided into more step units according to the processing contents. Furthermore, one step unit may be divided so as to include more processing. Furthermore, the order of the steps may be appropriately changed within a range that does not impede the spirit of the present invention. [Explanation of symbols]

[0172] 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 determination unit, 110...server memory unit (storage memory unit), 111...document data management DB, 200...multifunction device processor, 201...multifunction device communication control unit, 202...print control unit, 203...scan control unit, 204...authentication unit, 205...multifunction device registration unit, 206...document data request unit, 207...print data generation unit, 208...authentication determination request unit, 210...multifunction device memory unit, 300...terminal processor, 301...terminal communication control unit, 302...terminal registration unit, 310...terminal memory unit, 1000...document determination system, 1111...document ID (identification information), 1112...divided data (identification data), 1113...area data, 1114...document data, AP...genuine printed matter, CD...code image, NW...communication network.

Claims

1. an information processing device that stores document data; a printing device that generates an authentic printed matter in which a document indicated by the document data stored in the information processing device is printed and at least a part of the document is printed in composite black, which is a black color expressed by a plurality of colors of printing materials; a reading device for reading a printed surface of a reading target which is the genuine printed matter or a copy printed matter obtained by copying the genuine printed matter; the information processing device determines whether the object read by the reading device is the genuine printed matter based on whether at least a portion of the document indicated by the read data generated by the reading device is printed in the composite black; When the information processing device determines whether the read object read by the reading device is the genuine printed matter, the information processing device transmits determination result information indicating a determination result to the reading device; the reading device outputs a determination result indicated by the determination result information received from the information processing device. Document assessment system.

2. the information processing device stores area data indicating an area to be printed in composite black in the document; the printing device printing at least a portion of the document in the composite black in accordance with the region data to generate the authentic print; the information processing device determines whether the object read by the reading device is the genuine printed matter based on whether the document indicated by the read data is the document printed in accordance with the stored area data; The document determination system according to claim 1 .

3. A code image is printed on the genuine printed matter, the code image having identification data recorded thereon, the identification data being used to identify the area printed in composite black, the reading device acquires the identification data from the code image indicated by the read data, and identifies an area printed in composite black in the document printed on the reading target based on the acquired identification data; the information processing device determines whether the object read by the reading device is the genuine printed matter based on a result of identification based on the identification data and on the area indicated by the area data stored therein; The document determination system according to claim 2 .

4. the information processing device stores the document data, the area data, and identification information for identifying the document data in association with each other; A code image having the identification information recorded thereon is printed on the genuine printed matter, the information processing device determines whether the object read by the reading device is the genuine printed matter based on whether the document indicated by the read data is the document printed in accordance with the area data corresponding to the identification information recorded in the code image indicated by the read data. The document determination system according to claim 2 or 3.

5. A step of generating an authentic printed matter in which a document indicated by document data stored in an information processing device is printed and at least a portion of the document is printed in composite black, which is a black color expressed by a plurality of colors of printing materials; A step of reading a printed surface of a reading target, which is the genuine printed matter or a copy printed matter obtained by copying the genuine printed matter, by a reading device; determining whether the object read by the reading device is the genuine printed matter based on whether at least a portion of the document indicated by the read data generated by the reading device is printed in the composite black; a step of, when determining whether the read object read by the reading device is the genuine printed matter, the information processing device transmitting determination result information indicating a determination result to the reading device; and outputting, by the reading device, a determination result indicated by the determination result information received from the information processing device. Document assessment method.

6. A storage unit that stores document data; an authenticity determination unit that determines whether the object read by the reading device is an authentic printed matter on which a document indicated by the document data stored in the memory unit is printed and at least a portion of the document indicated by the document data stored in the memory unit is printed in composite black, based on whether at least a portion of the document indicated by the read data generated by the reading device is printed in composite black, which is a black color expressed by multiple printing materials; and a communication control unit that, when it is determined whether the read object read by the reading device is the genuine printed matter, transmits determination result information indicating the determination result to the reading device. Information processing device.

Images