50 results about "Pupil size" patented technology

The invention belongs to the field of visual training, and particularly relates to a multispectral dynamic visual function training system and method. The multispectral dynamic visual function training system comprises an image acquisition module, an intelligent analysis module, a control module, a training execution module and a multispectral light source module, the image acquisition module is arranged at a position corresponding to an eye and is used for acquiring image information near eyeballs of a user, personal information of the user and a vision diagnosis result in real time, and the image information comprises eyeball movement tracks, pupil sizes and forms, cornea edge contours and eye white elastic states; and the intelligent analysis module combines the image information and the acquisition time of the image information. According to the scheme, through collection, analysis, regulation and control of a closed loop, the problems that in the prior art, a real-time analysis mechanism based on eyeball images is lacked, the adaptability of a training scheme and eye dynamic characteristics is weak, and precise regulation and control of functions such as light nutrition supplement and choroid stimulation cannot be achieved are solved; and precise training is also realized, and the effects of prevention and protection, cooperative improvement, compliance improvement and the like are achieved.

The embodiment of the invention discloses a cognitive anomaly detection method and device based on pupils and a medium, relates to the technical field of artificial intelligence, and is used for solving the problem that current cognitive anomaly detection is low in efficiency and poor in accuracy. The method comprises the steps of determining detection task contents corresponding to different detection task types based on identity information of a current user and current cognitive screening information; the detection task content is transmitted to the display terminal to be displayed so as to receive eye movement flow data collected by an eye tracker in the display process of the detection task content; calling to-be-analyzed eye movement flow data corresponding to each detection task type, so as to extract to-be-detected features from the corresponding to-be-analyzed eye movement flow data based on a detection strategy corresponding to each detection task type; and inputting the to-be-detected features into the pre-training discrimination model of the corresponding type to obtain a cognitive anomaly detection result of the current user.

The invention relates to the technical field of artificial intelligence, and discloses a digital human driving method based on artificial intelligence, comprising the following steps: step 1, acquiring a voice signal, a facial electromyographic signal, a pupil size signal and a hand motion signal of a student through a wearable device, the wearable device comprising a helmet built-in sensor and a hand motion capture device; step 2, converting the voice signal in the step 1 into a fundamental frequency feature vector, converting the facial electromyographic signal into a 28-dimensional muscle activation degree vector, converting the pupil size signal into a diameter change rate scalar, and converting the hand motion signal into a six-degree-of-freedom pose matrix; according to the method, the multi-mode behavior recognition engine is adopted to fuse micro expression analysis, voice stress detection and skeleton motion capture technologies, the technical effect of recognizing the tiny abnormal reaction of the student in real time is achieved, and compared with a visual behavior recognition scheme based on a preset script in the prior art, the defects that deviation correction response is delayed and the safety knowledge memory effect is poor are overcome.

The invention provides an endoscope sharing control method based on a human body signal and a game theory, and belongs to the field of medical instruments, and the endoscope sharing control method comprises the following steps: obtaining eyeball movement data; based on the eyeball movement data, determining eye movement control position data used for representing a manual control intention through gaze thermodynamic diagram analysis; based on the eyeball movement data, through quantitative analysis of sight, eye opening degree and pupil size, obtaining reference indexes used for representing intention integrating degree and manual control burden; machine control position data used for representing the expected moving distance of the endoscope are obtained by analyzing the position relation between a target object and the endoscope in an endoscope image, and the endoscope image is collected in real time through the endoscope; based on the machine control position data, the eye movement control position data and the reference index, determining shared control position data through a cooperative game strategy; movement of the endoscope is controlled based on the shared control position data.

A vision screening device displays visual stimuli and captures image(s) of the eye while the visual stimuli is changing over a period of time. The vision screening device uses the images to determine and monitor refractive error, ambient light level(s), pupil size, and gaze angle as the visual stimuli changes over the time period. Based on the refractive error, a determination of hyperopia and / or presbyopia is made. Based on the gaze angle and / or the pupil size, a confidence metric is determined. Based on the confidence metric and / or the determination, a recommendation for the patient is generated and displayed.

A directional illuminator for a display apparatus includes a switchable diffuser for tuning a divergence of a light beam illuminating a display panel of the display apparatus. The tunable divergence of the illuminating light beam translates into a tunable exit pupil size at the eyebox of the display apparatus, which may be matched to a pupil size of a user's eye, thus providing a configurable illumination of the eye pupil. A tiltable reflector in an optical path of the illuminating light beam may be used to shift the location of the exit pupil at the eyebox of the display apparatus.

A system and method for combining short-wave infrared (SWIR) imaging with image processing algorithms to measure pupil size dynamics in closed eye conditions, either in response to an external stimulus (such as light-induced PLR) or occurring spontaneously during sleep or anesthesia. The system, with deep learning-based analysis, can further estimate gaze direction during eye movements and achieve robust pupillometry. The system has at least one electromagnetic radiation source for radiating electromagnetic energy in a spectral range of 700 nm to 2,000 nm, and an imaging device for detecting electromagnetic energy and sending image data to a processor which performs algorithmic and deep- learning based analysis of image data to continuously track changes in pupil diameter and gaze direction over time.

The present disclosure relates to a method for displaying an image having a specific depth of field. The method comprises the steps of: obtaining information data relating to a focal length adapted to a user looking at the display; determining the pupil size of the user; estimating a depth of field of both eyes of the user based on the focal length and the pupil size; and rendering an image to be displayed on the display based on the depth of field. Further, the present disclosure relates to a system, a head mounted display, and a non-transitory computer readable medium.

The utility model discloses a medical multifunctional ruler, which belongs to the technical field of surgical clinical props and comprises a ruler body, and a length scale, a light-proof medicine allowance scale, a pupil size contrast scale, a thirst scale and a pain scale are carved on the ruler body. Functional components of a plurality of small tools are integrated on one ruler, the effects of diagnosing, treating and monitoring surgical diseases and symptoms can be achieved through the ruler, a nurse can conveniently and rapidly prize a cover of a liquid bottle through the arranged bottle opener, and the liquid bottle is convenient to use. The body condition of a patient or the implementation state of medical props is detected and observed through the length scale, the light-proof medicine allowance scale, the pupil size contrast scale, the thirst scale and the pain scale which are carved on the ruler, various tools needed in clinical work of nurses are integrated through the functional ruler, and the functional ruler is short, light, convenient to carry and high in practicability. And convenience is provided for clinical work of nurses.

A new family of intraocular lenses that exhibit an extended depth of focus or a tailored multifocality where the lenses are designed by the combination of a base lens topology and additional refractive power range described along a spiral-like grid. The variety of parameters confer a great versatility to the lens design, which allows the achievement of the best suitable features to attend to a wide range of visual demands in performing different activities. It is possible to set the parameters to specify apt-focal lenses that account for optical performance changes due to pupil aperture variations, as well as to counter positive dysphotopic effects.

The invention relates to a method for interaction between a user (1) and an AI model (2), wherein the AI ​​model (2) artificially generates acoustic content (3) and / or visual content (4) and causes the output of the acoustic content (3) via acoustic output means (5) and / or the output of the visual content (4) via visual output means (6), wherein the user (1) consumes the artificially generated content (3, 4), wherein during and / or after the output of the artificially generated content (3, 4) the pupil size of at least one eye (7) of the user (1) is detected, and wherein the acoustic content (3) and / or visual content (4) is varied by the AI ​​model (2) depending on the pupil size.

The invention is a quality assurance procedure using human resources to improve the effectiveness of the quality management system where the viewing direction (1) of a worker representing the human resource at a given place of work in a situation facing a monitor (2) of a given phase of a manufacturing process is displayed. The worker's presence is perceived mechanically by cameras and / or lidars (3) on the basis of methods known per se, the viewing direction (1) of the worker's eyes (4) and the pupil size of the eyes (4) are determined and at given intervals time stamps are generated and stored containing this information. The system (7) includes at least one server (5) connected informatically to the monitor (2). The screen of the monitor (2) is devided into parts containing smaller blocks (6) according to a predefined pattern. Worker parameter sets are assigned to each block (6), where the worker parameter sets include at least the viewing direction (1) of the eyes (4), their time duration related to a given block (6) and pupil size. Expectation parameter sets are also assigned to each block (6), which include at least parameters corresponding to the worker parameter sets. The worker parameter sets and the expectation parameter sets related to each block (6) are compared one by block (6) by an application running on at least one server (5) with a given set of criteria, which consists the maximum permitted deviation of the worker and the expectation parameter sets and in case of exceeding the maximum permitted deviation an intervention is carried out by block (6) on the monitor (2) and in the system (7).

The present invention discloses a human-machine collaborative video summarization method based on pupil size. Based on the theory that there is a close connection between the spontaneous non-verbal reactions of viewers and their real-time attention changes when watching videos, a perception-driven video dataset is made by utilizing the characteristics that the pupillary light response can be used to indicate the more attractive parts in the video and the data is easy to obtain, providing a basis for the video summarization model to learn the real-time and dynamic attention mechanism of viewers. The present invention uses a human-machine collaborative video summarization framework composed of an encoder-decoder module, an attention mechanism module, and a key frame selection module, which can supervisedly learn the relationship between video features and the attention of viewers to the video, and finally obtain an attention-driven video summarization model that can automatically generate a summary according to the original video.

Example embodiments relate to a computer-implemented method for generating an opto-mechanical model of a camera-type eye from ocular biometry parameters that define the anatomy of the camera-type eye; wherein the ocular biometry parameters comprise at least a pupil size (224) and an iris thickness (223). The computer- implemented method comprises obtaining a predetermined iris shape (220) and a predetermined ciliary body shape (230); anchoring (201) one or more data points (221) of an outer edge of the iris shape (220) to one or more reference points of the posterior corneal surface; transforming (202) the iris shape (220) as to respect the pupil size (224) and the iris thickness (223); anchoring (203) a first portion of the outer edge (250) of the ciliary body shape to a portion of an outer edge (225) of the iris shape; transforming (204) the ciliary body shape (230) such that a second portion of an outer edge (231) of the ciliary body shape coincides with a portion of the inner scleral surface (212); and generating (205) one or more polygons (261, 262) indicative for respective zonular fibres, wherein the respective one or more polygons are defined by at least two data points located on the crystalline lens surface (240) and at least two data points located on an inner edge (232) of the ciliary body shape.

An eye-tracking system includes processing circuitry configured to acquire a first eye image captured during a first time period, including a user's pupil; determine a first pupil size based on the first eye image; acquire a second eye image captured during a second time period; determine a second pupil size based on the second eye image; acquire scene information of the scene in which the pupil is exposed, including a first brightness level, a second brightness level, and spatial information of a second region within the second time period; determine a pupil size change between the first and second pupil sizes, indicating that the user is looking at the second region; and determine reference gaze data of the user during the second time period if the pupil size change is greater than a pupil size change threshold. The invention also relates to a head-mounted device, method, computer program, and carrier.

A light based pupil size measuring system includes at least one semiconductor light source including a cavity and configured to emit light onto an eye target. The system further includes at least one light sensor for converting a self-mixing interferometric (SMI) signal of the light backscattered from the eye target into the cavity into an electrical current or voltage and includes at least one processor configured to determine ocular pupillary movement of the eye target based on the converted SMI signal from the at least one light sensor.

This invention discloses a dual-layer liquid crystal display device and method for simulating pupil size, belonging to the field of human simulation displays. It comprises an integrated module coaxially stacked from an upper liquid crystal panel, a lower liquid crystal panel, a background film, a backlight panel, a fixing plate, and a main control board. The module is embedded and coplanar with the simulated human eyeball, and is fully sealed and dustproof. The upper liquid crystal panel features coaxial circular and annular light-shielding patterns, while the lower liquid crystal panel features an annular light-shielding pattern; all three are sized to be compatible. The main control board independently drives the two liquid crystal panels, achieving seamless switching between three clinical pupil states (dilated, moderate, and constricted) through the superposition of the light-shielding areas. This invention eliminates display gaps, resulting in smooth and natural pupil edges. It boasts strong structural adaptability and reliable control, significantly enhancing the realism and professionalism of emergency training.

A control device according to an aspect of the present disclosure includes: at least one memory configured to store instructions; and at least one processor configured to execute the instructions to: acquire an input image including an eye region that is a region of an eye part; estimate illuminance of the eye part from the acquired input image; and determine a light amount of illumination of visible light with which the eye part is irradiated in such a way that a pupil size of the eye part satisfies a size condition based on an illuminance size relationship that is a relationship between the illuminance and the pupil size.

The invention is related to an eye tracking system for determining reference gaze data of a user in a scene exposing a pupil of the user. The eye tracking system comprising processing circuitry configured to obtain a first eye image comprising the pupil of the user, the first eye image being captured during a first time period; determine, based on the first eye image, a first pupil size; obtain a second eye image comprising the pupil of the user, the second eye image being captured during a second time period; determine, based on the second eye image, a second pupil size; obtain scene information of the scene exposing the pupil of the user, the scene information comprising at least the first luminance level, the second luminance level and spatial information of the second region during the second time period; determine a pupil size change between the first pupil size and the second pupil size, the pupil size change indicating that the user is looking at the second region; determine reference gaze data of the user during the second time period, if the pupil size change is larger than a pupil size change threshold. The invention further relates to a head-mounted device, a method, a computer program and a carrier.

The utility model discloses a multipurpose tool for examining nerves, and relates to the technical field of medical instruments, the multipurpose tool comprises a percussion hammer, the percussion hammer comprises a hammer body and a handle, the handle is provided with a plurality of measuring holes with different diameters, the measuring holes are used for measuring the pupil size, the hammer head end of the hammer body is provided with a light-emitting lamp, and the light-emitting lamp is connected with the percussion hammer. The light-emitting lamp is used for irradiating pupils, a telescopic touch doctor blade is arranged at the hammer tail end of the hammer body, and the touch doctor blade is used for scraping the skin. The device has multiple inspection functions of nerve reflex inspection, pupil size inspection, pupil light reflex inspection and skin touch inspection, so that the number of inspection tools carried by medical staff can be reduced, and routine inspection of the medical staff and use of the inspection tools are greatly facilitated.

The invention discloses an attention detection system and method based on pupil size fluctuation characteristics, and relates to the technical field of attention detection.The key points of the technical scheme are that pupil diameter data of a detected person in a resting state are collected through an eye tracker; processing the pupil diameter data, deleting blink data points, and supplementing data missing values by adopting linear interpolation to obtain interpolated pupil diameter data; converting the pupil diameter data after interpolation, converting a time domain signal into a frequency domain signal through a Fourier transform algorithm, and calculating to obtain a power spectrum; performing aperiodic index fitting on the power spectrum to generate a spectrum slope; and evaluating the attention level of the detected person according to the spectrum slope. High-precision pupil data are collected through the non-invasive glasses type eye tracker, convenient, objective and high-sensitivity attention assessment is achieved in combination with spectrum slope analysis, and an innovative solution is provided for clinical diagnosis, educational intervention and occupational health management.

The invention relates to the field of pupil monitoring analysis, in particular to a pupil monitoring analysis method, system and device. The elastic lens frame is matched with the upper supporting body and the lower supporting body to effectively open eyelids, blinking or eyelid shielding interference is avoided, it is ensured that the camera is always aligned with the pupil center, the cutting edge design on the inner side of the standard circular ring provides a high-contrast circular contour, millimeter-level precision measurement of the actual pupil size is achieved in combination with the proportionality coefficient, and the measurement precision is high. Based on a dual geometric model of a maximum inscribed circle and a minimum circumscribed circle, in combination with a dynamic threshold algorithm, the irregularity degree of the pupil shape is quantified, the dynamic response of pupils to light reflection is tracked in real time, and pixel points of all first abnormal parts, second abnormal parts and third abnormal parts are automatically output through an abnormal pixel set and included angle marks. Through highlight display of a visual interface, doctors are assisted in diagnosis; the problem that in the current pupil monitoring field, high-precision imaging, portable design and dynamic analysis functions are difficult to integrate effectively is solved.

The application provides a pupil measuring device, which comprises a flashlight body, a plurality of annular members with gradually decreasing inner diameters are sequentially arranged inwardly on the inner wall of the inner cavity of the flashlight body, a plurality of through holes are arranged on the wall of the annular members, a sliding block is connected with a first vertical rod, a first groove for the sliding of the first vertical rod is arranged on the flashlight body, a second vertical rod is upwardly inserted into a blind hole at the lower end of the first vertical rod, a spring in a compressed state is arranged in the blind hole and connected with the upper end of the second vertical rod, a third vertical rod is vertically arranged on the slope, and a light source is arranged on the third vertical rod; when the sliding block slides leftward and rightward, the light source moves back and forth along the parallel direction of the slope, so as to correspond to the inlets of the through holes on different annular members. The flashlight type is convenient for medical staff to use, a plurality of annular members are arranged, the light source corresponds to the inlets of different annular members by adjusting the sliding block, the light source is emitted from the outlet of the annular member to form a ring shape, and the size of the pupil of a patient can be determined when the ring-shaped light coincides with the pupil of the patient.

The application relates to the technical field of medical detection equipment, and discloses an automatic pupil size recognition and determination device, which comprises a shell, a control unit and a power supply unit arranged in the shell; the shell comprises a detection head and a holding part connected with the detection head, the detection head is internally provided with an AI vision recognition module, a self-adaptive light compensation module, a distance calibration module and a main control circuit board; a light transmission window is arranged on the front end surface of the detection head; the AI vision recognition module comprises a CMOS image sensor and an AI processing chip electrically connected with the CMOS image sensor; the CMOS image sensor comprises a lens, the lens is directly opposite the central region of the light transmission window and is used for collecting a pupil image; the AI processing chip is internally programmed with a pupil feature recognition model and is used for automatically extracting pupil contour and edge features and outputting quantitative data. The application integrates AI vision, self-adaptive infrared light compensation and laser distance calibration, eliminates light interference and perspective deviation, automatically measures and calculates the real diameter of the pupil, and avoids artificial subjective errors.

The application provides a digital human model generation method and system, a computer and a storage medium, the method comprises the following steps: acquiring the position of a VR head-mounted device; determining the area where the user is located according to the position of the VR head-mounted device; judging whether the area where the user is located enters a demonstration area; if yes, acquiring a picture collected by the VR head-mounted device; judging whether the picture collected by the VR head-mounted device is matched with a target area; if yes, generating a digital human model corresponding to the target area and displaying the digital human model in the VR head-mounted device; controlling the VR head-mounted device to recognize the eyeballs of the user in real time, determining the pupil position and the pupil size, and interacting with the digital human model according to the pupil position and the pupil size, so that the digital human can provide personalized services and improve the user satisfaction.

The invention provides an optical system of handheld OCT equipment and the handheld OCT equipment. The optical system of the handheld OCT equipment comprises a galvanometer, a light beam adjusting set and a light beam focusing set which are sequentially arranged from a light source to human eyes. The focal length ratio of the focal length of the light beam adjusting group to the focal length of the light beam focusing group meets the following relational expression: 1lt; a focal length ratio lt; 1.2; the galvanometer is used for scanning the light rays emitted by the light source to the light beam adjusting group so as to generate light beams; the light beam adjusting group is used for adjusting the propagation direction and divergence of the light beam emitted by the galvanometer; and the light beam focusing group is used for focusing the light beam adjusted by the light beam adjusting group to the human eye, so that the light beam is imaged at the retina of the human eye. In the mode, by optimizing the design of the optical system, the handheld OCT equipment can better adapt to the eye axis length and the pupil size of the infant, and the fundus imaging quality of ophthalmic examination of 0-3-year-old infants is improved.

An information processing system is provided. The information processing system includes first and second information processors. The first information processor obtains a first moving image including a face and detecting an eye from two or more first images among the first moving image. The first information processor detects a pupil from the eye detected from the first image, calculating its size, and performing learning using a change over time in the size of the pupil. The second information processor obtains a second moving image including a face and detecting an eye from two or more second images among the second moving image. The second information processor detects a pupil from the eye detected from the second image, calculating its size, and performing inference on the change over time in the size of the pupil on the basis of the result of the learning performed by the first information processor.

The scheme belongs to the field of vision training, and specifically relates to a multispectral dynamic visual function training system and method. The multispectral dynamic visual function training system comprises an image acquisition module, an intelligent analysis module, a control module, a training execution module and a multispectral light source module; the image acquisition module is arranged at a corresponding position of the eye and is used for acquiring image information near the eyeball of a user, personal information of the user and a vision diagnosis result in real time, the image information comprising an eyeball movement trajectory, pupil size and morphology, corneal edge contour and eye white elasticity state; the intelligent analysis module is combined with the image information and the acquisition time of the image information. Through acquisition analysis regulation and control of a closed loop, the scheme solves the problem that the prior art lacks a real-time analysis mechanism based on eyeball images, the adaptability of a training scheme to dynamic characteristics of the eye is weak, and precise regulation and control of functions such as light nutrition supplementation and choroid stimulation cannot be achieved, and also achieves the effects of precise training, prevention and protection, synergistic improvement and improved compliance.

The utility model relates to a simulation eye based on a miniature display screen, the simulation eye comprises at least one pair of curved surface bodies similar to the physical form of the eye and an eye simulation unit used for data processing and simulation picture generation, and each curved surface body comprises a display screen provided with a screen display control unit; and the eye simulation unit is connected with the screen display control unit, so that the display screen can display a dynamic simulation effect of eyes. The simulation eye based on the micro display screen disclosed by the utility model is good in simulation effect, and not only can simulate the physical form of the appearance of the eye, such as transparent cornea and eye bulge characteristics. And the dynamic effect of eyes can be simulated, such as displaying iris style color and pupil size, simulating eyeball movement change and the like.