235 results about "Eye tracking system" patented technology

Systems and methods are disclosed for displaying data on a head's-up display screen. Multiple forms of data can be selectively displayed on a semi-transparent screen mounted in the user's normal field of view. The screen can either be mounted on the user's head, or mounted on a moveable implement and positioned in front of the user. A user interface is displayed on the screen including a moveable cursor and a menu of computer control icons. An eye-tracking system is mounted proximate the user and is employed to control movement of the cursor. By moving and focusing his or her eyes on a specific icon, the user controls the cursor to move to select the icon. When an icon is selected, a command computer is controlled to acquire and display data on the screen. The data is typically superimposed over the user's normal field of view.

A system and methods for geometric calibration and use of head-worn multi-camera eye tracking system are provided. The system calibrates the internal and external parameters of the cameras as well as the parameters of a compact geometric model of the human eye. An exo-camera determines a relative pose with regard to a computer monitor and endo-cameras determine the eyeball position and orientation. An endo-exo calibration and an endo-eye calibration each with an optimization step are included. A homography and a joint optimization step are also provided. A single point calibration re-establishes calibration. The system in operational mode determines a user's gaze direction to perform a computer input function.

A device allowing a user to inconspicuously send and receive wireless messages, often short text messages. The device may have an outward appearance resembling standard eyeglasses or sun glasses, and comprise a built in wireless transceiver and an optical display that enables the user to inconspicuously view incoming wireless text messages. The device allows the user to inconspicuously transmit outgoing text messages by a process in which the user simply moves his or her eyes and gazes at various display targets. The device's eye tracking systems and software track the motion and gaze of the user's eyes, and convert this gaze into message symbols and system control commands. The device then transmits the resulting messages using its transceiver. In a preferred embodiment, the device is self-contained and operates, when placed on the user's head, without the need of external battery packs or external transceivers.

An eye tracking system and method is provided giving persons with severe disabilities the ability to access a computer through eye movement. A system comprising a head tracking system, an eye tracking system, a display device, and a processor which calculates the gaze point of the user is provided. The eye tracking method comprises determining the location and orientation of the head, determining the location and orientation of the eye, calculating the location of the center of rotation of the eye, and calculating the gaze point of the eye. A method for inputting to an electronic device a character selected by a user through alternate means is provided, the method comprising placing a cursor near the character to be selected by said user, shifting the characters on a set of keys which are closest to the cursor, tracking the movement of the character to be selected with the cursor, and identifying the character to be selected by comparing the direction of movement of the cursor with the direction of movement of the characters of the set of keys which are closest to the cursor.

In one exemplary embodiment, a computer-implemented method includes the step of providing an image to a user. The image is provided with a computer display, An eye-tracking data is obtained from the user when the user views the image. The eye-tracking data is obtained with an eye-tracking system. A user attribute is determined based on the eye-tracking data. The user is enabled to access a digital resource when the user attribute is associated with a permission to access the digital resource. The user attribute can be a personhood state. The digital resource can be a web page document. An instruction can be provided to the user regarding a pattern of viewing the image. The pattern of viewing the image can include instructing the user to gaze on a specified sequence of image elements.

Systems and methods include receiving an image for presenting on a display screen of a head mounted display (HMD). The image is provided by an application. The received image is pre-distorted to enable optics provided in a HMD to render the image. An alignment offset is identified for an eye of a user wearing the HMD by determining a position of the eye relative to an optical axis of at least one lens of the optics of the HMD. The pre-distorted image provided by the application is adjusted to define a corrected pre-distorted image that accounts for the alignment offset. The corrected pre-distorted image is forwarded to the display screen of the HMD for rendering, such that the image presented through the optics of the HMD removes aberrations caused by the alignment offset.

A device allowing a user to inconspicuously send and receive wireless messages, often short text messages, and transmit still images and / or video. The device may have an outward appearance resembling standard eyeglasses or sun glasses, and comprise a built in wireless transceiver, an optical display that enables the user to inconspicuously view incoming wireless text or e-mail messages, and an outwardly-facing image / video capturing device. The device allows the user to inconspicuously transmit outgoing messages, including still images and videos by a process in which the user simply moves his or her eyes and gazes at various display targets. The device's eye tracking systems and software track the motion and gaze of the user's eyes, and convert this gaze into message symbols and system control commands. The device is self-contained and operates, when placed on the user's head, without the need for external battery packs.

A Chinese text entry system with eye-tracking technique can be used for computer input of Chinese characters. The system is comprised of two main components: the Chinese pinyin software and the eye-tracking system. Chinese characters corresponding to pinyin input are selected from a list of candidate characters by selecting the proper character through eye-tracking identification and confirming the selection by pressing a readily accessible confirmation key. The Chinese pinyin software implements pinyin input at both the character and word level, choosing from multiple character or word homonyms as pinyin is entered. The system uses eye-tracking technology that is only used to identify the correct Chinese character, with the character selection and entry occurring when the confirmation key is pressed.

A device allowing a user to inconspicuously send and receive wireless messages, often short text messages, including the capability to capture and transmit still images and / or video. The device may have an outward appearance resembling standard eyeglasses or sun glasses, and comprise a built in wireless transceiver, an optical display that enables the user to inconspicuously view incoming wireless text or e-mail messages, and an outwardly-facing image / video capturing device. The device allows the user to inconspicuously transmit outgoing messages, including still images and videos in one embodiment, by a process in which the user simply moves his or her eyes and gazes at various display targets. The device's eye tracking systems and software track the motion and gaze of the user's eyes, and convert this gaze into message symbols and system control commands. The device is self-contained and operates, when placed on the user's head, without the need for external battery packs or external transceivers.

A system, apparatus, method, and machine readable medium are described for performing eye tracking during authentication. For example, one embodiment of a method comprises: receiving a request to authenticate a user; presenting one or more screen layouts to the user; capturing a sequence of images which include the user's eyes as the one or more screen layouts are displayed; and (a) performing eye movement detection across the sequence of images to identify a correlation between motion of the user's eyes as the one or more screen layouts are presented and an expected motion of the user's eyes as the one or more screen layouts are presented and / or (b) measuring the eye's pupil size to identify a correlation between the effective light intensity of the screen and its effect on the user's eye pupil size.

An eye tracking system includes a transparent lens, at least one light source, and a plurality of light detectors. The transparent lens is adapted for disposal adjacent an eye. The at least one light source is disposed within the transparent lens and is configured to emit light toward the eye. The at least one light source is transparent to visible light. The plurality of light detectors is disposed within the transparent lens and is configured to receive light that is emitted from the at least one light source and is reflected off of the eye. Each of the light detectors is transparent to visible light and is configured, upon receipt of light that is reflected off of the eye, to supply an output signal.

Head-mounted display with an eye-tracking system and including a light-transmitting substrate (20) having two major surfaces and edges, optical means for coupling light into said substrate (20) by total internal reflection, partially-reflecting surfaces (22a-22c) carried by the substrate (20) that are not parallel with the major surfaces of the substrate (20), a near-infrared light source (78) and a display source (92) projecting within the photopic spectrum, wherein light from the light source (78) and light from the display source (92) are coupled into the substrate (20) by total internal reflection.

Systems, devices, and methods for proximity-based eye tracking are described. A proximity sensor positioned near the eye monitors the distance to the eye, which varies depending on the position of the corneal bulge. The corneal bulge protrudes outward from the surface of the eye and so, all other things being equal, a static proximity sensor detects a shorter distance to the eye when the cornea is directed towards the proximity sensor and a longer distance to the eye when the cornea is directed away from the proximity sensor. Optical proximity sensors that operate with infrared light are used as a non-limiting example of proximity sensors. Multiple proximity sensors may be used and processed simultaneously in order to provide a more accurate / precise determination of the gaze direction of the user. Implementations in which proximity-based eye trackers are incorporated into wearable heads-up displays are described.

Automatic calibration of an eye tracking system involves capturing a plurality of eye measurements, wherein each said eye measurement relates to a corresponding eye gaze position of a human eye; determining a set of statistics data from said plurality of eye gaze measurements; comparing said set of statistics of said eye gaze measurements with a set of statistics relating to a plurality of pre-measured eye gaze positions of at least one person; and as a result of said comparison, determining a calibration correction factor which, when applied to said statistics of said eye gaze measurement, give an optimum match between said statistics of eye gaze measurement and said statistics of predetermined eye gaze positions.

An eye tracking system employs a first line camera that is configured to track horizontal eye motion and a second line camera that is configured to track vertical eye motion. Output signals from the two line cameras are applied to a processor which identifies and tracks eye motion, using a correlation or edge detection algorithm on boundaries between the sclera, iris and pupil. The system includes multiple controlled light sources and the horizontal and vertical line cameras are configured to track eye motion in response to light stimulus provided by the light sources according to a programmed algorithm. Eye motion for an individual is collected and compared to a model in order to obtain a measure of fitness for the individual. The device may also be used to derive inputs to a computer system based on eye motion or gaze direction.

Systems and methods described relate to a user to providing input to a computing device using eye tracking from a mobile position. A scene camera is mounted to the user so that the system collects image information related to where the user is looking. An indication is provided on a monitor of the computing device, or other field of view, to signify the presence and location of an identifying region of the monitor or field of view. An eye camera mounted to the user collects image information of the user's eye relating to a direction of gaze of the eye. When the direction of gaze of the user's tracked eye intersects the identifying region of the monitor or field of view, suitable eye tracking methods for controlling a computing device may be used to send instructions to the computing device.

A personal computer system includes a visual display, an imaging device adapted to provide eye-tracking data by imaging the face of a viewer of the visual display, and an input device for accepting eye-tracking control data and other input data. The imaging device is switchable between at least an active mode, a ready mode and an idle mode, and the switching time from the idle mode to the active mode is longer than the switching time from the ready mode to the active mode. The eye-tracking data provided in the ready mode may include eye position but not eye orientation. The system may include a dedicated input device for forcing the imaging device into active mode by directly triggering an interrupt; alternatively, the dedicated input device forces it permanently into idle mode.

A system for tracking eye location is disclosed. Systems in accordance with the present invention include a scanner for sweeping a first optical signal across the surface of an eye, a detector for detecting a second optical signal reflected from the eye, and a detection circuit for determining a maximum intensity in the second optical signal. In operation, the scanner sweeps the first optical signal over the surface of the eye while the detection circuitry determines a plurality of intensity maxima in the second optical signal. The time between the intensity maxima during the sweep is indicative of the location of the cornea within the eye surface.

An eye tracking system determines the true gazing direction of operator of medical device relative to a monitor, while passing radiations through the body of the patient (4). An evaluation device evaluates the determined gazing direction of the operator (10). The activation or deactivation of a pedal or switch (3) is controlled automatically corresponding to the evaluation device output. An independent claim is included for the method of automatic control radiation source.

System and method for automatic control of processes or application, such as the activation or deactivation of a radiation source for medical purposes. The system comprises an operator tracking system arranged to determine the gesture / posture of a user, an evaluation device arranged to evaluate the determined gesture / posture, and an enabling device arranged to enable and disable the radiation source in response to an output of the evaluation device. The operator tracking system may use a gazing direction analysis that may be based on the output of an eye tracking system, or an emitter-receiver arrangement for a directed signal.

A method of tracking an expected location of a head in a computerized headtracking environment having a delayed processing requirement for locating a current head position, the method comprising the step of: utilizing previously tracked positions to estimate a likely future tracked position; outputting the likely future tracked position as the expected location of the head. Kalman filtering of the previously tracked positions can be utilized in estimating the likely future tracked position.

In one exemplary embodiment, a computer-implemented method includes the step of providing an image to a user. The image is provided with a computer display. An eye-tracking data is obtained from the user when the user views the image. The eye-tracking data is obtained with an eye-tracking system. A user attribute is determined based on the eye-tracking data. The user is enabled to access a digital resource when the user attribute is associated with a permission to access the digital resource. The user attribute can be a personhood state. The digital resource can be a web page document. An instruction can be provided to the user regarding a pattern of viewing the image. The pattern of viewing the image can include instructing the user to gaze on a specified sequence of image elements.

The invention discloses a free-space head-wearing eye-tracking system. The free-space head-wearing eye-tracking system comprises a head-wearing video collection device, a unit for evaluating the binocular optic axis through stereoscopic vision and a binocular vision and fixation point evaluation unit; the head-wearing video collection device collects four ways of near-infrared eye video and one way of scene video simultaneously, and the four ways of the near-infrared eye video comprise two ways of the near-infrared eye video of the left eye of a wearer who wears the head-wearing video collection device and two ways of the near-infrared eye video of the right eye of the wearer who wears the head-wearing video collection device; coordinates of pupils of both eyes and cornea center are evaluated directly through a stereoscopic vision method, and a binocular optic axis straight line equation is calculated; a binocular visual axis straight line equation is evaluated according to an eyeball Kappa angle and the binocular optic axis straight line equation, a fixation point coordinate is calculated, the position of a fixation point in the scene video is mapped and marked, and the Kappa angle is a fixed included angle between the optic axis and the visual axis of each eyeball.

In preferred embodiments, apparatus for and method of eye tracking, including, in sequence, the steps of: viewing an entire face of a person to obtain predetermined facial features of the person to identify or not the said person; if the person is identified, retrieving a previously stored ocular profile of the person based on said predetermined facial features; using said ocular profile to track movement of an eye of said person. If the person is not identified, an ocular profile is created.

There is provided methods, systems and computer program products for identifying an interaction element from one or more interaction elements present in a user interface, comprising: receiving gaze information from an eye tracking system; determining the likelihood that an interaction element is the subject of the gaze information from the eye tracking system; and identifying an interaction element from the one or more interaction elements based on said likelihood determination.

A system for detecting and recording eye-tracking data by presenting to an observer a display image with an area in focus surrounded by blurred areas. The observer may shift the focus area within the image by head movements which are wirelessly transmitted to a receiver and used to modify the displayed image. This system solves that part of the eye-tracking problem that is most critical for measuring cognitive processes.

System and method for automatic control of processes or application, such as the activation or deactivation of a radiation source for medical purposes. The system comprises an operator tracking system arranged to determine the gesture / posture of a user, an evaluation device arranged to evaluate the determined gesture / posture, and an enabling device arranged to enable and disable the radiation source in response to an output of the evaluation device. The operator tracking system may use a gazing direction analysis that may be based on the output of an eye tracking system, or an emitter-receiver arrangement for a directed signal.

A method of tracking an expected location of a head in a computerized headtracking environment having a delayed processing requirement for locating a current head position, the method comprising the step of: utilizing previously tracked positions to estimate a likely future tracked position; outputting the likely future tracked position as the expected location of the head. Kalman filtering of the previously tracked positions can be utilized in estimating the likely future tracked position.