WO2020174554A1 - 映像表示装置及び映像表示方法 - Google Patents
映像表示装置及び映像表示方法 Download PDFInfo
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- WO2020174554A1 WO2020174554A1 PCT/JP2019/007184 JP2019007184W WO2020174554A1 WO 2020174554 A1 WO2020174554 A1 WO 2020174554A1 JP 2019007184 W JP2019007184 W JP 2019007184W WO 2020174554 A1 WO2020174554 A1 WO 2020174554A1
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/20—Instruments for performing navigational calculations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3626—Details of the output of route guidance instructions
- G01C21/3632—Guidance using simplified or iconic instructions, e.g. using arrows
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—Two-dimensional [2D] image generation
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/10—Map spot or coordinate position indicators; Map reading aids
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
Definitions
- the present invention relates to a portable video display device and video display method.
- HMD Head Mounted Display
- AR augmented reality
- a sensor attaching a sensor to the HMD, the information acquired by the sensor can be displayed on the display screen as an AR image.
- a terminal information acquisition unit that acquires position information and the like of its own terminal and a camera unit that generates a camera image of the surroundings are acquired in advance as a mobile terminal that depicts a user's action history.
- Depiction history calculation means for calculating the action history depiction information (avatar) to be displayed based on the action history and the imaging range of the camera means, and image composition for generating a composite image in which the behavior history depiction information is depicted in the camera image.
- a configuration including a unit and a display unit that displays a composite image is disclosed.
- Patent Document 1 when a user gives an instruction to record an action history, it is registered in the action history server. Then, the activity history of the desired user is acquired from the activity history server, and the avatar is displayed in a superimposed manner on the camera image according to the position information of the user. However, in Patent Document 1, it is assumed that the behavior history of any other user is acquired and displayed, and displaying the behavior history of the user himself is not particularly considered. Also, when displaying the action history, the avatars are displayed in the order in which the user moved to the position where the user has moved, so it is not suitable as a tool for guiding the return route from the current position to the user who has forgotten the return route. ..
- An object of the present invention is to provide a video display device that guides a return route along a route actually traveled by a user.
- a video display device of the present invention includes a sensor that detects a position and a direction of a user who carries the video display device, and a locus information acquisition that acquires information of a locus of movement of the user from a detection result of the sensor.
- Section a locus information of the user acquired by the locus information acquisition section, a storage section for storing information of an avatar which is a virtual image showing the user, a display section for displaying the locus of movement of the user by an avatar, and locus information acquisition
- a control unit that controls the display unit.
- control unit generates an avatar from the information of the avatar stored in the storage unit, obtains the current user's visual field area with the sensor, and based on the trajectory information of the user stored in the storage unit, An avatar is arranged on the user's movement locus according to the user's field of view and displayed on the display unit.
- the control unit temporally moves from the new trajectory information toward the old trajectory information when moving the avatar along the user's trajectory.
- FIG. 3 is an external view of the HMD according to the first embodiment.
- FIG. The block diagram which shows the internal structure of HMD.
- a differential trajectory information storage table that stores position information as differential values.
- a start point/end point position coordinate table that saves start/end position information.
- Still image data storage table for saving still images.
- the flowchart which shows the whole avatar display process. 9 is a flowchart showing a rescue process in FIG. 9A.
- FIG. 6 is a diagram illustrating an operation instruction by a user's finger.
- trajectory information storage table which preserve
- FIG. 8 is a schematic diagram of avatar display in the third embodiment.
- FIG. 14 is a diagram showing an appearance of a smartphone of Example 8.
- FIG. 16 is a diagram showing the configuration of a video display system in which a plurality of HMDs of Example 9 are connected.
- the schematic diagram which shows the example of a display of a plurality of avatars.
- HMD head mounted display
- FIG. 1 shows an external view of the HMD according to the first embodiment.
- the HMD 1 has a spectacles shape, and a display section 72 on which a user visually recognizes an image and an image pickup section 71 for photographing an outside scene are arranged on the front surface, and a temple section (vine) 91 stores various processing sections described later. ..
- a part of the processing unit in the temple unit 91 may be separated from the HMD main body, stored in another housing, and connected to the HMD main body by a cable.
- FIG. 2 is a block diagram showing the internal configuration of the HMD 1.
- the HMD 1 includes a main control unit 10, a system bus 30, a storage unit 40, a sensor unit 50, a communication processing unit 60, a video processing unit 70, an audio processing unit 80, and an operation input unit 90.
- the main control unit 10 is a microprocessor unit that controls the entire HMD 1 according to a predetermined operation program.
- the system bus 30 is a data communication path for transmitting and receiving various commands and data between the main control unit 10 and each component block in the HMD 1.
- the storage unit 40 stores various programs 41 for controlling the operation of the HMD 1 and various data 42 such as operation setting values, detection values from a sensor unit described later and objects including contents, and is used for various program operations. It has an area 43. At that time, the storage unit 40 can store the operation program downloaded from the network, various data created by the operation program, and the downloaded contents such as moving images, still images, and voices. Further, it is possible to store data such as moving images and still images taken by the image pickup unit 71. The storage unit 40 needs to hold the stored information even when the HMD 1 is not externally supplied with power.
- a semiconductor element memory such as a flash ROM or an SSD (Solid State Drive), a magnetic disk drive such as an HDD (Hard Disc Drive), or the like is used.
- the operation programs stored in the storage unit 40 can be updated and their functions can be expanded by a download process from each server device on the network.
- the sensor unit 50 includes a GPS (Global Positioning System) sensor 51, a geomagnetic sensor 52, a distance sensor 53, an acceleration sensor 54, a gyro sensor 55, an altitude sensor 56, and the like in order to detect various states of the HMD 1.
- the position, inclination, direction, movement, altitude, etc. of the HMD 1 are detected by these sensor groups.
- other sensors such as an illuminance sensor and a proximity sensor may be provided.
- the communication processing unit 60 includes a LAN (Local Area Network) communication unit 61 and a telephone network communication unit 62.
- the LAN communication unit 61 is connected to a network such as the Internet via an access point or the like, and transmits/receives data to/from each server device on the network.
- the connection with the access point or the like may be performed by a wireless connection such as Wi-Fi (registered trademark).
- the telephone network communication unit 62 performs telephone communication (call) and data transmission/reception by wireless communication with a base station of the mobile telephone communication network. Communication with base stations etc. is W-CDMA (Wideband Code Division Multiple Access) (registered trademark) system, GSM (registered trademark) (Global System for Mobile communications) system, LTE (Long Term Evolution) system, or other communication system. May be done by.
- the LAN communication unit 61 and the telephone network communication unit 62 each include an encoding circuit, a decoding circuit, an antenna and the like.
- the communication processing unit 60 may further include another communication unit such as a Bluetooth (registered trademark) communication unit or an infrared communication unit.
- the video processing unit 70 is composed of an image pickup unit 71 and a display unit 72.
- the image capturing unit 71 inputs image data of an external scene by converting light input from a lens into an electric signal by using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor. It is a camera unit.
- the display unit 72 is a display device of a transmissive display that uses, for example, a laser projector and a half mirror, and provides image data to the user of the HMD 1.
- the voice processing unit 80 includes a voice input/output unit 81, a voice recognition unit 82, and a voice decoding unit 83.
- a voice input of the voice input/output unit 81 is a microphone, which converts a user's voice or the like into voice data and inputs the voice data.
- the audio output of the audio input/output unit 81 is a speaker, and outputs audio information and the like required by the user.
- the voice recognition unit 82 analyzes the input voice information and extracts an instruction command or the like.
- the voice decoding unit 83 performs a decoding process of an encoded voice signal and a voice synthesis process.
- the operation input unit 90 is an instruction input unit that inputs an operation instruction for the HMD 1.
- the operation input unit 90 is composed of operation keys in which button switches and the like are arranged, but may further include other operation devices.
- the communication processing unit 60 may be used to operate the HMD 1 by using a separate mobile terminal device connected by wire communication or wireless communication.
- the voice recognition unit 82 of the voice processing unit 80 may be used to operate the HMD 1 by a voice command of an operation instruction.
- the configuration example of the HMD 1 shown in FIG. 2 includes a large number of configurations that are not essential to this embodiment, but the configuration without these does not impair the effects of this embodiment. On the contrary, a configuration not shown such as a digital broadcast receiving function and an electronic money settlement function may be further added.
- FIG. 3 is a diagram showing a connection configuration example with the external device by the communication processing unit 60.
- the LAN communication unit 61 of the HMD 1 connects to the network 5 such as the Internet via the wireless router 4 which is an access point.
- a server 6 is connected to the network 5 and transmits/receives data via the LAN communication unit 61 of the HMD 1.
- FIG. 4 is a diagram showing a configuration of functional blocks of the HMD 1.
- the main control unit 10 mainly executes the control processing of the entire HMD 1 using the various programs 41 and the various data 42 of the storage unit 40.
- the processing in the HMD1 is composed of a trajectory collection processing (S100) that collects and saves information about the movement trajectory of the user and an avatar display processing (S200) that displays an avatar that is a virtual image showing the user based on the saved trajectory information. (Represented by a broken line and a chain line, respectively).
- the various sensor information acquisition function 11 acquires information from various sensors of the sensor unit 50, and the trajectory information processing function 12 acquires information from the various sensors into trajectory information that is easily processed internally. Convert.
- the converted trajectory information is stored by the trajectory information storage function 13.
- the shooting is performed using the image pickup unit 71 of the video processing unit 70.
- the shooting process in that case is performed by the shooting data acquisition function 14, and the acquired shooting data is stored in the shooting data storage function 15 in association with the trajectory information.
- the avatar display processing (S200), the avatar information of the user stored in advance in the avatar information storage function 16 is read, and the avatar generated by the avatar generation function 17 is displayed by the avatar display function 18.
- the display position of the avatar is determined based on the trajectory information stored in the trajectory information storage function 13.
- the visual field calculation function 19 determines whether or not the display position of the avatar exists in the visual field of the HMD 1, and if it does not exist, the avatar is not displayed.
- the photographing data reproducing function 20 reproduces the photographing data stored in the photographing data storing function 15 according to the route locus.
- Storage functions such as the trajectory information storage function 13, the shooting data storage function 15, and the avatar information storage function 16 are stored in the external server 6 via the LAN communication unit 61 of the communication processing unit 60, as shown in FIG. You can also
- FIG. 5 is a schematic diagram showing an example of user trajectory collection.
- the user 2 wearing the HMD 1 is moving in the order of locus points 501, 502, 503, 504 (indicated by a ⁇ mark).
- the image pickup unit 71 photographs the subject 510. Therefore, the locus point 503 becomes a shooting point.
- the target to be photographed here is decided by the user's intention such as the place to stop by, the corner, the place where the route is wrong, the flora and fauna or buildings seen at that point, but when shooting the route trajectory later, the captured image Will be played.
- FIG. 6 is a flowchart showing the trajectory collection process (S100) of the HMD 1, and takes the trajectory schematic diagram of FIG. 5 as an example.
- This processing procedure is stored in various programs 41 of the storage unit 40.
- the instruction to start the trajectory collection is given by the voice of the user 2 in this embodiment. For example, when the voice command “Kiseki Kaishi” is uttered, the voice recognition unit 82 determines that it is an instruction to start the trajectory collection process.
- S111 Initialize the point number of the locus point.
- 0 is set as the initial value of the point number p
- the point number p 0 at the start of the trajectory collection process.
- S112 Start the timer. The timer counts using a clock built in the main control unit 10. The reason for using the timer is to collect the data of the trajectory points of the user at regular time intervals (unit time).
- the position of the HMD 1 is detected by the information from the sensor unit 50 (various sensor information acquisition function 11), converted into a format of saved data (trajectory information processing function 12), and saved in various data 42 of the storage unit 40. (Track information storage function 13).
- the GPS sensor 51 of the sensor unit 50 detects the position of the HMD 1 on the plane.
- Global position coordinates (longitude/latitude) of the HMD 1 can be detected by receiving radio waves from a plurality of GPS satellites.
- the altitude can be detected by the height sensor 56 of the sensor unit 50. For example, the atmospheric pressure is measured to calculate the altitude.
- the HMD 1's position information can also be acquired as global position information using Wi-Fi (registered trademark), Bluetooth (registered trademark), information transmitted from a mobile base station, or the like. Therefore, if the GPS information cannot be obtained, the position information of the HMD 1 is obtained from the information. Of course, other information may be combined with the GPS information.
- GPS information and the like the information for acquiring the global position information will be referred to as “GPS information and the like”.
- the user's trajectory information can be placed in the spatial coordinate system using the global position information.
- a unique spatial coordinate system with the locus acquisition start position as the origin is generated, and the position changes from the moving distance and moving direction of the user detected by the acceleration sensor 54, the gyro sensor 55, etc. of the sensor unit 50. May be calculated and placed in the local coordinate system. Then, by acquiring the global position information at a position where the global position information can be acquired with high accuracy and associating the global position information with the position information of the local coordinate system, for example, even when the trajectory is not continuously acquired or the trajectory information of another person is viewed. Applicable.
- S114 It is determined whether or not there is a shooting instruction by the user. If there is a shooting instruction, the process proceeds to S115, and if there is no shooting instruction, the process proceeds to S116.
- the shooting function of the image pickup unit 71 provides two shooting modes: still image shooting and moving image shooting. In order to distinguish these, for example, the voice command “Satei” is used for a still image shooting instruction, and the voice command “Satei Kaishi” is used for a moving image shooting instruction. For moving images, the voice command “Satsuaiowari” is used as an instruction to end shooting.
- S115 The subject in front of the HMD 1 is photographed by the image pickup unit 71 of the image processing unit 5 (photographing data acquisition function 14), and the photographed data is stored as various data 42 of the storage unit 40 (photographing data storage function 15).
- S116 It is determined whether or not the user has given an instruction to end the trajectory information acquisition process. For example, the voice command “kisekiowari” is used to determine that it is an instruction to end the trajectory collection process. If the end is instructed, the process proceeds to S117 to end the trajectory information acquisition process. If the end of the trajectory information acquisition process is not instructed, the process proceeds to S118.
- S118 It is determined whether a unit time has passed. Specifically, it is determined whether the timer has exceeded the unit time. When the unit time has elapsed, the process proceeds to S119, and when the unit time has not elapsed, the process returns to S114.
- S119 Add 1 to the point number p, return to S112, reset the timer, and restart.
- the trajectory points (position information) of the user can be collected at regular time intervals. For example, by setting the unit time of the timer to 1 second, the trajectory of the HMD 1 can be saved every 1 second. In addition, in parallel with this, a subject on the way can be photographed and saved according to a user's instruction.
- trajectory information data data table
- S100 trajectory collection processing
- FIG. 7A shows a trajectory information storage table 710 that stores position information as it is as measured values.
- the item is composed of a point number 711 indicating the order of each locus point and a position coordinate 712 corresponding to the locus point.
- position coordinates 712 planar position information (X, Y) from GPS information and the value of the altitude (Y) by the altitude sensor 56 are used.
- Point number 0 is the position coordinate (X 0 , Y 0 , Z 0 ) at the time when the trajectory collection process is started (S110), and point number 1 is the position coordinate (X 1 after the unit time (here, 1 second)).
- Y 1 , Z 1 is the position coordinate (X 1 after the unit time (here, 1 second)
- the point number k is the position coordinates (X k , Y k , Z k ) at the time when the user issues a shooting instruction (S114) after k seconds.
- the point number n is the position coordinate (X n , Y n , Z n ) at the time when the trajectory collection process ends (S117) n seconds after the start.
- the position coordinates 712 are fixed-length size data, so if the data are recorded in time series, the data of the point number 711 can be omitted. That is, the data of the target position coordinate of the point number p can be searched for by the multiple value p of the fixed length size.
- the relative value information (difference value information) of the acceleration sensor 54 and the gyro sensor 55 of the sensor unit 50 is temporarily stored. Then, when the position information (absolute value information) from the GPS information or the like can be acquired at any one of the locus points, the once stored relative value is corrected to the absolute value.
- FIG. 7B shows a differential trajectory information storage table 720 that stores position information as a differential value.
- the item includes a point number 721 and differential position coordinates 722 corresponding to the locus point.
- the difference position coordinate 722 the difference value between the position coordinate of the immediately previous trajectory point and the current position coordinate of the trajectory point is described. That is, the difference value ( ⁇ X, ⁇ Y) of the plane position coordinates is described by the distance in the longitude direction and the distance in the latitude direction between the two trajectory points.
- the difference value ( ⁇ Z) in the height direction is also described by the distance.
- the point number 1 is the difference position coordinates ( ⁇ X1, ⁇ Y1, ⁇ Z 1 ) one second after the start of the trajectory collection process
- the point number k is the difference position coordinates ( ⁇ Xk, ⁇ Yk, ⁇ Z k ) after k seconds
- the point number n indicates the differential position coordinates ( ⁇ Xn, ⁇ Yn, ⁇ Z n ) at the time when the trajectory collection process ends (n seconds after the start). The relationship with the value of the position coordinate 712 in FIG.
- FIG. 7C shows a start point/end point position coordinate table 730 that stores position information at the start/end of trajectory collection. This table is necessary when calculating the display position (absolute position) of the avatar using the differential trajectory information storage table 720 of FIG. 7B.
- the item includes a start point/end point distinction 731 that distinguishes a start point or an end point of trajectory collection, and a position coordinate 732 that indicates each position information by an absolute value.
- the start point is equal to the position coordinate (X 0 , Y 0 , Z 0 ) at the point number 0 in FIG. 7A (trajectory information storage table 710)
- the end point is the position coordinate (X n , Y) at the point number n. n , Z n ).
- the differential trajectory information storage table 720 of FIG. 7B can be converted into the trajectory information storage table 710 of FIG. 7A.
- the avatar can be displayed efficiently. The reason will be explained.
- the avatar is displayed by reversing the time from the end point (point number n) of the trajectory.
- the position coordinates of the end point for starting the display are not known, in order to calculate this, the position coordinates (X 0 , Y 0 , Z 0 ) of the start point in FIG.
- the position coordinates 722 must be added. If the position coordinates (X n , Y n , Z n ) of the end point are known, the avatar is first displayed at the position coordinates. The position where the avatar is displayed next can be easily calculated by subtracting the difference position coordinate ( ⁇ Xn, ⁇ Yn, ⁇ Z n ) at the point number n in FIG. 7C from the current position coordinate. The same process may be repeated thereafter.
- the locus information (the locus information storage table 710, the difference locus information storage table 720, the start point/end point position coordinate table 730) is not only stored in the various data 42 of the storage unit 40, but also as described in FIG. It is also possible to store it in the external server 6 via the network 5 for each trajectory point or when the table of trajectory information is completed. By storing the data in the server 6, the amount of data stored in the HMD 1 can be reduced.
- FIG. 8A shows a still image data storage table 810 that stores still images.
- the still image data storage table 810 includes a point number 811 indicating a locus point at the time of a shooting instruction, a shooting direction 812 indicating a shooting direction, a shooting data size 813, and shooting data 814.
- the HMD 1 shoots in the direction of ⁇ k at the locus point k (point number k), and the shooting data D k of the shooting data size M k is stored in the various data 42 of the storage unit 40 (S115). doing.
- the trajectory information storage table 710 and the still image data storage table 810 of this example are stored in association with each other.
- the still image captured in synchronization with the moving position of the HMD 1 per unit time here, 1 second. You can play back images.
- FIG. 8B shows a moving image data storage table 820 for storing moving images. Similar to the case of the still image in FIG. 8A, the moving image data storage table 820 includes a point number 821 indicating a locus point at the time of a shooting instruction, a shooting direction 822 at the start of shooting, a shooting data size 823, and shooting data 824. Composed. Furthermore, in the case of a moving image, the shooting time (start and end) 825 is described. This is to cope with the case where moving image shooting is performed over a plurality of locus points. If the moving image is played back every unit time (every 1 second), it can be synchronized with the time when the avatar is displayed.
- the HMD 1 starts shooting from the start time T ks in the direction of ⁇ k , and shoots the shooting data D k of the data size M k until the end time T ke.
- the storage unit 40 S115.
- the video data playback but it may be the entire display screen of the HMD, in this example, displayed in Shukushoko screen, to play from the moving image shooting start time T ks to movie shooting end time T ke.
- the information of these shooting data (still image data storage table 810, moving image data storage table 820) is also stored in the HMD 1 by being stored in the external server 6 via the network 5 as described in FIG.
- the amount of data to be used can be reduced.
- the avatar display process (S200) of the HMD 1 will be described.
- This processing procedure is stored in various programs 41 of the storage unit 40.
- the avatar is displayed by extracting the avatar information from the avatar information storage function 16 (avatar generation function 17) and displaying the avatar on the display unit 72 of the HMD 1 (avatar display function 18).
- the shape of the avatar is the same size as the user, and the height of the avatar is set by the user himself.
- the height of the height obtained by adding 10 cm to the distance from the ground (the height of the HMD 1 from the ground) can be set by the distance sensor 53 of the sensor unit 50.
- the display position of the avatar is displayed on the display unit 72 of the HMD so as to be superimposed on the background image according to the position information stored in the trajectory information storage table 710 and the like.
- the locus information and the shooting data to be used are stored in various data 42 in the HMD, the locus information and the shooting data are used, but the external server 6 is accessed via the LAN communication unit 61 of the communication processing unit 60. If it is stored, it is obtained from the server 6 and used.
- the avatar is displayed by reversing from the new trajectory information to the old trajectory information in time based on the trajectory point of the user.
- the display order is reversed in terms of time, so that the user can return from the end point (current point) to the start point (departure point) by the same route that has actually passed.
- FIG. 9A is a flowchart showing the entire avatar display process (S200).
- S210 Avatar display processing (S200) is started.
- the user utters the voice command “avatar kaishi” which means to start the avatar display, and determines that this is the avatar display start instruction.
- S211 Detect the current position and direction of the HMD 1 worn by the user.
- the detection method is performed by the GPS sensor 51, the geomagnetic sensor 52, the height sensor 56, and the like of the sensor unit 50, as in S113 in the trajectory collection process (S100).
- S212: The locus information storage table 710 (or the differential locus information storage table 720) is referred to, and the point number s of the position coordinate closest to the current position of the HMD 1 is searched. That is, if the current position is the end point of the trajectory collection, s n, but if the user subsequently moves from the end point, s ⁇ n.
- S213 As the initial value of the point number m to be displayed, the point number s closest to the current position is set. Thereby, the display can be performed from the locus point close to the current position of the user.
- the timer uses a clock built in the main control unit 10.
- the reason for using the timer is that the user's trajectories are collected at constant time intervals (unit time), and are displayed accordingly.
- the unit time used for displaying the avatar may be different from the unit time of the trajectory collection process and may be the time multiplied by an arbitrary coefficient. For example, if the unit time used for displaying the avatar is set to 1/2 time (0.5 seconds in this example), the displayed avatar can be moved at double speed. On the contrary, if the unit time used for displaying the avatar is set to double the time (2 seconds in this example), the displayed avatar can be moved at 1/2 speed (slow). Further, the avatar can be displayed as a moving image (animation) by sequentially interpolating (for example, every 1/24 seconds) the avatar between the trajectory points and displaying the avatar.
- S215 The position and direction of displaying the avatar are calculated.
- the locus information is stored in the locus information storage table 710
- the value (X m , Y m , Z m ) of the position coordinate 712 corresponding to the point number m is read out, and the avatar is placed at the planar position (X m , Y m ) and altitude (Z m ).
- X m X m+1- ⁇ X m+1
- Y m Y m+1- ⁇ Y m+1
- Z m Z m+1- ⁇ Z m+1
- the position coordinates (X n , Y n , Z n ) of the end point described in the start point/end point position coordinate table 730 and the value of the differential position coordinate 722 up to the point number s are set. Calculate using.
- the direction in which the avatar is facing is the direction connecting the previous locus point (m+1) and the current locus point (m).
- S217 The visibility calculation function 19 determines the display area of the HMD1, that is, the user's visual field from the current position and direction of the HMD1, and determines whether the placement position of the avatar calculated in S215 is within the display area. If it is determined that the avatar can be placed in the display area of the HMD 1, the process proceeds to S218, and if it is determined that the avatar cannot be placed, the relief process of S300 is performed.
- the rescue processing of S300 guidance processing such as changing the visual field direction of the user or moving the user to a position where the avatar can be seen is performed, and details will be described later with reference to FIG. 9B.
- the avatar can be arranged within the field of view of the user, and the user can move (track) without losing sight of the avatar or overtaking the avatar.
- S219 By referring to the still image data storage table 810 or the moving image data storage table 820, it is determined whether or not the currently displayed point number m is the shooting point k. When it is determined that the locus point is the shooting point, the process proceeds to S220. If it is determined that it is not the shooting point, the process proceeds to S222. S220: Notify that the current time is the shooting point. The shooting point notification method notifies the user by changing the color of the displayed avatar or blinking the avatar. S221: According to a user's instruction, the corresponding shooting data is read from the still image data storage table 810 or the moving image data storage table 820 and reproduced. The reproduction of the shooting data is executed by the voice command “Saisei”. The reproduction of the image data may be performed on the entire display screen of the HMD, but in this example, the image data is displayed on the reduced screen and the reproduction of the image data is ended after the display is continued for a certain time.
- S222 It is determined whether or not the user has given an instruction to end the avatar display processing. For example, the voice command “avatar owari” is used to determine that the command is an instruction to end the avatar display process. If the end of the avatar display processing is instructed, the process proceeds to S226, and the avatar display processing ends.
- S223 It is determined whether a unit time has passed. If it is determined that the unit time has elapsed, the process proceeds to S224. If it is determined that the unit time has not elapsed, the process returns to S222.
- S224 1 is subtracted from the point number m to obtain a new point number. As a result, it returns to the previous trajectory point that was traced back in time.
- FIG. 9B is a flowchart showing the rescue process (S300) in FIG. 9A. This process is performed when the determination in S217 is No, that is, when the avatar cannot be arranged in the display area. After the processing ends, the process returns to S211.
- S301 The visibility calculation function 20 determines whether or not the avatar can be arranged by changing the direction of the HMD 1. If it is possible, the process proceeds to S302, and if it is not possible, the process proceeds to S303.
- S302 This corresponds to the case where the HMD does not face the direction in which the avatar exists, and therefore the user is guided by voice or display to change the direction of the HMD.
- the voice decoding unit 83 of the voice processing unit 80 generates voice guides “Migi”, “Hidari”, and the like. At that time, the avatar may be displayed on the screen and uttered. After that, the process returns to S211.
- FIG. 10A is a diagram showing an example of the direction change guide display in S302.
- the avatar 3 appears on the display screen 400, and a message 401 indicating that the avatar exists is displayed on the right side.
- the new direction of the HMD is detected in S216 of FIG. 9A.
- the avatar is present in the new display area, and the avatar can be displayed in S218.
- S303 When it is impossible to place the avatar by changing the direction of the HMD1 in S301, it is considered that the current position is far from any of the points collected by the trajectory. Therefore, it is determined whether map information can be acquired in order to guide the user to the proximity point. For example, when the navigation application can be used, the process proceeds to S304. If the map information cannot be acquired, the process proceeds to S306.
- S304 Using the navigation application, the route analysis to the closest locus point s searched in S212 is performed.
- S305 Route information up to the locus point s (new locus point) is added to the locus information storage table 710. After that, the process returns to S211, and the display target position of the avatar including the added trajectory point is set. As a result, the avatar is placed in the display area of the HMD in S217, and the avatar can be displayed in S218.
- S306 If the map information cannot be acquired in S303, the direction of movement to the closest locus point s is presented to the user.
- the presentation method is voice or AR display. After that, the process returns to S211.
- the user can approach the closest locus point s by moving in the presented direction.
- the avatar is placed in the display area in S217, and the avatar can be displayed in S218.
- FIG. 10B is a diagram showing an example of the moving direction guide display in S306.
- the AR display 402 informs the display screen 400 of the direction in which the user should move.
- the AR display 402 only needs to know the direction in which to proceed, and uses characters, icons (arrows), and the like.
- the rescue process of S300 can be performed to guide the user to the position or direction in which the avatar can be seen. This allows the user to move (track) without losing sight of the avatar.
- FIGS. 11A and 11B are diagrams showing display examples of avatars. This example corresponds to the schematic diagram at the time of trajectory collection shown in FIG.
- each locus point of the HMD collected from the loci is temporally reversed to display the avatar 3. That is, the display position of the avatar 3 is moved in the direction of the arrow in the order of the locus points 504, 503, 502, 501 (displayed by ⁇ marks) and displayed.
- the locus point 503 is the shooting point k, and is therefore indicated by a double circle to distinguish it from other positions.
- the body orientation when moving the avatar 3 is set to a posture (backward) opposite to the traveling direction of the avatar 3. , Showing how to return to the original route.
- the display screen 400 of FIG. 11B shows the display state of the avatar 3 at the trajectory point 503. Since the locus point 503 is a corner, the direction of the avatar 3 is changed. Further, since the locus point 503 is a photographing point, the color of the avatar 3 is changed and displayed. Here, when the user gives an instruction to reproduce the photographing data, an image 510' of the subject 510 photographed at the photographing point is displayed.
- the trajectory point ( ⁇ mark) and the traveling direction (arrow) are displayed on the display screen 400, but these may be hidden.
- the locus points of the avatar are displayed every unit time (1 second), but the present invention is not limited to this, and it is also possible to display at other time intervals. For example, if the image is interpolated and displayed every 1/24 second, the avatar is displayed as a smooth moving image such as a movie.
- FIG. 12 is a table showing an example of voice commands used for operating the HMD.
- the items of the voice command table 600 are composed of a command classification 601, a voice command 602 issued by the user, a command name 603, and a processing content 604.
- the voice command classification 601 is divided into trajectory collection related and avatar display related.
- the trajectory collection-related voice commands 602 include “kisekikaishi”, “kisekistart” for starting the trajectory collection process, “kisekiowari”, “kisekiend” for ending the trajectory collection process, “satsuei”, “kilok” for shooting still images, There are “Satsuei Kaishi” and “Kirok Start” to start video recording, and “Satsuei Owari” and “Kirok End” to end video recording.
- Avatar display-related voice commands 602 include “avatar kaishi” and “avatar start” to start avatar display processing, “avatar owari” and “avatar end” to end avatar display processing, and “saisei” to play still images or videos. There is “Saturday data” etc.
- the voice commands listed here are merely examples, and it goes without saying that they can be appropriately set according to the preference of the user.
- the HMD 1 can make a voice response corresponding to the voice command issued by the user by using the voice synthesizing function of the voice decoding unit 83 of the voice processing unit 80.
- the voice synthesizing function of the voice decoding unit 83 of the voice processing unit 80 As a result, for example, it is possible to respond with the same voice (aum return) as the voice command of the user, or to confirm the voice command of the user.
- the user's response is "high”
- a confirmation voice "XX Wokkokkomusu” is answered, and if the user's response is "yes", a confirmation voice "is displayed”.
- the voice commands “high” and “yes” used by the user in the reply are not shown in FIG.
- the voice synthesizing function of the voice decoding unit 83 can be used to generate a synthetic voice such as a voice "Migi” for urging a rightward rotation and a voice "Hidari” for urging a leftward rotation. This can be utilized in the step S306 of FIG. 9B.
- Operation instructions for HMD1 can be realized by methods other than voice commands.
- the operation menu is displayed on the display screen of the HMD 1 and the user selects with a gesture (movement of hand/finger).
- the user's finger can be photographed by the imaging unit 71 of the image processing unit 70, and the movement of the finger can be recognized from the captured image and used for the operation.
- FIG. 13 is a diagram for explaining an operation instruction with a user's finger.
- a “photograph” menu 411 and a “video” menu 412 are displayed as selection menus.
- the menu display is preferably semi-transparent, but not limited to this.
- the imaging unit 71 detects the finger image 415 that gradually increases toward the display screen 410. Further, it recognizes that the finger image 415 is heading to the “video” menu 412, and determines that “video” is selected and designated. As other operations, only the "start” menu is displayed at the start of trajectory collection or avatar display, and the "end” menu is displayed at the end. Then, the approach of the user's finger image 415 by the imaging unit 71 is detected, and it is determined that the start or end is instructed. In addition to this, a method may be used in which a touch sensor is provided in the operation input unit 90 of the HMD 1 to detect that the user's hand or finger touches the HMD 1.
- the first embodiment it is possible to easily guide the return route to the user who has forgotten the place to stop or the return route during the movement.
- the position coordinates of the HMD are stored in three dimensions (X, Y, Z), but in the second embodiment, a case of storing the position coordinates in two dimensions (X, Y) will be described.
- the basic configuration of the HMD in the second embodiment is similar to that of the first embodiment, and the differences from the first embodiment will be described.
- the trajectory collection process is performed by the same flowchart (S100) as in the first embodiment (FIG. 6). Then, the collected data is stored in the tables shown in FIGS. 14A and 14B.
- FIG. 14A shows a two-dimensional trajectory information storage table 740, in which position information is stored as a difference value.
- a point number 741 indicating the number of each locus point
- a differential position coordinate 742 indicating the plane position of the locus point are configured.
- the difference position coordinate 742 is not an absolute value of the position coordinate but a difference value (change amount) between adjacent locus points to reduce the amount of data to be stored.
- the point number 1 is the difference position coordinate ( ⁇ X1, ⁇ Y 1 ) 1 second after the start of the trajectory collection process, and the point number k is k seconds.
- differential position coordinates after ( ⁇ Xk, ⁇ Y k), point number n indicates differential position coordinates (.DELTA.Xn, [Delta] Y n) of the time the trajectory collection process has been completed (after n seconds from the start), respectively.
- the method of obtaining the differential position coordinates is the same as that in the first embodiment (FIG. 7B).
- FIG. 14B shows a two-dimensional start point/end point position coordinate table 750 that stores position information at the start/end of trajectory collection. This table is needed when the display position (absolute position) of the avatar is calculated using the two-dimensional differential trajectory information storage table 740 of FIG. 14A.
- the item is composed of a start point/end point distinction 751 for discriminating between the start point and the end point of trajectory collection, and a position coordinate 752 indicating respective position information by an absolute value, which is the same as in FIG. 7C.
- a position coordinate 752 indicating respective position information by an absolute value, which is the same as in FIG. 7C.
- the position coordinate 752 only the position coordinate (X 0 , Y 0 , Z 0 ) of the start point stores the position coordinate (Z 0 ) in the height direction. This is to cope with the case where the altitude change amount exceeds a predetermined value (threshold value) during acquisition of the trajectory information.
- the change ( ⁇ X, ⁇ Y) in the planar position coordinates of the HMD are linear, and the changes in the altitude of the HMD ( ⁇ Z) are also linear.
- the change ( ⁇ X, ⁇ Y) in the planar position coordinates of the HMD is the step width, and the change in the HMD altitude ( ⁇ Z) is the step difference.
- the trajectory collection processing by the two-dimensional trajectory information storage tables 740 and 750 ends as trajectory A. Then, the process newly moves to the trajectory collecting process by the three-dimensional trajectory information storage tables 710 to 730 of the first embodiment, and the trajectory B is set. After that, when the amount of change in altitude falls within the threshold value, the trajectory collection processing by the two-dimensional trajectory information storage tables 740 and 750 is restarted to obtain the trajectory C. With this method, the amount of data to be stored can be reduced as much as possible.
- the two-dimensional trajectory information storage tables 740 and 750 of the second embodiment can be converted into the three-dimensional trajectory information storage tables 710 to 730 of the first embodiment.
- the GPS sensor 51 of the sensor unit 50 is relatively easy to acquire GPS information (positional information) outdoors, but when it is difficult to acquire GPS information such as in an underground mall or indoors. There is.
- the information from the acceleration sensor 54 of the sensor unit 50, the gyro sensor 55, or the like is used for supplementation.
- Example 1 when the avatar was displayed, the direction of the avatar was reversed from the traveling direction, and the avatar was moved backward.
- the avatar is displayed so as to face the traveling direction.
- FIG. 15 is a schematic diagram of avatar display in the third embodiment.
- the avatar 3 On the display screen 400, the avatar 3 is displayed in a posture (forward) facing the traveling direction. That is, the orientation of the avatar 3 is set in the vector direction from the current locus point 503 to the next locus point 502.
- FIG. 11B the uncomfortable feeling of the user (that the advancing direction of the avatar does not match the direction of the avatar) caused by the orientation of the avatar as shown in the first embodiment (FIG. 11B).
- FIG. 16 is a schematic diagram of avatar display in the fourth embodiment.
- the avatar 3 is moving backward.
- the avatar 3 controls so that the part hidden by the building 521 is not displayed.
- Whether or not the avatar 3 is hidden can be determined by comparing the distances to the buildings 521 and 522 and the avatar 3, and the distance to the buildings 521 and 522 can be measured by the distance sensor 53.
- the hidden avatar may be displayed semi-transparently so that it can be tracked.
- the images of the buildings 521 and 522 can also be displayed using, for example, Street View (Google, Inc.), which is an Internet service that provides panoramic photographs of landscapes along the road. Further, depending on the position and direction of the HMD 1, the name of a building attached to the building or the like can be used.
- Street View Google, Inc.
- the name of a building attached to the building or the like can be used.
- the photographing instruction is not automatically given to the user but is automatically photographed.
- the image capturing unit 71 of the HMD starts capturing from a start point and always loops and temporarily captures an image of a certain time (for example, twice the unit time between the trajectory points used in the trajectory collecting process) from the present time. save.
- the image automatically captured is a moving image or a still image that is traced back a certain time (for example, 2 seconds) from the current time.
- the function can be sufficiently exerted by temporarily storing one or two still images between the locus point and the next locus point. Then, an image taken at a peculiar place on the moving route, for example, a place where the moving direction is changed is left.
- the specific operation of automatic shooting will be explained using the trajectory collection schematic diagram of FIG.
- the image from the locus point 502 to the locus point 504 (twice the length of the unit time) is temporarily stored.
- the movement direction (movement vector between points) changes by 90 degrees. Therefore, the image captured from the locus point 502 to the locus point 503 is automatically saved as the image immediately before the direction of the movement vector changes greatly.
- the image data of the locus point 503 to be stored may be a moving image (moving image frame captured up to the locus point 503) or a still image (shooting data of the locus point 503).
- the imaging method of the fifth embodiment when the user changes the traveling direction, the image of the traveling direction immediately before changing the traveling direction is stored, so that an image that is most suitable for recalling the user can be displayed. it can.
- information such as the posture of the user is also collected in the trajectory collection processing and reflected when the avatar is displayed.
- the distance sensor 53 of the sensor unit 50 detects the distance from the ground or floor surface to the HMD 1 (that is, the height of the user's head), and collects it for each trajectory point. By comparing this detected value with the height (known) of the user, the posture of the user wearing the HMD 1 (standing, sitting, crouching, sleeping, etc.) can be estimated. The standing avatar and the sitting avatar are displayed by reflecting this posture information on the displayed avatar.
- the orientation of the face of the user wearing the HMD 1 can be known by the geomagnetic sensor 52 of the sensor unit 50.
- the face orientation information is reflected in the displayed avatar, and the face orientation of the avatar is changed for each trajectory point.
- the orientation of the body of the avatar may be estimated and changed based on the orientation of the face, but may be adjusted according to the vector information between the trajectory points (the traveling direction). With these displays, it is possible to display a more realistic avatar.
- FIG. 17A shows an example of the trajectory information storage table 710′ in the seventh embodiment.
- the passing time 713 when each trajectory point is passed is additionally described.
- FIG. 17B is a diagram showing a display example of an avatar.
- the passing time 420 is displayed together with the display of the avatar 3.
- the passing time 713 corresponding to the point number 711 currently displaying the avatar in the trajectory information storage table 710' of FIG. 17A may be referred to.
- the seventh embodiment when the user has passed the currently displayed locus point is displayed, which is effective information for recalling the user's memory.
- Example 8 describes a case where a smartphone is used instead of the HMD as a portable video display device.
- the smartphone has almost the same hardware configuration and software configuration as the HMD, and can realize equivalent functions.
- FIG. 18 is a diagram showing an appearance of the smartphone 9, where (a) is a front side for displaying an image and (b) is a back side having a camera. As shown in (b), a camera 901 is provided on the back side to photograph an outside scene.
- the smartphone 9 has a sensor for detecting the three-dimensional position and the direction of the camera 901, and can collect the trajectory information as in the case of the HMD.
- the front side has a display screen 902 with a built-in touch panel, and displays an image taken with the camera 901 facing the outside scene. Then, on the display screen 902, the avatar 3 can be superimposed and displayed in accordance with the image of the displayed outside scene, based on the collected trajectory information, as in the first embodiment (FIG. 11A).
- a smartphone is taken as an example of the portable video display device, but the operation of this embodiment can be realized if there is an equivalent or approximate hardware configuration or software configuration.
- it can be applied to a notebook PC, a tablet PC, or the like.
- FIG. 19 is a diagram showing a configuration of a video display system in which a plurality of HMDs are connected. Here, the case of two users 2a and 2b is shown, and the HMD 1a and the HMD 1b are worn, respectively. The same applies to cases other than two.
- the HMD 1a worn by the user 2a is connected to the external server 6 via the wireless router 4a and the network 5.
- the HMD 1b worn by the user 2b is connected to the same server 6 via the wireless router 4b and the network 5.
- the wireless routers 4a and 4b can be shared.
- each HMD 1a, 1b collects the trajectory of each user 2a, 2b. Then, the trajectory information of the user 2a who wears the HMD 1a and the trajectory information of the user 2b who wears the HMD 1b are stored in the common server 6. After that, the locus information of the two persons is read from the server 6 and displayed on the respective HMDs 1a and 1b as two avatars which are virtual images of the two persons. As a result, the loci can be referred to each other by the avatar.
- FIG. 20 is a schematic diagram showing a display example of a plurality of avatars.
- the avatar 3b of the user 2b wearing the HMD 1b is displayed on the display screen 400a of the HMD 1a.
- the loci 520a and 520b in which the two persons have acted are displayed by respective locus points (marked by ⁇ and ⁇ ), and the positional relationship between the two can be displayed in reverse time.
- the two people merged at the intersection of the locus points 521. The same is displayed on the display screen 400b of the HMD 1b.
- the loci of a plurality of users can be mutually confirmed. As a result, if another user is out of the field of view during trajectory collection, the position of the other user can be immediately known.
- the short-distance wireless communication such as Bluetooth (registered trademark) is used to communicate between the portable information terminals to use the server 6 via the wireless router 4 and the network 5.
- Bluetooth registered trademark
- the functions and the like of the present invention described above may be realized in hardware by designing a part or all of them with, for example, an integrated circuit.
- the microprocessor unit or the like may be realized by software by interpreting and executing a program for realizing each function or the like.
- Hardware and software may be used together.
- the software may be stored in advance in various programs 41 of the HMD 1 at the time of product shipment. It may be obtained from various server devices on the Internet after the product is shipped. Further, the software provided by a memory card, an optical disc, or the like may be acquired.
- control lines and information lines shown in the figure are those that are considered necessary for explanation, and not all control lines and information lines on the product are necessarily shown. In practice, it may be considered that almost all configurations are connected to each other.
- HMD video display device
- 2 User
- 3 Avatar
- 4 Wireless router
- 5 Network
- 6 Server
- 9 Smartphone
- Smartphone video display device 10
- Main control part 40
- Communication processing unit 70
- Image processing unit 71
- Imaging unit 72
- Display unit 80
- Audio processing Section 90... Operation input section.
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Abstract
Description
HMD1全体の制御処理は、主に、主制御部10が記憶部40の各種プログラム41及び各種データ42を用いて実行する。HMD1における処理は、ユーザの移動軌跡の情報を収集し保存する軌跡収集処理(S100)と、保存した軌跡情報に基づいてユーザを示す仮想映像であるアバターを表示するアバター表示処理(S200)で構成される(それぞれ破線と鎖線で示す)。
S110:ユーザ2の指示で軌跡収集処理(S100)を開始する。軌跡収集開始の指示は、本実施例ではユーザ2の音声で行う。例えば、音声コマンド「キセキカイシ」を発声すると、音声認識部82は軌跡収集処理の開始指示であると判断する。
S112:タイマーを起動する。タイマーは、主制御部10に内蔵されているクロックを用いて計時する。タイマーを使用するのは、ユーザの軌跡ポイントのデータを一定時間(単位時間)の間隔で収集するためである。
S115:HMD1の前方にある被写体を映像処理部5の撮像部71で撮影し(撮影データ取得機能14)、撮影データを記憶部40の各種データ42として保存する(撮影データ保存機能15)。
S118:単位時間を経過したかどうかを判断する。具体的にはタイマーが単位時間を越えたかどうかで判断する。単位時間を経過した場合はS119へ進み、単位時間を経過していない場合はS114へ戻る。
S119:ポイント番号pに1を加算し、S112へ戻りタイマーをリセットして再度起動する。
ΔXp=Xp-Xp-1,ΔYp=Yp-Yp-1,ΔZp=Zp-Zp-1
となる。
図8Aは、静止画を保存する静止画データ格納テーブル810を示す。静止画データ格納テーブル810は、撮影指示があった時点の軌跡ポイントを示すポイント番号811、撮影方向を示す撮影方向812、撮影データサイズ813、撮影データ814から構成される。この例では、軌跡ポイントk(ポイント番号k)の地点で、HMD1がΘkの方向で撮影し、撮影データサイズMkの撮影データDkを、記憶部40の各種データ42に保存(S115)している。
S210:アバター表示処理(S200)を開始する。本例では、ユーザがアバター表示開始を意味する音声コマンド「アバターカイシ」を発声することにより、アバター表示開始指示と判断する。
S212:軌跡情報保存テーブル710(または差分軌跡情報保存テーブル720)を参照し、現時点のHMD1の位置に最も近い位置座標のポイント番号sを検索する。すなわち、現在位置が軌跡収集の終点であればs=nとなるが、もしユーザがその後終点から移動した場合にはs≠nとなることもある。
S213:表示するポイント番号mの初期値として、現在位置に最も近いポイント番号sを設定する。これにより、ユーザの現在位置に近い軌跡ポイントから表示を行うことができる。
軌跡情報が差分軌跡情報保存テーブル720に保存されている場合は、ポイント番号(m+1)における差分位置座標722の値(差分値)を読み出して、前回の表示位置(ポイント番号=m+1)から減算する。すなわち、
Xm=Xm+1-ΔXm+1,Ym=Ym+1-ΔYm+1,Zm=Zm+1-ΔZm+1
となる。ただし、初回(m=s)については、始点・終点位置座標テーブル730に記述された終点の位置座標(Xn,Yn,Zn)、およびポイント番号sまでの差分位置座標722の値を用いて算出する。
アバターの向いている方向は、便宜的に、前回の軌跡ポイント(m+1)と今回の軌跡ポイント(m)を結ぶ方向とする。
S217:視界算出機能19により、現時点のHMD1の位置と方向から、HMD1の表示領域、すなわちユーザの視野領域を求め、S215で算出したアバターの配置位置が表示領域内かどうかを判断する。HMD1の表示領域内にアバターを配置できると判断した場合はS218へ進み、アバターを配置できないと判断した場合はS300の救済処理を行う。S300の救済処理では、ユーザに対し視野方向を変えさせるとかユーザをアバターの見える位置まで移動させるなどの誘導処理を行うもので、詳細は図9Bで後述する。このS217の判断処理とS300の救済処理により、ユーザの視界内にアバターを配置させることができ、ユーザはアバターを見失うことなく、あるいはアバターを追い越すことなく移動(追跡)することができる。
S220:現時点が撮影ポイントであることを報知する。撮影ポイントの報知方法は、表示中のアバターの色を変えたり、アバターをブリンク(点滅)させたりすることでユーザに知らせる。
S221:ユーザの指示により、静止画データ格納テーブル810または動画データ格納テーブル820から該当する撮影データを読み出して再生する。撮影データの再生は、音声コマンド「サイセイ」により実行する。撮影データの再生は、HMDの表示画面全体でも良いが、本例では、縮小子画面で表示し、一定の時間表示を継続した後に撮影データの再生を終了する。
S223:単位時間を経過したかどうかを判断する。単位時間を経過したと判断した場合は、S224へ進む。単位時間を経過しないと判断した場合は、S222へ戻る。
S224:ポイント番号mから1を減算して新しいポイント番号とする。これにより、時間的に遡った1つ前の軌跡ポイントに戻る。
S302:HMDがアバターの存在方向に向いていない場合に該当するので、ユーザにHMDの方向を転換するように音声又は表示でガイドする。例えば、音声処理部80の音声復号部83により音声ガイド「ミギ」、「ヒダリ」等を発生する。その際、アバターを画面に出して発声させても良い。その後、S211へ戻る。
S305:軌跡ポイントsまでのルート情報(新たな軌跡ポイント)を軌跡情報保存テーブル710に追加する。その後S211へ戻り、追加した軌跡ポイントを含めてアバターの表示対象位置となる。その結果、S217ではHMDの表示領域内にアバターが配置されることになり、S218でアバターを表示することができる。
図11Aの表示画面400では、軌跡収集したHMDの各軌跡ポイントを時間的に逆行させてアバター3を表示する。すなわち、アバター3の表示位置を軌跡ポイント504、503、502、501(●印で表示)の順に、矢印方向に移動させて表示する。この中で軌跡ポイント503は撮影ポイントkであるので、他の位置と識別するため◎印で表示している。また、軌跡収集処理の過程でユーザ2(HMD)が向いていた方向を再現するため、アバター3を移動させるときの体の向きを、アバター3の進行方向とは逆向き(後ろ向き)の姿勢として、元来た経路を戻る様子を示している。
また、アバターの軌跡ポイントを単位時間(1秒)毎に表示しているが、これに限らず、他の時間間隔で表示することもできる。例えば、1/24秒毎に補間して表示すると、アバターが映画のような滑らかな動画で表示される。
図12は、HMDの操作に使用する音声コマンドの例を示すテーブルである。音声コマンドテーブル600の項目は、コマンドの分類601と、ユーザの発する音声コマンド602と、コマンドの名称603と、処理内容604から構成されている。
さらに、音声復号部83の音声合成機能を用いて、右方向への回転を促す音声「ミギ」や、左方向への回転を促す音声「ヒダリ」などの合成音声を発生させることができる。これは、図9BのS306の工程で利用することができる。
これ以外に、HMD1の操作入力部90にタッチセンサを設け、HMD1にユーザの手や指が触れたことを検出する方式でも良い。
坂道を上る(下る)場合は、HMDの平面的位置座標の変化(ΔX,ΔY)が直線的であり、HMDの高度の変化(ΔZ)も直線的になる。階段を上る(下る)場合は、HMDの平面的位置座標の変化(ΔX,ΔY)が階段幅分であり、HMDの高度の変化(ΔZ)も階段の段差分になる。
この手法により、保存するデータ量を極力少なくすることができる。勿論、実施例2の2次元軌跡情報保存テーブル740,750から、実施例1の3次元の軌跡情報保存テーブル710~730に変換することも可能である。
図15は、実施例3におけるアバター表示の模式図である。表示画面400において、アバター3を進行方向に向く姿勢(前向き)で表示している。すなわち、現在の軌跡ポイント503から次の軌跡ポイント502へのベクトル方向にアバター3の向きを設定している。これにより、実施例1(図11B)に示したようなアバターの向きにより生じるユーザの違和感(アバターの進行方向とアバターの向きが一致しないこと)を解消することができる。
図16は、実施例4におけるアバター表示の模式図である。ここでは、アバター3を後ろ向きで進行させている。そして移動経路の近くに建物521と建物522が存在し、アバター3が建物521で隠れる場合を示している。このような場合には、アバター3は建物521により隠れる部分を表示しないように制御する。アバター3が隠れるか否かは、建物521、522とアバター3までの距離を比較することで判断でき、建物521、522までの距離は距離センサ53で測定可能である。
HMDの撮像部71は、始点から撮影を開始し、現時点から一定時間(例えば、軌跡収集処理で使用する軌跡ポイント間の単位時間の2倍の長さ)の映像を、常にループ撮影して一時保存する。これにより自動的に撮影される映像は、現時点から一定時間(例えば2秒)だけ遡った動画もしくは静止画となる。静止画の場合は、軌跡ポイントと次の軌跡ポイントとの間に、1個もしくは2個程度の静止画を一時保存するだけで十分機能は発揮できる。そして、移動経路中の特異箇所、例えば移動方向を変えた地点において撮影した映像を残すようにする。
例えば、センサ部50の距離センサ53により、地面もしくは床面からHMD1までの距離(すなわちユーザの頭部の高さ)を検出し、軌跡ポイント毎に収集する。この検出値をユーザの身長(既知)と比較することで、HMD1を装着したユーザの姿勢(立っている、座っている、しゃがんでいる、寝ている等)を推定することができる。この姿勢情報を表示するアバターに反映させて、立っているアバターや座っているアバターなどの表示を行う。
図17Aは、実施例7における軌跡情報保存テーブル710’の例を示す。実施例1(図7A)の軌跡情報保存テーブル710に対し、各軌跡ポイントを通過した通過時刻713を追加して記載している。
(b)に示すように背面側にはカメラ901を有し、外景を撮影する。スマートフォン9の内部には、3次元位置やカメラ901の方向を検出するセンサを有し、HMDと同等に軌跡情報を収集することができる。
図19は、複数のHMDを接続した映像表示システムの構成を示す図である。ここでは、2人のユーザ2a,2bの場合を示し、それぞれHMD1aとHMD1bを装着している。2人以外の場合も同様である。
Claims (13)
- ユーザが携帯し、該ユーザの移動軌跡を映像で表示する映像表示装置において、
当該映像表示装置を携帯した前記ユーザの位置と方向を検出するセンサと、
前記センサの検出結果から前記ユーザの移動軌跡の情報を取得する軌跡情報取得部と、
前記軌跡情報取得部にて取得した前記ユーザの軌跡情報と、前記ユーザを示す仮想映像であるアバターの情報を保存する記憶部と、
前記ユーザの移動軌跡を前記アバターで表示する表示部と、
前記軌跡情報取得部と前記表示部を制御する制御部と、を備え、
前記制御部は、
前記記憶部に保存された前記アバターの情報から前記アバターを生成するとともに、前記センサにより現在の前記ユーザの視界領域を求め、
前記記憶部に保存された前記ユーザの軌跡情報をもとに、現在の前記ユーザの視界領域に合わせ、前記ユーザの移動軌跡に前記生成したアバターを配置して前記表示部に表示することを特徴とする映像表示装置。 - 請求項1記載の映像表示装置において、
前記制御部は前記アバターを前記ユーザの移動軌跡に沿って移動させる際に、時間的に新しい軌跡情報から古い軌跡情報に向かって移動させることを特徴とする映像表示装置。 - 請求項2記載の映像表示装置において、
前記軌跡情報取得部は、前記ユーザの移動軌跡の情報を予め定めた単位時間毎に取得して、各軌跡ポイントの位置座標を前記記憶部に保存し、
前記制御部は、前記単位時間毎、あるいは前記単位時間に任意の係数を乗じた時間毎に、前記記憶部から各軌跡ポイントの位置座標を読み出して、該位置座標に前記アバターを配置することを特徴とする映像表示装置。 - 請求項3記載の映像表示装置において、
前記軌跡情報取得部は、各軌跡ポイントの位置座標を、時間的に1つ前の軌跡ポイントの位置座標との差分値として前記記憶部に保存するとともに、少なくとも終点の軌跡ポイントの位置座標は、絶対値として前記記憶部に保存することを特徴とする映像表示装置。 - 請求項2記載の映像表示装置において、
前記制御部は前記アバターを移動させるときの体の向きを、前記アバターの進行方向とは逆向きに表示することを特徴とする映像表示装置。 - 請求項2記載の映像表示装置において、
当該映像表示装置は前記ユーザが頭部に装着して使用するものであり、
前記センサにより、さらに当該映像表示装置を装着した前記ユーザの頭部の高さと方向を検出し、
前記軌跡情報取得部は、前記センサが検出した前記ユーザの頭部の高さと方向の情報を前記軌跡情報として前記記憶部に保存し、
前記制御部は前記アバターを生成して表示させるとき、前記記憶部に保存された前記ユーザの頭部の高さと方向の情報をもとに、前記ユーザの身長情報と比較して、前記アバターの姿勢と顔の向きを決定することを特徴とする映像表示装置。 - 請求項2記載の映像表示装置において、
前記制御部は、現在の前記ユーザの視界領域内に前記アバターを配置できないとき、前記ユーザに対し、視野方向を変えさせる、または前記アバターの見える位置まで移動させるための誘導処理を行うことを特徴とする映像表示装置。 - 請求項3記載の映像表示装置において、
さらに外景を撮影する撮像部を備え、
前記撮像部で撮影した撮影データを、撮影位置である撮影ポイントと対応付けて前記記憶部に保存し、
前記制御部は、前記アバターの位置が前記撮影ポイントにあるとき、前記記憶部に保存された撮影データの映像を前記表示部に表示することを特徴とする映像表示装置。 - 請求項8記載の映像表示装置において、
前記制御部は、前記撮像部で撮影した撮影データのうち、前記ユーザの移動軌跡の方向が変化した撮影ポイントにおいて撮影された映像を前記記憶部に保存し、
前記制御部は、前記アバターの位置が前記ユーザの移動軌跡の方向が変化した撮影ポイントにあるとき、前記記憶部に保存された撮影データの映像を前記表示部に表示することを特徴とする映像表示装置。 - 請求項3記載の映像表示装置において、
さらに外景を撮影する撮像部を備え、
前記表示部には、前記撮像部で撮影されている現在の映像を表示するとともに、
前記制御部は、前記表示部に表示されている外景の映像に合わせ、前記ユーザの移動軌跡に基づき前記アバターを重畳して表示することを特徴とする映像表示装置。 - 複数のユーザが携帯する複数の映像表示装置を接続して、該複数のユーザの移動軌跡を前記複数の映像表示装置にて映像で表示する映像表示システムにおいて、
前記複数の映像表示装置は、それぞれ、
当該映像表示装置を携帯した当該ユーザの位置と方向を検出するセンサと、
前記センサの検出結果から当該ユーザの移動軌跡の情報を取得する軌跡情報取得部と、
前記軌跡情報取得部にて取得した当該ユーザの軌跡情報と、当該ユーザと他のユーザを示す仮想映像であるそれぞれのアバターの情報を保存する記憶部と、
他のユーザが携帯する他の映像表示装置との間でそれぞれのユーザの軌跡情報を送受信する通信処理部と、
それぞれのユーザの移動軌跡をそれぞれのアバターで表示する表示部と、
前記軌跡情報取得部、前記通信処理部、前記表示部を制御する制御部と、を備え、
前記制御部は、
前記記憶部に保存されたアバターの情報からそれぞれのユーザのアバターを生成するとともに、前記センサにより現在の当該ユーザの視界領域を求め、
前記記憶部に保存された当該ユーザの軌跡情報と、前記通信処理部にて受信した他のユーザの軌跡情報をもとに、現在の当該ユーザの視界領域に合わせ、当該ユーザと他のユーザの移動軌跡に前記生成したそれぞれのアバターを配置して前記表示部に表示することを特徴とする映像表示システム。 - ユーザの移動軌跡を映像で表示する映像表示方法において、
前記ユーザの位置と方向を検出し前記ユーザの移動軌跡の情報を取得するステップと、
取得した前記ユーザの軌跡情報を記憶部に保存するステップと、
前記ユーザを示す仮想映像であるアバターを生成するステップと、
現在の前記ユーザの視界領域を求めるステップと、
前記記憶部に保存された前記ユーザの軌跡情報をもとに、現在の前記ユーザの視界領域に合わせ、前記ユーザの移動軌跡に前記生成したアバターを配置して表示部に表示するステップと、
を備えることを特徴とする映像表示方法。 - 請求項12記載の映像表示方法において、
前記表示するステップでは、前記アバターを前記ユーザの移動軌跡に沿って移動させる際に、時間的に新しい軌跡情報から古い軌跡情報に向かって移動させることを特徴とする映像表示方法。
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- 2019-02-26 US US17/434,400 patent/US12299771B2/en active Active
- 2019-02-26 CN CN201980093082.XA patent/CN113574491A/zh active Pending
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2022
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20210312842A1 (en) * | 2018-12-20 | 2021-10-07 | Ns West Inc. | Display light emission device, head-up display device, image display system, and helmet |
| US11651714B2 (en) * | 2018-12-20 | 2023-05-16 | Ns West Inc. | Display light emission device, head-up display device, image display system, and helmet |
| JP2022544116A (ja) * | 2019-08-07 | 2022-10-17 | マジック リープ, インコーポレイテッド | 複合現実における空間命令およびガイド |
| JP2023130426A (ja) * | 2019-08-07 | 2023-09-20 | マジック リープ, インコーポレイテッド | 複合現実における空間命令およびガイド |
| JP7464694B2 (ja) | 2019-08-07 | 2024-04-09 | マジック リープ, インコーポレイテッド | 複合現実における空間命令およびガイド |
| JP7627720B2 (ja) | 2019-08-07 | 2025-02-06 | マジック リープ, インコーポレイテッド | 複合現実における空間命令およびガイド |
| JP2024119906A (ja) * | 2021-06-28 | 2024-09-03 | グリー株式会社 | 情報処理システム、情報処理方法、情報処理プログラム |
| JP7674008B2 (ja) | 2021-06-28 | 2025-05-09 | グリーホールディングス株式会社 | 情報処理システム、情報処理方法、情報処理プログラム |
| WO2025084164A1 (ja) * | 2023-10-18 | 2025-04-24 | Necプラットフォームズ株式会社 | 可視範囲特定装置、可視範囲表示システム、可視範囲特定方法、可視範囲表示方法、及び、記録媒体 |
| JP2025069489A (ja) * | 2023-10-18 | 2025-05-01 | Necプラットフォームズ株式会社 | 可視範囲特定装置、可視範囲表示システム、可視範囲特定方法、可視範囲表示方法、及びプログラム |
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|---|---|
| JP2023017832A (ja) | 2023-02-07 |
| JP2024050675A (ja) | 2024-04-10 |
| JP2025063131A (ja) | 2025-04-15 |
| US20220044450A1 (en) | 2022-02-10 |
| US12299771B2 (en) | 2025-05-13 |
| JPWO2020174554A1 (ja) | 2020-09-03 |
| JP7855742B2 (ja) | 2026-05-08 |
| US20250259342A1 (en) | 2025-08-14 |
| JP7620128B2 (ja) | 2025-01-22 |
| CN113574491A (zh) | 2021-10-29 |
| JP7427747B2 (ja) | 2024-02-05 |
| JP7168757B2 (ja) | 2022-11-09 |
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