JP7514076B2 - Program, method and information processing device - Google Patents

Description

The present disclosure relates to a program, a method, and an information processing device.

Conventionally, there are known programs for displaying 360-degree video on a head-mounted display. Patent Document 1 discloses an invention that controls the time axis of 360-degree video displayed on a head-mounted display according to the inclination of the head-mounted display.

Japanese Patent No. 6130478

However, the invention described in Patent Document 1 leaves room for improvement in terms of improving the convenience for users when watching 360-degree videos.

The present disclosure aims to provide a program, method, and information processing device that can improve the convenience of users when watching 360-degree videos.

According to one aspect of the present disclosure, the program causes a processor to execute the steps of: defining a virtual space; accepting input of an image captured by a 360-degree camera; arranging a virtual viewpoint in the virtual space; arranging a display object in the virtual space; displaying the input image on the display object; identifying a tracked object in the virtual space; detecting head movement of a user associated with a head-mounted device; controlling a field of view from the virtual viewpoint in response to the head movement; if the tracked object is not included in the field of view from the virtual viewpoint, controlling the rotation of the virtual space so that the tracked object is included in the field of view from the virtual viewpoint; and displaying a field of view image corresponding to the field of view from the virtual viewpoint on the head-mounted device.

According to the present disclosure, it is possible to provide a program, a method, and an information processing device that can improve the convenience of users when watching 360-degree videos.

FIG. 1 is a diagram illustrating an outline of the configuration of an HMD system according to an embodiment. FIG. 1 is a block diagram illustrating an example of a hardware configuration of a computer according to an embodiment. FIG. 2 is a diagram conceptually illustrating a uvw field of view coordinate system set in an HMD according to an embodiment. FIG. 1 is a diagram conceptually illustrating one mode of expressing a virtual space according to an embodiment. 1 is a top view of a user's head wearing an HMD according to an embodiment. 1 is a diagram showing a YZ cross section of a field of view in a virtual space as viewed from an X direction. 13 is a diagram showing an XZ cross section of a field of view in a virtual space as viewed from the Y direction. FIG. 2 is a diagram illustrating a schematic configuration of a controller according to an embodiment. FIG. 2 illustrates an example of yaw, roll, and pitch directions defined relative to a user's right hand according to one embodiment. FIG. 2 is a block diagram illustrating an example of a hardware configuration of a server according to an embodiment. FIG. 1 is a block diagram illustrating a modular configuration of a computer according to an embodiment. 11 is a sequence chart showing a part of a process executed in an HMD set according to an embodiment. 1 is a schematic diagram showing a situation in which each HMD provides a virtual space to a user in a network. FIG. 13 is a diagram showing a field of view image of user 5A in FIG. FIG. 11 is a sequence diagram showing a process executed in an HMD system according to an embodiment. FIG. 2 is a block diagram illustrating a detailed configuration of a module of a computer according to an embodiment. FIG. 1 is a diagram illustrating an outline of a configuration for a 360-degree camera according to an embodiment. FIG. 13 is a diagram showing the zenith of a virtual space. FIG. 13 is a diagram showing the positional relationship between a field of view and a tracked object, and shows a case where the tracked object is located within the field of view. FIG. 13 is a diagram showing the positional relationship between a field of view and a tracked object, and shows a case where the tracked object is located outside the field of view. 11 is a flowchart showing a part of a process executed in an HMD set according to an embodiment, the process being related to control of a 360-degree camera. 20 is a flowchart showing an example of the automatic tracking process shown in FIG. 19 . FIG. 13 is a diagram showing an example of dividing a virtual space into three equal parts.

The following describes in detail an embodiment of this technical idea with reference to the drawings. In the following description, the same components are given the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated. In one or more embodiments shown in this disclosure, the elements included in each embodiment can be combined with each other, and the result of such combination is also considered to be part of the embodiment shown in this disclosure.

[Configuration of HMD system]
The configuration of an HMD (Head-Mounted Device) system 100 will be described with reference to Fig. 1. Fig. 1 is a diagram showing an outline of the configuration of an HMD system 100 according to the present embodiment. The HMD system 100 is provided as a system for home use or a system for commercial use.

The HMD system 100 includes a server 600, HMD sets 110A, 110B, 110C, and 110D, an external device 700, and a network 2. Each of the HMD sets 110A, 110B, 110C, and 110D is configured to be able to communicate with the server 600 and the external device 700 via the network 2. Hereinafter, the HMD sets 110A, 110B, 110C, and 110D are collectively referred to as the HMD set 110. The number of HMD sets 110 constituting the HMD system 100 is not limited to four, and may be three or less, or five or more. The HMD set 110 includes an HMD 120, a computer 200, an HMD sensor 410, a display 430, and a controller 300. The HMD 120 includes a monitor 130, a gaze sensor 140, a first camera 150, a second camera 160, a microphone 170, and a speaker 180. The controller 300 may include a motion sensor 420.

In one aspect, the computer 200 can be connected to the Internet or other network 2, and can communicate with a server 600 or other computers connected to the network 2. Examples of other computers include computers of other HMD sets 110 and external devices 700. In another aspect, the HMD 120 can include a sensor 190 instead of the HMD sensor 410.

The HMD 120 is worn on the head of the user 5 and can provide a virtual space to the user 5 during operation. More specifically, the HMD 120 displays an image for the right eye and an image for the left eye on the monitor 130. When each eye of the user 5 views the respective image, the user 5 can recognize the image as a three-dimensional image based on the parallax between the two eyes. The HMD 120 can include both a so-called head-mounted display equipped with a monitor and a head-mounted device to which a smartphone or other terminal equipped with a monitor can be attached.

The monitor 130 is realized, for example, as a non-transparent display device. In one aspect, the monitor 130 is disposed on the main body of the HMD 120 so as to be positioned in front of both eyes of the user 5. Thus, when the user 5 visually recognizes the three-dimensional image displayed on the monitor 130, the user 5 can be immersed in the virtual space. In one aspect, the virtual space includes, for example, images of a background, objects that the user 5 can operate, and menus that the user 5 can select. In one aspect, the monitor 130 can be realized as a liquid crystal monitor or an organic EL (Electro Luminescence) monitor provided in a so-called smartphone or other information display terminal.

In another aspect, the monitor 130 may be realized as a transmissive display device. In this case, the HMD 120 may be an open type such as a pair of glasses, rather than a closed type that covers the eyes of the user 5 as shown in FIG. 1. The transmissive monitor 130 may be temporarily configurable as a non-transmissive display device by adjusting its transmittance. The monitor 130 may include a configuration that simultaneously displays a portion of an image that constitutes a virtual space and the real space. For example, the monitor 130 may display an image of the real space captured by a camera mounted on the HMD 120, or may make the real space visible by setting the transmittance of a portion of the image high.

In one aspect, the monitor 130 may include a sub-monitor for displaying an image for the right eye and a sub-monitor for displaying an image for the left eye. In another aspect, the monitor 130 may be configured to display an image for the right eye and an image for the left eye as a single unit. In this case, the monitor 130 includes a high-speed shutter. The high-speed shutter operates to alternately display an image for the right eye and an image for the left eye so that the image is perceived by only one of the eyes.

In one aspect, the HMD 120 includes multiple light sources (not shown). Each light source is realized, for example, by an LED (Light Emitting Diode) that emits infrared rays. The HMD sensor 410 has a position tracking function for detecting the movement of the HMD 120. More specifically, the HMD sensor 410 reads multiple infrared rays emitted by the HMD 120 and detects the position and tilt of the HMD 120 in real space.

In another aspect, the HMD sensor 410 may be realized by a camera. In this case, the HMD sensor 410 can detect the position and inclination of the HMD 120 by performing image analysis processing using image information of the HMD 120 output from the camera.

In another aspect, the HMD 120 may include a sensor 190 as a position detector instead of or in addition to the HMD sensor 410. The HMD 120 may use the sensor 190 to detect the position and inclination of the HMD 120 itself. For example, if the sensor 190 is an angular velocity sensor, a geomagnetic sensor, or an acceleration sensor, the HMD 120 may use any of these sensors instead of the HMD sensor 410 to detect the position and inclination of the HMD 120 itself. As an example, if the sensor 190 is an angular velocity sensor, the angular velocity sensor detects the angular velocity of the HMD 120 around three axes in real space over time. The HMD 120 calculates the change in angle of the HMD 120 around the three axes over time based on each angular velocity, and further calculates the inclination of the HMD 120 based on the change in angle over time.

The gaze sensor 140 detects the direction in which the gaze of the right eye and left eye of the user 5 is directed. In other words, the gaze sensor 140 detects the gaze of the user 5. The detection of the gaze direction is realized, for example, by a known eye tracking function. The gaze sensor 140 is realized by a sensor having the eye tracking function. In a certain aspect, the gaze sensor 140 preferably includes a sensor for the right eye and a sensor for the left eye. The gaze sensor 140 may be, for example, a sensor that irradiates the right eye and left eye of the user 5 with infrared light and detects the rotation angle of each eyeball by receiving reflected light from the cornea and iris in response to the irradiated light. The gaze sensor 140 can detect the gaze of the user 5 based on each detected rotation angle.

The first camera 150 photographs the lower part of the face of the user 5. More specifically, the first camera 150 photographs the nose and mouth of the user 5. The second camera 160 photographs the eyes and eyebrows of the user 5. The housing of the HMD 120 on the user 5 side is defined as the inside of the HMD 120, and the housing of the HMD 120 on the opposite side to the user 5 is defined as the outside of the HMD 120. In one aspect, the first camera 150 may be disposed outside the HMD 120, and the second camera 160 may be disposed inside the HMD 120. The images generated by the first camera 150 and the second camera 160 are input to the computer 200. In another aspect, the first camera 150 and the second camera 160 may be realized as a single camera, and the face of the user 5 may be photographed by this single camera.

The microphone 170 converts the speech of the user 5 into an audio signal (electrical signal) and outputs it to the computer 200. The speaker 180 converts the audio signal into sound and outputs it to the user 5. In another aspect, the HMD 120 may include earphones instead of the speaker 180.

The controller 300 is connected to the computer 200 by wire or wirelessly. The controller 300 accepts input of commands from the user 5 to the computer 200. In one aspect, the controller 300 is configured to be held by the user 5. In another aspect, the controller 300 is configured to be attached to a part of the body or clothing of the user 5. In yet another aspect, the controller 300 may be configured to output at least one of vibration, sound, and light based on a signal transmitted from the computer 200. In yet another aspect, the controller 300 accepts operations from the user 5 to control the position and movement of an object placed in a virtual space.

In one aspect, the controller 300 includes multiple light sources. Each light source is realized, for example, by an LED that emits infrared light. The HMD sensor 410 has a position tracking function. In this case, the HMD sensor 410 reads multiple infrared rays emitted by the controller 300 and detects the position and tilt of the controller 300 in real space. In another aspect, the HMD sensor 410 may be realized by a camera. In this case, the HMD sensor 410 can detect the position and tilt of the controller 300 by performing image analysis processing using image information of the controller 300 output from the camera.

In one aspect, the motion sensor 420 is attached to the hand of the user 5 and detects the movement of the hand of the user 5. For example, the motion sensor 420 detects the rotation speed, number of rotations, etc. of the hand. The detected signal is sent to the computer 200. The motion sensor 420 is provided, for example, in the controller 300. In one aspect, the motion sensor 420 is provided, for example, in the controller 300 configured to be held by the user 5. In another aspect, for safety in the real space, the controller 300 is attached to something that is not easily blown away by being worn on the hand of the user 5, such as a glove type. In yet another aspect, a sensor that is not worn by the user 5 may detect the movement of the hand of the user 5. For example, a signal from a camera that captures the user 5 may be input to the computer 200 as a signal representing the movement of the user 5. The motion sensor 420 and the computer 200 are connected to each other wirelessly, as an example. In the case of wireless communication, the communication form is not particularly limited, and for example, Bluetooth (registered trademark) or other known communication methods are used.

The display 430 displays an image similar to the image displayed on the monitor 130. This allows users other than the user 5 wearing the HMD 120 to view an image similar to that of the user 5. The image displayed on the display 430 does not need to be a three-dimensional image, and may be an image for the right eye or an image for the left eye. Examples of the display 430 include a liquid crystal display and an organic EL monitor.

The server 600 may transmit a program to the computer 200. In another aspect, the server 600 may communicate with other computers 200 to provide virtual reality to the HMD 120 used by other users. For example, in an amusement facility, when multiple users play a participatory game, each computer 200 communicates signals based on the actions of each user with the other computers 200 via the server 600, allowing multiple users to enjoy a common game in the same virtual space. Each computer 200 may also communicate signals based on the actions of each user with the other computers 200 without going through the server 600.

The external device 700 may be any device capable of communicating with the computer 200. The external device 700 may be, for example, a device capable of communicating with the computer 200 via the network 2, or a device capable of directly communicating with the computer 200 via short-range wireless communication or a wired connection. Examples of the external device 700 include, but are not limited to, smart devices, PCs (Personal Computers), and peripheral devices of the computer 200.

[Computer hardware configuration]
A computer 200 according to the present embodiment will be described with reference to Fig. 2. Fig. 2 is a block diagram showing an example of a hardware configuration of the computer 200 according to the present embodiment. The computer 200 includes, as main components, a processor 210, a memory 220, a storage 230, an input/output interface 240, and a communication interface 250. Each component is connected to a bus 260.

The processor 210 executes a series of instructions contained in a program stored in the memory 220 or the storage 230 based on a signal provided to the computer 200 or based on the satisfaction of a predetermined condition. In one aspect, the processor 210 is realized as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an MPU (Micro Processor Unit), an FPGA (Field-Programmable Gate Array), or other device.

Memory 220 temporarily stores programs and data. Programs are loaded, for example, from storage 230. Data includes data input to computer 200 and data generated by processor 210. In one aspect, memory 220 is realized as RAM (Random Access Memory) or other volatile memory.

The storage 230 permanently holds programs and data. The storage 230 is realized, for example, as a ROM (Read-Only Memory), a hard disk drive, a flash memory, or other non-volatile storage device. The programs stored in the storage 230 include a program for providing a virtual space in the HMD system 100, a simulation program, a game program, a user authentication program, and a program for realizing communication with other computers 200. The data stored in the storage 230 includes data and objects for defining the virtual space, etc.

In another aspect, the storage 230 may be realized as a removable storage device such as a memory card. In yet another aspect, a configuration may be used in which programs and data stored in an external storage device are used instead of the storage 230 built into the computer 200. With such a configuration, for example, in a situation where multiple HMD systems 100 are used, such as an amusement facility, it becomes possible to perform updates of programs and data collectively.

The input/output interface 240 communicates signals between the HMD 120, the HMD sensor 410, the motion sensor 420, and the display 430. The monitor 130, the gaze sensor 140, the first camera 150, the second camera 160, the microphone 170, and the speaker 180 included in the HMD 120 can communicate with the computer 200 via the input/output interface 240 of the HMD 120. In some aspects, the input/output interface 240 is realized using a terminal such as a Universal Serial Bus (USB), a Digital Visual Interface (DVI), a High-Definition Multimedia Interface (HDMI (registered trademark)), or other terminal. The input/output interface 240 is not limited to those mentioned above.

In one aspect, the input/output interface 240 may further communicate with the controller 300. For example, the input/output interface 240 receives input of signals output from the controller 300 and the motion sensor 420. In another aspect, the input/output interface 240 sends instructions output from the processor 210 to the controller 300. The instructions instruct the controller 300 to vibrate, output sound, emit light, etc. When the controller 300 receives the instructions, it executes either vibration, sound output, or light emission according to the instructions.

The communication interface 250 is connected to the network 2 and communicates with other computers (e.g., the server 600) connected to the network 2. In one aspect, the communication interface 250 is realized as, for example, a LAN (Local Area Network) or other wired communication interface, or a WiFi (Wireless Fidelity), Bluetooth (registered trademark), NFC (Near Field Communication), or other wireless communication interface. The communication interface 250 is not limited to the above.

In one aspect, the processor 210 accesses the storage 230, loads one or more programs stored in the storage 230 into the memory 220, and executes a series of instructions contained in the programs. The one or more programs may include an operating system for the computer 200, an application program for providing a virtual space, game software executable in the virtual space, and the like. The processor 210 sends a signal for providing the virtual space to the HMD 120 via the input/output interface 240. The HMD 120 displays an image on the monitor 130 based on the signal.

2, the computer 200 is shown as being provided outside the HMD 120, but in another aspect, the computer 200 may be built into the HMD 120. As an example, a portable information and communication terminal (e.g., a smartphone) including the monitor 130 may function as the computer 200.

The computer 200 may be configured to be shared by multiple HMDs 120. With such a configuration, for example, the same virtual space can be provided to multiple users, allowing each user to enjoy the same application as other users in the same virtual space.

In one embodiment, a real coordinate system, which is a coordinate system in real space, is set in advance in the HMD system 100. The real coordinate system has three reference directions (axes) that are parallel to the vertical direction in real space, the horizontal direction perpendicular to the vertical direction, and the front-to-back direction perpendicular to both the vertical and horizontal directions. The horizontal direction, vertical direction (up-down direction), and front-to-back direction in the real coordinate system are defined as the x-axis, y-axis, and z-axis, respectively. More specifically, in the real coordinate system, the x-axis is parallel to the horizontal direction in real space. The y-axis is parallel to the vertical direction in real space. The z-axis is parallel to the front-to-back direction in real space.

In one aspect, the HMD sensor 410 includes an infrared sensor. When the infrared sensor detects infrared rays emitted from each light source of the HMD 120, it detects the presence of the HMD 120. The HMD sensor 410 further detects the position and tilt (orientation) of the HMD 120 in real space according to the movement of the user 5 wearing the HMD 120, based on the values of each point (each coordinate value in the real coordinate system). More specifically, the HMD sensor 410 can detect changes over time in the position and tilt of the HMD 120, using each value detected over time.

Each tilt of the HMD 120 detected by the HMD sensor 410 corresponds to each tilt around the three axes of the HMD 120 in the real coordinate system. The HMD sensor 410 sets a uvw field of view coordinate system in the HMD 120 based on the tilt of the HMD 120 in the real coordinate system. The uvw field of view coordinate system set in the HMD 120 corresponds to the viewpoint coordinate system when the user 5 wearing the HMD 120 views an object in the virtual space.

[uvw visual coordinate system]
The uvw field of view coordinate system will be described with reference to Fig. 3. Fig. 3 is a diagram conceptually showing the uvw field of view coordinate system set in the HMD 120 according to an embodiment. The HMD sensor 410 detects the position and inclination of the HMD 120 in the real coordinate system when the HMD 120 is started. The processor 210 sets the uvw field of view coordinate system in the HMD 120 based on the detected values.

As shown in FIG. 3, the HMD 120 sets a three-dimensional uvw field of view coordinate system with the head of the user 5 wearing the HMD 120 as its center (origin). More specifically, the HMD 120 tilts the horizontal, vertical, and front-back directions (x-axis, y-axis, z-axis) that define the real coordinate system around each axis by the tilt of the HMD 120 around each axis in the real coordinate system, and sets the three newly obtained directions as the pitch axis (u-axis), yaw axis (v-axis), and roll axis (w-axis) of the uvw field of view coordinate system in the HMD 120.

In a certain situation, when the user 5 wearing the HMD 120 stands upright and looks straight ahead, the processor 210 sets a uvw field of view coordinate system in the HMD 120 that is parallel to the real coordinate system. In this case, the horizontal direction (x-axis), vertical direction (y-axis), and front-to-back direction (z-axis) in the real coordinate system coincide with the pitch axis (u-axis), yaw axis (v-axis), and roll axis (w-axis) of the uvw field of view coordinate system in the HMD 120.

After the uvw field of view coordinate system is set in the HMD 120, the HMD sensor 410 can detect the tilt of the HMD 120 in the set uvw field of view coordinate system based on the movement of the HMD 120. In this case, the HMD sensor 410 detects the pitch angle (θu), yaw angle (θv), and roll angle (θw) of the HMD 120 in the uvw field of view coordinate system as the tilt of the HMD 120. The pitch angle (θu) represents the tilt angle of the HMD 120 around the pitch axis in the uvw field of view coordinate system. The yaw angle (θv) represents the tilt angle of the HMD 120 around the yaw axis in the uvw field of view coordinate system. The roll angle (θw) represents the tilt angle of the HMD 120 around the roll axis in the uvw field of view coordinate system.

The HMD sensor 410 sets the uvw field of view coordinate system of the HMD 120 after the HMD 120 moves on the HMD 120 based on the detected tilt of the HMD 120. The relationship between the HMD 120 and the uvw field of view coordinate system of the HMD 120 is always constant regardless of the position and tilt of the HMD 120. When the position and tilt of the HMD 120 change, the position and tilt of the uvw field of view coordinate system of the HMD 120 in the real coordinate system change in conjunction with the change in the position and tilt.

In one aspect, the HMD sensor 410 may identify the position of the HMD 120 in real space as a relative position with respect to the HMD sensor 410 based on the infrared light intensity and the relative positional relationship between multiple points (e.g., the distance between each point) acquired based on the output from the infrared sensor. The processor 210 may determine the origin of the uvw field of view coordinate system of the HMD 120 in real space (actual coordinate system) based on the identified relative position.

[Virtual space]
The virtual space will be further described with reference to FIG. 4. FIG. 4 is a diagram conceptually showing one mode of expressing the virtual space 11 according to an embodiment. The virtual space 11 has a spherical structure covering the entire 360-degree direction of the center 12. In FIG. 4, in order to avoid complicating the description, the upper half of the celestial sphere in the virtual space 11 is illustrated. Each mesh is defined in the virtual space 11. The position of each mesh is defined in advance as a coordinate value in the XYZ coordinate system, which is a global coordinate system defined in the virtual space 11. The computer 200 associates each partial image constituting the panoramic image 13 (still image, video, etc.) that can be deployed in the virtual space 11 with each corresponding mesh in the virtual space 11.

In a certain aspect, an XYZ coordinate system is defined in the virtual space 11 with the center 12 as the origin. The XYZ coordinate system is, for example, parallel to the real coordinate system. The horizontal direction, vertical direction (up-down direction), and front-to-back direction in the XYZ coordinate system are defined as the X-axis, Y-axis, and Z-axis, respectively. Therefore, the X-axis (horizontal direction) of the XYZ coordinate system is parallel to the x-axis of the real coordinate system, the Y-axis (vertical direction) of the XYZ coordinate system is parallel to the y-axis of the real coordinate system, and the Z-axis (front-to-back direction) of the XYZ coordinate system is parallel to the z-axis of the real coordinate system.

When the HMD 120 is started up, i.e., in the initial state of the HMD 120, the virtual camera 14 is placed at the center 12 of the virtual space 11. At a certain stage, the processor 210 displays an image captured by the virtual camera 14 on the monitor 130 of the HMD 120. The virtual camera 14 moves in the virtual space 11 in a similar manner in conjunction with the movement of the HMD 120 in the real space. This allows changes in the position and tilt of the HMD 120 in the real space to be reproduced in the virtual space 11 in a similar manner.

A uvw field of view coordinate system is defined for the virtual camera 14, as in the case of the HMD 120. The uvw field of view coordinate system of the virtual camera 14 in the virtual space 11 is defined so as to be linked to the uvw field of view coordinate system of the HMD 120 in real space (actual coordinate system). Therefore, when the tilt of the HMD 120 changes, the tilt of the virtual camera 14 also changes accordingly. The virtual camera 14 can also move in the virtual space 11 in conjunction with the movement in real space of the user 5 wearing the HMD 120.

The processor 210 of the computer 200 determines the field of view 15 in the virtual space 11 based on the position and inclination (reference line of sight 16) of the virtual camera 14. The field of view 15 corresponds to the area of the virtual space 11 that is viewed by the user 5 wearing the HMD 120. In other words, the position of the virtual camera 14 can be said to be the viewpoint of the user 5 in the virtual space 11.

The line of sight of user 5 detected by gaze sensor 140 is the direction in the viewpoint coordinate system when user 5 views an object. The uvw field of view coordinate system of HMD 120 is equal to the viewpoint coordinate system when user 5 views monitor 130. The uvw field of view coordinate system of virtual camera 14 is linked to the uvw field of view coordinate system of HMD 120. Therefore, in a certain aspect, the HMD system 100 can consider the line of sight of user 5 detected by gaze sensor 140 to be the line of sight of user 5 in the uvw field of view coordinate system of virtual camera 14.

[User's gaze]
Determining the line of sight of the user 5 will be described with reference to Fig. 5. Fig. 5 is a top view of the head of a user 5 wearing an HMD 120 according to an embodiment.

In one aspect, the gaze sensor 140 detects the gaze of each of the right and left eyes of the user 5. In one aspect, when the user 5 is looking at something close, the gaze sensor 140 detects the gazes R1 and L1. In another aspect, when the user 5 is looking at something far away, the gaze sensor 140 detects the gazes R2 and L2. In this case, the angle that the gazes R2 and L2 make with respect to the roll axis w is smaller than the angle that the gazes R1 and L1 make with respect to the roll axis w. The gaze sensor 140 transmits the detection result to the computer 200.

When the computer 200 receives the detection values of the gazes R1 and L1 from the gaze sensor 140 as the gaze detection result, the computer 200 identifies the gaze point N1, which is the intersection of the gazes R1 and L1, based on the detection values. On the other hand, when the computer 200 receives the detection values of the gazes R2 and L2 from the gaze sensor 140, the computer 200 identifies the intersection of the gazes R2 and L2 as the gaze point. The computer 200 identifies the gaze N0 of the user 5 based on the position of the identified gaze point N1. For example, the computer 200 detects the direction of the line that passes through the gaze point N1 and the midpoint of the line that connects the right eye R and the left eye L of the user 5 as the gaze N0. The gaze N0 is the direction in which the user 5 is actually looking with both eyes. The gaze N0 corresponds to the direction in which the user 5 is actually looking toward the field of view 15.

In another aspect, the HMD system 100 may be equipped with a television broadcast receiving tuner. With such a configuration, the HMD system 100 can display television programs in the virtual space 11.

In yet another aspect, the HMD system 100 may be equipped with a communication circuit for connecting to the Internet or a calling function for connecting to a telephone line.

[View Area]
The field of view 15 will be described with reference to Fig. 6 and Fig. 7. Fig. 6 is a diagram showing a YZ cross section of the field of view 15 in the virtual space 11 as viewed from the X direction. Fig. 7 is a diagram showing an XZ cross section of the field of view 15 in the virtual space 11 as viewed from the Y direction.

As shown in FIG. 6, the field of view 15 in the YZ cross section includes an area 18. The area 18 is defined by the position of the virtual camera 14, the reference line of sight 16, and the YZ cross section of the virtual space 11. The processor 210 defines the range including the polar angle α centered on the reference line of sight 16 in the virtual space as the area 18.

As shown in FIG. 7, the field of view 15 in the XZ cross section includes area 19. Area 19 is defined by the position of virtual camera 14, reference line of sight 16, and the XZ cross section of virtual space 11. Processor 210 defines a range including azimuth angle β centered on reference line of sight 16 in virtual space 11 as area 19. Polar angles α and β are determined according to the position of virtual camera 14 and the inclination (direction) of virtual camera 14.

In one aspect, the HMD system 100 provides the user 5 with a field of view in the virtual space 11 by displaying a field of view image 17 on the monitor 130 based on a signal from the computer 200. The field of view image 17 is an image that corresponds to a portion of the panoramic image 13 that corresponds to the field of view area 15. When the user 5 moves the HMD 120 worn on the head, the virtual camera 14 also moves in conjunction with the movement. As a result, the position of the field of view area 15 in the virtual space 11 changes. As a result, the field of view image 17 displayed on the monitor 130 is updated to an image of the panoramic image 13 that is superimposed on the field of view area 15 in the direction in which the user 5 is facing in the virtual space 11. The user 5 can view the desired direction in the virtual space 11.

In this way, the inclination of the virtual camera 14 corresponds to the line of sight (reference line of sight 16) of the user 5 in the virtual space 11, and the position at which the virtual camera 14 is positioned corresponds to the viewpoint of the user 5 in the virtual space 11. Therefore, by changing the position or inclination of the virtual camera 14, the image displayed on the monitor 130 is updated and the field of view of the user 5 is moved.

While wearing the HMD 120, the user 5 can only view the panoramic image 13 displayed in the virtual space 11, without being able to see the real world. Therefore, the HMD system 100 can give the user 5 a high sense of immersion in the virtual space 11.

In one aspect, the processor 210 may move the virtual camera 14 in the virtual space 11 in conjunction with the movement in real space of the user 5 wearing the HMD 120. In this case, the processor 210 identifies the image area (field of view area 15) to be projected onto the monitor 130 of the HMD 120 based on the position and inclination of the virtual camera 14 in the virtual space 11.

In one aspect, the virtual camera 14 may include two virtual cameras, i.e., a virtual camera for providing an image for the right eye and a virtual camera for providing an image for the left eye. An appropriate parallax is set for the two virtual cameras so that the user 5 can recognize the three-dimensional virtual space 11. In another aspect, the virtual camera 14 may be realized by a single virtual camera. In this case, an image for the right eye and an image for the left eye may be generated from an image obtained by the single virtual camera. In this embodiment, the technical idea of the present disclosure is illustrated by assuming that the virtual camera 14 includes two virtual cameras and is configured so that the roll axis (w) generated by combining the roll axes of the two virtual cameras is adapted to the roll axis (w) of the HMD 120.

[controller]
An example of the controller 300 will be described with reference to Fig. 8. Fig. 8 is a diagram showing a schematic configuration of the controller 300 according to an embodiment.

As shown in FIG. 8, in one aspect, the controller 300 may include a right controller 300R and a left controller (not shown). The right controller 300R is operated by the right hand of the user 5. The left controller is operated by the left hand of the user 5. In one aspect, the right controller 300R and the left controller are configured symmetrically as separate devices. Thus, the user 5 can freely move both the right hand holding the right controller 300R and the left hand holding the left controller. In another aspect, the controller 300 may be an integrated controller that accepts operation from both hands. The right controller 300R will be described below.

The right controller 300R includes a grip 310, a frame 320, and a top surface 330. The grip 310 is configured to be held by the right hand of the user 5. For example, the grip 310 can be held by the palm and three fingers (middle finger, ring finger, and little finger) of the right hand of the user 5.

Grip 310 includes buttons 340, 350 and a motion sensor 420. Button 340 is located on the side of grip 310 and is operated by the middle finger of the right hand. Button 350 is located on the front of grip 310 and is operated by the index finger of the right hand. In one aspect, buttons 340, 350 are configured as trigger-type buttons. Motion sensor 420 is built into the housing of grip 310. If the movements of user 5 can be detected from around user 5 by a camera or other device, grip 310 does not need to include motion sensor 420.

The frame 320 includes a number of infrared LEDs 360 arranged along its circumference. During execution of a program that uses the controller 300, the infrared LEDs 360 emit infrared light in accordance with the progress of the program. The infrared light emitted from the infrared LEDs 360 can be used to detect the positions and attitudes (tilt, direction) of the right controller 300R and the left controller. In the example shown in FIG. 8, the infrared LEDs 360 are arranged in two rows, but the number of rows is not limited to that shown in FIG. 8. An arrangement in one row or three or more rows may be used.

The top surface 330 includes buttons 370, 380 and an analog stick 390. The buttons 370, 380 are configured as push buttons. The buttons 370, 380 are operated by the thumb of the right hand of the user 5. In a certain situation, the analog stick 390 is operated in any direction within 360 degrees from the initial position (neutral position). Such operations include, for example, operations for moving an object placed in the virtual space 11.

In one aspect, the right controller 300R and the left controller include a battery for driving the infrared LED 360 and other components. The battery may be, but is not limited to, a rechargeable battery, a button type, a dry cell battery, or the like. In another aspect, the right controller 300R and the left controller may be connected, for example, to a USB interface of the computer 200. In this case, the right controller 300R and the left controller do not require a battery.

As shown in states (A) and (B) of FIG. 8, for example, the yaw, roll, and pitch directions are defined for the right hand of user 5. When user 5 extends his thumb and index finger, the direction in which the thumb extends is defined as the yaw direction, the direction in which the index finger extends is defined as the roll direction, and the direction perpendicular to the plane defined by the axis of the yaw direction and the axis of the roll direction is defined as the pitch direction.

[Server hardware configuration]
Server 600 according to the present embodiment will be described with reference to Fig. 9. Fig. 9 is a block diagram showing an example of a hardware configuration of server 600 according to an embodiment. Server 600 includes, as main components, a processor 610, a memory 620, a storage 630, an input/output interface 640, and a communication interface 650. Each component is connected to a bus 660.

The processor 610 executes a series of instructions contained in a program stored in the memory 620 or the storage 630 based on a signal provided to the server 600 or based on the satisfaction of a predetermined condition. In one aspect, the processor 610 is realized as a CPU, a GPU, an MPU, an FPGA, or other device.

Memory 620 temporarily stores programs and data. Programs are loaded, for example, from storage 630. Data includes data input to server 600 and data generated by processor 610. In one aspect, memory 620 is realized as RAM or other volatile memory.

Storage 630 permanently holds programs and data. Storage 630 is realized, for example, as a ROM, a hard disk drive, a flash memory, or other non-volatile storage device. Programs stored in storage 630 may include a program for providing a virtual space in HMD system 100, a simulation program, a game program, a user authentication program, and a program for realizing communication with computer 200. Data stored in storage 630 may include data and objects for defining the virtual space, etc.

In another aspect, the storage 630 may be realized as a removable storage device such as a memory card. In yet another aspect, instead of the storage 630 built into the server 600, a configuration may be used in which programs and data stored in an external storage device are used. With such a configuration, for example, in a situation where multiple HMD systems 100 are used, such as an amusement facility, it becomes possible to perform updates of programs and data collectively.

The input/output interface 640 communicates signals with input/output devices. In some aspects, the input/output interface 640 is realized using a USB, DVI, HDMI, or other terminal. The input/output interface 640 is not limited to the above.

The communication interface 650 is connected to the network 2 and communicates with the computer 200 connected to the network 2. In one aspect, the communication interface 650 is realized as, for example, a LAN or other wired communication interface, or a wireless communication interface such as WiFi, Bluetooth, NFC, or other wireless communication interface. The communication interface 650 is not limited to the above.

In one aspect, the processor 610 accesses the storage 630, loads one or more programs stored in the storage 630 into the memory 620, and executes a series of instructions contained in the programs. The one or more programs may include an operating system of the server 600, an application program for providing a virtual space, game software executable in the virtual space, and the like. The processor 610 may send a signal for providing the virtual space to the computer 200 via the input/output interface 640.

[HMD Control Device]
A control device for the HMD 120 will be described with reference to Fig. 10. In an embodiment, the control device is realized by a computer 200 having a known configuration. Fig. 10 is a block diagram showing the computer 200 according to an embodiment as a modular configuration.

As shown in FIG. 10, the computer 200 includes a control module 510, a rendering module 520, a memory module 530, and a communication control module 540. In one aspect, the control module 510 and the rendering module 520 are realized by the processor 210. In another aspect, multiple processors 210 may operate as the control module 510 and the rendering module 520. The memory module 530 is realized by the memory 220 or the storage 230. The communication control module 540 is realized by the communication interface 250.

The control module 510 controls the virtual space 11 provided to the user 5. The control module 510 defines the virtual space 11 in the HMD system 100 using virtual space data representing the virtual space 11. The virtual space data is stored in, for example, the memory module 530. The control module 510 may generate the virtual space data or acquire the virtual space data from the server 600 or the like.

The control module 510 places objects in the virtual space 11 using object data representing the objects. The object data is stored in the memory module 530, for example. The control module 510 may generate the object data or obtain the object data from the server 600 or the like. The objects may include, for example, an avatar object that is an avatar of the user 5, a character object, an operational object such as a virtual hand that is operated by the controller 300, landscapes including forests, mountains, and the like that are placed according to the progress of the game story, cityscapes, animals, and the like.

The control module 510 places in the virtual space 11 an avatar object of the user 5 of another computer 200 connected via the network 2. In one aspect, the control module 510 places in the virtual space 11 an avatar object of the user 5. In one aspect, the control module 510 places in the virtual space 11 an avatar object that resembles the user 5 based on an image including the user 5. In another aspect, the control module 510 places in the virtual space 11 an avatar object that has been selected by the user 5 from among multiple types of avatar objects (e.g., objects that resemble animals or deformed human objects).

The control module 510 determines the inclination of the HMD 120 based on the output of the HMD sensor 410. In another aspect, the control module 510 determines the inclination of the HMD 120 based on the output of the sensor 190 functioning as a motion sensor. The control module 510 detects the organs that make up the face of the user 5 (e.g., mouth, eyes, eyebrows) from the images of the face of the user 5 generated by the first camera 150 and the second camera 160. The control module 510 detects the movement (shape) of each detected organ.

The control module 510 detects the line of sight of the user 5 in the virtual space 11 based on a signal from the gaze sensor 140. The control module 510 detects the viewpoint position (coordinate value in the XYZ coordinate system) where the detected line of sight of the user 5 intersects with the celestial sphere of the virtual space 11. More specifically, the control module 510 detects the viewpoint position based on the line of sight of the user 5 defined in the uvw coordinate system and the position and inclination of the virtual camera 14. The control module 510 transmits the detected viewpoint position to the server 600. In another aspect, the control module 510 may be configured to transmit line of sight information representing the line of sight of the user 5 to the server 600. In such a case, the server 600 may calculate the viewpoint position based on the line of sight information received.

The control module 510 reflects the movement of the HMD 120 detected by the HMD sensor 410 in the avatar object. For example, the control module 510 detects that the HMD 120 has been tilted and tilts and positions the avatar object. The control module 510 reflects the detected movement of the facial organs in the face of the avatar object placed in the virtual space 11. The control module 510 receives gaze information of the other user 5 from the server 600 and reflects it in the gaze of the avatar object of the other user 5. In a certain aspect, the control module 510 reflects the movement of the controller 300 in the avatar object or the operation object. In this case, the controller 300 is equipped with a motion sensor, an acceleration sensor, or multiple light-emitting elements (e.g., infrared LEDs) for detecting the movement of the controller 300.

The control module 510 places an operation object in the virtual space 11 for receiving an operation by the user 5 in the virtual space 11. The user 5 operates, for example, an object placed in the virtual space 11 by operating the operation object. In one aspect, the operation object may include, for example, a hand object that is a virtual hand corresponding to the hand of the user 5. In one aspect, the control module 510 moves the hand object in the virtual space 11 in conjunction with the movement of the hand of the user 5 in the real space based on the output of the motion sensor 420. In one aspect, the operation object may correspond to the hand portion of an avatar object.

The control module 510 detects a collision when each of the objects placed in the virtual space 11 collides with another object. The control module 510 can detect, for example, the timing when a collision area of one object comes into contact with a collision area of another object, and performs a predetermined process when this detection is made. The control module 510 can detect the timing when objects are no longer in contact with each other, and performs a predetermined process when this detection is made. The control module 510 can detect when objects are in contact with each other. For example, when a control object comes into contact with another object, the control module 510 detects that the control object has come into contact with the other object, and performs a predetermined process.

In one aspect, the control module 510 controls the image display on the monitor 130 of the HMD 120. For example, the control module 510 places a virtual camera 14 in the virtual space 11. The control module 510 controls the position of the virtual camera 14 in the virtual space 11 and the tilt (direction) of the virtual camera 14. The control module 510 determines the field of view 15 according to the tilt of the head of the user 5 wearing the HMD 120 and the position of the virtual camera 14. The rendering module 520 generates a field of view image 17 to be displayed on the monitor 130 based on the determined field of view 15. The field of view image 17 generated by the rendering module 520 is output to the HMD 120 by the communication control module 540.

When the control module 510 detects speech from the user 5 using the microphone 170 from the HMD 120, it identifies the computer 200 to which voice data corresponding to the speech is to be sent. The voice data is sent to the computer 200 identified by the control module 510. When the control module 510 receives voice data from another user's computer 200 via the network 2, it outputs the voice (speech) corresponding to the voice data from the speaker 180.

The memory module 530 holds data that is used by the computer 200 to provide the virtual space 11 to the user 5. In one aspect, the memory module 530 holds space information, object information, and user information.

The spatial information holds one or more templates defined to provide the virtual space 11.

The object information includes a plurality of panoramic images 13 that constitute the virtual space 11, and object data for placing objects in the virtual space 11. The panoramic images 13 may include still images and moving images. The panoramic images 13 may include images of unreal space and images of real space. Images of unreal space include, for example, images generated by computer graphics.

The user information holds a user ID that identifies the user 5. The user ID may be, for example, an IP (Internet Protocol) address or a MAC (Media Access Control) address that is set in the computer 200 used by the user. In another aspect, the user ID may be set by the user. The user information includes a program for causing the computer 200 to function as a control device for the HMD system 100, etc.

The data and programs stored in the memory module 530 are input by the user 5 of the HMD 120. Alternatively, the processor 210 downloads the programs or data from a computer (e.g., server 600) operated by the operator providing the content, and stores the downloaded programs or data in the memory module 530.

The communication control module 540 can communicate with the server 600 and other information and communication devices via the network 2.

In one aspect, the control module 510 and the rendering module 520 may be realized using, for example, Unity (registered trademark) provided by Unity Technologies, Inc. In another aspect, the control module 510 and the rendering module 520 may be realized as a combination of circuit elements that realize each process.

Processing in computer 200 is realized by hardware and software executed by processor 210. Such software may be stored in advance on a hard disk or other memory module 530. The software may be stored on a CD-ROM or other computer-readable non-volatile data recording medium and distributed as a program product. Alternatively, the software may be provided as a downloadable program product by an information provider connected to the Internet or other network. Such software is read from the data recording medium by an optical disk drive or other data reading device, or downloaded from server 600 or other computer via communication control module 540, and then temporarily stored in a storage module. The software is read from the storage module by processor 210 and stored in RAM in the form of an executable program. Processor 210 executes the program.

[Control structure of HMD system]
The control structure of the HMD set 110 will be described with reference to Fig. 11. Fig. 11 is a sequence chart showing a part of the processing executed in the HMD set 110 according to an embodiment.

As shown in FIG. 11, in step S1110, the processor 210 of the computer 200, as the control module 510, identifies virtual space data and defines the virtual space 11.

In step S1120, the processor 210 initializes the virtual camera 14. For example, the processor 210 places the virtual camera 14 in a work area of the memory at a predefined center 12 in the virtual space 11, and points the line of sight of the virtual camera 14 in the direction in which the user 5 is facing.

In step S1130, the processor 210, as the rendering module 520, generates field of view image data for displaying the initial field of view image. The generated field of view image data is output to the HMD 120 by the communication control module 540.

In step S1132, the monitor 130 of the HMD 120 displays a field of view image based on the field of view image data received from the computer 200. The user 5 wearing the HMD 120 can recognize the virtual space 11 by visually recognizing the field of view image.

In step S1134, the HMD sensor 410 detects the position and inclination of the HMD 120 based on the multiple infrared lights emitted from the HMD 120. The detection results are output to the computer 200 as motion detection data.

In step S1140, the processor 210 determines the field of view direction of the user 5 wearing the HMD 120 based on the position and tilt contained in the motion detection data of the HMD 120.

In step S1150, the processor 210 executes the application program and places objects in the virtual space 11 based on the instructions contained in the application program.

In step S1160, the controller 300 detects an operation by the user 5 based on a signal output from the motion sensor 420, and outputs detection data representing the detected operation to the computer 200. In another aspect, the operation of the controller 300 by the user 5 may be detected based on an image from a camera arranged around the user 5.

In step S1170, the processor 210 detects the operation of the controller 300 by the user 5 based on the detection data acquired from the controller 300.

In step S1180, the processor 210 generates field of view image data based on the operation of the controller 300 by the user 5. The generated field of view image data is output to the HMD 120 by the communication control module 540.

In step S1190, the HMD 120 updates the field of view image based on the received field of view image data and displays the updated field of view image on the monitor 130.

[Avatar Object]
Avatar objects according to the present embodiment will be described with reference to Figs. 12(A) and (B). Hereinafter, avatar objects of each user 5 of the HMD sets 110A and 110B will be described. Hereinafter, the user of the HMD set 110A will be referred to as user 5A, the user of the HMD set 110B as user 5B, the user of the HMD set 110C as user 5C, and the user of the HMD set 110D as user 5D. A is added to the reference symbol of each component related to the HMD set 110A, B is added to the reference symbol of each component related to the HMD set 110B, C is added to the reference symbol of each component related to the HMD set 110C, and D is added to the reference symbol of each component related to the HMD set 110D. For example, the HMD 120A is included in the HMD set 110A.

Figure 12 (A) is a schematic diagram showing a situation in which each HMD 120 provides a virtual space 11 to a user 5 in a network 2. Computers 200A to 200D provide virtual spaces 11A to 11D to users 5A to 5D, respectively, via HMDs 120A to 120D. In the example shown in Figure 12 (A), virtual space 11A and virtual space 11B are configured with the same data. In other words, computer 200A and computer 200B share the same virtual space. In virtual space 11A and virtual space 11B, there exist an avatar object 6A of user 5A and an avatar object 6B of user 5B. Although avatar object 6A in virtual space 11A and avatar object 6B in virtual space 11B each wear an HMD 120, this is for ease of explanation, and in reality, these objects do not wear an HMD 120.

In one aspect, the processor 210A may position a virtual camera 14A that captures a field of view image 17A of the user 5A at the eye position of the avatar object 6A.

Figure 12 (B) is a diagram showing a field of view image 17A of user 5A in Figure 12 (A). Field of view image 17A is an image displayed on monitor 130A of HMD 120A. This field of view image 17A is an image generated by virtual camera 14A. An avatar object 6B of user 5B is displayed in field of view image 17A. Although not specifically shown, avatar object 6A of user 5A is similarly displayed in the field of view image of user 5B.

In the state of FIG. 12(B), user 5A can communicate with user 5B through dialogue via virtual space 11A. More specifically, the voice of user 5A picked up by microphone 170A is transmitted to HMD 120B of user 5B via server 600 and output from speaker 180B provided on HMD 120B. The voice of user 5B is transmitted to HMD 120A of user 5A via server 600 and output from speaker 180A provided on HMD 120A.

The movements of user 5B (the movements of HMD 120B and controller 300B) are reflected by processor 210A in avatar object 6B placed in virtual space 11A. This allows user 5A to recognize the movements of user 5B through avatar object 6B.

Figure 13 is a sequence chart showing a part of the processing executed in the HMD system 100 according to the present embodiment. Although the HMD set 110D is not shown in Figure 13, the HMD set 110D operates in the same manner as the HMD sets 110A, 110B, and 110C. In the following description, A will be added to the reference number of each component related to the HMD set 110A, B will be added to the reference number of each component related to the HMD set 110B, C will be added to the reference number of each component related to the HMD set 110C, and D will be added to the reference number of each component related to the HMD set 110D.

In step S1310A, the processor 210A in the HMD set 110A acquires avatar information for determining the movement of the avatar object 6A in the virtual space 11A. The avatar information includes information about the avatar, such as, for example, movement information, face tracking data, and voice data. The movement information includes information indicating the temporal change in the position and tilt of the HMD 120A, and information indicating the hand movement of the user 5A detected by the motion sensor 420A, etc. The face tracking data includes data specifying the position and size of each part of the face of the user 5A. The face tracking data includes data indicating the movement of each organ constituting the face of the user 5A and gaze data. The voice data includes data indicating the voice of the user 5A acquired by the microphone 170A of the HMD 120A. The avatar information may include information specifying the avatar object 6A, or the user 5A associated with the avatar object 6A, and information specifying the virtual space 11A in which the avatar object 6A exists. The information specifying the avatar object 6A or the user 5A includes a user ID. The information for identifying the virtual space 11A in which the avatar object 6A exists includes a room ID. The processor 210A transmits the avatar information acquired as described above to the server 600 via the network 2.

In step S1310B, the processor 210B in the HMD set 110B acquires avatar information for determining the movement of the avatar object 6B in the virtual space 11B, similar to the processing in step S1310A, and transmits it to the server 600. Similarly, in step S1310C, the processor 210C in the HMD set 110C acquires avatar information for determining the movement of the avatar object 6C in the virtual space 11C, and transmits it to the server 600.

In step S1320, the server 600 temporarily stores the player information received from each of the HMD sets 110A, 110B, and 110C. The server 600 integrates the avatar information of all users (users 5A to 5C in this example) associated with the common virtual space 11 based on the user ID and room ID, etc., included in each piece of avatar information. The server 600 then transmits the integrated avatar information to all users associated with the virtual space 11 at a predetermined timing. This executes a synchronization process. This synchronization process allows the HMD sets 110A, 110B, and 110C to share each other's avatar information at approximately the same timing.

Next, based on the avatar information transmitted from the server 600 to each of the HMD sets 110A to 110C, each of the HMD sets 110A to 110C executes the process of steps S1330A to S1330C. The process of step S1330A corresponds to the process of step S1180 in FIG. 11.

In step S1330A, the processor 210A in the HMD set 110A updates the information of the avatar objects 6B and avatar objects 6C of the other users 5B and 5C in the virtual space 11A. Specifically, the processor 210A updates the position, orientation, etc. of the avatar object 6B in the virtual space 11 based on the movement information included in the avatar information transmitted from the HMD set 110B. For example, the processor 210A updates the information (position, orientation, etc.) of the avatar object 6B included in the object information stored in the memory module 530. Similarly, the processor 210A updates the information (position, orientation, etc.) of the avatar object 6C in the virtual space 11 based on the movement information included in the avatar information transmitted from the HMD set 110C.

In step S1330B, the processor 210B in the HMD set 110B updates the information of the avatar objects 6A and 6C of the users 5A and 5C in the virtual space 11B, similar to the processing in step S1330A. Similarly, in step S1330C, the processor 210C in the HMD set 110C updates the information of the avatar objects 6A and 6B of the users 5A and 5B in the virtual space 11C.

[Module detailed configuration]
The details of the module configuration of computer 200 will be described with reference to Fig. 14. Fig. 14 is a block diagram showing the detailed configuration of modules of computer 200 according to an embodiment.

As shown in FIG. 14, the control module 510 includes a virtual camera control module 1421, a field of view determination module 1422, a reference gaze identification module 1423, a face organ detection module 1424, a motion detection module 1425, a virtual space definition module 1426, a virtual object generation module 1427, an operation object control module 1428, and an avatar control module 1429. The rendering module 520 includes a field of view image generation module 1438. The memory module 530 holds space information 1431, object information 1432, user information 1433, and face information 1434.

The virtual camera control module 1421 places the virtual camera 14 in the virtual space 11. The virtual camera control module 1421 controls the placement position of the virtual camera 14 in the virtual space 11 and the orientation (tilt) of the virtual camera 14. The field of view determination module 1422 defines the field of view 15 according to the orientation of the head of the user wearing the HMD 120 and the placement position of the virtual camera 14. The field of view image generation module 1438 generates the field of view image 17 to be displayed on the monitor 130 based on the determined field of view 15.

The reference gaze identification module 1423 identifies the gaze of the user 5 based on a signal from the gaze sensor 140. The face organ detection module 1424 detects the organs (e.g., mouth, eyes, eyebrows) that make up the face of the user 5 from the images of the user's 5's face generated by the first camera 150 and the second camera 160. The movement detection module 1425 detects the movement (shape) of each organ detected by the face organ detection module 1424.

The virtual space definition module 1426 defines the virtual space 11 in the HMD system 100 by generating virtual space data representing the virtual space 11.

The virtual object generation module 1427 generates objects to be placed in the virtual space 11. The objects may include, for example, landscapes including forests, mountains, and other things, animals, etc. that are placed according to the progress of the game story.

The operation object control module 1428 places an operation object in the virtual space 11 for receiving operations by the user in the virtual space 11. The user operates the operation object to, for example, operate an object placed in the virtual space 11. In one aspect, the operation object may include, for example, a hand object corresponding to the hand of the user wearing the HMD 120. In one aspect, the operation object may correspond to the hand portion of an avatar object described below.

The avatar control module 1429 generates data for placing in the virtual space 11 the avatar objects of users of other computers 200 connected via the network 2. In one aspect, the avatar control module 1429 generates data for placing in the virtual space 11 the avatar object of the user 5. In one aspect, the avatar control module 1429 generates an avatar object that imitates the user 5 based on an image including the user 5. In another aspect, the avatar control module 1429 generates data for placing in the virtual space 11 an avatar object that has been selected by the user 5 from among multiple types of avatar objects (e.g., objects imitating animals and deformed human objects).

The avatar control module 1429 reflects the movement of the HMD 120 detected by the HMD sensor 410 in the avatar object. For example, the avatar control module 1429 detects that the HMD 120 has been tilted and generates data for tilting and positioning the avatar object. In a certain aspect, the avatar control module 1429 reflects the movement of the controller 300 in the avatar object. In this case, the controller 300 includes a motion sensor, an acceleration sensor, or a plurality of light-emitting elements (e.g., infrared LEDs) for detecting the movement of the controller 300. The avatar control module 1429 reflects the movement of the facial organs detected by the movement detection module 1425 in the face of the avatar object placed in the virtual space 11. In other words, the avatar control module 1429 reflects the facial movement of the user 5A in the avatar object.

The control module 510 detects a collision when each of the objects placed in the virtual space 11 collides with another object. The control module 510 can detect, for example, the timing when one object touches another object, and performs a predetermined process when this detection is made. The control module 510 can detect the timing when the objects are no longer in contact with each other, and performs a predetermined process when this detection is made. The control module 510 can detect when an object is in contact with another object. Specifically, the operation object control module 1428 detects that an operation object and another object have touched each other, and performs a predetermined process.

The memory module 530 holds data used by the computer 200 to provide the virtual space 11 to the user 5. In one aspect, the memory module 530 holds space information 1431, object information 1432, user information 1433, and face information 1434.

The spatial information 1431 holds one or more templates defined to provide the virtual space 11.

Object information 1432 holds content to be played in virtual space 11, objects used in the content, and information (e.g., location information) for placing the objects in virtual space 11. The content may include, for example, games, content depicting scenery similar to that of the real world, etc.

The user information 1433 includes programs for causing the computer 200 to function as a control device for the HMD system 100, application programs that use each piece of content stored in the object information 1432, and the like.

Facial information 1434 holds pre-stored templates for facial organ detection module 1424 to detect facial organs of user 5. In one aspect, facial information 1434 holds mouth template 1435, eye template 1436, and eyebrow template 1437. Each template may be an image corresponding to an organ that constitutes a face. For example, mouth template 1435 may be an image of a mouth. Each template may include multiple images.

[360-degree video shooting]
Next, the shooting of a 360-degree video according to an embodiment will be described. FIG. 15 is a diagram showing an outline of a configuration related to a 360-degree camera according to an embodiment. In an embodiment, the external device 700 shown in FIG. 1 includes a 360-degree camera 1539. The 360-degree camera 1539 is configured to be able to communicate with the server 600 and the computer 200 of the HMD set 110 via the network 2. A plurality of 360-degree cameras 1539 may be provided. The 360-degree camera 1539 shoots an omnidirectional video (360-degree video), which is an image in all directions at the installation position in real space. The installation position of the 360-degree camera 1539 may be indoors or outdoors.

The 360-degree camera 1539 may be a camera capable of capturing an entire celestial sphere using two ultra-wide-angle lenses, or may be a camera capable of capturing a hemisphere using one ultra-wide-angle lens. The 360-degree camera 1539 captures 360-degree video in all directions at the position where it is installed. Note that the 360-degree camera 1539 may be, for example, a regular hexahedron with one camera on each side to capture images in all directions, and the videos captured by the total of six cameras on each side may be synthesized to obtain a 360-degree video. The 360-degree camera 1539 may also be a camera that captures three-dimensional 360-degree video that allows stereoscopic viewing due to parallax.

In this embodiment, a display object is placed in the virtual space 11, and a 360-degree video captured by the 360-degree camera 1539 is displayed on this display object, so that the rendering module 520 generates field of view image data as described above, and displays the 360-degree video on the monitor 130 of the HMD 120. In one embodiment, the 360-degree video captured by the 360-degree camera 1539 may be displayed on the monitor 130 by being superimposed on the field of view image data in the visual field coordinate system in step S1180 of FIG. 11. Also, in one embodiment, the 360-degree video captured by the 360-degree camera 1539 may be displayed on the monitor 130 by being used as the field of view image data output in step S1180 of FIG. 11.

The virtual camera 14 moves in the virtual space 11 in conjunction with the movement of the HMD 120 in the real space. As a result, changes in the position and inclination of the HMD 120 in the real space are reproduced in the virtual space 11 as changes in the movement of the virtual camera 14. The 360-degree video displayed on the display object in the virtual space 11 is used as an image that constitutes the panoramic image 13, and the area of the 360-degree video captured by the virtual camera 14 moves in conjunction with the movement of the HMD 120 in the real space.

[360-degree video display]
Next, the display of the 360-degree video on the monitor 130 of the HMD 120 will be described. When the user 5 uses the HMD set 110 to watch a 360-degree video captured by the 360-degree camera 1539, there are cases where the user 5 wants to pay attention to the behavior of a target moving object (e.g., a favorite girl) among the moving objects (e.g., people) appearing in the 360-degree video and wants to always watch the target moving object. In this case, the user 5 moves the head to follow the target moving object and moves the field of view 15. However, for example, if the moving object moves to a position beyond the range of motion of the neck, the user 5 must stand up and change the direction of the body if he or she is watching the 360-degree video while sitting, which is inconvenient. Therefore, in one embodiment, the target moving object is set as a tracking object, and the virtual space 11 is moved so that the tracking object is in the center of the field of view image 17, thereby improving the convenience of the user 5 when watching the 360-degree video. In one embodiment, a desired moving object is set as a tracked object, and the virtual space 11 is moved so that the tracked object is included in the field of view 15, thereby improving the convenience when the user 5 watches the 360-degree video. Note that the control for moving the virtual space 11 can be performed independently of the movement of the HMD 120. Note that moving the virtual space 11 means moving the relative positional relationship between the virtual camera 14 and the virtual space 11.

Figure 16 is a diagram illustrating an example of how to move virtual space 11. In one embodiment, when the zenith portion of virtual space 11, which has a hemispherical shape as shown in Figure 16, is set to zenith 1641, virtual space 11 is rotated around the axis of a line connecting zenith 1641 and center 12. According to this embodiment, by rotating virtual space 11, it is possible to control the tracked object to be located within field of view 15.

Figure 17 is a diagram showing the positional relationship between the field of view and the tracked object, and shows a case where the tracked object is located within the field of view. Figure 18 is a diagram showing the positional relationship between the field of view and the tracked object, and shows a case where the tracked object is located outside the field of view. Figures 17 and 18 are plan views of the virtual space 11 viewed from above, i.e., from the Y direction. In Figures 17 and 18, reference numeral 1742 denotes the tracked object. In one embodiment, as shown in Figure 17, when the tracked object 1742 is located within the field of view 15, the virtual space 11 is not moved. Also, as shown in Figure 18, when the tracked object 1742 is located outside the field of view 15, the virtual space 11 is rotated in the direction indicated by the arrow 1843 around the line connecting the zenith 1641 and the center 12 as an axis, and the rotation of the virtual space 11 is stopped when the tracked object 1742 reaches the center of the field of view image 17.

Figure 19 is a flow chart showing part of the processing executed in an HMD set according to an embodiment, which is related to display control of a 360-degree video captured by a 360-degree camera. Initial settings are performed in step S1944. In the initial settings in step S1944, the auto-tracking mode can be set. The auto-tracking mode is a mode in which, when the tracking object 1742 moves out of the field of view 15 or some other trigger occurs, the virtual space 11 is automatically moved so that the tracking object 1742 is located within the field of view 15. The user 5 can register whether or not to set the auto-tracking mode by operating the controller 300 while referring to the display on the monitor 130.

In addition, in the initial setting of step S1944, the tracking target can be set. When a 360-degree video of a person is displayed, the person may be the tracking target, and when a 360-degree video of an animal such as a pet dog or cat is displayed, the animal may be the tracking target. When a person is the tracking target, the tracking target may be set to track a specific person, or to track a man, or to track a woman. When an animal is the tracking target, the tracking target may be set to track a specific animal, or to track a certain type of animal. In some embodiments, the tracking target does not need to be set in the initial setting of step S1944.

In step S1945 following step S1944, it is determined whether or not the automatic tracking mode is set. If the automatic tracking mode is not set (step S1945: No), the process ends. If the automatic tracking mode is set in step S1945 (step S1945: Yes), the process proceeds to step S1946, where the automatic tracking process is executed. The automatic tracking process in step S1946 is described below with reference to FIG. 20.

Figure 20 is a flow chart showing an example of the automatic tracking process shown in step S1946 of Figure 17. First, in step S2051, a tracking target identification process is performed. If a tracking target has been set in the initial setting in step S1944 of Figure 19, in the tracking target identification process in step S2051, the tracking target set in step S1944 is identified as the tracking target. Identifying the tracking target means acquiring identification information that can distinguish the tracking target from other moving objects. As this identification information, for example, facial recognition of the person who is the tracking target can be performed from an image captured by the 360-degree camera 1539, and the result of this facial recognition can be used as the identification information. In this case, the tracking target set in step S1944 can also be distinguished from other moving objects by facial recognition and set as the tracking target.

In one embodiment, the color of the clothes of the tracked object can be used as identification information that allows the tracked object to be distinguished from other moving objects. For example, in an image captured by the 360-degree camera 1539, the color of the pixel 30 pixels below the face of the tracked object can be detected as the color of the clothes of the tracked object. In one embodiment, the results of facial recognition of the tracked object and the color of the clothes can be used as identification information that allows the tracked object to be distinguished from other moving objects. According to this embodiment, when the tracked objects are twins and it is difficult to distinguish them from their faces alone, it is possible to distinguish the twins by having the twins wear clothes of different colors in advance.

In one embodiment, a person who is a moving object appearing in a 360-degree video captured by a 360-degree camera 1539 may be able to earn a monetary income by appearing in the 360-degree video. In this case, the amount of income may be increased or decreased depending on the number of times the person appears as a tracked object. In this way, a person appearing in the 360-degree video will actively change the color of their clothes so that they are distinguishable from other people, thereby improving the accuracy of identifying tracked objects.

If no tracking object is set in step S1944, the moving object to be identified as the tracking object in step S2051 can be determined as follows. As described above, the HMD set 110 can detect the gaze of the user 5 by the gaze sensor 140. In one embodiment, if the gaze of the user 5 is directed at the same moving object for a predetermined period of time (e.g., one minute) or more, the moving object is identified as the tracking object. Also, in one embodiment, if the gaze of the user 5 is directed at a certain moving object when the moving object moves out of the field of view 15, the moving object is identified as the tracking object.

In step S2052 following step S2051, a tracking object tracking process is performed. In the tracking object tracking process in step S2052, the tracking object identified in step S2051 is tracked. In other words, the tracking object, which is a moving object whose identification information was acquired in step S2051, is tracked to see where it is located within the field of view 15.

In step S2053 following step S2052, it is determined whether the tracking object being tracked in step S2052 is outside the field of view 15. If the tracking object is not outside the field of view 15, i.e., if the tracking object is located within the field of view 15 (step S2053: No), the process returns to step S2052 and continues.

If the tracked object is outside the field of view 15 in step S2053 (step S2053: Yes), the process proceeds to step S2054, where virtual space movement processing is performed. Once the virtual space movement processing in step S2054 is completed, the process returns to step S2052 and continues. The virtual space movement processing in step S2054 is described below.

In one embodiment, the virtual space 11 is divided radially into equal parts with the line connecting the center 12 and the zenith 1641 as the center (divided radially at equal angles). FIG. 21 shows an example of dividing the virtual space 11 into three equal parts. FIG. 21 is a plan view of the virtual space 11 from above, i.e., from the Y direction. The virtual space 11 in FIG. 21 is divided radially into areas 2155, 2156, and 2157 with the line connecting the center 12 and the zenith 1641 as the center. The number of divisions of the virtual space 11 may be four or more. The division of the virtual space 11 may also be divided radially at different angles. In this embodiment, the virtual space movement process in step S2052 moves the virtual space 11 by swapping the positions of the areas 2155, 2156, and 2157 into which the virtual space 11 shown in FIG. 21 is divided. For example, the area 2157 is moved to the position where the area 2155 is in FIG. 21, the area 2156 is moved to the position where the area 2157 is in FIG. 21, and the area 2155 is moved to the position where the area 2156 is in FIG. 21. For example, the area 2156 is moved to the position where the area 2155 is in FIG. 21, the area 2157 is moved to the position where the area 2156 is in FIG. 21, and the area 2155 is moved to the position where the area 2157 is in FIG. 21. In this embodiment, the virtual space 11 is moved so that the tracking object is always within the field of view 15. In one embodiment, the virtual space 11 is not moved in units of the size of the areas 2155, 2156, and 2157, but for example, the virtual space 11 is rotated around the line connecting the center 12 and the zenith 1641 until the tracking object is in the center of the field of view 15. Note that in order to prevent VR sickness, it is desirable to reduce the time and number of times the virtual space 11 is moved.

In one embodiment, the direction of rotation of the virtual space 11 around the line connecting the center 12 and the zenith 1641 is the direction that reduces the shortest distance between the current position of the tracked object and the center of the field of view 15.

In one embodiment, in the virtual space movement process of step S2052, when the tracked object goes outside the field of view 15 and the HMD sensor 410 detects a rotation of the HMD 120 in the yaw angle direction of a predetermined angle (e.g., 45 degrees) or more but the tracked object is not included in the field of view 15 (i.e., when the user 5 rotates his/her head left or right by more than a predetermined angle but the tracked object is not included in the field of view 15), the virtual space 11 is rotated around a line connecting the center 12 and the zenith 1641 in the direction opposite to the rotation direction of the HMD 120 detected by the HMD sensor 410 so that the tracked object is within the field of view 15.

In one embodiment, in the virtual space movement process of step S2052, when the user 5 is rotating his/her head to follow the tracked object and the tracked object moves outside the field of view 15, the scene displayed on the monitor 130 of the HMD 120 is switched, and the virtual space 11 is rotated around the line connecting the center 12 and the zenith 1641 so that the tracked object is within the field of view 15.

In one embodiment, the virtual space movement process in step S2052 switches the display of the display object in the virtual space 11 from the 360-degree video currently displayed to a blackout image of a solid black screen when the tracked object moves out of the field of view 15. After that, the virtual space 11 is rotated around the axis of the line connecting the center 12 and the zenith 1641 so that the tracked object is within the field of view 15, and when the tracked object comes within the field of view 15, the display of the display object in the virtual space 11 is switched from the blackout image to the 360-degree video.

In addition, in one embodiment, machine learning such as recursive type is used to recognize the face of the tracked object, so that the accuracy of face recognition can be improved as data is accumulated.

The tracked object may be a CG object such as an avatar object placed in the virtual space 11.

In the above embodiment, a virtual space (VR space) in which the user is immersed by the HMD has been described as an example, but a see-through HMD may be used as the HMD. In this case, a field of view image in which a part of the image constituting the virtual space is synthesized in the real space visually recognized by the user through the see-through HMD may be output to provide the user with a virtual experience in an augmented reality (AR) space or a mixed reality (MR) space. In this case, an action may be exerted on a target object in the virtual space based on the movement of the user's hand instead of the operation object. Specifically, the processor may specify coordinate information of the position of the user's hand in the real space, and may define the position of the target object in the virtual space in relation to the coordinate information in the real space. This allows the processor to grasp the positional relationship between the user's hand in the real space and the target object in the virtual space, and to execute processing corresponding to the above-mentioned collision control between the user's hand and the target object. As a result, it becomes possible to exert an action on the target object based on the movement of the user's hand.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in different embodiments.

(composition)
The technical features disclosed above can be summarized as follows.

(Configuration 1)
According to one embodiment, a program causes a processor to execute the following steps: defining a virtual space; accepting input of an image captured by a 360-degree camera; placing a virtual viewpoint in the virtual space; placing a display object in the virtual space; displaying the input image on the display object; identifying a tracked object in the virtual space; detecting head movement of a user associated with a head-mounted device; controlling a field of view from the virtual viewpoint in accordance with the head movement; if the tracked object is not included in the field of view from the virtual viewpoint, controlling the rotation of the virtual space so that the tracked object is included in the field of view from the virtual viewpoint; and displaying a field of view image corresponding to the field of view from the virtual viewpoint on the head-mounted device.
(Configuration 2)
According to one embodiment, in the program according to configuration 1, the step of controlling the rotation of the virtual space controls the rotation of the virtual space so that the tracked object is located at the center of a field of view from the virtual viewpoint.
(Configuration 3)
According to one embodiment, in the program described in configuration 1, the step of controlling the rotation of the virtual space divides the virtual space into a plurality of regions, and controls the rotation of the virtual space so that an area among the plurality of regions in which the tracked object exists is included within the field of view from the virtual viewpoint.
(Configuration 4)
According to one embodiment, in the program described in any one of configurations 1 to 3, the displaying step displays a blackout image on the head-mounted device when the tracked object is not included in the field of view from the virtual viewpoint, and displays the field of view image corresponding to the field of view from the virtual viewpoint on the head-mounted device when the tracked object is included in the field of view from the virtual viewpoint.
(Configuration 5)
According to one embodiment, in the program described in any one of configurations 1 to 4, the step of controlling the rotation of the virtual space rotates the virtual space in the other yaw direction around a line connecting the zenith and center of the virtual space as an axis when the tracked object remains in a state where it is not included in the field of view from the virtual viewpoint even when the user's head rotates a predetermined angle in one direction of a yaw angle from a state where the tracked object is not included in the field of view from the virtual viewpoint.
(Configuration 6)
According to one embodiment, in the program described in any one of configurations 1 to 5, when the user's head is moving in a direction that moves the tracked object to the center of the field of view from the virtual viewpoint and the tracked object is no longer included in the field of view from the virtual viewpoint, the displaying step displays an image on the head-mounted device that is different from the field of view image corresponding to the field of view from the virtual viewpoint, and the controlling rotation of the virtual space controls the rotation of the virtual space so that the tracked object is included in the field of view from the virtual viewpoint when the image different from the field of view image is displayed on the head-mounted device.
(Configuration 7)
According to one embodiment, in the program described in any one of configurations 1 to 6, the tracking object is a person, and the identifying step identifies the tracking object using an image captured by the 360-degree camera.
(Configuration 8)
According to one embodiment, in the program according to configuration 7, the identifying step includes recognizing a face of a person and identifying the tracking target object based on the recognized face.
(Configuration 9)
According to one embodiment, in the program according to configuration 8, the identifying step performs machine learning in recognizing a person's face.
(Configuration 10)
According to an embodiment, in the program according to configuration 8 or 9, the identifying step further recognizes a color of the person's clothes, and identifies the tracked object based on the recognized face and clothing colors.
(Configuration 11)
According to one embodiment, in the program according to configuration 7, the identifying step recognizes a color of clothing of the person, and identifies the tracked object based on the recognized color of clothing.
(Configuration 12)
According to an embodiment, in the program according to any one of configurations 1 to 6, the identifying step identifies a moving object moving within the virtual space as the tracked object.
(Configuration 13)
According to an embodiment, the program according to any one of configurations 1 to 12 further causes the processor to execute a step of tracking the tracking target identified in the identifying step.
(Configuration 14)
According to one embodiment, in the program described in configuration 13, the identifying step identifies a person, who is the tracking target, by facial recognition, and the tracking step tracks feature points of the person identified in the identifying step.
(Configuration 15)
According to one embodiment, a method executed by a processor includes the steps of: defining a virtual space; accepting input of an image captured by a 360-degree camera; arranging a virtual viewpoint in the virtual space; arranging a display object in the virtual space; displaying the input image on the display object; identifying a tracked object in the virtual space; detecting head movement of a user associated with a head-mounted device; controlling a field of view from the virtual viewpoint in response to the head movement; if the tracked object is not included in the field of view from the virtual viewpoint, controlling the rotation of the virtual space so that the tracked object is included in the field of view from the virtual viewpoint; and displaying a field of view image corresponding to the field of view from the virtual viewpoint on the head-mounted device.
(Configuration 16)
According to one embodiment, an information processing device includes a processor and a memory storing a program, and the program causes the processor to execute the steps of: defining a virtual space; accepting input of an image captured by a 360-degree camera; arranging a virtual viewpoint in the virtual space; arranging a display object in the virtual space; displaying the input image on the display object; identifying a tracked object in the virtual space; detecting head movement of a user associated with a head-mounted device; controlling a field of view from the virtual viewpoint in accordance with the movement of the head; if the tracked object is not included in the field of view from the virtual viewpoint, controlling the rotation of the virtual space so that the tracked object is included in the field of view from the virtual viewpoint; and displaying a field of view image corresponding to the field of view from the virtual viewpoint on the head-mounted device.

The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

2...Network, 5...User, 6...Avatar object, 11...Virtual space, 12...Center, 14...Virtual camera, 15...Viewing area, 100...HMD system, 110...HMD set, 130...Monitor, 170...Microphone, 180...Speaker, 190...Sensor, 200...Computer, 210...Processor, 220...Memory, 230...Storage, 240...Input/output interface, 250...Communication interface, 300...Controller, 310...Grip, 320...Frame, 340, 350, 370, 380...Button, 390...Analog stick, 410...HMD sensor, 420...Motion sensor, 430...Display, 510...Control module, 520...Rendering module, 530...Memory module, 540...Communication control module, 600...Server, 610...Processor, 620...Memory, 630...Storage, 640...Input/output interface, 650...Communication interface, 1421...Virtual camera control module, 1422...Field of view area determination module, 1423...Reference gaze identification module, 1424...Movement detection module, 1424...Facial organ detection module, 1425...Movement detection module, 1426...Virtual space definition module, 1427...Virtual object generation module, 1428...Operation object control module, 1429...Avatar control module, 1431...Spatial information, 1432...Object information, 1433...User information, 1434...Facial information, 1435...Mouth template, 1438...Field of view image generation module.

Claims (7)

On the computer,
Defining a virtual space;
A step of receiving an input of an image captured by a predetermined camera that captures an image of a real space;
Placing a virtual viewpoint in the virtual space;
Placing a display object in the virtual space;
displaying the input image on the display object;
identifying a tracked object within the virtual space;
Detecting a user's movement based on a device worn by the user;
controlling a view from the virtual viewpoint in response to detected user movement;
If the tracked object is not included within a field of view from the virtual viewpoint, controlling a rotation of the virtual space so that the tracked object is included within a field of view from the virtual viewpoint;
displaying on the device a view image corresponding to a view from the virtual viewpoint;
Run the command,
the step of controlling the rotation of the virtual space includes dividing the virtual space into a plurality of regions, and controlling the rotation of the virtual space so that a region among the plurality of regions in which the tracked object exists is included within a field of view from the virtual viewpoint.
program. The display step includes temporarily displaying a predetermined image on the device when the tracked object is not included in a field of view from the virtual viewpoint, and displaying the field of view image corresponding to the field of view from the virtual viewpoint on the device when the tracked object is included in a field of view from the virtual viewpoint.
The program according to claim 1 . The step of controlling the rotation of the virtual space includes, when the tracked object remains out of the field of view from the virtual viewpoint even when the device rotates a predetermined angle in one direction of a yaw angle from a state in which the tracked object is out of the field of view from the virtual viewpoint, rotating the virtual space in the other direction of the yaw angle around an axis of a line connecting the zenith and center of the virtual space.
3. The program according to claim 1 or 2 . the tracked object is a person,
The step of identifying includes:
Identifying the tracking target using an image captured by the predetermined camera.
The program according to any one of claims 1 to 3 . The step of identifying includes:
Recognize people's faces,
Identifying the tracked object based on the recognized face;
The program according to claim 4 . The step of identifying includes:
Machine learning for facial recognition
The program according to claim 5 . A processor;
A memory for storing a program;
Equipped with
The program causes the processor to:
Defining a virtual space;
A step of receiving an input of an image captured by a predetermined camera that captures an image of a real space;
Placing a virtual viewpoint in the virtual space;
Placing a display object in the virtual space;
displaying the input image on the display object;
identifying a tracked object within the virtual space;
Detecting a user's movement based on a device worn by the user;
controlling a view from the virtual viewpoint in response to detected user movement;
If the tracked object is not included within a field of view from the virtual viewpoint, controlling a rotation of the virtual space so that the tracked object is included within a field of view from the virtual viewpoint;
displaying on the device a view image corresponding to a view from the virtual viewpoint;
Run the command,
the step of controlling the rotation of the virtual space includes dividing the virtual space into a plurality of regions, and controlling the rotation of the virtual space so that a region among the plurality of regions in which the tracked object exists is included within a field of view from the virtual viewpoint.
Information processing device.

Images