JP6332658B1 - Display control apparatus and program - Google Patents

Abstract

A virtual space display using binocular parallax is made easier to see. A display control apparatus for controlling display of a head mounted display including a display unit capable of displaying a view field image representing a view field from a virtual viewpoint in a virtual space as a stereoscopic image using binocular parallax. A detection unit that detects a visual field direction from a virtual viewpoint based on information on the direction of the display unit, and a visual field image generation that generates a visual field image based on the visual field direction detected by the detection unit with reference to the virtual visual line direction from the virtual viewpoint A visual field generated by the visual field image generation unit, a change unit that changes the virtual visual line direction based on a positional relationship between the virtual object and the specific object included in the visual field image among the specific objects arranged in the virtual space, and the visual field generated by the visual field image generation unit A display control unit that displays an image on the display unit. [Selection] Figure 7

Description

  The present invention relates to a display control device and a program.

  There is a head mounted display (HMD) that can be mounted on a user's head and can display an image in a virtual space on a display placed in front of the user's eyes (for example, Patent Document 1).

Japanese Patent No. 5767386

  However, virtual space display (VR (Virtual Reality) display) using binocular parallax using HMD has become very realistic, but there is a difference from how it looks in reality. Due to this difference, the display of the virtual space may be difficult to see, or VR sickness may occur.

  It is an object of some aspects of the present invention to provide a display control device and a program that can make a virtual space display using binocular parallax easier to see.

  Another object of another aspect of the present invention is to provide a display control device and a program that can achieve the effects described in the embodiments described later.

  In order to solve the above-described problem, an aspect of the present invention provides a head including a display unit capable of displaying a visual field image representing a visual field from a virtual viewpoint in a virtual space as a stereoscopic image using binocular parallax. A display control device that controls display of a mount display, the detection unit detecting a visual field direction from the virtual viewpoint based on information on the direction of the display unit, and the visual field based on the visual field direction detected by the detection unit A view image generation unit that generates an image based on a virtual line-of-sight direction from the virtual viewpoint; and a positional relationship between a specific object included in the view image and a virtual viewpoint among specific objects arranged in the virtual space A change unit that changes the virtual line-of-sight direction based on the display, and a display control unit that causes the display unit to display the view image generated by the view image generation unit. A control device.

  One embodiment of the present invention is a program for causing a computer to function as the display control device.

The figure which shows the usage example of HMD which concerns on 1st Embodiment. Explanatory drawing of the visual field in the virtual space which concerns on 1st Embodiment. The figure which shows an example of a visual field image. The figure which shows an example of the object arrange | positioned in virtual space. The figure which shows an example of the visual field image in the virtual space shown in FIG. Explanatory drawing explaining that the distance of a right eye and a left eye influences a virtual gaze direction. Explanatory drawing explaining the change of the gaze direction of the visual field image which concerns on 1st Embodiment. The figure which shows an example of the visual field image which has not performed the change process to a near distance virtual visual line direction. The figure which shows an example of the visual field image which performed the change process to a near distance virtual gaze direction. The figure which shows an example of the hardware constitutions of the HMD system which concerns on 1st Embodiment. The block diagram which shows an example of a function structure of the game device which concerns on 1st Embodiment. 6 is a flowchart illustrating an example of a view field image generation process according to the first embodiment. The flowchart which shows an example of the visual field image generation process which concerns on 2nd Embodiment. The flowchart which shows an example of the visual field image generation process which concerns on 3rd Embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[First embodiment]
A first embodiment of the present invention will be described.
In the present embodiment, a display in an HMD (Head Mounted Display) capable of stereoscopically viewing a 3D (three-dimensional) virtual space will be described as an example. For example, the HMD is worn on the user's head and a view image representing a view from a virtual viewpoint in a virtual space may be referred to as binocular parallax (hereinafter simply referred to as “parallax”) between the right eye and the left eye. ) Can be displayed as a stereoscopic image. The virtual viewpoint is a viewpoint corresponding to the position of the user's eyes in the virtual space. For example, when the user plays a game using the virtual space, the viewpoint of the user (player) or the user (player) character is shown. . A character is an object that can be displayed and represents, for example, a person, an animal, a monster, a robot, an object (for example, a vehicle) or the like appearing in a game. For example, the character becomes a user's operation target or moves based on the user's operation or game processing. Further, the HMD is equipped with a sensor for detecting the movement and tilt of the HMD such as a gyro sensor, detects a change in the head and tilt of the user's head, and the virtual space according to the change. The view image of is displayed. For example, the visual field image displayed on the HMD changes to a right visual field image in the virtual space when the user's head is directed rightward, and changes to an upward visual image in the virtual space when the user heads upward. It is possible to give the user an immersive feeling as if they were on the spot.

  FIG. 1 is a diagram illustrating a usage example of the HMD according to the present embodiment. This figure shows a state in which the HMD 10 is worn on the user's head. Here, the vertical direction in which the user stands upright is the Z axis, the axis is orthogonal to the Z axis, and the direction orthogonal to the display screen of the HMD 10 from the user is the X axis, and the axis is orthogonal to the Z axis and the X axis. Is the Y axis. In the display screen of the HMD 10, the vertical direction corresponds to the Z-axis direction, the horizontal direction corresponds to the Y-axis direction, and the depth direction corresponds to the X-axis direction.

  A change in the rotation direction about the Z axis is also called a change in the yaw direction (or left and right direction), and a change in the rotation direction about the Y axis is called a change in the pitch direction (or up and down direction). A change in the rotation direction about the X axis is also referred to as a change in the roll direction.

  FIG. 2 is an explanatory diagram of the field of view in the virtual space according to the present embodiment. In this figure, when the virtual viewpoint K is the intersection (origin) of the X axis, Y axis, and Z axis, and the view direction from the virtual viewpoint K (the center direction of the view) is the X axis direction, the view from the virtual viewpoint K The range of the field of view image (that is, the field of view) that represents the yaw angle α (the inner angle between the broken line a and the broken line b and the inner angle between the broken line c and the broken line d) and the pitch angle centered on the field of view direction (X-axis direction). This is a range determined by β (inner angle between the broken line a and the broken line d and inner angle between the broken line b and the broken line c). Here, the yaw angle α and the pitch angle β are angles set in advance as the angle of view of the visual field image of the virtual space displayed on the HMD system 1. For example, the field of view at the point x1 on the X axis is a quadrangle whose vertexes are intersections a1, b1, c1, and d1 of the surface L1 orthogonal to the X axis at the point x1 and the broken lines a, b, c, and d indicating the field of view. It will be enclosed.

  That is, the range inside the yaw angle α and the pitch angle β centered on the visual field direction (X-axis direction) is the visual field, and the object disposed in the virtual space is disposed in this visual field. Objects (structures, plants, characters, etc.) are displayed stereoscopically as a view field image. When the user's head changes in the pitch direction or the yaw direction, the visual field direction changes from the X-axis direction to the pitch direction or the yaw direction according to the change, and the visual field also changes in the pitch direction or the yaw direction. When the user's head changes in the roll direction, the view direction rotates in the roll direction while the view direction remains in the X-axis direction.

  Generally, a view field image is displayed with distortion and expansion / contraction. FIG. 3 is a diagram illustrating an example of a view field image. The example shown in the figure is a view image of an indoor swimming pool facility, but a straight line such as a course rope, a course line, or a spectator seat has a greater degree of image distortion or expansion as the distance from the center of the view image increases. Become. This is also called a so-called volume distortion image, and is a phenomenon that physically occurs as wide-angle distortion. Here, the center of the field-of-view image is the center of the field of view, and as an example, corresponds to the position in the virtual line-of-sight direction from the virtual viewpoint. The virtual line-of-sight direction is a direction that indicates the point of the line of sight from the virtual viewpoint, and corresponds to the center (optical axis direction) of the lens of the virtual camera that captures the virtual space. That is, the virtual line-of-sight direction is the direction with the least distortion in the view field image. In the example shown in FIG. 3, since the position in the virtual visual line direction is the center of the visual field image, the center of the visual field image has the least distortion and expansion / contraction, and the degree of image distortion and expansion / contraction increases as the distance from the center increases. When the virtual line-of-sight direction is deviated from the center of the field-of-view image, the place of deviation is least distorted and stretched. That is, the range of the view image is determined by the view direction, and the degree of distortion and expansion / contraction is determined with the virtual view direction as a reference.

  Here, with reference to FIG.4 and FIG.5, the distortion of a general visual field image is demonstrated. FIG. 4 is a diagram illustrating an example of objects arranged in the virtual space. In this figure, the virtual space from the upper direction (upward direction of the Z axis) is represented, and the object H1 exists ahead of the virtual visual line direction from the virtual viewpoint K, and the direction (Z) away from the virtual visual line direction. The object H2 exists ahead of the axis (rotated to the right by the angle θ). The object H1 and the object H2 are plates having the same rectangular surface, and both of the objects face the virtual viewpoint K (orientation in which the direction orthogonal to the object plane is the virtual viewpoint K) ( In FIG. 4, since it is the figure seen from the upper direction, the thickness of a board is represented.

  FIG. 5 is a diagram illustrating an example of a view field image in the virtual space illustrated in FIG. 4. In the illustrated field-of-view image G10, the object H1 is present in the direction of the virtual line of sight from the virtual viewpoint K, and thus is displayed while maintaining the actual rectangle. On the other hand, when the user views the object H2 without moving the HMD 10, since the user is away from the virtual line-of-sight direction, the object H2 is displayed with being slightly distorted and stretched rather than the rectangle. As described above, the visual field image has a degree of distortion and expansion / contraction as the distance from the virtual line-of-sight direction becomes larger with reference to the virtual line-of-sight direction (see the broken line in the figure).

  However, when the user views the object H2 in the real space, such a situation does not occur, and it looks almost rectangular like the object H1. This is caused by a difference between the virtual visual line direction in the virtual space and the actual visual line direction of the user's eyes. In the case of displaying a visual field image in the virtual space, it actually looks different from the reality as described above. Due to the difference from the actual appearance, the display of the virtual space may be difficult to see or may cause VR sickness.

  This problem becomes more prominent as the distance between the virtual viewpoint K and the object displayed in the view field image is shorter. Specifically, this is noticeable when the user sees an object that is close enough that the distance between the right eye and the left eye of the user greatly affects the virtual visual line direction.

  FIG. 6 is an explanatory diagram for explaining that the distance between the right eye and the left eye affects the virtual line-of-sight direction as the distance from the object is shorter. This figure shows a virtual space from the upper direction (upward direction of the Z axis), and the object H3 exists at a position relatively far from the virtual viewpoint K, and the object H4 exists at a position relatively close. Yes. If the virtual viewpoint corresponding to the user's left eye is the left eye virtual viewpoint K (L) and the virtual viewpoint corresponding to the right eye is the right eye virtual viewpoint K (R), the virtual line-of-sight direction of the left eye view image is The left eye virtual visual line direction KL1 along the X-axis direction from the left eye virtual viewpoint K (L). Further, the virtual visual line direction of the right-eye view image is the right eye virtual visual line direction KR1 along the X-axis direction from the right eye virtual viewpoint K (R). Here, the left-eye virtual line-of-sight direction KL1 and the right-eye virtual line-of-sight direction KR1 are set parallel to the X-axis direction and parallel to each other, but may be set to directions close to each other with a slight angle. Each of the left eye virtual line-of-sight direction KL1 and the right eye virtual line-of-sight direction KR1 is a virtual line-of-sight direction used as a reference when generating the left-eye view image and the right-eye view image.

  In addition, the illustrated angles “m” and “n” indicate the difference in angle between the virtual line-of-sight direction and the user's actual line-of-sight direction with respect to the objects H3 and H4. The actual line-of-sight directions for the object H3 at a relatively far position are the line-of-sight direction KL2 (the line of sight of the left eye) and the line of sight KR2 (the line of sight of the right eye), and the actual line of sight with respect to the object H4 at a relatively close position. Are the gaze direction KL3 (the gaze direction of the left eye) and the gaze direction KR3 (the gaze direction of the right eye). The difference in angle between the actual viewing direction KL2 and the left eye virtual viewing direction KL1 with respect to the object H3 is “m”, and the difference in angle between the actual viewing direction KL3 and the left eye virtual viewing direction KL1 with respect to the object H4 is “n”. It is. Since the difference in angle between the virtual line-of-sight direction and the actual line-of-sight direction is larger in the object H4 located closer to the object H3 (m <n), the object H4 is further away from the virtual line-of-sight direction, causing distortion and expansion / contraction of the object. The degree of increases. Here, only the angle difference between the left eye side is shown, but the angle difference between the right eye virtual visual line direction KR1 direction on the right eye side and the actual visual line direction KR3 is also at a position closer to the object H3. An object H4 becomes larger, and the degree of distortion and expansion / contraction of the object also increases. For this reason, the closer the object is, the greater the degree of difference in shape when viewed from the right eye and when viewed from the left eye. In some cases, it may not be visible as a display of one object, and it may be viewed as if there are different objects in the right eye and the left eye.

  Therefore, in this embodiment, by changing the direction of the virtual line of sight according to the distance between the virtual viewpoint and the object, a display that is easy to see even for an object at a short distance is realized. Specifically, the virtual visual line direction as a reference when generating the left and right eye field-of-view images is set as the “basic virtual visual line direction”, while the virtual visual line direction for viewing a short distance is set to “ As the “short distance virtual line-of-sight direction”, another virtual line-of-sight direction different from the basic virtual line-of-sight direction is set. The virtual viewpoint is a viewpoint corresponding to the position of the user's eye in the virtual space as described above, but may be the position of the left eye, the position of the right eye, or a position based on the distance between both eyes. Alternatively, the center of the left eye and the right eye may be used.

  FIG. 7 is an explanatory diagram illustrating a change in the line-of-sight direction of the field-of-view image according to the present embodiment. This figure shows an example in which the short distance virtual line-of-sight direction is set for the object H4 shown in FIG. The left-eye virtual line-of-sight direction KL1 and the right-eye virtual line-of-sight direction KR1 are basic virtual line-of-sight directions. The short-distance virtual line-of-sight direction is set to the left-eye virtual line-of-sight direction KL4 that is moved in the right direction (that is, the direction in which the object H4 is present) from the left-eye virtual line-of-sight direction KL1 for the left eye. It is set to the right eye virtual line-of-sight direction KR4 moved to the left (that is, the direction in which the object H4 is present) from the eye virtual line-of-sight direction KR1. For example, the difference in angle between the left-eye virtual line-of-sight direction KL1 that is the basic virtual line-of-sight direction and the actual line-of-sight direction KL3 is “n1”, whereas the left-eye virtual line-of-sight direction KL4 that is the short-range virtual line-of-sight direction The difference in angle with the actual line-of-sight direction KL3 is “n2” which is smaller than “n1” (n1> n2), and the difference is reduced. Here, only the angle difference between the left eye side is shown, but the right eye side similarly shows the angle difference between the right eye virtual line-of-sight direction KR1, which is the basic virtual line-of-sight direction, and the actual line-of-sight direction KR3. The difference in the angle difference between the right eye virtual visual line direction KR4, which is the short distance virtual visual line direction, and the actual visual line direction KR3 is smaller. Therefore, by changing from the basic virtual line-of-sight direction to the short-distance virtual line-of-sight direction, the difference between the actual eye line-of-sight direction and the virtual line-of-sight direction when viewing a short distance can be reduced.

  FIG. 8 is a diagram illustrating an example of a field-of-view image that is not subjected to the process of changing to the near-distance virtual line-of-sight direction. On the other hand, FIG. 9 is a diagram illustrating an example of a field-of-view image that has been subjected to the changing process in the short distance virtual line-of-sight direction. That is, in FIGS. 8 and 9, the positions of the virtual viewpoints of both eyes are the same, and only the virtual line-of-sight direction is different. In FIGS. 8 and 9, the left eye view image is shown on the left side and the right eye view image is shown on the right side, taking as an example the view image in which the character is displayed as an object placed at a short distance. Yes. For example, when attention is paid to the mouth of the character, the right half IL1 of the mouth in the unprocessed left-eye view image shown in FIG. 8 has little distortion and is nearly horizontal, but the right-eye view image. The right half IR1 of the mouth is compressed in the horizontal direction and stretched in the vertical direction and is distorted. When this field-of-view image is viewed with the HMD 10, the same mouth shape looks different in the left and right field-of-view images, making it difficult to recognize as the same mouth. On the other hand, in the view image in which the process of changing to the short distance virtual line-of-sight direction shown in FIG. 9 is performed, the shape of the right half IR2 of the character's mouth in the view image for the right eye is less distorted than in FIG. It has become. Thereby, the difference in shape between the right portion IL2 of the character's mouth in the left-eye view image and the right portion IR2 of the character's mouth in the right-eye view image is reduced as compared with FIG. It becomes easy to recognize as a mouth.

  As described above, in the present embodiment, by changing the virtual line-of-sight direction when generating the view field image based on the positional relationship between the virtual viewpoint and the object, the display of the virtual space using the binocular parallax can be further performed. You can make it easier to see. Note that it is desirable to change the virtual line-of-sight direction depending on whether or not the user is actually looking at an object at a short distance. Therefore, in this embodiment, it is determined whether or not to change the virtual line-of-sight direction based on the distance between the object in the virtual space and the virtual viewpoint.

  Also, the virtual line-of-sight direction changing process does not target all objects existing in the virtual space, but limits the target to a specific object (specific object). For example, the specific object is a preset object, such as a character (person, acquaintance, pet, etc.) or personal belongings. The specific object may be an object set in advance by a user operation. For example, the specific object may be an object locked on by a user operation, an object touched, or the like. By limiting in this way, it can suppress performing said change process unnecessarily. For example, it is natural for a foliage plant or the like as a background that does not need to be noticed to be subjected to the process of changing the virtual gaze direction, and VR sickness can be suppressed.

In the examples of FIGS. 6 and 7 , the specific object is on a straight line that is equidistant from the left-eye virtual viewpoint K (L) and the right-eye virtual viewpoint K (R). It does not have to be on the upper side, and may be in a position shifted to the left or right or up and down with respect to this straight line. When performing the above-described virtual visual line direction changing process, the left eye virtual viewpoint K (L) and the right eye virtual viewpoint K (R) need only face the direction of the specific object.

Hereinafter, the configuration of the HMD system according to the present embodiment will be described in detail.
[Configuration of HMD system]
FIG. 10 is a diagram illustrating an example of a hardware configuration of the HMD system according to the present embodiment. The illustrated HMD system 1 includes an HMD 10 and a game device 20 that causes the HMD 10 to display a game image.

  The HMD 10 includes a display unit 11, a sensor 12, a communication unit 13, and a CPU (Central Processing Unit) 14. The display unit 11 is a display that displays information such as images and text, and includes, for example, a liquid crystal display panel, an organic EL (ElectroLuminescence) display panel, and the like. For example, the display unit 11 uses a binocular parallax (a right-eye image and a left-eye image) as a view field image from a virtual viewpoint (a user's eye wearing an HMD) in the virtual space. Is displayed. The display unit 11 displays various objects arranged in the virtual space together with the view field image. The various objects include, for example, characters and items appearing in the game, effects produced in accordance with the progress of the game, selection menus and various icons that can be selected by user operations.

  The sensor 12 is a sensor that detects information related to the direction of the HMD 10. For example, the sensor 12 is a gyro sensor that detects the angle, angular velocity, angular acceleration, and the like of an object. The sensor 12 may be a sensor that detects a change in direction, or a sensor that detects the direction itself. For example, the sensor 12 is not limited to a gyro sensor, and may be an acceleration sensor, a tilt sensor, a geomagnetic sensor, or the like. The communication unit 13 communicates with the game apparatus 20 by wire or wireless. CPU14 functions as a control center which controls each part with which HMD10 is provided. For example, the CPU 14 acquires image data of a game image (for example, a view field image) transmitted from the game apparatus 20 via the communication unit 13 and causes the display unit 11 to display the image data. Further, the CPU 14 transmits information related to the direction of the HMD 10 to the game apparatus 20 based on the detection result of the sensor 12.

  Note that the hardware configurations of the HMD 10 described above are connected to each other via a bus so that they can communicate with each other.

  The game device 20 is a computer device that executes a game process of a game using a virtual space, and is a home game machine, a personal computer, an arcade game machine installed in a game center or the like, a mobile phone such as a smartphone or a feature phone. A personal digital assistant (PDA), a tablet PC, or the like can be applied. In the present embodiment, the game apparatus 20 will be described as a consumer game machine.

  The illustrated game device 20 includes an input unit 21, a speaker 22, a storage unit 23, a communication unit 24, and a CPU 25. The input unit 21 is an input device through which various instructions are input by a user operation. For example, the input unit 21 may be another input device such as a controller, a keyboard, a mouse, a touch pad, or a microphone in which various instructions are input by voice. The speaker 22 is an output device that outputs sound based on an audio signal. Instead of the speaker 22, an audio output terminal that outputs an audio signal to an external speaker, a headphone, an earphone, or the like may be used. The speaker 22 may be provided on the HMD 10 side.

  The storage unit 23 includes, for example, HDD (Hard Disk Drive), SSD (Solid State Drive), EEPROM (Electrically Erasable Programmable Read-Only Memory), ROM (Read-Only Memory, etc.). It stores virtual space data (image data) in which objects are arranged in the virtual space, game programs and data using the virtual space, and the like. The communication unit 24 communicates with the HMD 10 by wire or wireless.

  The CPU 25 functions as a control center that controls each unit included in the game apparatus 20. For example, the CPU 25 executes a game process by executing a game program stored in the storage unit 23 and functions as a control unit that controls display of a game image to be displayed on the HMD 10.

  Note that the respective hardware configurations included in the above-described game device 20 are connected to each other via a bus so that they can communicate with each other.

[Function configuration]
FIG. 11 is a block diagram illustrating an example of a functional configuration of the game apparatus 20 according to the present embodiment. The game apparatus 20 includes a control unit 250 as a functional configuration realized by the CPU 25 executing a program stored in the storage unit 23. The control unit 250 includes a detection unit 251, a view image generation unit 252, a change unit 253, and a display control unit 254, and is at least one of display control devices that control display of a game image (for example, a view image). It functions as a part. Here, the function of changing the virtual line-of-sight direction when the control unit 250 generates a view field image to be displayed on the HMD 10 will be described.

  The detection unit 251 detects information related to the direction of the HMD 10 based on the detection result of the sensor 12 acquired from the HMD 10 via the communication unit 24. Further, the detection unit 251 detects the visual field direction from the virtual viewpoint in the virtual space based on the information regarding the direction of the HMD 10. For example, the detection unit 251 detects the viewing direction or the change in the viewing direction based on the information indicating the direction of the HMD 10 or the change in the direction. Note that the detection unit 251 may detect information related to the change speed of the visual field direction based on information related to the change speed of the direction of the HMD 10.

  The field-of-view image generation unit 252 detects a field-of-view image (a field-of-view image for each of the left and right eyes) representing the field of view from the virtual viewpoint in the virtual space based on the virtual space data stored in the storage unit 23. Generate based on view direction. The visual field image generation unit 252 generates the visual field image based on the virtual visual line direction from the virtual viewpoint when generating the visual field image. The virtual line-of-sight direction is normally set to the basic virtual line-of-sight direction, and is changed to the short-distance virtual line-of-sight direction depending on the positional relationship between the virtual viewpoint and the specific object.

  Based on the positional relationship between the specific object included in the view field image and the virtual viewpoint among the specific objects arranged in the virtual space, the changing unit 253 causes the view field image generation unit 252 to view the view image (the view image of each of the left and right eyes). ) Is changed as a reference (left-eye virtual line-of-sight direction, right-eye virtual line-of-sight direction). For example, the changing unit 253 changes the virtual line-of-sight direction based on the distance between the specific object and the virtual viewpoint. Specifically, when the distance between the specific object and the virtual viewpoint is within a certain distance, the changing unit 253 approaches the basic virtual line-of-sight direction so that the difference between the direction toward the specific object and the virtual line-of-sight direction is reduced. The distance is changed to the virtual visual line direction (that is, the direction approaching the actual visual line direction to the specific object) (see FIG. 7).

  Here, the distance between the specific object and the virtual viewpoint is calculated based on, for example, the coordinate position of the specific object and the coordinate position of the virtual viewpoint in the virtual space. The coordinate position of the specific object is a specific position set for the specific object, and may be accompanied by movement. The coordinate position of the virtual viewpoint is based on the position of the user preset in the virtual space, and may be accompanied by movement as well.

  Moreover, said fixed distance is a value preset as a threshold value changed to a short distance virtual visual line direction, and can be set arbitrarily. For example, the fixed distance is set in consideration of the distance between the specific object and the virtual viewpoint so that the distance between the right eye and the left eye of the user greatly affects the virtual line-of-sight direction.

  On the other hand, when the virtual viewpoint and the specific object are separated from each other by a certain distance, the changing unit 253 does not execute the changing process in the short distance virtual line-of-sight direction. This is because if there is a certain distance from the virtual viewpoint to the specific object, the difference from the actual line-of-sight direction is small and the above-mentioned problems are unlikely to occur. This is because it is possible to prevent VR sickness from occurring by moving.

  Further, after changing to the short distance virtual line-of-sight direction, the changing unit 253 returns from the short-distance virtual line-of-sight direction to the basic virtual line-of-sight direction when the distance between the specific object and the virtual viewpoint is longer than a certain distance.

  The display control unit 254 causes the display unit 11 of the HMD 10 to display the field of view image data generated by the field of view image generation unit 252 by transmitting the data to the HMD 10 via the communication unit 24. In the following description, the display control unit 254 transmits the view field image data via the communication unit 24 to cause the HMD 10 to display the data on the display unit 11, and the display control unit 254 displays the display unit 11 (or HMD 10). It is also displayed. As a result, the field-of-view images generated by the field-of-view image generation unit 252 (the field images of the left and right eyes) are displayed on the display unit 11 of the HMD 10 as a stereoscopic image using binocular parallax.

[Operation of view image generation processing]
Next, with reference to FIG. 12, the operation of the visual field image generation process for changing the virtual visual line direction when the game apparatus 20 generates a visual field image will be described. FIG. 12 is a flowchart illustrating an example of a view field image generation process according to the present embodiment. First, the control unit 250 detects the viewing direction based on the detection result of the sensor 12 of the HMD 10 (step S100). Next, the control unit 250 determines whether there is a specific object in the field of view in the virtual space based on the detected field of view direction (step S102).

  When it is determined that there is a specific object in the field of view (YES), the control unit 250 detects the distance from the virtual viewpoint to the specific object. (Step S104).

  Next, the control unit 250 determines whether or not the distance from the detected virtual viewpoint to the specific object is within a certain distance (step S106). When it is determined that the distance from the virtual viewpoint to the specific object is within a certain distance (YES), the control unit 250 sets the virtual line-of-sight direction serving as a reference when generating the view field image to the short-distance virtual line-of-sight direction. . That is, the control unit 250 changes from the basic virtual line-of-sight direction to the short-distance virtual line-of-sight direction (step S108).

  On the other hand, if it is determined in step S102 that there is no specific object in the field of view (NO), and if it is determined in step S106 that the distance from the virtual viewpoint to the specific object is not within a certain distance (NO), The control unit 250 sets the virtual visual line direction serving as a reference when generating the visual field image as the basic virtual visual line direction. That is, the control unit 250 does not change the virtual visual line direction to the short distance virtual visual line direction (step S110).

  And the control part 250 produces | generates the visual field image of the visual field direction detected in step S100 on the basis of the short distance virtual visual line direction or basic virtual visual line direction set in step S108 or step S110 (step S112).

[Summary of First Embodiment]
As described above, the game apparatus 20 (an example of a display control apparatus) according to the present embodiment displays a view image representing a view from a virtual viewpoint in a virtual space as a stereoscopic image using binocular parallax. The display of HMD10 provided with the possible display part 11 is controlled. For example, the game apparatus 20 includes a detection unit 251, a view field image generation unit 252, a change unit 253, and a display control unit 254. The detection unit 251 detects the viewing direction from the virtual viewpoint based on the information regarding the direction of the display unit 11 (HDM 10). The visual field image generation unit 252 generates a visual field image based on the visual field direction detected by the detection unit 25 with reference to the virtual visual line direction from the virtual viewpoint. The changing unit 253 changes the virtual line-of-sight direction based on the positional relationship between the specific object included in the view field image and the virtual viewpoint among the specific objects arranged in the virtual space. The display control unit 254 causes the display unit 11 to display the view image generated by the view image generation unit 252.

  As a result, the game apparatus 20 changes the virtual line-of-sight direction when generating the view image based on the positional relationship between the virtual viewpoint and the specific object, so that the left-eye view image and the right-eye view image are used. Differences due to distortion and expansion / contraction of the image of the specific object can be suppressed, and display of the visual field image in the virtual space using binocular parallax can be made easier to see. Moreover, VR sickness can be suppressed thereby.

  For example, the positional relationship between the specific object and the virtual viewpoint is a positional relationship based on the distance between the specific object and the virtual viewpoint. As a result, the game apparatus 20 changes the virtual line-of-sight direction when generating the view image based on the distance between the virtual viewpoint and the specific object, so that the game device 20 specifies the view image for the left eye and the view image for the right eye. Differences due to distortion and expansion / contraction of the image of the object can be suppressed, and the display of the visual field image in the virtual space using binocular parallax can be made easier to see.

  As an example, the changing unit 253 changes the virtual line-of-sight direction when the distance between the specific object and the virtual viewpoint is within a certain distance. Thereby, when the specific object is at a short distance, the game apparatus 20 determines that the user is looking at the specific object, and changes to the short distance virtual line-of-sight direction according to the specific object. It is possible to make the field-of-view image easier to see even when is at a short distance.

  Specifically, the changing unit 253 changes the virtual line-of-sight direction so that the difference between the direction from the virtual viewpoint to the specific object and the virtual line-of-sight direction is reduced. Thereby, in order to reduce the difference between the visual line-of-sight direction of the actual user's eyes and the virtual line-of-sight direction when viewing the short distance, the game apparatus 20 distorts the image of the specific object determined to be viewed by the user and Expansion and contraction can be suppressed. Therefore, the game apparatus 20 can display the view image in the same way as the actual appearance of the specific object determined to be viewed by the user, thereby making it easier to see and suppressing VR sickness.

  The specific object is a preset object. Thereby, the game apparatus 20 sets a main object (for example, a character) as a specific object, thereby suppressing distortion and expansion / contraction of the image even when the main object exists at a short distance. Can be made easier to see, and VR sickness can be suppressed. In addition, the game device 20 can reduce VR sickness because it can reduce the unnecessary change of the virtual line-of-sight direction by limiting to a specific object from the plurality of objects.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
Since the basic configuration of the HMD system 1 according to the present embodiment is the same as the configurations illustrated in FIGS. 10 and 11, characteristic processing in the present embodiment will be described. In the first embodiment, the example in which the virtual line-of-sight direction change processing is performed based on the distance between the virtual viewpoint and the specific object has been described. However, in the present embodiment, based on the convergence angle corresponding to the virtual viewpoint and the specific object. An example of changing the virtual line-of-sight direction will be described.

  The convergence angle correlates with the distance to the specific object. For example, as shown in FIG. 6, the convergence angle r1 corresponding to the virtual viewpoint K and the object H3 includes the line-of-sight direction KL2 from the left eye virtual viewpoint K (L) to the object H3 and the right eye virtual viewpoint K (R). The angle formed by the line-of-sight direction KR2 toward the object H3. On the other hand, the convergence angle r2 corresponding to the virtual viewpoint K and the object H4 includes the line-of-sight direction KL3 from the left-eye virtual viewpoint K (L) to the object H4 and the line-of-sight direction from the right-eye virtual viewpoint K (R) to the object H4. This is the angle formed with KR3. The convergence angle r2 with respect to the object H4 at a shorter distance than the object H3 is larger than the convergence angle r1 with respect to the object H3 (convergence angle r1 <convergence angle r2). That is, the greater the convergence angle, the closer the distance to the specific object.

  Based on the positional relationship based on the convergence angle corresponding to the specific object included in the view image and the virtual viewpoint among the specific objects arranged in the virtual space, the changing unit 253 causes the view image generating unit 252 to change the view image (left and right). The virtual visual line direction (left eye virtual visual line direction, right eye virtual visual line direction), which is a reference when generating a visual field image of each eye), is changed. Specifically, the changing unit 253 determines the basic virtual line of sight so that the difference between the direction toward the specific object and the virtual line-of-sight direction is reduced when the convergence angle corresponding to the specific object and the virtual viewpoint is equal to or greater than a certain value. The direction is changed to the near distance virtual line-of-sight direction (that is, the direction approaching the actual line-of-sight direction to the specific object).

  In addition, said fixed value is a value preset as a threshold value changed to a short distance virtual visual line direction, and can be set arbitrarily. For example, this constant value is set in consideration of the convergence angle corresponding to the distance between the specific object and the virtual viewpoint so that the distance between the right eye and the left eye of the user greatly affects the virtual line-of-sight direction.

  On the other hand, when the convergence angle according to the virtual viewpoint and the specific object is smaller than a certain value, the changing unit 253 does not execute the changing process in the short distance virtual line-of-sight direction. In addition, after changing to the short distance virtual line-of-sight direction, the changing unit 253 changes from the short-distance virtual line-of-sight direction to the basic virtual line-of-sight direction when the convergence angle corresponding to the specific object and the virtual viewpoint becomes less than a certain value. return.

  FIG. 13 is a flowchart illustrating an example of a view field image generation process according to the present embodiment. In FIG. 13, the processes in steps S200, S202, S208, S210, and S212 are the same as the processes in steps S100, S102, S108, S110, and S112 in FIG. .

  In step S204, the control unit 250 detects a convergence angle according to the virtual viewpoint and the specific object. Next, the control unit 250 determines whether or not the detected convergence angle is greater than or equal to a certain value (step S206). When it is determined that the convergence angle is equal to or greater than a certain value (YES), the control unit 250 sets the virtual visual line direction serving as a reference when generating the visual field image as the short distance virtual visual line direction. That is, the control unit 250 changes from the basic virtual line-of-sight direction to the short-distance virtual line-of-sight direction (step S208).

  On the other hand, if it is determined in step S202 that there is no specific object in the field of view (NO), and if it is determined in step S206 that the convergence angle is less than a certain value (NO), the control unit 250 A virtual line-of-sight direction serving as a reference for generating an image is set as a basic virtual line-of-sight direction. That is, the control unit 250 does not change the virtual line-of-sight direction to the short-distance virtual line-of-sight direction (step S210).

  As described above, in the present embodiment, the positional relationship between the specific object and the virtual viewpoint is a positional relationship based on the convergence angle corresponding to the virtual viewpoint and the specific object. Thereby, the game apparatus 20 changes the virtual visual line direction when generating the visual field image based on the virtual viewpoint and the convergence angle corresponding to the specific object, so that the visual field image for the left eye and the visual field image for the right eye Thus, it is possible to suppress the difference due to distortion and expansion / contraction of the image of the specific object, and it is possible to make the display of the visual field image in the virtual space using binocular parallax easier to see.

  For example, the changing unit 253 changes the virtual line-of-sight direction when the convergence angle is equal to or greater than a certain value. Thereby, the game device 20 determines that the user is looking at the specific object when the convergence angle is equal to or greater than a certain value, that is, when the specific object is at a short distance, and the short distance according to the specific object. Since it changes to a virtual visual line direction, even if it is a case where a specific object exists in a short distance, a visual field image can be made easy to see.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
Since the basic configuration of the HMD system 1 according to the present embodiment is the same as the configurations illustrated in FIGS. 10 and 11, characteristic processing in the present embodiment will be described. In the present embodiment, an example will be described in which, in addition to the change in the virtual line-of-sight direction described in the first and second embodiments, the field of view is also changed.

  As described with reference to FIG. 5, the degree of distortion and expansion / contraction of an image increases as the view field image moves away from the virtual line-of-sight direction. Therefore, by narrowing the field of view, the image area that is distorted and stretched in the field of view image can be reduced. Narrowing the field of view is a process similar to zooming (enlarging) as a result. The range narrowed with respect to the area in the normal field of view can be arbitrarily set, and may be set in advance, or may be set based on the distance to the specific object, the size of the specific object, or the like. .

  In the present embodiment, the changing unit 253 changes the size of the visual field in the virtual space of the visual field image when changing the virtual visual line direction. For example, when changing the virtual line-of-sight direction to the short-distance line-of-sight direction, the changing unit 253 makes the field of view in the virtual space of the field-of-view image narrower than the normal field of view.

  Thereby, when the user looks at a short distance, in addition to changing to the short-distance line-of-sight direction, the game apparatus 20 can suppress the image area that is distorted and stretched by narrowing the field of view. The display of the visual field image in the virtual space using the eye parallax can be made easier to see.

  FIG. 14 is a flowchart illustrating an example of a view field image generation process according to the present embodiment. In FIG. 14, the processes in steps S300, S302, S304, S306, S308, S312, and S316 are the same as the processes in steps S100, S102, S104, S106, S108, S110, and S112 in FIG. Therefore, the description is omitted as appropriate.

  When it is determined in step S306 that the distance from the virtual viewpoint to the specific object is within a certain distance (YES), the control unit 250 sets the virtual visual line direction serving as a reference when generating the visual field image as the short distance virtual visual line direction. Set to. That is, the control unit 250 changes from the basic virtual line-of-sight direction to the short-distance virtual line-of-sight direction (step S308). Further, the control unit 250 changes the field of view from a normal standard value to a narrow range (step S310).

  On the other hand, if it is determined in step S302 that there is no specific object in the field of view (NO), and if it is determined in step S306 that the distance from the virtual viewpoint to the specific object is not within a certain distance (NO), The control unit 250 sets the virtual visual line direction serving as a reference when generating the visual field image as the basic virtual visual line direction. That is, the control unit 250 does not change the virtual visual line direction to the short distance virtual visual line direction (step S312). Further, the controller 250 sets the field of view to a normal standard value (step S314).

  Note that the visual field image generation process shown in FIG. 14 is an example of performing a virtual visual line direction changing process and a visual field changing process based on the distance between the virtual viewpoint and the specific object, but has been described in the second embodiment. In this way, the virtual line-of-sight direction change process and the view field change process may be performed based on the virtual viewpoint and the convergence angle corresponding to the specific object. That is, in this example, the view changing process is added to the view image generating process shown in FIG. 12, but the view changing process may be added to the view image generating process shown in FIG.

[Modification]
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above-described embodiment, and includes a design and the like within a scope not departing from the gist of the present invention. For example, the configurations described in the first to third embodiments can be arbitrarily combined.

  In the above-described embodiment, an example in which the specific object that is the target of the virtual line-of-sight direction change process is an object (for example, a character) set in advance has been described, but the present invention is not limited to this. For example, the specific object may be an object having a predetermined display form in the view field image. An object having a predetermined display mode is, for example, an object at a short distance, and an object whose display area ratio is equal to or higher than a predetermined ratio (for example, 50%) with respect to the area of the view field image. It is. That is, the specific object is not set in advance as described in the above embodiment, but the specific object is set according to the ratio of the display area of the short-distance object included in the view field image, and the virtual gaze direction changing process is performed. May be performed. For example, when the ratio of the display area of a short-distance object located within 30 cm from the virtual viewpoint in the view image becomes 50% or more with respect to the view image, the virtual line-of-sight direction changing process using the object as the specific object May be performed. As a result, the game device 20 determines that the user is looking at the object when there is a short-distance object that occupies a large proportion of the view field image as well as the specific object set in advance. Since the line-of-sight direction changing process is performed, distortion and expansion / contraction of the image of the specific object can be suppressed, and the viewing can be made easier.

  In the above embodiment, the configuration example in which the HMD 10 can be mounted on the user's head has been described. However, the HMD 10 is not limited to a configuration having a shape that can be completely mounted on the head. For example, the HMD 10 is a device that allows a user to grasp a visual field image and various objects in a virtual space while holding the positional relationship between the user's eyes and the display unit 11 in a predetermined relationship by grasping in front of the eyes. For example, it may be a shape like binoculars).

  The HMD 10 may be used as an HMD by attaching a terminal device such as a smartphone to the attachment. In this case, the display unit and the sensor of the terminal device function as the display unit 11 and the sensor 12 of the HMD 10, and the CPU of the terminal device functions as the CPU 25 of the game device 20. That is, the detection unit 251, the view image generation unit 252, the change unit 253, the display control unit 254, and the virtual space data of the storage unit 23 of the game device 20 included in the control unit 250 of the game device 20 are the above-described terminals. The device is equipped.

  Moreover, although the said embodiment demonstrated to the example the game using virtual space, it is not restricted to this. For example, any application that uses a virtual space is not limited to a game. Further, the virtual space in which the object is arranged may be based on the real space. For example, when the user moves in the real space, a view scene corresponding to the user's viewpoint in the real space may be displayed as a view image while being captured in real time. In this case, the specific object may be added to the view image based on the real space, or may be recognized from the real object in the real space.

  Moreover, although the said embodiment demonstrated the example which changes a visual field direction according to the direction of HMD10, it is not restricted to this, A visual field may be fixed. Even when the field of view is fixed, the virtual line-of-sight direction changing process may be performed based on the positional relationship between the virtual viewpoint and the specific object.

  Further, the program for realizing the function of the control unit 250 described above is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed as the control unit 250. You may perform the process of. Here, “loading and executing a program recorded on a recording medium into a computer system” includes installing the program in the computer system. The “computer system” here includes an OS and hardware such as peripheral devices. Further, the “computer system” may include a plurality of computer devices connected via a network including a communication line such as the Internet, WAN, LAN, and dedicated line. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. As described above, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM. The recording medium also includes a recording medium provided inside or outside that is accessible from the distribution server in order to distribute the program. The code of the program stored in the recording medium of the distribution server may be different from the code of the program that can be executed by the control unit 250. That is, the format stored in the distribution server is not limited as long as it can be downloaded from the distribution server and installed in a form that can be executed by the control unit 250. Note that the program may be divided into a plurality of parts and downloaded at different timings and then combined in the control unit 250, or the distribution server that distributes each of the divided programs may be different. Furthermore, a “computer-readable recording medium” holds a program for a certain period of time, such as a volatile memory (RAM) inside a computer system that becomes a server or client when the program is transmitted via a network. Including things. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  Also, some or all of the functions of the control unit 250 described above may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each function described above may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may be used.

[Appendix]
From the above description, the present invention is grasped as follows, for example. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses for convenience, but the present invention is not limited to the illustrated embodiment.

  (Additional remark 1) The display control apparatus (20) which concerns on 1 aspect of this invention is a display part which can display the visual field image showing the visual field from the virtual viewpoint in virtual space as a stereoscopic vision image using binocular parallax ( 11) a display control device for controlling the display of the head mounted display (10), the detection unit (251, S100, detecting the visual field direction from the virtual viewpoint based on the information on the direction of the display unit) (S200, S300), a view image generation unit (252, S112, S212, S316) that generates the view image based on the view direction detected by the detection unit with reference to the virtual view direction from the virtual viewpoint, and Based on a positional relationship between a specific object included in the view field image and a virtual viewpoint among specific objects arranged in the virtual space, the virtual line-of-sight direction is determined. Provided further change section (253, S108, S208, S308), the display control unit for displaying the visual image the field of view image generating unit has generated to the display section (254), the.

  According to the configuration of Supplementary Note 1, the display control apparatus changes the virtual line-of-sight direction when generating the visual field image based on the positional relationship between the virtual viewpoint and the specific object. Differences in the image of the specific object due to distortion and expansion / contraction can be suppressed, and display of the virtual space view image using binocular parallax can be made easier to see. Moreover, VR sickness can be suppressed thereby.

  (Additional remark 2) Moreover, 1 aspect of this invention is a display control apparatus of Additional remark 1, Comprising: The said positional relationship is a positional relationship based on the distance of the said specific object and the said virtual viewpoint.

  According to the configuration of Supplementary Note 2, the display control device changes the virtual visual line direction when generating the visual field image based on the distance between the virtual visual point and the specific object. Differences in the image of the specific object due to distortion and expansion / contraction with the view image can be suppressed, and display of the view image in the virtual space using binocular parallax can be made easier to see.

  (Additional remark 3) Moreover, 1 aspect of this invention is a display control apparatus of Additional remark 2, Comprising: The said change part changes the said virtual gaze direction, when the said distance is less than a fixed distance.

  According to the configuration of Supplementary Note 3, when the specific object is at a short distance, the display control device determines that the user is looking at the specific object, and changes the direction to the near virtual sight line direction according to the specific object. Therefore, it is possible to make it easier to see the view field image even when the specific object is at a short distance.

  (Additional remark 4) Moreover, 1 aspect of this invention is a display control apparatus of Additional remark 2 or Additional remark 3, Comprising: The said positional relationship is a positional relationship based on the convergence angle according to the said virtual viewpoint and the said specific object. It is.

  According to the configuration of Supplementary Note 4, the display control apparatus changes the virtual visual line direction when generating the visual field image based on the virtual viewpoint and the convergence angle corresponding to the specific object. Differences in the image of the specific object due to distortion and expansion / contraction can be suppressed with the visual field image for use, and the display of the visual field image in the virtual space using binocular parallax can be made easier to see.

  (Additional remark 5) Moreover, 1 aspect of this invention is a display control apparatus of Additional remark 4, Comprising: The said change part changes the said virtual gaze direction, when the said convergence angle is more than a fixed value.

  According to the configuration of Supplementary Note 5, when the convergence angle is equal to or greater than a certain value, that is, when the specific object is at a short distance, the display control device determines that the specific object is being viewed by the user, Therefore, the visual field image can be easily viewed even when the specific object is at a short distance.

  (Additional remark 6) Moreover, 1 aspect of this invention is a display control apparatus as described in any one of Additional remark 1 to Additional remark 5, Comprising: The said change part is the direction from the said virtual viewpoint to the said specific object, and said virtual The virtual line-of-sight direction is changed so that the difference from the line-of-sight direction is reduced.

  According to the configuration of Supplementary Note 6, the display control device reduces the difference between the visual line-of-sight direction of the actual user's eyes and the virtual line-of-sight direction when looking at a short distance, and thus the specific object determined to be viewed by the user Distortion and expansion / contraction of the image can be suppressed.

  (Additional remark 7) Moreover, 1 aspect of this invention is a display control apparatus as described in any one of Additional remark 1 to Additional remark 6, Comprising: The said specific object is a preset object.

  According to the configuration of Supplementary Note 7, the display control device sets a main object (for example, a character) as a specific object, so that even if the main object exists at a short distance, image distortion can occur. And since expansion and contraction can be suppressed, it can be made easier to see. In addition, the display control device can reduce VR sickness because it can reduce unnecessary change of the virtual line-of-sight direction by limiting to a specific object from among a plurality of objects.

  (Additional remark 8) Moreover, 1 aspect of this invention is a display control apparatus as described in any one of Additional remark 1 to Additional remark 7, Comprising: The said specific object is an object used as the predetermined | prescribed display aspect in the said visual field image. It is.

  According to the configuration of Supplementary Note 8, the display control device is not limited to the specific object set in advance, and when there is a short-distance object that occupies a large proportion of the view field image, the user looks at the object. Since the virtual line-of-sight direction changing process is performed by determining that the object is a specific object, distortion and expansion / contraction of the image of the specific object can be suppressed, which makes it easier to view.

  (Additional remark 9) Moreover, 1 aspect of this invention is a display control apparatus as described in any one of Additional remark 1 to Additional remark 8, Comprising: When the said change part changes the said virtual gaze direction, the said visual field image The range of the field of view in the virtual space is changed.

  According to the configuration of Supplementary Note 9, when the user looks at a short distance, in addition to changing to the short-distance line-of-sight direction, the display control apparatus reduces the image area that is distorted and stretched by narrowing the field of view. Therefore, the display of the visual field image in the virtual space using binocular parallax can be made easier to see.

  (Additional remark 10) Moreover, the program which concerns on 1 aspect of this invention is a program for functioning a computer as a display control apparatus as described in any one of Additional remark 1 to Additional remark 9.

  According to the configuration of Supplementary Note 10, since the program changes the virtual visual line direction when generating the visual field image based on the positional relationship between the virtual viewpoint and the specific object, the left eye visual field image and the right eye visual field are changed. Differences between the image and the image of the specific object due to distortion and expansion / contraction can be suppressed, and display of the visual field image in the virtual space using binocular parallax can be made easier to see. Moreover, VR sickness can be suppressed thereby.

  1 HMD system, 10 HMD, 11 display unit, 12 sensor, 13 communication unit, 14 CPU, 20 game device, 21 input unit, 22 speaker, 23 storage unit, 24 communication unit, 25 CPU, 250 control unit, 251 detection unit 252 View image generation unit, 253 change unit, 254 display control unit

Claims (6)

A display control device for controlling display of a head mounted display including a display unit capable of displaying a view field image representing a view field from a virtual viewpoint in a virtual space as a stereoscopic image using binocular parallax,
A detection unit for detecting a viewing direction from the virtual viewpoint based on information on the direction of the display unit;
A visual field image generation unit that generates the visual field image based on the visual field direction detected by the detection unit on the basis of the virtual visual line direction from the virtual viewpoint;
On the basis of the positional relationship based on the distance between the virtual viewpoint with a specific object included in the field image of the predetermined specific object placed in a virtual space, the distance between the virtual view point and the specific objects A change unit that changes the virtual line-of-sight direction when within a certain distance ; and
A display control unit for displaying the visual field image generated by the visual field image generation unit on a display unit;
A display control device. A display control device for controlling display of a head mounted display including a display unit capable of displaying a view field image representing a view field from a virtual viewpoint in a virtual space as a stereoscopic image using binocular parallax,
A detection unit for detecting a viewing direction from the virtual viewpoint based on information on the direction of the display unit;
A visual field image generation unit that generates the visual field image based on the visual field direction detected by the detection unit on the basis of the virtual visual line direction from the virtual viewpoint;
Wherein based on the virtual viewpoint and the positional relationship based on the convergence angle corresponding to the specific object contained in the field image of the predetermined specific object placed in a virtual space, wherein the specific object and the virtual viewpoint And a change unit that changes the virtual line-of-sight direction when the angle of convergence according to
A display control unit for displaying the visual field image generated by the visual field image generation unit on a display unit;
A display control device. The changing unit is
Changing the virtual line-of-sight direction so that a difference between the direction from the virtual viewpoint to the specific object and the virtual line-of-sight direction is reduced;
The display control apparatus according to claim 1 or 2 . The specific object is an object that has become a predetermined display mode in the view image.
The display control apparatus as described in any one of Claims 1-3 . The changing unit is
When changing the virtual line-of-sight direction, changing the width of the visual field in the virtual space of the visual field image;
The display control apparatus as described in any one of Claims 1-4 . The program for functioning a computer as a display control apparatus as described in any one of Claims 1-5 .