Abstract: An image generation system for providing a ghost image free head-up display, the system comprising a display screen having a front surface and a back surface, a picture generation unit for projecting an image towards the display screen for reflection towards a predetermined eye box, and a field lens, wherein the picture generation unit is configured to project light through the field lens such that light is incident on the front surface of the display screen forming a first virtual image, wherein a portion of the light is transmitted through the display screen and is incident on the back surface of the display screen forming a second virtual image, wherein the first and second virtual images have an offset, wherein the field lens is configured such that the offset is below a threshold magnitude and the first and second virtual images are substantially overlaid as viewed from the eye box.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium for intelligently buffering queries from a mobile application. In one aspect, the method may include receiving, by an application programming interface executing on a mobile device, multiple queries, from different software widgets executing on a mobile application, for data from a database stored on the mobile device, determining, by the application programming interface, a level of priority for each query of the multiple queries, providing, by the application programming interface, each of the multiple queries for storage in a data buffer until processing resources of the mobile device are available to process one or more of the multiple queries, and processing each query of the multiple queries against the database stored on the mobile device based on the assigned level of priority.

Abstract: A gradient change detection system for a moving body for detecting a change in a gradient of a traveling path, the gradient change detection system includes a posture detection unit that detects a posture change amount in a rotation direction about a left-right direction with respect to a traveling direction of a moving body, and a gradient change detector that detects a change in a gradient of the traveling path based on the posture change amount or a variation amount in predetermined unit time of the posture change amount.

Abstract: Extended reality content in a video can be varied based on driver attentiveness. The video can be of an external environment of a vehicle and can be presented in real-time on a display located within the vehicle. The display can be a video pass through display. The display can be an in-vehicle display, or it can be a part of a video pass-through extended reality headset. The video can present a view of an external environment of the vehicle as well as extended reality content. A level of attentiveness of a driver of the vehicle can be determined. An amount of the extended reality content presented in the video can be varied based on the level of attentiveness.

Abstract: A thermal imaging system for use with a respirator mask comprising an in-mask display unit, and methods of configuring and operating such a system. The system uses a thermal imaging camera to capture a thermal image. The system is configured with the capability to shift from a default view in which an in-mask micro-display of the in-mask display unit shows a primary subimage of the captured thermal image but does not show a secondary subimage of the captured thermal image, to an auxiliary view in which the secondary subimage is now shown in place of at least a portion of the primary subimage.

Abstract: There is provided a control apparatus that includes at least one processor to: identify an unrecognizable area not possible to be recognized from a moving object; calculate an arrival time taken by the moving object to arrive at a location in the unrecognizable area; set a first region and a second region in the unrecognizable area based on the arrival time; set an alerting level for the first region and an alerting level for the second region different from each other; control transmitting warning information to an external apparatus; and control the moving object based on response information received from the external apparatus in response to the warning information. The warning information includes location information of the first region and location information of the second region; and information indicating the alerting level set for the first region and the alerting level set for the second region.

Abstract: An image display device includes an observation optical system configured to guide light toward the eyes of an observer, a casing supporting the observation optical system so as to be movable along a predetermined path, a first heat dissipation part and a second heat dissipation part that are provided in the casing, positioned in opposite directions along the path with respect to the observation optical system, and configured to dissipate heat generated in the casing. A heat transfer part connects the first heat dissipation part and the second heat dissipation part so as to transfer heat between them.

Abstract: An apparatus, method for lens barrel distance adjustment, device and computer medium are provided. The method includes: obtaining an eye image of a user; determining a pupillary distance of the user based on the eye image; obtaining a first output voltage determined by a hall sensor; in response to that the first output voltage indicates that an absolute value of a difference value between a distance between left and right lens barrels of a head-mounted device and the pupillary distance of the user is greater than a predetermined threshold, sending a control instruction corresponding to the difference value to an adjustment circuit, causing the adjustment circuit to adjust a distance between the left and right lens barrels based on the control instruction. The hall sensor and the adjustment circuit are provided on the head-mounted device.

Abstract: Head wearable display (HWD) systems and methods of display reliability verification with respect to the HWD operated by a user are provided, which comprise tracking a position and orientation (P&O) of the HWD relative to hardware element(s) at known position(s), which are selected from a surroundings of the user and are visible to the user through the HWD, calculating position(s) of the hardware element(s) with respect to the HWD, and displaying, in the HWD and according to the calculated position(s), verification symbol(s) that correspond to the hardware element(s). Display reliability verification may be carried out automatically using a camera and an image processing module, optionally with an additional illuminator, which compares the element(s)'s captured locations with the element (s)'s expected location according to the tracking, and indicates possible discrepancies. Discrepancy identification may be used to initiate a correction process or to indicate the presented symbology to be unreliable.

Abstract: An electronic tracking system for assisting a user in determining distances to landmarks and objects in a sporting environment includes a user tracking system for determining the location of a user, a heads up display for displaying information to the user, and a processor operable to communicate with the user tracking system and the heads up display. The heads up display is designed to be worn on the user's head, and to display an image within the user's field of view. The processor is programmed to determine a distance between the user's determined location and an object or a landmark on. This information is displayed via the heads up display as a numeric representation of the determined distance.

Abstract: Disclosed are an astronomical telescope stand, an auxiliary calibration method for the astronomical telescope and an astronomical telescope system. The astronomical telescope includes at least two rotating shafts perpendicular to each other, each rotating shaft is provided with an encoder; an electronic camera shooting in the same direction as the telescope to be mounted; a display screen; a processor that connects with the encoder, the electronic camera and the display screen; the processor includes an image information parsing module, an electronic image generation module and a coordinate correction module. The telescope is mounted on the stand, and the electronic camera shoots the same image as the image observed by the telescope. The image information parsing module solves the image to obtain the center coordinate and the field size of the image. The electronic image generation module generates the simulated image according to the center coordinate and the field size.

Abstract: A thin film structure including ferroelectrics and anti-ferroelectrics and a semiconductor device including the same are provided. The thin film structure includes a first anti-ferroelectric layer comprising anti-ferroelectrics, a second anti-ferroelectric layer disposed apart from the first anti-ferroelectric layer and including anti-ferroelectrics, and a ferroelectric layer between the first anti-ferroelectric layer and the second anti-ferroelectric layer and including ferroelectrics.

Abstract: A transparent optical device configured to be used with an underlying device. The underlying device is configured to provide output light. The optical device is configured to transmit light from the underlying device through the optical device. The optical device includes first and second zones. The first zone includes a first plurality of active elements configured to cause the first zone to have a first optical performance capability and a first plurality of transparent regions formed in the first zone allowing light to pass through from the underlying device. The second zone includes a second plurality of active elements configured to cause the second zone to have a second optical performance capability that is different than the first optical performance capability and a second plurality of transparent regions formed in the second zone which allow light in the first spectrum to pass through from the underlying device.

Abstract: A nightvision system includes an underlying device that provides output light in a first spectrum. A transparent optical device transmits light in the first spectrum from the underlying device through the transparent optical device. The transparent optical device includes an active area of a semiconductor chip. The active area includes active elements that cause the underlying device to detect light from the underlying device and transparent regions formed in the active area which are transparent to the light in the first spectrum to allow light in the first spectrum to pass through from the underlying device to a user. An image processor processes brightness maps produced using light detected by the first plurality of active elements. An illuminator coupled to the image processor inputs light into the underlying device based on image processing performed by the image processor.

Abstract: A transparent display panel and a control method and apparatus therefor, a display system, and a computer-readable storage medium. The transparent display panel includes: a liquid crystal panel (11), and a transflective optical film layer (12) disposed on one side of the liquid crystal panel (11), wherein a plurality of microstructures (31) for scattering incident light rays are provided in the transflective optical film layer (12), in order to present a projected image. The transparency level of the transparent display panel is determined by acquiring the ambient light intensity of the transparent display panel or a grayscale average of a projected image at each first region, and the light transmittance level of the liquid crystal panel is adjusted according to the transparency level, thereby improving the projection display effect.

Abstract: A vehicle display control device installed at a host vehicle configured to travel by drive source, the device includes a memory, a processor coupled to the memory, and a display device. In a case in which predetermined travel assistance function is not in operation, the processor controls the display device such that a first display image is projected onto a display region, the first display image including information indicating drive state of the drive source and information corresponding to a travel state of the host vehicle, and in a case in which the predetermined travel assistance function is in operation, the processor controls the display device such that a second display image is projected onto the display region, the second display image omitting display of the drive information and including a symbol indicating the predetermined travel assistance function and information indicating an operation state of the predetermined travel assistance function.

Abstract: The occlusion is faithfully expressed even in the binocular vision in the AR display by a head mounted display apparatus or the like. A head mounted display apparatus 10 includes a lens, a lens, a camera, a camera, and a control processor. A CG image for a right eye is displayed on the lens. A CG image for a left eye is displayed on the lens. The camera captures an image for the right eye. The camera captures an image for the left eye. The control processor generates the CG image for the right eye in which occlusion at the time of seeing by the right eye is expressed and the CG image for the left eye in which occlusion at the time of seeing by the left eye is expressed, based on the images captured by the cameras and projects the generated CG image for the right eye and CG image for the left eye onto the lenses and. A center of a lens of the camera is provided at the same position as a center of the lens. A center of a lens of the camera is provided at the same position as a center of the lens.

Abstract: A device includes at least one transient image having optical properties which vary depending on the angle of observation, with the image(s) consisting of a set of three-dimensional microstructures arranged in a plurality of subsets. Each subset consists of microstructures having an equivalent or identical planar angle ?. A security document can include such a device and the device can be used as a security element.

Abstract: A viewing device comprising a controller, a transparent display and a visual shutter. The controller is configured to determine a color of virtual content to be displayed; determine a background color contrasting the virtual content displayed; determine a display area corresponding to where the virtual content is to be displayed; cause the visual shutter to enable a background to the virtual content to be displayed, the background having the contrasting background color thereby providing a contrasting background to the displayed virtual content (DVC); and to cause the transparent display to display virtual content for overlapping at least one visual object (VO) perceivable through the transparent display at least partially onto the background. The visual shutter is configured to enable the background by operating in a mode wherein at least a portion of the visual shutter is blocked to obstruct the VO in the blocked portion of the visual shutter.

Abstract: The present disclosure provides a display panel, a manufacturing method thereof, and a display device. The display panel includes a first transistor. The first transistor includes a first semiconductor layer, and the first semiconductor layer includes bismuth selenium oxide materials to enhance mobility of the first transistor and improve electrical performance of the display panel, so that the display panel meets requirements of high refresh rate and high transmittance.

Abstract: An approach for modifying in real-time by removing or reinforcing stroboscopic effect from images associated with a viewing experience is disclosed. The approach includes identifying video clips, detecting environmental parameters and calculating display setting. The approach also analyzes display setting using recommendation from GAN, output displaying setting on an AR display and receiving feedback from user.

Abstract: Handheld location based games are provided in which a user's physical location correlates to the virtual location of a virtual character on a virtual playfield. Augmented Reality (AR) systems are provided in which video game indicia are overlaid onto a user's physical environment. A landscape detector is provided that may obtain information about the user's landscape, in addition to the user's location, in order to provide overlaying information to an AR head-mounted display and control information to non-user controlled video game characters.

Abstract: Techniques for a witness report assistant are provided. At least one camera captures at least one image of an incident scene. The incident scene is a location of an incident. A description is of the incident is received from a witness to the incident. The description of the incident includes a generic reference to an element of the incident scene. The description of the incident scene is transcribed to create a textual description. The element of the incident scene within the at least one image of the incident scene is identified. A specific identifier associated with the element of the incident scene is determined. The textual transcript of the description is supplemented with the specific identifier.

Abstract: A method and apparatus are described that detects, via an electronic processor, a first orientation of a mobile device relative to an orientation of a gaming device. The method and/or apparatus further provides, by the electronic processor via a user interface of the mobile device, at least one bet placement option for a game conducted by the gaming device, in response to detecting the first orientation. After detection of a selection of the at least one bet placement option, the method and/or apparatus detects, via the electronic processor, a change from the first orientation of the mobile device to a second orientation different from the first orientation. The method and/or apparatus further presents, by the electronic processor via the user interface, at least one game play option for the game in response to detecting the change from the first orientation to the second orientation.

Abstract: Disclosed are embodiments of in-situ display monitoring and calibration systems and methods. An image acquisition system captures images of the viewing plane of the display. Captured images may then be processed to characterize various visual performance characteristics of the display. When not in use capturing images of the display, the image acquisition system can be stored in a manner that protects it from environmental hazards such as dust, dirt, precipitation, direct sunlight, etc. A calibration image in which a plurality of light emitting elements is set to a particular color and intensity may be displayed, an image then captured, and then a difference between what was expected and what was captured may be developed for each light emitting element. Differences between captured images and expected images may be used to create a calibration data set which then may be used to adjust the display of further images upon the display.

Abstract: Disclosed is an image processing device. The image processing device includes an input unit, and a processor which retargets an image frame input through the input unit and acquires an output image frame, wherein the processor identifies an area, in which pixel values are to be padded, on the basis of the input image frame and information about the output image frame, identifies a first pixel block on the basis of a target pixel area included in the identified area, identifies a second pixel block on the basis of pixel values included in the first pixel block, and pads the target pixel area on the basis of pixel values included in the second pixel block, so as to able to acquire the output image frame.

Abstract: A projection system includes a projection device and a control module. The projection device is configured to project (i) a first image in a first virtual image plane, and (ii) a second image in a second virtual image plane, wherein the second virtual image plane is further from an eyebox than the first virtual image plane. The control module is configured to: determine an ambient light luminance level; determine a first luminance level for the first virtual image plane based on the ambient light luminance level; determine a second luminance level of the second virtual image plane based on the first luminance level of the first virtual image plane; and control the at least one projection device to display (i) the first image in the first virtual image plane having the first luminance level, and (ii) the second image in the second virtual image plane having the second luminance level.

Abstract: A three-dimensional data creation method includes: creating first three-dimensional data from information detected by a sensor; receiving encoded three-dimensional data that is obtained by encoding second three-dimensional data; decoding the received encoded three-dimensional data to obtain the second three-dimensional data; and merging the first three-dimensional data with the second three-dimensional data to create third three-dimensional data.

Abstract: A display device according to the present disclosure includes a first optical unit having positive power, a second optical unit including a first diffraction element and having positive power, a third optical unit having positive power, and a fourth optical unit including a second diffraction element and having positive power, and the first to fourth optical units are provided along an optical path of imaging light emitted from an imaging light generating device. The second optical unit further includes a first member provided at one surface side of the first diffraction element, and a second member provided on a side of the first member opposite to a side where the first diffraction element is located, the first member is transmissive and has an elastic modulus of 50 GPa or greater, and the second member is transmissive and has optical power.

Abstract: A vehicle display device includes: an image display configured to emit display light of an image; an optical system configured to project the display light emitted from the image display onto a reflection face ahead of a driver; and an adjustment part provided in an optical path of the display light from the image display to the reflection face, in which the image includes: a first region visible to both eyes of the driver; and a second region that is closer to ends in the image width direction than the first region in the image is, the adjustment part is disposed at a position corresponding to the boundary between the first region and the second region, and the adjustment part is configured such that the amount of the display light penetrating the adjustment part is reduced toward the ends in the image width direction.

Abstract: This specification describes an apparatus, method and computer program relating to virtual reality, particularly augmented reality (AR) or mixed reality (MR). The method may comprise providing, based on a position associated with a display means, different first and second sets of virtual content for overlaid display at the display means at a first time and determining that the first set of virtual content is prioritized over the second set of virtual content. Based on the determination, the method may comprise prioritizing display of the first set of virtual content over the second set of virtual content at the display means, and enabling display of the second set of virtual content at a second, subsequent, time.

Abstract: A system for a head-up display for an electric aircraft is presented. The system includes an augmented reality device which may be operated by a pilot using a pilot device and a computing device connected to the pilot device, wherein the computing device is configured to receive an aircraft datum and generate a performance assessment model. The performance assessment model includes a plurality of information relevant to the operation of the electric aircraft. The augmented reality device further includes a projection device configured to project the performance assessment model onto an exterior view window and display the performance assessment model as a function of the projection device.

Abstract: Aspects of the present disclosure involve a system comprising a computer-readable storage medium storing at least one program, method, and user interface to facilitate context based augmented reality communication between multiple users over a network. Virtual content item configuration data indicative of a selection by a first user of virtual content item to apply to a real-world environment that is visible to a second user via a second device is received from a first device. The virtual content item configuration data also includes one or more criteria to trigger application of the virtual content item to the real-world environment. A triggering event is detected based on satisfaction of the one or more criteria determined from context data generated at the second device. The second device presents the virtual content item overlaid on the real-world environment that is visible to the second user based on the triggering event.

Abstract: The occlusion is faithfully expressed even in the binocular vision in the AR display by a head mounted display apparatus or the like. A head mounted display apparatus 10 includes a lens 12, a lens 13, a camera 14, a camera 15, and a control processor 16. A CG image for a right eye is displayed on the lens 12. A CG image for a left eye is displayed on the lens 13. The camera 14 captures an image for the right eye. The camera 15 captures an image for the left eye. The control processor 16 generates the CG image for the right eye in which occlusion at the time of seeing by the right eye is expressed and the CG image for the left eye in which occlusion at the time of seeing by the left eye is expressed, based on the images captured by the cameras 14 and 15 and projects the generated CG image for the right eye and CG image for the left eye onto the lenses 12 and 13. A center of a lens of the camera 14 is provided at the same position as a center of the lens 12.

Abstract: A lens assembly, related methods and constituent optical elements are described. The assembly may be used to direct and focus light for various applications. In one instance, the lens assembly is used in conjunction with one or more sources of light such as projected images or video as part of a virtual reality system. The lens assembly includes two or more optical elements arranged to receive light or direct light through different spatial regions of the assembly at different focal powers corresponding to a first user viewing zone and a second user viewing zone. In one instance, the first user viewing zone is a peripheral viewing zone and the second viewing zone is a primary or non-peripheral viewing zone (or vice versa).

Abstract: A first optical unit having positive power a second optical unit including a first diffraction element and having positive power a third optical unit having positive power and a fourth optical unit including a second diffraction element and having a positive power. In the optical path, a first intermediate image of the image light is formed between the first optical unit and the third optical unit, a pupil is formed between the second optical unit and the fourth optical unit, a second intermediate image of the image light is formed between the third optical unit and the fourth optical unit, an exit pupil is formed on a side of the fourth optical unit opposite to the third optical unit, and a prism member configured to correct a ray shape of the image light is provided between the second optical unit and the fourth optical unit.

Abstract: A method for transforming extended video data for display in virtual reality processes digital extended video data for display on a center screen and two auxiliary screens of a real extended video cinema. The method includes accessing, by a computer executing a rendering application, data that defines virtual screens including a center screen and auxiliary screens, wherein tangent lines to each of the auxiliary screens at their respective centers of area intersect with a tangent line to the center screen at its center of area at equal angles in a range of 75 to 105 degrees. The method includes preparing virtual extended video data at least in part by rendering the digital extended video on corresponding ones of the virtual screens; and saving the virtual extended video data in a computer memory. A corresponding playback method and apparatus display the processed data in virtual reality.

Abstract: A gameplay system for providing interactivity based on a piece of merchandise or another object held or worn by a player. The system includes an object identification assembly, which may be a modified computer vision system, that operates to sense, for a gameplay participant, the presence and identity of a particular augmenting object such as themed merchandise worn or held by a rider of a theme park ride. The sensing may be performed by detecting an on-and-off pattern of light emitted from the object. In response, the gameplay system selects or modifies the interactive features of gameplay associated with the participant based on the identified augmenting object. For example, the interactive features are selected from memory by the gameplay system controller to match a character associated with the augmenting object during any interactive gameplay. This allows the gameplay participant to choose their abilities or powers for gameplay.

Abstract: A desensitization device includes an acquisition module for acquiring the current flight parameters of the aircraft, a generation module for generating a first image depicting flight symbology including at least one reference zero pitch line, a generation module for generating a second image depicting topography of terrain overflown by the aircraft, a generation module for generating a third image including at least two portions separated by a separating line, a generation module configured to generate a fourth image by superposing the first image, the second image and the third image in that order, the first image being placed in the foreground, and a transmission module configured to transmit, to a user device, a signal that is representative of the fourth image.

Abstract: Data presented in a visual image is monitored and verified. A processing component receives data from sensors and other sources, and interprets the data to generate processed data. A render component generates a visual image based on the processed data. A projector component projects the image, which is received by a splitter component that splits the light stream of the image and routes a portion of light energy to the display screen viewed by the user and another portion of the light energy to a data verification component (DVC). DVC interprets information presented in the image to determine the data being presented to the user by the image. DVC also receives the processed data from the processing component. DVC compares the data determined from the image to the processed data to determine whether they match and takes appropriate responsive action if they do not match.

Abstract: A virtual reality system enables a user to interact with virtual objects. The system includes a fiducial ring, an imaging device and a console. The fiducial ring includes a ring body that includes a plurality of fiducial markers that each correspond to a different location on the ring body. An imaging device is configured to capture one or more images of the fiducial ring. The console receives the images that include an image of one or more fiducial markers. Based on the received images of the fiducial markers, the console determines a location on the fiducial ring that corresponds to the imaged fiducial marker. The console determines a position of the fiducial ring based on the determined location of the fiducial marker on the fiducial ring. The console provides content to a head mounted display (HMD) based on the determined position of the fiducial ring.

Abstract: According to various embodiments, an electronic device includes a housing, a display viewable through a front surface of the housing and configured to display a screen, a camera sensor disposed in at least a portion of the front surface of the housing and configured to measure an external illuminance, a processor operationally connected to the display and the camera sensor; and a memory operationally connected to the processor. The memory may store instructions that, when executed, cause the processor to control the electronic device to: detect an turn-on event of the display, turn on the camera sensor to acquire the external illuminance using the camera sensor based on the display being turned on, acquire preview image information for a specified time through the camera sensor, turn off the camera sensor, acquire the external illuminance using an exposure time and a brightness value based on the acquired preview image information, and control a luminance of the display based on the external illuminance.

Abstract: Handheld location based games are provided in which a user's physical location correlates to the virtual location of a virtual character on a virtual playfield. Augmented Reality (AR) systems are provided in which video game indicia are overlaid onto a user's physical environment. A landscape detector is provided that may obtain information about the user's landscape, in addition to the user's location, in order to provide overlaying information to an AR head-mounted display and control information to non-user controlled video game characters.

Abstract: The present description relates to light patterns used in a live action scene of a visual production to encode information associated with objects in the scene, such as movement and position of the objects. A data capture system includes active markers that emit light of a particular wavelength in predefined strobing patterns. In some implementations, the active markers are instructed to emit an assigned signature pattern of light through a signal controller sending signals to a control unit. Various components are synchronized such that pulsing of light corresponds to time slices and particular frames captured by the performance capture system. The data representing the pattern is embedded in illuminated and blank frames. Frames showing the light pattern are analyzed to extract information about the active markers, such as identification of the active markers and objects to which they are attached.

Abstract: Methods, systems, and media for rendering immersive video content with foveated meshes are provided. In some embodiments, the method comprises: receiving a video content item; determining, using a hardware processor, whether the video content item meets at least one criterion; in response to determining that the video content item meets the at least one criterion, generating, using the hardware processor, a foveated mesh in accordance with a foveation ratio parameter on which frames of the video content item are to be projected, wherein the foveated mesh has a non-uniform position map that increases pixel density in a central portion of each frame of the video content item in comparison with peripheral portions of each frame of the video content item; and storing the video content item in a file format that includes the generated foveated mesh, wherein the immersive video content is rendered by applying the video content item as a texture to the generated foveated mesh.

Abstract: Systems and methods disclosed herein include systems and methods for delivering secondary content to a plurality of user devices, the secondary content comprising events synchronized to primary content. The process can include: delivering an application to a plurality of user devices, the application configured to play or executed secondary content on the user devices; and causing the secondary content executed on the user devices to be synchronized with primary content.

Abstract: A display device of the present disclosure includes, along an optical path of image light emitted from an image light generating device, a first optical unit having positive power, a second optical unit that includes a first diffraction element and has positive power, a third optical unit having positive power, and a fourth optical unit that includes a second diffraction element and has positive power. A first diffraction angle of the image light at the first diffraction element is different from a second diffraction angle of the image light at the second diffraction element. A correction optical system that corrects an incident angle of the image light with respect to the second diffraction element is provided between the first optical unit and the fourth optical unit on the optical path.

Abstract: The present description relates to light patterns used in a live action scene of a visual production to encode information associated with objects in the scene, such as movement and position of the objects. A data capture system includes active markers that emit light of a particular wavelength in predefined strobing patterns. In some implementations, the active markers are instructed to emit an assigned signature pattern of light through a signal controller sending signals to a control unit. Various components are synchronized such that pulsing of light corresponds to time slices and particular frames captured by the performance capture system. The data representing the pattern is embedded in illuminated and blank frames. Frames showing the light pattern are analyzed to extract information about the active markers, such as identification of the active markers and objects to which they are attached.

Abstract: A display device according to the present invention includes, along an optical path of image light emitted from an image light generating device, a first optical unit having positive power, a second optical unit having positive power and including a first diffraction element of a reflective type, a third optical unit having positive power, and a fourth optical unit having positive power and including a second diffraction element of a reflective type. The second optical unit includes a first light-transmitting member having optical power and provided at a first surface of the first diffraction element, and a light shielding member provided at a second surface of the first diffraction element.

Abstract: First and second head up displays are installed so an angle ? at which a first and second center line intersect is ?=?+? and a distance PD between a first and second virtual emission point, is PD=L(M?L(W?D)/(H?W))/W. The ? is ?=arctan(W/2L), the ? is an angle of view of first or second virtual emission point, the W is a length of an eye box in a width direction of a vehicle, the L is a distance from an eye point to a virtual image plane, the M is a distance from the eye point to a point where a virtual image cannot be seen, the D is an interval between both eyes, and the H is a length of the virtual image plane on which the virtual image is displayed, in the width direction of the vehicle.