JP2024018931A - Information processing system and information processing method - Google Patents

Abstract

To enable use of digital watermarking for a wider range of purposes in 3D data systems.SOLUTION: An information processing system is provided, comprising reception means for acknowledging change in information on a 3D model, generation means for generating a code for identifying the change, and embedding means for embedding the generated code in the 3D model as a digital watermark.SELECTED DRAWING: Figure 2

Description

The present invention relates to a technique for embedding watermark information in three-dimensional shape data.

2. Description of the Related Art Techniques for embedding watermark information in three-dimensional shape data have been known. For example, in Patent Document 1, in order to embed watermark information in three-dimensional shape data, predetermined bits of parameters related to display mode are changed to numerical information obtained by converting the watermark information, and the watermark information is embedded in three-dimensional shape data. Discloses technology for embedding in model information.

Patent No. 4081033

In the technology described in Patent Document 1, the digital watermark used as watermark information is for copyright protection, and its uses are limited.

An object of the present invention is to utilize digital watermarks for more diverse purposes in a 3D data system.

One aspect of the present invention includes: a receiving unit that accepts a change in information regarding a 3D model; a generating unit that generates a code that specifies the change; and an embedding unit that embeds the generated code in the 3D model as a digital watermark. An information processing system is provided.

The generating means may generate an image code, and the embedding means may embed the image code into the 3D model.

The embedding means may embed the image code as a change in the geometry of the 3D model.

The embedding means may embed the image code as a change in texture of the 3D model.

This information processing system may include a removal unit that removes the digital watermark from the 3D model, and a display unit that displays the 3D model from which the digital watermark has been removed by the removal unit.

Changing the information regarding the 3D model may be editing the 3D model.

The code may indicate a history of changes to the 3D model.

The code may indicate biological information obtained from the subject of the 3D model.

The biometric information is any of a plurality of predetermined types of biometric information, and the embedding means adds an electronic watermark to the 3D model in a format corresponding to the type of information for which change is accepted by the accepting means. May be embedded.

Another aspect of the present invention includes the steps of accepting a change in information regarding a 3D model, generating a code that specifies the change, and embedding the generated code in the 3D model as a digital watermark. .

According to the present invention, digital watermarks can be used for more diverse purposes in a 3D data system.

FIG. 1 is a diagram showing an overview of an information processing system according to an embodiment. FIG. 1 is a diagram illustrating a functional configuration of an information processing system. FIG. 3 is a diagram illustrating the hardware configuration of a server. The figure which illustrates the hardware configuration of the change terminal. The figure which illustrates the hardware configuration of the viewing terminal. FIG. 3 is a sequence diagram illustrating a 3D data change process. A diagram illustrating a change information database. 3 is a flowchart illustrating the operation of a viewing terminal that performs 3D data display processing. A diagram illustrating a 3D data display screen. A diagram illustrating a 3D data display screen. A diagram illustrating a 3D data display screen. A diagram illustrating a 3D data display screen.

1. Configuration FIG. 1 is a diagram showing an overview of an information processing system S according to an embodiment. The information processing system S includes a server 10, a network 20, a change terminal 30, and a viewing terminal 40. The network 20 is a network line network such as the Internet. The change terminal 30 and the viewing terminal 40 can be connected to the network 20 by wire or wirelessly, and can communicate with the server 10 connected to the network 20 via the network 20.

The information processing system S is a system that generates a digital watermark based on changes in 3D model data (hereinafter referred to as 3D data) and embeds the generated digital watermark in the 3D data. A 3D model is a three-dimensional model in the shape of a subject that is generated using a 3D scanner, and is, for example, a person or an animal such as a pet. The 3D model accurately reproduces the external features of the human body. The digital watermark includes information regarding the 3D model (hereinafter referred to as model information). The model information is, for example, biological information of a subject corresponding to a 3D model. The biological information of the subject is, for example, heart rate, blood pressure, body temperature map, measurement data, exercise history, meal history, or medical history. The model information is changed by an operation by a user (hereinafter referred to as a changer) on the change terminal 30. Changing model information is, for example, editing already existing model information, adding new model information, or deleting already existing model information. Information related to changes in model information (hereinafter referred to as change information) is specified by a code generated to specify the change information. That is, the code contains change information. The code is, for example, a QR code (registered trademark), a body temperature map, or a contour line (hereinafter collectively referred to as an image code). The code is embedded into the 3D model as a digital watermark. The code embedded as a digital watermark is switched between display and non-display based on predetermined conditions.

By recording the code containing the change information together with the 3D data and displaying such 3D data on the viewing terminal 40, various services using the 3D data as a key can be realized. The various services are, for example, support for telemedicine, support for health promotion, or support for purchasing decorative items. Specifically, as an example, it is assumed that a code including a history of a patient's biometric information is embedded as a digital watermark in a 3D model with the patient as the subject. A doctor who examines a patient at a location different from the patient's location can check the patient's physique using a 3D model and examine the patient using the history of biometric information embedded as a digital watermark. . In this case, the changer is the patient and the viewer is the doctor.

As another example, it is assumed that a code containing the exercise history of a trainee at a gym is embedded as a digital watermark in a 3D model with the trainee as the subject. A trainer who provides exercise guidance to a trainee can use a 3D model to check the patient's physique in detail, and use the exercise history embedded as a digital watermark to provide exercise guidance to the trainee. In this case, the changer is the trainee and the viewer is the trainer.

Furthermore, as another example, it is assumed that a code containing measurement data of a wearer of clothing is embedded as a digital watermark in a 3D model with the wearer as the subject. A clothing purchaser can select and purchase clothing that fits the wearer's body while checking the wearer's body size using a 3D model. By using the viewing terminal 40 to virtually try on the 3D model of the clothing on the 3D model of the wearer, the purchaser can virtually try on the 3D model of the wearer. In this case, the changer is the wearer and the viewer is the purchaser.

The server 10 is a server that embeds a digital watermark in a 3D model based on change information obtained from the change terminal 30. The server 10 generates a code that specifies the change information. The server 10 embeds the generated code in the 3D model as a digital watermark, and stores the 3D model with the digital watermark embedded therein.

The change terminal 30 is a terminal that accepts changes to 3D data or model information in accordance with an operation by a changer. The change terminal 30 generates change information and transmits the change information to the server 10. The viewing terminal 40 acquires 3D data in response to operations by the viewer. The viewing terminal 40 displays the 3D data from which the digital watermark has been removed.

FIG. 2 is a diagram illustrating the functional configuration of the information processing system S. As shown in FIG. The information processing system S includes a requesting means 201, an acquiring means 202, a transmitting means 203, an acquiring means 204, an accepting means 205, a generating means 206, a transmitting means 207, an accepting means 208, a generating means 209, an embedding means 210, a storage means 211 , transmission means 212, acquisition means 213, removal means 214, display means 215, control means 216, control means 217, and control means 218.

The functions of the server 10 will be explained. The acquisition unit 202 acquires a request for 3D data from the change terminal 30. The transmitting means 203 transmits 3D data to the change terminal 30 in response to a request from the change terminal 30. The accepting means 208 accepts changes to model information from the change terminal 30. The generating means 209 generates a code that specifies a change in model information. The embedding means 210 embeds a code in the 3D model as a digital watermark. The storage means 211 stores various data including 3D data. The transmitting means 212 transmits 3D data to the viewing terminal 40 in response to a request from the viewing terminal 40. Control means 216 executes various controls.

The functions of the change terminal 30 will be explained. The requesting means 201 requests the server 10 to transmit 3D data. The acquisition means 204 acquires 3D data from the server 10. The accepting means 205 accepts changes to the model information through the change user's operation of the change terminal 30. The generating means 206 generates change information. The transmitting means 207 transmits the change information to the server 10. Control means 217 executes various controls.

The functions of the viewing terminal 40 will be explained. The acquisition means 213 acquires 3D data from the server 10. The removal unit 214 removes the digital watermark from the 3D data. The display means 215 displays the 3D data from which the digital watermark has been removed. Control means 218 executes various controls.

FIG. 3 is a diagram illustrating the hardware configuration of the server 10. The server 10 is a computer device that includes a CPU (Central Processing Unit) 101, a memory 102, a storage 103, and a communication IF (Interface) 104. The CPU 101 is a control device that executes programs, performs various calculations, and controls other hardware elements of the server 10. The memory 102 is a main storage device that functions as a work area when the CPU 101 executes a program. The storage 103 is a nonvolatile auxiliary storage device that stores various programs and data. The communication IF 104 is a communication device that communicates with other devices according to a predetermined communication standard (eg, Ethernet (registered trademark)).

In this example, the storage 103 stores a program (hereinafter referred to as a "server program") for causing a computer device to function as the server 10 in the information processing system S. The functions shown in FIG. 3 are implemented in the computer device by the CPU 101 executing the server program. In a state where the CPU 101 is executing the server program, at least one of the memory 102 and the storage 103 is an example of the storage means 211, and the CPU 101 is an example of the generation means 209, the embedding means 210, and the control means 216, The communication IF 104 is an example of the acquisition means 202, the transmission means 203, the reception means 208, and the transmission means 212.

FIG. 4 is a diagram illustrating the hardware configuration of the change terminal 30. The change terminal 30 is a computer device that includes a processor 301 , a memory 302 , an interface 303 , a communication section 304 , an output section 305 , and an input section 306 . These structures are communicatively connected to each other, for example by a bus.

The processor 301 controls each part of the change terminal 30 by reading and executing a computer program (hereinafter simply referred to as a program) stored in the memory 302. The processor 301 is, for example, a CPU (Central Processing Unit). The memory 302 is a storage unit that stores the OS, various programs, data, etc. that are read into the processor 301. The memory 302 includes a RAM (Random Access Memory) and a ROM (Read Only Memory). Note that the memory 302 may include an auxiliary storage device such as a solid state drive or a hard disk drive. The interface 303 is a communication circuit that communicably connects the processor 301 to the communication unit 304, output unit 305, and input unit 306. The communication unit 304 controls communication with the server 10 via the network 20. The output unit 305 includes a display unit such as a display and an audio output unit such as a speaker, and outputs images, characters, or audio. Specifically, the output unit 305 includes a display 3051 in this embodiment. The display 3051 is configured with a flat panel display such as a liquid crystal display or an organic EL display, and outputs images or characters. The input unit 306 is an operation unit configured with a keyboard, a mouse, or the like, and inputs various information according to the user's instructions. In this embodiment, the input unit 306 is configured with a touch panel 3061. The touch panel 3061 is an electronic component such as a touch pad that combines the display 3051, which is a flat panel display, with a position input device, and is an input device that allows the user to operate the device by touching the display portion on the screen.

In this example, the programs stored in the memory 302 include a program for causing the computer to function as the change terminal 30 in the information processing system S (hereinafter referred to as "change terminal program"). The functions shown in FIG. 2 are implemented in the change terminal 30 by the processor 301 executing the change terminal program. In a state where the processor 301 is executing a program, the processor 301 is an example of the reception means 205, the generation means 206, and the control means 217, and the communication section 304 is an example of the request means 201, the acquisition means 204, and the transmission means 207. This is an example.

As the change terminal 30, a tablet terminal is used in this embodiment, but a PC (personal computer), a smartphone, or the like may also be used.

FIG. 5 is a diagram illustrating the hardware configuration of the viewing terminal 40. The viewing terminal 40 is a computer device having a processor 401, a memory 402, an interface 403, a communication section 404, an output section 405, and an input section 406. These structures are communicatively connected to each other, for example by a bus.

The processor 401 controls each part of the viewing terminal 40 by reading and executing a computer program (hereinafter simply referred to as a program) stored in the memory 402 . The processor 401 is, for example, a CPU (Central Processing Unit). The memory 402 is a storage unit that stores the OS, various programs, data, etc. that are read into the processor 401. The memory 402 includes a RAM (Random Access Memory) and a ROM (Read Only Memory). Note that the memory 402 may include a solid state drive, a hard disk drive, or the like. The interface 403 is a communication circuit that communicably connects the processor 401 to the communication unit 404, output unit 405, and input unit 406. The communication unit 404 controls communication with the server 10 via the network 20. The output unit 405 includes a display unit such as a display and an audio output unit such as a speaker, and outputs images, characters, or audio. Specifically, the output unit 405 includes a display 4051 in this embodiment. The display 4051 is configured with a flat panel display such as a liquid crystal display or an organic EL display, and outputs images or characters. The input unit 406 is an operation unit configured with a keyboard, a mouse, or the like, and inputs various information according to the user's instruction operation. In this embodiment, the input unit 406 is configured with a touch panel 4061. The touch panel 4061 is an electronic component such as a touch pad that combines the display 4051, which is a flat panel display, with a position input device, and is an input device that allows the user to operate the device by touching the display portion on the screen.

In this example, the programs stored in the memory 402 include a program for causing the computer to function as the viewing terminal 40 in the information processing system S (hereinafter referred to as the "viewing terminal program"). The functions shown in FIG. 2 are implemented in the viewing terminal 40 by the processor 401 executing the viewing terminal program. In a state where the processor 401 is executing a program, the processor 401 is an example of the removal means 214 and the control means 218, the communication section 404 is an example of the acquisition means 213, and the display 4051 is an example of the display means 215. This is an example.

As the viewing terminal 40, a tablet terminal is used in this embodiment, but a PC (personal computer), a smartphone, or the like may also be used.

2. Operation 2.1 Changing 3D Data FIG. 6 is a sequence diagram illustrating a 3D data changing process in the information processing system S. The modification terminal 30 starts an application for editing the 3D data through an operation by the modification person. The requesting means 201 of the change terminal 30 requests the server 10 for 3D data to be displayed in the application of the change terminal 30 (step S601). The acquisition means 202 of the server 10 acquires a request for 3D data from the change terminal 30.

In step S602, the transmitting means 203 of the server 10 transmits the 3D data to the change terminal 30. The acquisition means 204 of the change terminal 30 acquires the 3D data transmitted from the server 10.

In step S603, the accepting means 205 of the change terminal 30 accepts changes to the model information through an operation by the changer.

In step S604, the generation means 206 of the change terminal 30 generates change information. The change information includes the model ID, date of change, category of change, content of change, and name of the person making the change. The model ID is an ID for uniquely identifying the subject corresponding to the 3D model. The categories of changes are editing, addition, or deletion. Editing is when existing model information is edited, and addition is when new model information is added to an already existing model. When information is deleted, it is deleted. For example, assume that on June 12, 2022, a person named Taro Yamada added glasses to the face of a 3D model whose model ID is xxx. In this case, the change information includes "xxx" for the model name, "June 12, 2022" as the date of the change, "Add" as the change category, "Glasses" as the change content, and the person who made the change. His name includes "Taro Yamada". If the color of the glasses originally worn by the 3D model is changed, the category of the change is "edit" and the content of the change is "glasses."

In step S605, the transmitting means 207 of the change terminal 30 transmits the change information to the server 10. The receiving means 208 of the server 10 receives change information transmitted from the change terminal 30.

In step S606, the generating means 209 of the server 10 generates a code for specifying change information. There are multiple code formats, which differ depending on the type of information included in the code, for example. The types of information included in the code include, for example, information that represents the distribution of physical quantities on the 3D model surface (hereinafter referred to as distribution information), or information that does not represent the distribution of physical quantities on the 3D model surface (hereinafter referred to as non-distribution information). ). The format of the code indicating the distribution information is, for example, a body temperature map or a contour line. The format of the code indicating non-distribution information is, for example, a QR code (registered trademark). The format of the code to be generated in step S606 is determined depending on the content of the change information. For example, if the change information is blood pressure, a QR code (registered trademark) is generated, and if the change information is a body temperature map, a body temperature map is generated.

In step S607, the embedding means 210 of the server 10 embeds the code in the 3D model as a digital watermark. A 3D model is composed of geometry and texture. Geometry is a group of data representing parameters of functions and mathematical formulas that constitute the external shape of a solid that is displayed as a 3D model. Texture is an image used to express the texture or color of a three-dimensional surface. A digital watermark may be embedded as a change in the geometry of a 3D model, as a change in the texture of the 3D model, or as a change in both the geometry and texture of the 3D model. When a digital watermark is embedded as a change in the geometry of a 3D model, a change in shape is given to the 3D model, and the digital watermark is embedded in the 3D model in such a way that the change is visible. When a digital watermark is embedded as a change in the texture of a 3D model, a colored digital watermark is embedded in the 3D model without changing its shape. When a digital watermark is embedded as a change in both the geometry and texture of a 3D model, a change in shape is given to the 3D model, and a colored digital watermark is embedded in the 3D model in such a way that the change can be visually recognized. How the digital watermark is embedded is determined by, for example, the operation of the change terminal 30 by the person making the change.

In step S608, the storage unit 211 of the server 10 stores the 3D model with the digital watermark embedded in the change information database.

FIG. 7 is a diagram illustrating a change information database. The change information database contains change information. For example, the change information database stores the date of change, category of change, content of change, and name of the person making the change in association with the model ID. The change information database also stores change information stored in the past.

2.2 Display of 3D Data FIG. 8 is a flowchart illustrating the operation of the viewing terminal 40 that performs 3D data display processing. The viewing terminal 40 starts an application for displaying 3D data through an operation by a viewer. The 3D data display process is started when the viewing terminal 40 requests the server 10 to display 3D data. The transmitting means 212 of the server 10 transmits 3D data. The acquisition means 213 of the viewing terminal 40 acquires 3D data (step S901).

In step S902, the removing means 214 of the viewing terminal 40 removes the electronic watermark included in the 3D data when the viewing terminal 40 has an encryption key stored in advance in association with the 3D data. do. That is, regarding the removal of the digital watermark of the 3D data acquired in step S901, if the viewing terminal 40 has been authenticated, the digital watermark is removed. Furthermore, if other predetermined conditions are met, the digital watermark is removed. The predetermined condition is, for example, when the subject corresponding to the 3D data allows the viewing terminal 40 to display the subject's own 3D model, or when the viewing terminal 40 manages the information processing system S. This is a case where a 3D model is acquired using an application specified by a person or the like. Furthermore, the digital watermark may be removed depending on the type of change information. For example, if the category of modification corresponding to the digital watermark embedded in the acquired 3D model is a specific category (eg, "add" or "delete"), the digital watermark may be removed.

In step S903, the display unit 215 of the viewing terminal 40 displays the 3D data from which the digital watermark has been removed. Various types of 3D data can be displayed by the viewer selecting various buttons displayed on the viewing terminal 40.

9 to 12 are diagrams illustrating 3D data display screens. In the diagram shown in FIG. 8, a 3D model, a watermark button 901, a change history button 902, and a body temperature map button 903 (collectively referred to as buttons) are displayed. The viewer can select at least one of the watermark button 901, change history button 902, and body temperature map button 903 through operation of the viewing terminal 40. The button is selected in response to the viewer pressing the button on the viewing terminal 40. The line surrounding the selected button is thicker than the line surrounding the unselected button, so the viewer can easily recognize which button is in the selected state.

FIG. 9 is a 3D data display screen displayed on the viewing terminal 40 in step S903. In the diagram shown in FIG. 9, all buttons are not selected.

In the diagram shown in FIG. 10, a watermark button 901 is selected, and a change history button 902 and a body temperature map button 903 are not selected. When the watermark button 901 is selected, a digital watermark is displayed superimposed on the 3D model. In the diagram shown in FIG. 10, QR codes (registered trademark) 1001 to 1003 are displayed as digital watermarks. If the watermark button 901 is pressed through an operation by the viewer while the watermark button 901 is selected, the watermark button 901 becomes unselected and the digital watermark is no longer displayed on the 3D model. If the viewing terminal 40 used by the viewer has not been certified for digital watermark removal, a screen as shown in FIG. 10 is displayed on the viewing terminal 40. Further, even if the viewing terminal 40 has been authenticated, if the viewer presses the watermark button and the watermark button 901 becomes selected, the screen shown in FIG. 10 will be displayed on the viewing terminal. 40.

In the diagram shown in FIG. 11, the change history button 902 is selected, and the watermark button 901 and body temperature map button 903 are not selected. When the change history button 902 is selected, the change history of the 3D model is displayed together with the 3D model. The change history includes, among the change information, the date on which the change was executed, the category of the change, the content of the change, and the name of the person who made the change. For example, in the diagram shown in FIG. 11, glasses were added to the 3D model on June 12, 2022 by a changer named Taro Yamada. If the change history button 902 is pressed through an operation by the viewer while the change history button 902 is selected, the change history button 902 becomes unselected and the display 4051 of the viewing terminal 40 shows Change history is no longer displayed. By displaying the change history on the viewing terminal 40, the viewer can easily recognize the changes in the 3D model.

In the diagram shown in FIG. 12, the body temperature map button 903 is selected, and the watermark button 901 and change history button 902 are not selected. When the body temperature map button 903 is selected, the body temperature map is displayed overlapping the 3D model. When the body temperature map button 903 is pressed through an operation by the viewer, the body temperature map button 903 becomes unselected, and the body temperature map is no longer displayed on the 3D model. By displaying the body temperature map on the viewing terminal 40, the viewer can easily recognize the body temperature distribution of the person corresponding to the 3D model. For example, if the viewer is a doctor and the person corresponding to the 3D model is a patient who is in a different location than the doctor, the doctor can determine the temperature of which part of the patient's body. You can know specifically.

3. Modifications The present invention is not limited to the above-described embodiments, and various modifications are possible. Some modified examples will be explained below. Two or more of the items described in the following modified examples may be used in combination.

The biological information used as model information is not limited to heart rate, blood pressure, body temperature map, measurement data, exercise history, meal history, or medical history, and may be any information related to the physical condition of the subject of the 3D model. The biological information may be, for example, a history of weight.

Buttons displayed on the 3D data display screen are not limited to the watermark button 901, change history button 902, and body temperature map button 903. The button may be, for example, a contour button for displaying contour lines.

The change history displayed on the 3D data display screen does not necessarily have to include all the change history. For example, a history of changes over a predetermined period such as the past six months may be displayed, or only change information whose change category is editing may be displayed.

The change terminal 30 and the viewing terminal 40 are not limited to being different terminals, and the changing terminal 30 and the viewing terminal 40 may be the same terminal.

The changing terminal program and the viewing terminal program are not limited to being mutually different programs, and may be the same program. When the changing terminal program and the viewing terminal program are the same program, the program has both the function of changing the 3D model and the function of displaying the 3D model.

The correspondence between functional elements and hardware elements in the information processing system S is not limited to that illustrated in the embodiment. For example, some of the functions described as the functions of the server 10 in the embodiment may be implemented in another server. Alternatively, some of the functions described as the functions of the server 10 in the embodiment may be implemented in other devices on the network. The server 10 may be a physical server or a virtual server (including a so-called cloud server). A part or all of the functions of the change terminal 30 or the viewing terminal 40 may be implemented in the server 10.

The operation of the information processing system S is not limited to the example described above. The order of the processing procedures of the information processing system S may be changed as long as there is no contradiction. Further, some processing procedures of the information processing system S may be omitted.

In short, in the information processing system according to the present invention, there is provided a reception step that receives a change in information regarding a 3D model, a generation unit that generates a code that specifies the change, and embeds the generated code in the 3D model as a digital watermark. It is sufficient that the embedding means is executed.

The various programs illustrated in the embodiments may be provided by downloading via a network such as the Internet, or may be provided on a computer-readable non-temporary recording medium such as a DVD-ROM (Digital Versatile Disc Read Only Memory). It may be provided in a recorded state.

DESCRIPTION OF SYMBOLS 10... Server, 20... Network, 30... Terminal for change, 40... Terminal for viewing, 101... CPU, 102... Memory, 103... Storage, 104... Communication IF, 201... Request means, 202... Acquisition means, 203... Transmission means, 204... acquisition means, 205... receiving means, 206... generating means, 207... transmitting means, 208... receiving means, 209... generating means, 210... embedding means, 211... storage means, 212... transmitting means, 213... Acquisition means, 214... Removal means, 215... Display means, 216... Control means, 217... Control means, 218... Control means, 301... Processor, 302... Memory, 303... Interface, 304... Communication unit, 305... Output unit, 306... Input section, 401... Processor, 402... Memory, 403... Interface, 404... Communication section, 405... Output section, 406... Input section, 901... Watermark button, 902... Change history button, 903... Body temperature map button, 1001 ...QR code, 1002...QR code, 1003...QR code, 3051...display, 3061...touch panel, 4051...display, 4061...touch panel

Claims (10)

a reception means for accepting changes to information regarding the 3D model;
generating means for generating a code specifying the change;
and embedding means for embedding the generated code in the 3D model as a digital watermark. The generating means generates an image code,
The information processing system according to claim 1, wherein the embedding means embeds the image code in the 3D model. The information processing system according to claim 2, wherein the embedding means embeds the image code as a change in geometry of the 3D model. The information processing system according to claim 2, wherein the embedding means embeds the image code as a change in texture of the 3D model. removing means for removing the digital watermark from the 3D model;
The information processing system according to claim 1, further comprising: a display unit for displaying a 3D model from which the digital watermark has been removed by the removal unit. The information processing system according to claim 1, wherein changing the information regarding the 3D model is editing the 3D model. The information processing system according to claim 1, wherein the code indicates a change history of the 3D model. The information processing system according to claim 1, wherein the code indicates biological information obtained from the subject of the 3D model. The biometric information is any of a plurality of predetermined types of biometric information,
The information processing system according to claim 8, wherein the embedding unit embeds, in the 3D model, a digital watermark in a format according to the type of information whose change is accepted by the accepting unit. accepting changes to information regarding the 3D model;
generating code identifying the change;
embedding the generated code in the 3D model as a digital watermark.

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