Abstract: A Generative Adversarial Network (GAN) can be trained, where the GAN includes an anomaly-removing Generator network configured to modify a medical image to remove a depiction of a biological anomaly and one or more Discriminator networks (each configured to discriminate between real and fake images). The anomaly-removing Generator network can then receive a medical image that depicts a particular biological anomaly (or pre-processed version thereof) and generate a modified image predicted to lack any depiction of the particular biological anomaly. The size of the particular biological anomaly may be estimated based on the modified image and the received image (or pre-processed version thereof).

Abstract: A virtual reality headset includes multiple illumination sources emitting light towards a user's eye and an image capture device capturing light reflected by the user's eye. The image capture device captures images of light from the illumination sources reflected by the user's corneas when the user looks at a specific location in the virtual reality headset. Based on locations of light having at least a threshold intensity in the captured images, the position of the center of user's eye's pupil is determined in three dimensions and used to determine a distance between the center of user's eye's pupil and a reference point relative to the illumination sources. Distances between centers of pupils of the user's eyes and reference points are used to determine a distance between the centers of the pupils of the user's eyes and a distance from the corneas to an optical system of the headset.

Abstract: A virtual-reality navigation controller includes a base, a seat, a vertical support to support the seat on the base, and a rotatable connector between the seat and the vertical support to tilt the seat about a rotational center of the rotatable connector in response to directional forces exerted by a user seated on the seat. The virtual-reality navigation controller further includes a motion-detection controller to measure pitch corresponding to the tilt of the seat resulting from the directional forces.

Abstract: A virtual-reality navigation controller includes a base and a seating portion. The seating portion includes a seat for supporting a weight of a user seated thereon, and a back-rest coupled to the seat to move integrally with the seat and to support the user's back. The virtual-reality navigation controller further includes a displacement connector between the seating portion and the base to reciprocate the seating portion upwards and downwards, and a motion-detection controller to measure upwards and downwards displacement of the seating portion. The displacement connector is configured to move the seating portion upwards along with the user to support the user when the user ascends from the seat during virtual-reality activities. The displacement connector is further configured to move the seating portion downwards at a slower maximum speed than the upwards movement, when the user's body rests back on the seat.

Abstract: A headset (e.g., VR headset or AR headset) displays a three-dimensional (3D) virtual scene and includes a distance element to dynamically adjust a distance between an optics block and an electronic display included in the headset based on a location in the virtual scene where the user is looking. The headset tracks the user's eyes to approximate gaze lines and determines a plane of focus for a frame of the virtual scene as the intersection of the gaze lines. The distance element adjusts a distance between an optics block and an electronic display so that the optics block is focused at the plane of focus, which keeps the user's eyes in a zone of comfort as vergence and accommodation change.

Abstract: A virtual-reality system includes a head-mounted display system comprising an eye tracker and a display screen comprising an array of pixels. The virtual-reality system monitors movement of a user's eye using the eye tracker. A first plurality of frames for virtual-reality images is displayed on the display screen using a first persistence in accordance with a first display mode. The persistence is a percentage of a frame duration during which the array of pixels is activated. While displaying the first plurality of frames in accordance with the first display mode, a saccade of the user's eye is detected. In response to detecting the saccade, the virtual-reality system switches from the first display mode to a second display mode having a second persistence that is greater than the first persistence. In the second display mode, a second plurality of frames for the virtual-reality images is displayed using the second persistence.

Abstract: A head-mounted display (HMD) (e.g., VR headset or AR headset) displays a 3D virtual scene and includes a mirror to increase a field of view (FOV). The HMD includes an electronic display that further includes a primary display and an extended display, where the content displayed on the primary display is presented to the user's eye at an exit pupil through a lens and content displayed on the extended display is presented at the exit pupil through reflections of the mirror. The mirror is positioned between the exit pupil and the electronic display such that the mirror reflects light originating from the extended display and provides the reflected light to the exit pupil to increase the FOV. The combination of the content viewed through the lens and that of the reflected light of the extended display results in an FOV larger than when the content is viewed only through the lens.

Abstract: A virtual-reality (VR) system includes a head-mounted display (HMD) to receive video input from a stationary computer in a first mode of operation and from a mobile computer in a second mode of operation, and to display images corresponding to the video input. The VR system also includes a headband to secure the HMD on a user's head and a holder mounted on the headband to detachably support the mobile computer.

Abstract: A head-mounted display (HMD) device includes a plurality of activity detection sensors coupled to a liner formed around a periphery of a HMD or a band attached to the HMD. The sensors attached to the liner are adopted for direct or indirect contact to an upper portion of a user's face, and the sensors coupled to the band are adopted for direct or indirect contact with a back side of the user's head. The activity detection sensors detect electrical field signals caused by muscle contractions in an upper portion of a user's face or brain activity signals when the user is wearing the HMD. The HMD includes a module that reconstructs and projects a facial animation model of the user and a cognitive state of the user based on signals from the activity detection sensors while the HMD is in use by the user.

Abstract: A system calibrates one or more head-related transfer functions (HRTFs) for a user. An indicator is presented on a head-mounted display, where the indicator prompts the user to turn the user's head to view the indicator and effectively change the user's head orientation. The head orientation corresponds to positions of both ears, thus a position of the indicator prompting to change the user's head orientation is associated with corresponding positions of both ears. Responsive to the indicator being viewed by the user, a sound source at a fixed position transmits a test sound and the test sound is received at microphones coupled to the user's ears. By analyzing the test sound received at the microphones, a unique HRTF associated with a relative position between the sound source and each ear can be obtained.

Abstract: A virtual-reality navigation controller includes a base, a seat, a vertical support to support the seat on the base, and a rotatable connector between the seat and the vertical support to tilt the seat about a rotational center of the rotatable connector in response to directional forces exerted by a user seated on the seat. The virtual-reality navigation controller further includes a motion-detection controller to measure pitch corresponding to the tilt of the seat resulting from the directional forces.

Abstract: A system calibrates one or more head-related transfer functions (HRTFs) for a user. An indicator is presented on a head-mounted display, where the indicator prompts the user to turn the user's head to view the indicator and effectively change the user's head orientation. The head orientation corresponds to positions of both ears, thus a position of the indicator prompting to change the user's head orientation is associated with corresponding positions of both ears. Responsive to the indicator being viewed by the user, a sound source at a fixed position transmits a test sound and the test sound is received at microphones coupled to the user's ears. By analyzing the test sound received at the microphones, a unique HRTF associated with a relative position between the sound source and each ear can be obtained.

Abstract: A virtual-reality navigation controller includes a base and a seating portion. The seating portion includes a seat for supporting a weight of a user seated thereon and a back-rest coupled to the seat to move integrally with the seat and to support the user's back. The virtual-reality navigation controller further includes a vertical support to support the seating portion on the base, and a rotatable connector between the seating portion and the vertical support to tilt the seating portion about a rotational center of the rotatable connector when the user is seated on the seat. A radius of an arc formed by the tilting about the rotational center ranges from 300 mm to 800 mm. The virtual-reality navigation controller further includes a motion-detection controller to measure pitch corresponding to the tilt of the seating portion.

Abstract: A virtual-reality system includes a head-mounted display system comprising an eye tracker and a display screen comprising an array of pixels. The virtual-reality system monitors movement of a user's eye using the eye tracker. A first plurality of frames for virtual-reality images is displayed on the display screen using a first persistence in accordance with a first display mode. The persistence is a percentage of a frame duration during which the array of pixels is activated. While displaying the first plurality of frames in accordance with the first display mode, a saccade of the user's eye is detected. In response to detecting the saccade, the virtual-reality system switches from the first display mode to a second display mode having a second persistence that is greater than the first persistence. In the second display mode, a second plurality of frames for the virtual-reality images is displayed using the second persistence.

Abstract: A virtual-reality navigation controller includes a base and a seating portion. The seating portion includes a seat for supporting a weight of a user seated thereon, and a back-rest coupled to the seat to move integrally with the seat and to support the user's back. The virtual-reality navigation controller further includes a displacement connector between the seating portion and the base to reciprocate the seating portion upwards and downwards, and a motion-detection controller to measure upwards and downwards displacement of the seating portion. The displacement connector is configured to move the seating portion upwards along with the user to support the user when the user ascends from the seat during virtual-reality activities. The displacement connector is further configured to move the seating portion downwards at a slower maximum speed than the upwards movement, when the user's body rests back on the seat.

Abstract: A virtual-reality navigation controller includes a base and a seating portion. The seating portion includes a seat for supporting a weight of a user seated thereon and a back-rest coupled to the seat to move integrally with the seat and to support the user's back. The virtual-reality navigation controller further includes a vertical support to support the seating portion on the base, and a rotatable connector between the seating portion and the vertical support to tilt the seating portion about a rotational center of the rotatable connector when the user is seated on the seat. A radius of an arc formed by the tilting about the rotational center ranges from 300 mm to 800 mm. The virtual-reality navigation controller further includes a motion-detection controller to measure pitch corresponding to the tilt of the seating portion.

Abstract: A virtual reality headset includes multiple illumination sources emitting light towards a user's eye and an image capture device capturing light reflected by the user's eye. The image capture device captures images of light from the illumination sources reflected by the user's corneas when the user looks at a specific location in the virtual reality headset. Based on locations of light having at least a threshold intensity in the captured images, the position of the center of user's eye's pupil is determined in three dimensions and used to determine a distance between the center of user's eye's pupil and a reference point relative to the illumination sources. Distances between centers of pupils of the user's eyes and reference points are used to determine a distance between the centers of the pupils of the user's eyes and a distance from the corneas to an optical system of the headset.

Abstract: A head-mounted display (HMD) (e.g., VR headset or AR headset) displays a 3D virtual scene and includes a mirror to increase a field of view (FOV). The HMD includes an electronic display that further includes a primary display and an extended display, where the content displayed on the primary display is presented to the user's eye at an exit pupil through a lens and content displayed on the extended display is presented at the exit pupil through reflections of the mirror. The mirror is positioned between the exit pupil and the electronic display such that the mirror reflects light originating from the extended display and provides the reflected light to the exit pupil to increase the FOV. The combination of the content viewed through the lens and that of the reflected light of the extended display results in an FOV larger than when the content is viewed only through the lens.

Abstract: A head-mounted display (HMD) device includes a plurality of activity detection sensors coupled to a liner formed around a periphery of a HMD or a band attached to the HMD. The sensors attached to the liner are adopted for direct or indirect contact to an upper portion of a user's face, and the sensors coupled to the band are adopted for direct or indirect contact with a back side of the user's head. The activity detection sensors detect electrical field signals caused by muscle contractions in an upper portion of a user's face or brain activity signals when the user is wearing the HMD. The HMD includes a module that reconstructs and projects a facial animation model of the user and a cognitive state of the user based on signals from the activity detection sensors while the HMD is in use by the user.

Abstract: A head-mounted display (HMD) system includes a display and a headset, containing the display, to mount on a user's face. The HMD system further includes a nose piece coupled to the headset. The nose piece includes a check valve to allow a uni-directional out-flow of air from inside the nose piece.