81 results about "Pupils size" patented technology

The invention relates to a system and method for determining human emotion by analyzing a combination of eye properties of a user including, for example, pupil size, blink properties, eye position (or gaze) properties, or other properties. The system and method may be configured to measure the emotional impact of various stimuli presented to users by analyzing, among other data, the eye properties of the users while perceiving the stimuli. Measured eye properties may be used to distinguish between positive emotional responses (e.g., pleasant or “like”), neutral emotional responses, and negative emotional responses (e.g., unpleasant or “dislike”), as well as to determine the intensity of emotional responses.

A lens system and optical devices that provide enhanced vision correction are disclosed. The lens system includes an electro-active layer that provides correction of at least one higher order aberration. The higher order correction changes dynamically based on a user of the lens system's needs, such as a change by the user's gaze distance, pupil size, or changes in tear film following blinking, among others. Optical devices are also described that use these and other lens systems to provide correction of higher order aberrations. An optical guide is also described that guides the user's line of sight to see through a lens region having a correction for a higher order aberration.

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.

The technology provides various embodiments for controlling brightness of a see-through, near-eye mixed display device based on light intensity of what the user is gazing at. The opacity of the display can be altered, such that external light is reduced if the wearer is looking at a bright object. The wearer's pupil size may be determined and used to adjust the brightness used to display images, as well as the opacity of the display. A suitable balance between opacity and brightness used to display images may be determined that allows real and virtual objects to be seen clearly, while not causing damage or discomfort to the wearer's eyes.

The OculoKinetic Device is used to test an individual to evaluate brain function including, but not limited to, identifying the presence of a traumatic brain injury or central nervous system disease which manifests itself through abnormal ocular responses to stimuli by using the high-speed tracking of an individual's eye movements (monocular or binocular, and either conjugate or disconjugate in horizontal, vertical, or torsional directions or combinations thereof), pupil size and reactivity, eyelid position, and blink parameters, and optionally along with other ocular elements, i.e., eyeball pressure, temperature, blood flow, etc. The eye movement stimulus protocol uses a target that moves in any direction of a two- or three-dimensional plane and may use a color display or geometric shapes. In addition, the stimuli can be used in conjunction with cognitive testing, balance assessment, and other non-eye tests.

Methods and systems for obtaining an ocular aberration measurement of an eye of a patient are provided. Exemplary techniques involve obtaining a first induced metric for the eye that corresponds to a first accommodation state of the eye, obtaining a second induced metric for the eye that corresponds to a second accommodation state of the eye, and determining a natural metric of the eye based on the first and second induced metrics. An induced metric may include a pupil size or a spherical aberration. Techniques can also include determining a target metric for the eye base on the natural metric, determining whether an actual metric of the eye meets the target metric, obtaining an ocular aberration measurement of the eye if the actual metric meets the target metric, and determining a treatment for the eye based on the ocular aberration measurement.

A wearable device includes a light source and a display unit. The display unit includes an image engine that controls the light source to generate image content for display, and a plurality of optical elements that direct the image content into a viewing zone. An eye monitor measures information pertaining to an eye configuration of a user wearing the wearable device, and the image content is visible to the user when the eye is aligned with respect to the viewing zone. A spatial light modulator (SLM) moves a position of the viewing zone based on the eye configuration information measured by the eye monitor. The eye monitor measures pupil size of the user, and the optical elements direct the image content into the viewing zone that is smaller in at least one dimension than twice the measured pupil size. The light source may include a micro-electro-mechanical systems (MEMS) scanning mirror.

A method for monitoring fatigue strength of driver includes shining driver eye with infrared ray to obtain multiimage of different retina image at the same time, carrying out difference processing for collected images to obtain pupil images, using kalmen filter to trace pupil in real - time to obtain pupil characteristic parameter, processing the parameter to obtain maximum value of pupil size and real - time coroclisis percentage of pupil, calculating out PERCLOS value f and using BP network sorter to judge fatigue strength of driver based on obtained value f. The monitoring device is also disclosed.

The present invention relates to an iris recognition device and method capable of improving iris recognition accuracy. To enhance iris recognition accuracy in consideration of variation in pupil size and iris region due to changes in intensity of lighting, the iris recognition device and method are configured to obtain multiple iris images having different iris sizes by capturing iris images of a person to be enrolled with a camera while adjusting brightness of lighting so that the iris size of the person to be enrolled varies from a maximum size to a minimum size, store the obtained iris images and associated iris size information for enrollment in a database interworking with the iris recognition device, and select enrolled iris images having an iris size most similar to that of an iris image captured by the camera for identification among many enrolled iris images for similarity measurement.

Systems and methods for tracking eye movement includes directing an incident light beam onto each facet of a pyramidal prism to produce a plurality of beams that form a plurality of light spots, at least two of the light spots having different diameters. The prism is translatable to effect a change in spacing of the light spots. Intensities of light reflected from the light spots is used to retain the light spots upon a pupil/iris boundary. A relative intensity of the spots indicates a change in pupil size. A second light spot positioned on a predetermined eye sector can also be used to calculate a pupil characteristic and an environmental effect on light received from the eye.

A patient immobilization device for immobilizing a patient and performing a diagnostic evaluation of such patient is comprised of a backboard, a structure configured to support the head of a patient on the backboard, and a pupil-sizing indicator positioned on a surface of the support structure to be visually accessible to a person that is visually evaluating the head and face of an immobilized patient on the backboard.

Aspheric optical lenses (e.g., intraocular lenses and contact lenses) are provided. The intraocular lens includes a body portion defining an anterior optical surface and an opposing posterior optical surface. The anterior optical surface includes a central region surrounded by a first outer region and a second outer region. The central region has a first asphericity profile. The first outer region has a second asphericity profile that is different than the first asphericity profile of the central region. The second outer region has a third asphericity profile that is different than the second asphericity profile of the first outer region. The overall asphericity profile of the optical lens provides different depths of focus for different pupil sizes. The result is an optical lens that provides increased depth of focus or pseudo-accommodation while maintaining desired optical power and performance.

The embodiment of the invention provides a terminal processing method and device, and a mobile terminal. The method comprises the steps of starting an iris detector to collect eye image information of a user when the mobile terminal is used by the user; determining whether pupil size information is in a first range or not according to the eye image information; and adjusting screen brightness of the mobile terminal to enable the pupil size information to satisfy the first range when the pupil size information is not in the first range. Pupil sizes can represent user eye states, the screen brightness is automatically adjusted through the pupil sizes, and the brightness adjustment accuracy is improved.

A fast algorithm is presented which allows for substantially simultaneous acquisition, analysis, and display of a wavefront centroid image, referred to as online aberrometry. A method embodiment involves determination of an average, or most frequently occurring, wavefront aberration over a selected time interval, e.g., 20 sec. Online pupil diameter measurement allows analysis of wavefront aberration as a function of changing pupil size. A wavefront measuring apparatus is disclosed that supports online aberrometry.

A head mounted display apparatus and a backlight adjustment method thereof are disclosed. The head mounted display apparatus comprises a display module, a backlight module, an application processor, an eye image capture apparatus, an infrared (IR) light emitting diode (LED) and an application specific integrated circuit (ASIC). The backlight module provides a backlight to the display module. The eye image capture apparatus captures an eye image. The IR LED provides an auxiliary light source to the eye image capture apparatus. The ASIC calculates a current pupil size according to the eye image. The application processor adjusts the backlight intensity of the backlight module according to the current pupil size in an adjustment mode.

A light guide device may be incorporated into a virtual image display apparatus, and functionally includes a light-incident part for entrance of picture lights, a light guide part that guides the picture lights via the light-incident part, and a light-exiting part that outputs the picture lights from the light guide part to a position of an eye. In the light guide device, light guide that enables non-diffraction virtual image formation is performed with respect to lateral first directions and a pupil size is enlarged by first and second diffraction optical elements with respect to longitudinal second directions.

The embodiment of the invention discloses a method for controlling the luminance of a terminal screen and a terminal. The method includes the steps that after the terminal determines that the luminance value of the screen of the terminal is a first screen luminance value, the information of eyeballs of eyes in a preset range is detected, and the size of pupils of the eyes is determined according to the detected information of the eyeballs of the eyes; then after the terminal determines that the size of the pupils of the eyes is larger than or equal to a pupil size threshold value, the luminance value of the terminal screen is set to be a second screen luminance value. According to the method and the terminal, the terminal obtains the size of the pupils of the eyes by detecting the information of the eyeballs of the eyes, then whether the terminal screen is watched with the eyes or not is determined, and under the condition that the screen is not watched with the eyes, the luminance of the terminal screen is reduced with the method of setting the luminance value of the terminal screen into the second screen luminance value, so that the power consumption of the terminal screen is effectively reduced, and the running time of the terminal is prolonged.

Techniques for adaptive brightness control of a display are described. A apparatus may comprise a display and a display control module communicatively coupled to the display. The display control module may be arranged to modify brightness levels for the display based on ambient light level measurements and changes in pupil size of a human eye. Other embodiments are described and claimed.

The invention provides a method of adjusting parameters of a virtual-reality device and virtual-reality devices, which are suitable for use in the technical field of virtual reality. The method includes: acquiring current human body information of a user, wherein the human body information includes at least one item of the following items: a heart rate, skin resistance, body temperature, blood pressure, a pupil size and a facial expression; judging current physiological status of the user according to the human body information; adjusting the parameters of the virtual-reality device according to the current human body information of the user if the current physiological status of the user meets a first preset condition, wherein the parameters of the virtual-reality device include at least one item of the following item: ray light and shade of a played video, a sound volume of the played video, a lens swing speed and a video scale. Through the method, automatically adjusting the parameters of the virtual-reality device according to the human body information of the user can be realized, and the problem of poor user experience is solved.

A system for generating a beam for retinal reflection detection includes a beam processor positioned to receive an illumination beam having a first spot size from a light source. The beam processor can alter the illumination beam to form a beam having a second spot size. Focusing optics focus this altered beam onto an eye, causing a spot to be formed on the retina. A detector receives reflected radiation from the retina passed through the pupil, and generates data indicative of a spatial extent of the eye pupil and an intensity map of the reflected radiation. A software package can determine from the data a pupil size and an intensity level in the intensity map. A controller in communication with the software signals the beam processor to vary the second spot size to optimize an accuracy of the determined pupil size and the intensity level.

Eye movements and/or physiological characteristics of a user viewing a subject are detected and quantified to produce data to determine one or more details that is or was observable in the scene or image of which the user may or may not be consciously aware. Eye movement data includes the number of times a user looks at each area of a subject (“fixation number”), the length or duration of the fixation (“fixation duration value”), the number of times a user returns to look at a particular area (“fixation repeats”), and additionally any changes to pupil size based on dilation/constriction (“pupil size”). Physiological characteristic data includes heart rate, pulse or skin conductance. Advantageously, the system and methods may be used for a variety of purposes including evaluation improvement and training.

A display system for presenting visual information to a user includes a fast scan mirror, a slow scan mirror, and anamorphic relay optics positioned optically between the fast scan mirror and slow scan mirror. The fast scan mirror has a fast scan arc in a scan direction of a display light provided by a light source. The slow scan mirror has a slow scan arc in a cross-scan direction of the display light that is perpendicular to the scan direction. The anamorphic relay optics are configured to magnify the display light in the cross-scan direction.

The embodiment of the invention relates to the technical field of communication, and discloses an unlocking detection method of a touch screen terminal, and the touch screen terminal. The method comprises the following steps that: detecting an unlocking operation which happens on the touch screen of the touch screen terminal, and collecting user feature information, wherein the user feature information comprises human body feature parameters and vital sign parameters; when the user feature information is matched with authorized feature information, through an eye detection device built in thetouch screen terminal, detecting the eye focus point of a user, and collecting the eye image of the user; judging whether the eye focus point of the user is on the touch screen of the touch screen terminal or not; if the eye focus point of the user is on the touch screen of the touch screen terminal, analyzing the eye image of the user to obtain the pupil size of the user; judging whether the pupil size of the user is adaptive to a preset pupil size range or not; and if the pupil size of the user is adaptive to the preset pupil size range, executing an unlocking operation for the touch screenterminal. When the embodiment of the invention is implemented, illegal unlocking and unlocking under the nonvoluntary state of the user are avoided, the information and property loss of the user can be lowered. Furthermore, the mistaken unlocking operation of the user is avoided so as to improve user experience feeling.

The invention discloses an eye fatigue prompting method and user equipment. The method comprises steps: a camera arranged in front of a display screen is used for acquiring an eye area image of a user; the pupil size is calculated on the eye area image, and a pupil size value is acquired; the eye closing degree corresponding to the pupil size value is determined; and whether the eye closing degree exceeds a preset threshold is judged, and if yes, eye fatigue early warning prompting is carried out on the user. When the embodiment of the invention is executed, eye fatigue prompting can be effectively carried out on the user, and various diseases caused by eye fatigue can be prevented.

A protective enclosure for a thermal imager having a window and protective grid. The protective grid is designed in relation to the lens of the thermal imaging device such that the grid pattern geometry and size accommodate the thermal imaging device's pupil size.