JP2017224244A - Display control method, and program for causing computer to implement display control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display control method capable of limiting visibility of a non-created region in a virtual space.SOLUTION: A display control method in a system with a head mounted display (HMD) comprises: generating virtual space data defining a virtual space, which includes a virtual camera 300 equipped with an image acquisition unit 301 and includes at least one object F having a non-created region NR; causing the HMD to display a visual field image on the basis of the visual field of the virtual camera 300 and the virtual space data; adjusting the orientation of the image acquisition unit 301 in accordance with the orientation of the HMD; moving the virtual camera 300 in accordance with movement input to the virtual camera 300; and, when it is determined that the image acquisition unit 301 has entered the non-created region NR, causing the HMD to display a mask image B that makes the non-created region NR invisible.SELECTED DRAWING: Figure 9

Description

  The present disclosure relates to a display control method and a program for causing a computer to execute the display control method.

  A head-mounted display (HMD: Head-Mounted Display) that is mounted on the user's head and can display a virtual space image as a virtual space such as a virtual reality (VR) space or an augmented reality (AR) space. It has been known. Patent Document 1 discloses a design support system with a viewpoint information display function for supporting design of an object such as a building using a virtual space. In Patent Document 1, as a means for changing the viewpoint position in real time, in addition to the conventional means in which a user walks through the virtual space in the virtual space, the viewpoint position is input on the plan view display unit. The means for instantaneously moving the viewpoint position by changing the viewing angle, or changing the magnification (scale) when converting the movement amount of the user in the real space into the movement amount in the virtual space by changing the viewing angle is described. ing.

JP 2000-172740 A

  When creating a game space by placing static objects such as background images and building objects in a three-dimensional virtual space, it is usually assumed that the game space is visually recognized in order to reduce the load of rendering processing. It is not assumed that the back side of the non-game space (for example, the back side of the background image or the inside of the static object) is not created, that is, rendered as a game screen. However, in such a game space, as described in Patent Document 1, when the viewpoint position is changed according to the movement of the user or the change of the viewing angle in the virtual space, the game space that is not supposed to be rendered. Even the back side (hereinafter referred to as “non-production area”) may be visually recognized by the user.

  An object of this indication is to provide the display control method which can restrict | limit the visual recognition of the non-production area | region in virtual space. Moreover, this indication aims at providing the program for making a computer perform the said display control method.

According to one aspect of the present disclosure, a display control method in a system including a head mounted display,
The display control method is
(A) generating virtual space data defining a virtual space including a virtual camera including an image acquisition unit and at least one object having a non-production area;
(B) displaying a visual field image on the head mounted display based on the visual field of the virtual camera and the virtual space data;
(C) adjusting the orientation of the image acquisition unit in accordance with the orientation of the head mounted display;
(D) moving the virtual camera in response to a movement input to the virtual camera;
(E) When it is determined that the image acquisition unit has entered the non-production area, a step of displaying a mask image on the head-mounted display so that the non-production area is not visually recognized;
including.

  According to the present disclosure, it is possible to provide a display control method capable of restricting visual recognition of a non-production area in a virtual space.

It is the schematic which shows the head mounted display (HMD) system which concerns on this embodiment. It is a figure which shows the head of the user with which HMD was mounted | worn. It is a figure which shows the hardware constitutions of a control apparatus. It is a flowchart which shows the process which displays a visual field image on HMD. It is xyz space figure which shows an example of virtual space. (A) is a yx plan view of the virtual space shown in FIG. 4, and (b) is a zx plan view of the virtual space shown in FIG. 4. It is a figure which shows an example of the visual field image displayed on HMD. It is a flowchart for demonstrating a process when the image acquisition part of a virtual camera enters into the non-production area | region of a target object. (A) is a figure which shows the state which the image acquisition part of the virtual camera entered into the non-production area | region of a target object, (b) is a figure which shows the visual field image in the case of (a). (A) is a figure which shows the state which a part of image acquisition part of the virtual camera entered into the non-production area | region of a target object, (b) is a figure which shows the visual field image in the case of (a). (A) shows a state in which a part of the image acquisition unit of the left-eye virtual camera among the left-eye virtual camera and the right-eye virtual camera arranged in the virtual space has entered the non-production area of the target object. (B) is a figure which shows the visual field image for left eyes and the visual field image for right eyes in the case of (a). FIG. 12 is a flowchart for explaining processing when the image acquisition unit of one virtual camera enters the non-production area of the target object in the state shown in FIG. 11.

[Description of Embodiments Presented by the Present Disclosure]
An overview of an embodiment indicated by the present disclosure will be described.
(1) A display control method in a system including a head mounted display,
The display control method is
(A) generating virtual space data defining a virtual space including a virtual camera including an image acquisition unit and at least one object having a non-production area;
(B) displaying a visual field image on the head mounted display based on the visual field of the virtual camera and the virtual space data;
(C) adjusting the orientation of the image acquisition unit in accordance with the orientation of the head mounted display;
(D) moving the virtual camera in response to a movement input to the virtual camera;
(E) When it is determined that the image acquisition unit has entered the non-production area, a step of displaying a mask image on the head-mounted display so that the non-production area is not visually recognized;
including.

  According to the above method, when the image acquisition unit of the virtual camera enters the non-production area, the mask image is displayed so as to cover the visual field image, so that the non-production is performed even when the virtual camera enters the target object. The area is not visually recognized.

  (2) The mask image may include at least one of a dark image, a blank image, and a surface image of the object.

  By performing the image processing as described above for displaying the mask image, it is possible to easily limit the visibility of the non-production area.

  (3) In the step (d), a display ratio of the mask image in the visual field image may be determined according to an area ratio of the image acquisition unit determined to have entered the non-production area. .

  According to the above method, the mask image is displayed so as to cover the field-of-view image only in the part where the image acquisition unit of the virtual camera enters the target object, and therefore, user-driven natural image display can be performed.

(4) The virtual camera includes a left-eye virtual camera and a right-eye virtual camera,
In the step (d), if it is determined that one of the image acquisition units of either the left-eye virtual camera or the right-eye virtual camera has entered the non-production area, the left-eye visual field image The mask image may be displayed so as to cover both the right-eye visual field image.

  According to the above method, even when only the image acquisition unit of one virtual camera enters the target, the display of the mask image on the left eye view image and the display of the mask image on the right eye view image are linked. By doing so, it is possible to reliably limit the visibility of the non-production area.

(5) The step (d)
When at least one of the left-eye virtual camera and the right-eye virtual camera approaches the object, parallax information between the left-eye virtual camera and the right-eye virtual camera is acquired. Steps,
Determining an area ratio of the image acquisition unit included in the non-production area when the image acquisition unit of the one virtual camera enters the non-production area;
And determining a display ratio of the mask image with respect to the visual field image generated by the other virtual camera based on the parallax information and the area ratio.

  According to the above method, the mask image display on the left eye visual field image and the mask image display on the right eye visual field image can be appropriately interlocked.

  (6) A program according to an embodiment is a program for causing a computer to execute the display control method according to any one of (1) to (5).

  According to this configuration, it is possible to provide a program capable of limiting the visual recognition of the non-production area in the virtual space.

[Details of Embodiments Presented by the Present Disclosure]
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In addition, about the member which has the same reference number as the member already demonstrated in description of this embodiment, the description is not repeated for convenience of explanation.

  FIG. 1 is a schematic diagram showing a head-mounted display (hereinafter simply referred to as HMD) system 1 according to an embodiment (hereinafter simply referred to as this embodiment) shown in the present disclosure. As shown in FIG. 1, the HMD system 1 includes an HMD 110 mounted on the head of the user U, a position sensor 130, a control device 120, and an external controller 320.

  The HMD 110 includes a display unit 112, an HMD sensor 114, and a headphone 116. Note that a speaker or headphones independent of the HMD 110 may be used without providing the headphones 116 on the HMD 110.

  The display unit 112 includes a non-transmissive display device configured to completely cover the field of view (field of view) of the user U wearing the HMD 110. Thereby, the user U can immerse in the virtual space by viewing only the visual field image displayed on the display unit 112. Note that the display unit 112 may include a display unit for the left eye that is projected onto the left eye of the user U and a display unit for the right eye that is projected onto the right eye of the user U.

  The HMD sensor 114 is mounted in the vicinity of the display unit 112 of the HMD 110. The HMD sensor 114 includes at least one of a geomagnetic sensor, an acceleration sensor, and a tilt sensor (such as an angular velocity sensor and a gyro sensor), and can detect various movements of the HMD 110 mounted on the head of the user U.

  The position sensor 130 is composed of, for example, a position tracking camera, and is configured to detect the position of the HMD 110. The position sensor 130 is communicably connected to the control device 120 by wireless or wired communication, and is configured to detect information on the position, inclination, or light emission intensity of a plurality of detection points (not shown) provided in the HMD 110. . The position sensor 130 may include an infrared sensor and a plurality of optical cameras.

  The control device 120 acquires the position information of the HMD 110 based on the information acquired from the position sensor 130, and wears the position of the virtual camera in the virtual space and the HMD 110 in the real space based on the acquired position information. Thus, the position of the user U can be accurately associated.

  Next, with reference to FIG. 2, a method for acquiring information related to the position and inclination of the HMD 110 will be described. FIG. 2 is a diagram illustrating the head of the user U wearing the HMD 110. Information regarding the position and inclination of the HMD 110 that is linked to the movement of the head of the user U wearing the HMD 110 can be detected by the position sensor 130 and / or the HMD sensor 114 mounted on the HMD 110. As shown in FIG. 2, three-dimensional coordinates (uvw coordinates) are defined centering on the head of the user U wearing the HMD 110. The vertical direction in which the user U stands upright is defined as the v axis, the direction orthogonal to the v axis and connecting the center of the display unit 112 and the user U is defined as the w axis, and the direction perpendicular to the v axis and the w axis is the u axis. It prescribes as The position sensor 130 and / or the HMD sensor 114 is an angle around each uvw axis (that is, a yaw angle indicating rotation about the v axis, a pitch angle indicating rotation about the u axis, and a center about the w axis). The inclination determined by the roll angle indicating rotation) is detected. The control device 120 determines angle information for controlling the visual axis of the virtual camera that defines the visual field information based on the detected angle change around each uvw axis.

  Next, the hardware configuration of the control device 120 will be described with reference to FIG. FIG. 3 is a diagram illustrating a hardware configuration of the control device 120. As shown in FIG. 3, the control device 120 includes a control unit 121, a storage unit 123, an I / O (input / output) interface 124, a communication interface 125, and a bus 126. The control unit 121, the storage unit 123, the I / O interface 124, and the communication interface 125 are connected to each other via a bus 126 so as to communicate with each other.

  The control device 120 may be configured as a personal computer, a tablet, or a wearable device separately from the HMD 110, or may be mounted inside the HMD 110. In addition, some functions of the control device 120 may be mounted on the HMD 110, and the remaining functions of the control device 120 may be mounted on another device separate from the HMD 110.

  The control unit 121 includes a memory and a processor. The memory includes, for example, a ROM (Read Only Memory) in which various programs are stored, a RAM (Random Access Memory) having a plurality of work areas in which various programs executed by the processor are stored, and the like. The processor is, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), and / or a GPU (Graphics Processing Unit), and a program specified from various programs incorporated in the ROM is expanded on the RAM. It is comprised so that various processes may be performed in cooperation with.

  In particular, the controller 121 develops a display control program (to be described later) for causing the computer to execute the display control method according to the present embodiment on the RAM, and executes the program in cooperation with the RAM. May control various operations of the control device 120. The control unit 121 provides a virtual space (view image) to the display unit 112 of the HMD 110 by executing a predetermined application (game program) stored in the memory or the storage unit 123. Thereby, the user U can be immersed in the virtual space provided on the display unit 112.

  The storage unit (storage) 123 is a storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a USB flash memory, and is configured to store programs and various data. The storage unit 123 may incorporate a display control program. In addition, a user authentication program, a game program including data on various images and objects, and the like may be stored. Furthermore, a database including tables for managing various data may be constructed in the storage unit 123.

  The I / O interface 124 is configured to connect the position sensor 130, the HMD 110, and the external controller 320 to the control device 120 in a communicable manner. For example, the I / O interface 124 includes a USB (Universal Serial Bus) terminal, a DVI (Digital Visual Bus), and the like. An interface) terminal, an HDMI (registered trademark) (high-definition multimedia interface) terminal, and the like. Note that the control device 120 may be wirelessly connected to each of the position sensor 130, the HMD 110, and the external controller 320.

  The communication interface 125 is configured to connect the control device 120 to a communication network 3 such as a LAN (Local Area Network), a WAN (Wide Area Network), or the Internet. The communication interface 125 includes various wired connection terminals for communicating with an external device via the communication network 3 and various processing circuits for wireless connection. The communication interface 125 conforms to a communication standard for communicating via the communication network 3. Configured to fit.

  Next, processing for displaying a field-of-view image on the HMD 110 will be described with reference to FIGS. 4 to 6. FIG. 4 is a flowchart showing a process for displaying the visual field image V on the HMD 110. FIG. 5 shows an xyz space diagram showing an example of the virtual space 200. 6A is a yx plan view of the virtual space 200 shown in FIG. 5, and FIG. 6B is a zx plan view of the virtual space 200 shown in FIG.

As shown in FIG. 4, in step S1, the control unit 121 (see FIG. 3) generates virtual space data indicating the virtual space 200 in which the virtual camera 300 is arranged. As shown in FIGS. 5 and 6, the virtual space 200 is defined as a celestial sphere centered on the center position 21 (only the upper half celestial sphere is shown in FIGS. 5 and 6). In the virtual space 200, an xyz coordinate system with the center position 21 as the origin is set. In the initial state of the HMD system 1, the virtual camera 300 is disposed at the center position 21 of the virtual space 200.
The uvw coordinate system that defines the visual field of the virtual camera 300 is determined so as to be linked to the uvw coordinate system that is defined around the head of the user U in the real space. Further, the virtual camera 300 may be moved in the virtual space 200 in conjunction with the movement of the user U wearing the HMD 110 in the real space.

  Next, in step S2, the control unit 121 specifies the field of view CV (see FIG. 6) of the virtual camera 300. Specifically, the control unit 121 acquires information on the position and inclination of the HMD 110 based on data indicating the state of the HMD 110 transmitted from the position sensor 130 and / or the HMD sensor 114. Next, the control unit 121 determines the position and orientation of the virtual camera 300 in the virtual space 200 based on information regarding the position and inclination of the HMD 110. Next, the control unit 121 determines a reference line of sight L corresponding to the visual axis of the virtual camera 300 from the position and orientation of the virtual camera 300, and specifies the field of view CV of the virtual camera 300 from the determined reference line of sight L. Here, the visual field CV of the virtual camera 300 coincides with a part of the virtual space 200 visible to the user U wearing the HMD 110 (in other words, a part of the virtual space 200 displayed on the HMD 110). To match). The field of view CV is a first region CVa set as an angular range of the polar angle α around the reference line of sight L in the xy plane shown in FIG. 6A, and in the xz plane shown in FIG. 6B. And a second region CVb set as an angle range of the azimuth angle β with the reference line of sight L as the center.

  As described above, the control unit 121 can specify the visual field CV of the virtual camera 300 based on the data from the position sensor 130 and / or the HMD sensor 114. Here, when the user U wearing the HMD 110 moves, the control unit 121 specifies the visual field CV of the virtual camera 300 based on the data indicating the movement of the HMD 110 transmitted from the position sensor 130 and / or the HMD sensor 114. be able to. That is, the control unit 121 can move the visual field CV according to the movement of the HMD 110.

  Next, in step S <b> 3, the control unit 121 generates visual field image data indicating the visual field image displayed on the display unit 112 of the HMD 110. Specifically, the control unit 121 generates visual field image data based on virtual space data defining the virtual space 200 and the visual field CV of the virtual camera 300.

  Next, in step S <b> 4, the control unit 121 displays a field image on the display unit 112 of the HMD 110 based on the field image data. As described above, the visual field CV of the virtual camera 300 is changed according to the movement of the user U wearing the HMD 110, and the visual field image V displayed on the HMD 110 is changed, so that the user U is immersed in the virtual space 200. be able to.

FIG. 7 shows an example of the visual field image V displayed on the display unit 112 of the HMD 110.
In the visual field image V shown in FIG. 7, the wall portion of the room is composed of a wall image W (an example of an object) that is a background image attached to a celestial sphere (see FIGS. 5 and 6) that forms a virtual space 200. ing. In addition, a furniture object F (an example of an object) such as a table, a sofa, or a bed is arranged inside the room surrounded by the wall image W. When creating such a field-of-view image V, the back side of the wall image W and the inside of the furniture object F are not normally viewed by the user, and therefore are not assumed to be rendered as a game screen. In the present embodiment, an area that is not supposed to be rendered as such a game screen is referred to as a non-production area NR (see FIG. 9A).

  Next, referring to FIG. 8 and FIG. 9A and FIG. 9B, the object (for example, furniture object) in which the image acquisition unit 301 of the virtual camera 300 has a non-production area in accordance with the change in the field of view CV of the HMD 110. The process when entering F) will be described. Note that the configuration of the image acquisition unit 301 is not limited as long as it can define a field of view determined by the position or orientation of the virtual camera 300, but in this example, for simplicity of description, for example, Description will be made assuming that the lens of the virtual camera 300 as shown in FIG.

  As shown in FIG. 8, in step S <b> 11, the control unit 121 determines whether or not the user U wearing the HMD 110 moves or whether or not an operation for moving the virtual camera 300 is input from the controller 320. The presence / absence of a movement input to the virtual camera 300 is determined. When the movement input to the virtual camera 300 is received (Yes in Step S11), the control unit 121 moves the virtual camera 300 in the virtual space based on the movement input in Step S12.

  Next, in step S13, the control unit 121 determines whether or not the image acquisition unit 301 of the virtual camera 300 has entered the non-production area of the target object. Then, as shown in FIG. 9A, when the image acquisition unit 301 enters, for example, the non-production area NR of the furniture object F (Yes in step S13), the control unit 121 determines that the non-production area NR is not in step S14. The area ratio of the image acquisition unit 301 that has entered the production area NR is determined.

  Next, in step S15, the control unit 121 determines the display ratio of the mask image displayed on the display unit 112 of the HMD 110 in accordance with the area ratio of the image acquisition unit 301 that has entered the non-production area NR. In step S16, the control unit 121 generates mask image data according to the determined display ratio, and causes the display unit 112 of the HMD 110 to display the mask image according to the generated mask image data. For example, when the image acquisition unit 301 of the virtual camera 300 has completely entered the non-production area NR, as shown in FIG. 9B, a dark image (black image) in which the entire view image V is a mask image. ) Covered with B. On the other hand, as shown in FIG. 10A, when only a part of the image acquisition unit 301 of the virtual camera 300 enters the non-production region NR, the image acquisition unit 301 that has entered the non-production region NR. Depending on the area ratio, only a part of the visual field image V is covered with the dark image B as shown in FIG. The mask image is not limited to the dark image B shown in FIGS. 9B and 10B, and may be a white paper image or a surface image of the furniture object F.

  Thus, according to the present embodiment, when the image acquisition unit 301 enters the non-production area NR, the mask image is displayed on the display unit 112 of the HMD 110 so as to cover the visual field image V. Thereby, it can be restricted that the virtual camera 300 enters the furniture object F in response to an unexpected movement input to the virtual camera 300 and the non-production area NR is visually recognized. For this reason, it is not necessary to create the assumed game space, and the load of rendering processing can be reduced. Note that the same processing as described above may be performed not only when the virtual camera 300 enters the furniture object F but also when the virtual camera 300 passes through the wall image W that is the background image.

  In addition, the display ratio of the mask image in the field-of-view image V is determined according to the area ratio of the image acquisition unit 301 determined to have entered the non-production area NR. As a result, the mask image is displayed so as to cover only the portion of the image acquisition unit 301 that has entered the non-production area NR so as to cover the visual field image V, so that a user-driven natural image display can be performed.

  In addition, in order to implement various processes executed by the control unit 121 by software, a display control program for causing a computer (processor) to execute the display control method according to the present embodiment is incorporated in the storage unit 123 or the ROM in advance. It may be. Alternatively, the display control program can be a magnetic disk (HDD, floppy disk), optical disk (CD-ROM, DVD-ROM, Blu-ray disk, etc.), magneto-optical disk (MO, etc.), flash memory (SD card, USB memory, It may be stored in a computer-readable storage medium such as SSD. In this case, the program stored in the storage medium is incorporated into the storage unit 123 by connecting the storage medium to the control device 120. Then, the display control program incorporated in the storage unit 123 is loaded on the RAM, and the control unit 121 executes the display control method according to the present embodiment by executing the loaded program.

  The display control program may be downloaded from a computer on the communication network 3 via the communication interface 125. Similarly in this case, the downloaded program is incorporated in the storage unit 123.

  As mentioned above, although embodiment of this indication was described, the technical scope of this invention should not be limitedly interpreted by description of this embodiment. This embodiment is an example, and it is understood by those skilled in the art that various modifications can be made within the scope of the invention described in the claims. The technical scope of the present invention should be determined based on the scope of the invention described in the claims and the equivalents thereof.

  In the above embodiment, as illustrated in FIG. 9B, the description has been made assuming that there is one virtual camera arranged in the virtual space. For example, as illustrated in FIG. The virtual camera may include a left-eye virtual camera 300L and a right-eye virtual camera 300R having different viewpoint positions. In this case, the control unit 121 generates left-eye visual field image data based on the virtual space data and the visual field of the left-eye virtual camera 300L, and based on the virtual space data and the visual field of the right-eye virtual camera 300R. The right eye field-of-view image data is generated. Then, based on the left-eye view image data and the right-eye view image data, the control unit 121 displays the left-eye view image VL and the right-eye on the display unit 112 of the HMD 110 as illustrated in FIG. By displaying the visual field image VR, the user U can visually recognize the visual field image as a three-dimensional image.

Next, with reference to FIGS. 11A, 11 </ b> B, and 12, the visual field image display control process according to the present embodiment when the left-eye virtual camera 300 </ b> L and the right-eye virtual camera 300 </ b> R are used. explain.
As illustrated in FIG. 12, in step S21, the control unit 121 determines at least the left-eye virtual camera 300L and the right-eye virtual camera 300R based on the movement input to the left-eye virtual camera 300L and the right-eye virtual camera 300R. It is determined whether one of the objects having the non-production area NR is close to a predetermined distance (for example, the furniture object F). When it is determined that at least one of the virtual cameras 300L and 300R has approached the furniture object F up to a predetermined distance (Yes in step S21), the control unit 121 determines in step S22 that the left eye at that time point. The parallax (parallax information) between the virtual camera for camera 300L and the virtual camera for the right eye 300R is specified. For example, as shown in FIG. 11A, the parallax between the left-eye virtual camera 300L and the right-eye virtual camera 300R is the center of the image acquisition unit 301L of the left-eye virtual camera 300L and the right-eye virtual camera. It is specified by the distance L1 from the center of the 300R image acquisition unit 301R.

  Next, in step S23, the control unit 121 determines whether or not at least one of the left-eye virtual camera 300L and the right-eye virtual camera 300R has entered the non-production area NR of the furniture object F. 11A, for example, when the image acquisition unit 301L of the left-eye virtual camera 300L enters the non-production area NR of the furniture object F (Yes in step S22), the control unit 121 In step S24, the area ratio of the image acquisition unit 301L of the left-eye virtual camera 300L that has entered the non-production area NR is determined, and the display ratio of the mask image with respect to the left-eye visual field image is determined.

  Next, the control unit 121 displays the mask image display ratio with respect to the right-eye visual field image based on the parallax L1 specified in step S22 and the area ratio of the image acquisition unit 301L of the left-eye virtual camera 300L determined in step S24. To decide. Specifically, in step S25, the control unit 121 determines the display ratio of the mask image with respect to the right eye view image by subtracting the parallax L1 from the display ratio of the mask image with respect to the left eye view image (step S26). ). In step S26, the control unit 121 generates mask image data in accordance with the display ratio of the mask image with respect to the left-eye visual field image and the right-eye visual field image determined in step S24 and step S26, respectively. The mask image B is displayed on the left eye field image and the right eye field image displayed on the display unit 112 of the HMD 110 according to the image data. For example, if the parallax when the image acquisition unit 301L of the left-eye virtual camera 300L is determined to be close to the furniture object F is L1, the image acquisition unit that has entered the non-production area NR for the left-eye viewing image VL. While the mask image B is displayed according to the area ratio of 301L, for the right eye visual field image VR, a predetermined ratio (for example, calculated based on the parallax L1 from the display ratio of the mask image B with respect to the left eye visual field image VL) The mask image B is displayed at a display ratio in a state where L2) in the right eye visual field image VR in FIG. 11B is subtracted.

  Thus, when the virtual camera includes the left-eye virtual camera 300L and the right-eye virtual camera 300R, when at least one of the virtual cameras 300L and 300R enters the non-production area NR, In addition to displaying the mask image for the visual field image corresponding to the virtual camera, the mask image is displayed for the visual field image corresponding to the other virtual camera. In this way, by appropriately interlocking the mask image display on the left-eye visual field image and the mask image display on the right-eye visual field image, control is performed so that only the part that has entered the non-production area NR is deprived of the field of view. be able to. Furthermore, by correcting the display ratio of the mask image with respect to the other virtual camera using the parallax information between the left-eye virtual camera 300L and the right-eye virtual camera 300R, the non-defective 3D image display is not impaired. The visual recognition of the production area NR can be limited.

1: HMD system 3: Communication network 21: Center position 110: Head mounted display (HMD)
112: Display unit 114: HMD sensor 116: Headphone 120: Control device 121: Control unit 123: Storage unit 124: I / O interface 125: Communication interface 126: Bus 130: Position sensor 200: Virtual space 300: Virtual camera 300L: Left-eye virtual camera 300R: right-eye virtual camera 301: image acquisition unit B: mask image F: furniture object NR: non-production area U: user V: visual field image VL: left-eye visual field VR: visual field for right eye Image W: Wall image (object)

Claims (6)

A display control method in a system including a head mounted display,
(A) generating virtual space data defining a virtual space including a virtual camera including an image acquisition unit and at least one object having a non-production area;
(B) displaying a visual field image on the head mounted display based on the visual field of the virtual camera and the virtual space data;
(C) adjusting the orientation of the image acquisition unit in accordance with the orientation of the head mounted display;
(D) moving the virtual camera in response to a movement input to the virtual camera;
(E) When it is determined that the image acquisition unit has entered the non-production area, a step of displaying a mask image on the head-mounted display so that the non-production area is not visually recognized;
Including a display control method.   The display control method according to claim 1, wherein the mask image includes at least one of a dark image, a blank image, and a surface image of the object.   2. The display ratio of the mask image in the field-of-view image is determined in the step (d) according to an area ratio of the image acquisition unit determined to have entered the non-production area. Display control method. The virtual camera includes a left-eye virtual camera and a right-eye virtual camera,
In the step (d), if it is determined that one of the image acquisition units of either the left-eye virtual camera or the right-eye virtual camera has entered the non-production area, the left-eye visual field image The display control method according to any one of claims 1 to 3, wherein the mask image is displayed so as to cover both the visual field image for right eye and the visual field image for right eye. The step (d)
When at least one of the left-eye virtual camera and the right-eye virtual camera approaches the object, parallax information between the left-eye virtual camera and the right-eye virtual camera is acquired. Steps,
Determining an area ratio of the image acquisition unit included in the non-production area when the image acquisition unit of the one virtual camera enters the non-production area;
The display control method according to claim 4, further comprising: determining a display ratio of the mask image with respect to a visual field image generated by the other virtual camera based on the parallax information and the area ratio.   A program for causing a computer to execute the display control method according to any one of claims 1 to 5.

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