Abstract: An antenna structure is capable of transceiving signals for a head-mounted wireless transmission display device including a display screen assembly. The antenna structure includes at least two body portions. Each of the body portions has at least a signal transceiving end. The body portions are respectively arranged at left and right sides of the display screen assembly. The signal transceiving ends of the body portions are extended outward from the left and right sides of the display screen assembly respectively. A first distance between the two signal transceiving ends is greater than a width of the display screen assembly.

Abstract: A communication device includes a first FSS (Frequency Selective Surface) element, a second FSS element, a feeding radiation element, and at least one DLA (Dielectric Laser Accelerator). The second FFS element is adjacent to the first FSS element. The feeding radiation element generates an electromagnetic signal. The electromagnetic signal is propagated by using the first FSS element and the second FSS element. The DLA transmits at least one electron beam. An antenna structure is formed by the first FSS element, the second FSS element, and the feeding radiation element. A coupling effect is induced between the electron beam and the electromagnetic signal, such that the radiation energy of the electromagnetic signal is enhanced.

Abstract: Embodiments of the disclosure provide a tracking information alignment method, a tracking system and a computer-readable storage medium. The method includes: displaying, by a first tracking device, an information pattern through an outward display; capturing, by a second tracking device, the information pattern, and accordingly determining a reference relative pose between the first tracking device and the second tracking device, and obtaining device information of the first tracking device; after the first tracking device and the second tracking device establish a connection based on the device information, sending, by the first tracking device, a first device pose of the first tracking device to the second tracking device through the connection; and determining, by the second tracking device, a coordinate conversion relationship based on the reference relative pose and the received first device pose, and accordingly converting the received first device pose into a first reference device pose.

Abstract: A head-mounted display and a method of sound recording are provided. The method includes: disposing a microphone array on a head-mounted display and aligning a first microphone of the microphone array and a second microphone of the microphone array along a first direction, wherein the head-mounted display captures an image through a camera; controlling the first microphone and the second microphone to form a first acoustic beam; and capturing a first sound signal corresponding to the image according to the first acoustic beam, and outputting a processed sound signal associated with the first sound signal.

Abstract: A communication device includes a frequency boost module, an antenna element, an electrode element, and a baseband signal processor. The antenna element is coupled to the frequency boost module. The baseband signal processor includes a signal generator, a controller, and a switch element. The signal generator generates an RF (Radio Frequency) signal. The signal generator has a first transmission path, a second transmission path, and a third transmission path. The first transmission path is coupled to the frequency boost module. The third transmission path is coupled to the electrode element. The controller generates a control signal. The switch element selectively couples the second transmission path to the frequency boost module or the electrode element according to the control signal.

Abstract: An optical device includes a metamaterial lens element and an imager element. The metamaterial lens element includes a first light transformation layer and a second light transformation layer. The first light transformation layer includes a plurality of first dielectric units with a first refractive index, and a plurality of second dielectric units with a second refractive index. The first dielectric units are interleaved with the second dielectric units. The second light transformation layer is adjacent to the first light transformation layer. The second light transformation layer includes a plurality of third dielectric units with a third refractive index, and a plurality of fourth dielectric units with a fourth refractive index. The third dielectric units are interleaved with the fourth dielectric units. The metamaterial lens element is disposed on the imager element.

Abstract: A communication device includes a wearable device, a fabric element, and an auxiliary radiation element. The wearable device includes a main radiation element and a signal source. The main radiation element has a feeding point. The feeding point is coupled to the signal source. The auxiliary radiation element is disposed on the fabric element. When the wearable device is integrated with the fabric element, the auxiliary radiation element is adjacent to the main radiation element, such that an antenna structure is formed by the main radiation element and the auxiliary radiation element.

Abstract: The embodiments of the disclosure provide a method and system for retrieving querying results, and a computer readable storage medium. The method includes: reading a private data; performing an irreversible transformation on the private data to generate a reference data; transmitting a first query data to a server, wherein the first query data is determined according to the reference data; querying a public database based on the first query data to retrieve a plurality of first querying results; transmitting the plurality of first querying results and first information associated with the plurality of first querying results to the client device; determining a plurality of second querying results among the plurality of first querying results based on the first information; and showing second information associated with the plurality of second querying results.

Abstract: A spatial map information generating apparatus, method, and coordinate system integrating apparatus are provided. The apparatus receives a plurality of keyframes, and the keyframes are generated by a plurality of apparatuses located in a plurality of boundary regions. The apparatus compares the keyframes to obtain a plurality of similar keyframes corresponding to at least one overlapping area of the boundary regions. The apparatus integrates the similar keyframes corresponding to the at least one overlapping area to generate spatial map information corresponding to the boundary regions.

Abstract: Provided are a method for correcting tracking information and a tracking system. The method includes: during a tracking information correction process, obtaining, by a host, multiple host keyframes collected by the host within a first time interval; obtaining, by a tracker, multiple tracker keyframes and multiple tracker map points collected by the tracker within the first time interval; and correcting, by the host or tracker, the tracker keyframes and the tracker map points at least based on the host keyframes.

Abstract: Provided are a method for correcting tracking information and a tracking system. The method includes: during a tracking information correction process, obtaining, by a host, multiple host keyframes collected by the host within a first time interval; obtaining, by a tracker, multiple tracker keyframes and multiple tracker map points collected by the tracker within the first time interval; and correcting, by the host or tracker, the tracker keyframes and the tracker map points at least based on the host keyframes.

Abstract: An eye tracking device and a method for eye tracking are provided. The method includes: obtaining an eye image set; inputting the eye image set to a machine learning model to obtain an estimated eye image; and performing eye tracking according to the estimated eye image.

Abstract: A host, a tracking system, and a tracking method are described herein. A storage circuit is configured to store a program code. A processor is coupled to the storage circuit and configured to access the program code to execute: aligning a real coordinate system of a real world with a virtual coordinate system of a virtual world; obtaining a detecting status of a real object in the real world through an object sensor; obtaining a reference status in the real world; in response to a touch action to the real object, comparing the detecting status with the reference status; and in response to a status difference between the detecting status and the reference status being greater than a threshold value, calibrating a virtual object coordinate of the virtual object.

Abstract: The embodiments of the disclosure provide a method for managing visual content, a host, and a computer-readable storage medium. The method includes, during a recording phase for recording 3D visual content, recording content information associated with the 3D visual content, wherein the content information associated with the 3D visual content includes at least one of an input event occurring on an input device, an object pose of a target object, and 3D object information corresponding to a 3D content object; and during a playback phase for playing back the recorded 3D visual content, playing back the recorded 3D visual content based on the content information of the recorded 3D visual content.

Abstract: The embodiments of the disclosure provide a method for providing an input event to a virtual object, a host, and a computer readable storage medium. The method includes: displaying a first virtual object in a virtual world, wherein the first virtual object includes a plurality of coordinates; obtaining at least one mapping relationship between control events of an input object and the plurality of coordinates on the first virtual object; receiving a control event from the input object; determining a first target coordinate, among the plurality of coordinates, corresponding to the control event based on the at least one mapping relationship, and providing a first input event to the first virtual object based on the first target coordinate, wherein the first input event corresponds to the control event from the input object.

Abstract: The embodiments of the disclosure provide a method for generating a pass-through view with better scale and a host. The method includes: in response to determining that the tracker status of a tracker satisfies a predetermined condition, generating a target depth map based on a predetermined depth map or a first depth map associated with a field of view (FOV) of the host and a tracker information associated with the tracker; and rendering the pass-through view based on an image associated with the FOV of the host, a camera parameter, and the target depth map.

Abstract: A virtual image display system and an operation method thereof are provided. The operation method of the virtual image display system includes: using a plurality of cameras to perform image capturing action on a target portion of a user and obtain a plurality of image information; using the cameras to obtain a plurality of position information corresponding to the target portion according to the image information; using a head-mounted display (HMD) to receive the position information, calculate an extrinsic parameter according to the position information, and establish a plurality of re-projection image information according to the extrinsic parameter and the position information; using the HMD to obtain a plurality of error information according to a prediction image information and the re-projection image information; and using the HMD to display each error information and calibrate the extrinsic parameter to obtain a calibrated extrinsic parameter according to the error information.

Abstract: A host, a tracking system, and a tracking method are described herein. A storage circuit is configured to store a program code. A processor is coupled to the storage circuit and configured to access the program code to execute: aligning a real coordinate system of a real world with a virtual coordinate system of a virtual world; obtaining a detecting status of a real object in the real world through an object sensor; obtaining a reference status in the real world; in response to a touch action to the real object, comparing the detecting status with the reference status; and in response to a status difference between the detecting status and the reference status being greater than a threshold value, calibrating a virtual object coordinate of the virtual object.

Abstract: An image displaying method is disclosed. The image displaying method includes the following operations: capturing a first image of a real space by a camera based on a first viewing direction when the camera is located at a first camera position, wherein the first image includes a first text image; detecting a text region according to the first image by a processor, wherein the text region includes the first text image; recognizing the first text image to obtain a first text content by the processor; obtaining several first feature points of the text region according to the first image by the processor; creating a first virtual surface according to the several first feature points by the processor; and displaying a first virtual image with the first text content appending to the first virtual surface by a display circuit.