Abstract: A method and apparatus for determining an exposure parameter of a head-mounted device, and a device are provided. The method includes: acquiring an average real brightness value of a region of interest of the image of the current frame; determining an average predicted brightness value of a region of interest of an image of a next frame if the average predicted brightness value is smaller than a lower limit of a first preset threshold range, sequentially selecting exposure parameter values equal to or greater than a current exposure parameter value, in a target exposure list to form a target exposure sub-list; and if the average predicted brightness value is greater than or equal to an upper limit of the first preset threshold range, sequentially selecting exposure parameter values equal to or smaller than the current exposure parameter value in the target exposure list to form a target exposure sub-list.

Abstract: A position detection device of a VR device is provided. A gear rack and a gear are provided between the left lens barrel and the right lens barrel, and the gear rack is made to be occluded with the gear. A magnet is fixed at a preset position, and a magnetic induction intensity of the magnet set based on a relative position relationship between the left lens barrel and the right lens barrel in the VR device is detected by means of a Hall sensor. A distance between the Hall sensor and the magnet is calculated according to the magnetic induction intensity.

Abstract: A method and system for aligning exposure center points of multiple cameras in a VR system are provided. The method includes: acquiring image data of a first type frame according to a preset frame rate; adjusting VTS data of the first type frame, the VTS data changing with the change of the exposure parameters so as to fix a time interval between an exposure center point of the first type frame and an FSIN synchronization signal in a VR system; acquiring image data of a second type frame according to the preset frame rate; and adjusting VTS data of the second type frame according to the VTS data of the first type frame, and fixing a time interval between an exposure center point of the second type frame and the FSIN synchronization signal so as to complete the alignment of exposure center points of the cameras.

Abstract: The disclosure provides a gesture recognition method and device, a gesture control method and device and a virtual reality apparatus, the gesture recognition method includes: obtaining a hand image, acquired by each lens of a binocular camera, of a user; recognizing, through a pre-constructed recognition model, a first group of hand bone points from the obtained hand image, to obtain a hand bone point image in which the first group of recognized hand bone points is marked on a hand region of the hand image; obtaining, according to the obtained hand bone point image, two-dimensional positional relations and three-dimensional positional relations between various bone points in a second group of hand bone points as hand gesture data of the user; and recognizing a gesture of the user according to the hand gesture data.

Abstract: A six degrees of freedom (6 DoF) positioning tracking device and method, and an electronic apparatus are provided. The device includes at least three tracking cameras, an inertial navigation unit and a computation processing unit, where the at least three tracking cameras are distributed at preset angles and are configured to obtain image data in a current environment and transmit the image data to the computation processing unit; the inertial navigation unit is configured to obtain state information of the 6 DoF positioning tracking device in the current environment and transmit the state information to the computation processing unit; and the computation processing unit is configured to determine 6 DoF data of the 6 DoF positioning tracking device relative to the current environment according to the image data and the state information.

Abstract: A head-mounted VR all-in-one machine comprises a front cover plate. Four first tracking cameras are arranged on an outer side frame of the front cover plate, two second tracking cameras are respectively arranged at positions on an inner side of the front cover plate that are close to the left eye and the right eye of a user, and a third tracking camera is arranged at a position on the lower bottom of the front cover plate that is close to the mouth of the user, wherein the four first tracking cameras and an IMU sensor form a 6DoF user head tracking module, the two second tracking cameras form a user eyeball tracking module, the two second tracking cameras and the one third tracking camera form a user facial expression recognition module, and the four first tracking cameras form a user bare hand recognition tracking module in a multiplexed manner.

Abstract: Provided are a method for time synchronization between a head-mounted device and a peripheral device. The method includes: obtaining sample data of an inertial measurement unit of the peripheral device, and determining a first timestamp representing a time at which the sample data is sampled; transmitting an interrupt request and the sample data to the head-mounted device, and determining a second timestamp representing a time at which the interrupt request is transmitted; determining a third timestamp representing a time at which the interrupt request is received by the head-mounted device; and determining a time difference based on the third timestamp and the second timestamp, and performing time compensation for the first timestamp based on the time difference to enable the peripheral device and the head-mounted device to complete the time synchronization with a unified time standard.

Abstract: A sport training method and system and a head-mounted VR device are disclosed. The method is performed by a head-mounted VR device. The head-mounted VR device is wirelessly connected to a hand-motion tracker and a foot-motion tracker.

Abstract: A local perspective method and device of a virtual reality equipment and a virtual reality equipment are disclosed. The method comprises: identifying a user's hand action; triggering a local perspective function of the virtual reality equipment if the user's hand action satisfies a preset trigger action; and under the local perspective function, determining a local perspective display area in a virtual scene according to a position of the user's hand action, so as to display a real scene in the local perspective display area. The local perspective method of the virtual reality equipment according to the present disclosure can determine the range of the area to be perspectively displayed by using the user's hand action. Compared with the conventional global perspective solution, it can be applicable to more and richer application scenarios, and can greatly improve the user's use experience.

Abstract: A VR system and a positioning and tracking method of the VR system are provided. The VR system includes a head-mounted display and a gamepad. The head-mounted display includes a first inertial sensor, a first processor, and first cameras. The gamepad includes a second inertial sensor and second cameras. The first processor is configured to obtain 6DOF data of the head-mounted display under a world coordinate system based on the inertial data of the head-mounted display obtained by the first inertial sensor and the external environment images of the head-mounted display obtained by the first cameras, obtain 6DOF data of the gamepad under the world coordinate system based on the inertial data of the gamepad obtained by the second inertial sensor and the external environment images of the gamepad obtained by the second cameras, and generate 6DOF data of the gamepad on the head-mounted display.

Abstract: The present disclosure provides a gesture operation method, apparatus, device and medium. The method includes: obtaining depth information of a user hand; determining space coordinates of a virtual hand corresponding to the hand in a virtual space based on the depth information; binding trackballs to the virtual hand based on the space coordinates, which includes binding a palm ball to a palm position of the virtual hand, and binding at least one fingertip ball to at least one fingertip position of the virtual hand, a volume of the palm ball being greater than the at least one fingertip ball; and performing a corresponding operation in the virtual space based on a straight-line distance between the at least one fingertip ball and the palm ball.

Abstract: The present application provides a hand tracking method, device and system, wherein the method comprises: determining a current frame image corresponding to each tracking camera respectively; acquiring tracking information of a hand location corresponding to the to-be-detected frame image and two-dimensional coordinates of a preset quantity of skeleton points according to the current frame images and the tracking information of the last frame image of the current frame images; determining three-dimensional coordinates of the preset quantity of skeleton points according to the two-dimensional coordinates and pre-acquired tracking data of a head location corresponding to the hand location; carrying out smoothing filter processing on the three-dimensional coordinates of the skeleton points and historical three-dimensional coordinates of the last frame image so as to acquire processed stable skeleton points; and fusing, rendering and displaying the stable skeleton points and the tracking data of the head location

Abstract: Embodiments of the present disclosure disclose a data transmission method, apparatus, device, and system. The method includes: receiving a broadcast signal from a head-mounted display device, the broadcast signal including at least time synchronization information and/or control data, and the broadcast signal being transmitted in accordance with a predetermined period; and transmitting, in a wireless transmission channel that is obtained in advance, handle data to the head-mounted display device in accordance with a predetermined time interval.

Abstract: A head-mounted display system and a 6-degree-of-freedom tracking method and apparatus thereof are disclosed. The method includes: controlling two channels of tracking cameras so that central moments of exposure durations of each frame of the two channels of tracking cameras are same, and controlling so that a lightening moment of the LED lights on the handle controller is synchronized with the middle moment of the exposure duration of an even-number frame of the two channels of tracking cameras; calculating 6-degree-of-freedom tracking data of the head-mounted display device in a three-dimensional space in real time according to acquired image data of an odd-number frame of the two channels of tracking cameras; and calculating 6-degree-of-freedom tracking data of the handle controller in the three-dimensional space in real time according to acquired image data of an even-number frame of the two channels of tracking cameras.

Abstract: The present disclosure relates to a virtual reality interaction method, a device and a system. The method includes: acquiring relative pose data of a target individual relative to a head-mounted device at a first time point, wherein the target individual is an individual in a reality space where the head-mounted device is located, the target individual and an individual wearing the head-mounted device are different individuals, and the pose data includes position data and posture data; obtaining virtual pose data of the target individual in a virtual scene of the head-mounted device at the first time point according to the relative pose data; and rendering and displaying a virtual individual corresponding to the target individual in the virtual scene according to the virtual pose data.

Abstract: The present disclosure relates to a dynamic changing method and apparatus for a virtual reality scene, and an electronic device, which relate to the technical field of virtual reality. The dynamic changing method for the virtual reality scene comprises: acquiring eye tracking data of a user; acquiring a gaze area of the user in the virtual reality scene according to the eye tracking data; determining a scene modifiable area according to the gaze area; and modifying the scene data of the scene modifiable area.

Abstract: The present application relates to the technical field of image recognition and provides a pinch gesture detection and recognition method, which is applied to an electronic device and includes: acquiring, in real time, image data of each frame in a video to be detected; performing a hand location detection on the image data based on a pre-trained hand detection model, to determine a hand position of the image data; performing a skeleton point recognition at the hand position based on the pre-trained skeleton point recognition model, to determine a preset number of skeleton points at the hand position; and determining whether a hand corresponding to the image data is in a pinch gesture or not according to information of a distance between the skeleton points of preset fingers.

Abstract: Disclosed in the present disclosure is a VR glasses which includes: a screen frame and a bottom plate, wherein the screen frame is fixed to the bottom plate, the bottom plate is provided with two light-transmitting holes symmetrically, and an edge of the screen frame has a first side structure perpendicular to the bottom plate; a first lens barrel and a second lens barrel, wherein the first lens barrel and the second lens barrel communicate with the two light-transmitting holes and each of the first lens barrel and the second lens barrel is provided with a lens; and a transmission mechanism, wherein the transmission mechanism is a stepped adjustment mechanism, the transmission mechanism is arranged close to the first side structure of the screen frame, the first lens barrel and the second lens barrel is configured to move toward each other through the transmission mechanism.

Abstract: The embodiments of the disclosure relate to an image acquisition method, a handle device, a head-mounted device and a head-mounted system. The handle device comprises a shell and a control module arranged in the shell. A switch control end of an infrared circuit is connected with the control module, and infrared light beads of the infrared circuit penetrate outwards through the shell; and a switch control end of a visible light circuit is connected with the control module, and visible light strips of the visible light circuit penetrate outwards through the shell. Through visible light and infrared light set on the handle, the position of the handle device can be judged, and the tracking accuracy is extremely high.

Abstract: Provided is an image transmission method. Left-eye image data and right-eye image data corresponding to a same original image frame in a target video are divided into sub-images on the image processing device side, multiple sets of image data in one-to-one correspondence with the sub-images are generated, and transmitted to the image display device through transmission threads. Each of the multiple sets of image data includes a sub-image, and first and second sequence numbers that correspond to the sub-image. Left-eye image data and right-eye image data corresponding to a same original image frame are obtained by combining sub-images in the multiple sets of image data, by the image display device, based on first and second sequence numbers in the multiple sets of image data. Finally, a left-eye image corresponding to the left-eye image data and a right-eye image corresponding to the right-eye image data are played.