45 results about "Pupil diameter" patented technology

The invention relates to the field of intelligent perception, and mainly relates to a user interaction intention perception method and system based on intelligent glasses, and the method comprises the steps: obtaining the abnormal degree of an eye jump drop point according to the main eye jump and the subsequent correction eye jump times after detecting that the current eye jump drop point of a user enters an interaction region of an interactive object; acquiring a pupil diameter change sequence after the main eye jump, and acquiring a pupil transient response score based on the pupil diameter change sequence; after a certain time from the falling point time of the main eye jump, acquiring a real-time double-variable contour ellipse area based on information of a plurality of latest fixation points, and acquiring a fixation stability score based on the real-time double-variable contour ellipse area; obtaining a real-time gaze residence time according to the falling point time of the main eye jump, and obtaining a residence time evaluation score based on the real-time gaze residence time; fusing the abnormal degree, the pupil instantaneous response score, the stability score and the evaluation score to obtain a dynamic interaction intention score of the user, and determining the interaction intention of the user based on the intention score. The perception accuracy of the user interaction intention is improved.

The embodiment of the invention provides an emotion detection method based on a multi-mode electroencephalogram eye movement signal. According to the method, a dual-path electroencephalogram modal encoder is used for determining time sequence characteristics of an electroencephalogram in a time domain path, determining frequency domain characteristics of an amplitude spectrum of the electroencephalogram in a frequency domain path, and obtaining dual-path time domain and frequency domain fused electroencephalogram characteristics based on the time sequence characteristics and the frequency domain characteristics; the dual-path eye movement modal encoder is used for determining pupil features of the eye movement data in the pupil diameter path, determining eye movement fixation features of the eye movement data in the fixation point path, and obtaining fused eye movement features based on the pupil features and the eye movement fixation features; and the multi-modal expert mixing module is used for dynamically performing modal calling on the multi-modal mixed characteristics which are subjected to modal alignment and are fused with the electroencephalogram characteristics and the eye movement characteristics, performing emotion detection by utilizing an expert with a modal corresponding to the multi-modal mixed characteristics, and outputting an emotion classification result. According to the embodiment of the invention, alignment is realized through multi-task pre-training, and the depressive emotion is accurately recognized.

The invention discloses a vehicle-mounted augmented reality head-up display (AR-HUD) self-adaptive display adjusting system and method based on retina perception. The system comprises a retina perception parameter extraction module, a driving instruction response analysis module, a display light environment acquisition analysis module and a dynamic adaptive display optimization module. The method comprises the following steps: acquiring a retina perception threshold value of a user through a contrast sensitivity test before driving, extracting objective physiological parameters such as pupil diameter, blinking rate and fixation stability in a preset time window during driving, and calculating a comprehensive fatigue index F; a display area brightness distribution model is established in combination with vehicle-mounted light sensor data, F-based adaptive adjustment and safe amplitude limiting are performed on the brightness and contrast of an AR-HUD image, it is ensured that key information reaches the lowest recognizable contrast threshold, and an over-bright area is restrained. Compared with a fixed display adjusting scheme, the information readability can be improved in different light environments, the subjective fatigue score can be reduced, and the vehicle-mounted augmented reality head-up display adaptability and watching comfort can be improved.

The invention relates to the technical field of light atmosphere, and discloses a light atmosphere effect generation method, which comprises the following steps: generating an initial wave function according to an intensity field, deducing on the basis of a potential energy field to obtain a first wave function, performing intensity calculation and phase extraction from the first wave function to obtain a second wave function, updating the direction field based on the second wave function to obtain an updated direction field and an enhanced optical flow field; three core advantages of light atmosphere generation are realized, firstly, deep coupling of quantum optics and neurocognition is realized, real response of human eyes is simulated through a phase-sensitive light response model, and light atmosphere distribution is enabled to conform to quantum propagation rules and human visual cognition characteristics in combination with a cognition attention focusing mechanism of a DQN model; and 2, a dynamic self-adaptive mechanism runs through the whole process, and a light current coefficient and object motion data are adjusted in real time through the pupil diameter to feed back a new light flow field so as to ensure that the environment change can be quickly responded.

The application discloses a pupil data fatigue detection method, system and device based on infrared camera, and relates to the technical field of target detection. Eye infrared image data of a testee is acquired; an image processing algorithm is used to process the eye infrared image data to obtain position data and edge data of a pupil; according to the position data and the edge data of the pupil, a pupil diameter position change data set and a pupil center position change data set in a T time period are obtained; the pupil diameter position change data set and the pupil center position change data set in the T time period are compared with a visual analogue scale of fatigue severity to obtain a pupil data fatigue detection result. The application improves the detection accuracy of the visual fatigue degree of the testee.

The present invention relates to a novel refractive intraocular lens (IOL) having a continuous range of view, extended depth of field (EDOF), capable of providing a continuous clear field of view for cataract patients when objects from far to near while minimizing halo and glare phenomena. The novel refractive EDOF continuous visual range artificial lens provided by the invention has the advantage that the extended focal depth can be provided, so that a patient can obtain continuous vision from a far position to a near position (35-40cm). The spherical aberration of each area on the front surface of the artificial lens is optimized, halo and glare are reduced to the maximum extent, the 60-degree refraction section of the fourth area is used for providing balanced energy distribution when the pupil diameter is large, the pupil is irrelevant to magnification distribution, and the lens magnification and the extension focal depth are not affected by the pupil size or light conditions. The partition modification of the intraocular lens can be used as a controllable switch, and the focal depth can be adjusted according to requirements, namely, the focal depth is adjusted from a far vision field to a near vision field or from the far vision field to a middle vision field.

The invention relates to the technical field of refraction correction, in particular to a myopia control lens design method based on a heterogeneous scattering unit array, which comprises the following steps of: acquiring an eye axis length, a corneal curvature and a pupil diameter, calculating an incidence characteristic and a visual axis reference value, dividing functional areas according to an arrangement relationship between the incidence characteristic and a micro lens, and calculating a myopia control lens array; the method comprises the steps of building a coordinate index, analyzing structure parameter differences, reading parameters, calculating regulation and control characteristic values, and mapping array coordinates to generate a manufacturing instruction sequence. According to the structure arrangement and main visual axis relation, dividing functional sections, improving the matching degree of the area visual function, introducing a structure difference recognition and fine adjustment mechanism, improving the structure adjustment precision, and improving the manufacturing accuracy. The optical path control capability is enhanced, parameters are mapped into manufacturing instructions, the structure execution accuracy is ensured, the processing consistency is improved, closed-loop optimization from parameter acquisition, structure regulation and control to manufacturing instruction generation is integrally realized, the coupling of a visual intervention structure and functions is enhanced, and the stability and continuity of a correction effect are improved.

To provide an extended depth of focus (EDOF) that provides a cataract patient with continuous vision from distance to near with minimal halo and glare, and an intraocular lens (IOL) that achieves continuous vision.SOLUTION: To obtain continuous vision from a long distance to a short distance near 40-35cm by providing the extension of a focal depth. The spherical aberration of each zone of the anterior surface of the intraocular lens is optimized to minimize halo and glare. The fourth zone 60 degree segment design of the present invention provides a balanced energy distribution at large pupil diameters and makes the lens pupil independent of power distribution. The lens power and its extended depth of focus are independent of pupil size and lighting conditions. Furthermore, the change of zone of the intraocular lens can be used as a controllable switch to change the depth of focus according to the demand from far vision to near vision or from far vision to intermediate vision.SELECTED DRAWING: Figure 1

This invention belongs to the field of AR glasses control technology, specifically disclosing a smart AR glasses control method. This method continuously senses extreme environmental parameters before and during power inspection by real-time acquisition of high-voltage electromagnetic field spectrum, ambient light, and wind speed data in the power inspection area, solving the problems of existing AR glasses not considering environmental resistance and functional failure in extreme scenarios. Simultaneously, it utilizes Fast Fourier Transform to extract the dominant frequency characteristics of the electromagnetic field, combines this with ambient light statistics to adjust the AR glasses settings, and activates jitter compensation when wind speed exceeds limits, enabling the glasses to effectively avoid signal interference and ensure basic functional stability in power inspection scenarios such as strong magnetic fields and complex lighting. Furthermore, by synchronously monitoring the pupil diameter change rate and eyelid occlusion ratio, it verifies eye movement status in real-time throughout the inspection process and generates a precise iris gaze trajectory after dynamic judgment and calibration, ensuring the accuracy of eye-tracking interaction under complex working postures.

The invention discloses a pupil diameter automatic detection method based on infrared imaging. The pupil diameter automatic detection method comprises the steps that an eye image is collected; acquiring a grayscale image of the eye of the eye-closed patient by using infrared imaging equipment; preprocessing the image; performing size unification and normalization processing on the acquired infrared eye image to obtain a standardized input image; pupil segmentation; inputting the preprocessed image into an image segmentation network based on deep learning, and outputting a binary mask image of the pupil region by the network; acquiring a mask pixel area of the binarized mask image, and converting the mask pixel area into an equivalent diameter of a pupil region; and carrying out visual output on equivalent diameter data and other related image features of the pupil region in the adopted period. The method is high in speed and uniform in measurement standard, and human differences are reduced.

An objective evaluation system for dynamic characteristics of pupil light reflex, comprising: acquiring a non-doubt type area and an interference area of a color pupil image; constructing a pupil diameter-time change curve of a pupil sub-block coverage area in the non-doubt type area, acquiring key judgment parameters of the pupil diameter-time change curve of the patient under different scene information conditions, and additionally generating a key judgment parameter safety threshold interval under an anesthesia depth detection mode and a key judgment parameter individualized derivative parameter under a neurology follow-up mode; constructing a clinical evaluation reference table, evaluating the dynamic parameter set according to the clinical evaluation reference table, and acquiring a reflex grade corresponding to the dynamic parameter set; generating a standardized diagnosis and treatment suggestion and a clinical early warning signal of the patient according to the reflex grade, and generating a personalized evaluation conclusion of the patient's neurological function according to the key judgment parameter individualized derivative parameter, thereby providing a fine reference basis for early screening and severity determination of the disease.

The invention discloses a self-adaptive dimming system and method for a front windshield of a vehicle based on pupil detection, and belongs to the field of automobile intelligent glass and driver monitoring. The system monitors the ambient light intensity in real time through the photosensitive module, and extracts the pupil diameter and the change rate of a driver in combination with the near-infrared image acquisition module, so as to judge the visual comfort state of the driver. After a gaze area on the windshield is accurately positioned by using a sight tracking algorithm, the system drives the pixelated electrochromic layer to realize local, rapid and multi-gray-scale light transmittance adjustment. The core mechanism is to establish a negative feedback adjustment model based on pupil physiological reaction and light transmittance, and calculate and match the optimal transparency in real time. According to the method, manual intervention is not needed, the instantaneous blindness phenomenon caused by entering and exiting of the tunnel or strong light irradiation can be effectively relieved, and the driving safety and driving comfort in the complex light and shadow environment are remarkably improved.

The invention discloses a mydriasis-free fundus camera and an imaging method thereof, and the mydriasis-free fundus camera comprises an imaging system which is used for shooting an image of a fundus to be detected; the illumination system is used for providing illumination light for the fundus to be detected; the lighting system comprises a first lighting module and a second lighting module which are asymmetrically arranged; the first illumination module and the second illumination module are arranged in a front-back staggered manner along the optical axis direction of the objective lens to form a distributed illumination structure; the light emitting surface of the first illumination module and the fundus to be detected are in a conjugate relationship; and the light emitting surface of the second illumination module and the fundus to be detected are in a non-conjugate relationship. By optimizing the layout of the illumination module and introducing the polaroid system, more uniform illumination is realized, smaller pupil diameter is supported, the equipment size is reduced, cornea reflection is weakened, and eyepiece ghosting is effectively inhibited.

A display apparatus including display system and imaging systems for left-eye and right-eye and displaying an image of outside acquired by each of the imaging systems, the display system comprises display element, and optical element comprising incident surface, two reflection surfaces and exit surface. The display apparatus comprises limiting unit limiting light beam width so that light beam entering second pupil located behind the exit pupil does not satisfy diameter of the second pupil. When the second pupil is set at a position on an optical axis 10 mm away on an opposite side of the optical element with respect to the exit pupil, the limiting unit limits the light beam width such that at least a part of the light beam of an outermost peripheral angle of view on an outer side in the horizontal direction does not reach an evaluation pupil diameter of the second pupil.

The application discloses a kind of traditional village virtual repair style coordination evaluation method based on eye tracking, belong to traditional village protection and virtual reality technical field.The method constructs traditional village virtual repair scene three-dimensional model and divides attention area;Organization of subjects is browsed in VR environment, and eye tracking device is used to collect fixation point, gaze duration, saccade amplitude, pupil diameter and other eye movement data;Objective eye movement index of each area is extracted and combined with subjective score, and the style coordination comprehensive evaluation index is calculated by weighted fusion algorithm;With preset threshold comparison output coordination level and optimization suggestion.The application fuses objective eye movement data and subjective evaluation system, realizes the objectification and semi-quantification of style coordination evaluation, takes into account professional and public dual perspective, forms "scheme design-virtual evaluation-feedback optimization" pre-evaluation closed loop, and provides intuitive, efficient decision-making tool for scientific comparison and dynamic correction of traditional village repair scheme.

This invention discloses a pupil parameter measuring instrument and method, including a pupil pen and a back-end analysis and processing platform. The pen's head, middle, and tail are detachably connected. A miniature infrared camera is located at the center of the pen's front end. Several infrared supplementary lights, a visible light source, and a distance sensor are located at the front end of the pen's head. The miniature infrared camera, infrared supplementary lights, visible light source, and distance sensor are all electrically connected to a flexible PCB board. A microcontroller and a motor are located within the middle of the pen, and a display screen is located on the pen's housing. A power module is located within the tail of the pen. The microcontroller is electrically connected to the flexible PCB board, the motor, and the display screen. The pupil pen is connected to the back-end analysis and processing platform via a wireless communication module. This invention provides a pupil parameter measuring instrument and method that effectively reduces the subjective errors caused by traditional visual examination through multi-dimensional quantitative monitoring of pupil diameter, constriction rate, and constriction speed.

[Problem] To appropriately radiate light at an optimal radiance. [Solution] A light radiation device comprising: a first measurement unit that measures the pupil diameter of a subject; a control unit that, on the basis of the pupil diameter measured by the first measurement unit, controls the radiance of light irradiating the eye of the subject; and a light source that radiates light at the radiance resulting from the control by the control unit.

The application provides a campus landscape green view rate and visual health recovery evaluation method and system, comprising: identifying an initial imbalance degree according to a green view rate quantitative value and a sky visibility quantitative value, extracting a fixation point concentration through a fixation point spatial coordinate record, and extracting a pupil change amplitude through a pupil diameter change record; analyzing the fixation point concentration, identifying the inhibition of the pupil change amplitude when the fixation point concentration is high and the compensation of the fixation point dispersion when the fixation point concentration is low, and comprehensively obtaining an adjusted imbalance degree; determining a green view rate weight and a sky visibility weight according to the initial imbalance degree and the adjusted imbalance degree, integrating the green view rate quantitative value and the sky visibility quantitative value according to the weights to obtain a comprehensive visual recovery score; extracting a peak interval from a time record of the comprehensive visual recovery score, numerically filling the green view rate quantitative value and the sky visibility quantitative value in the peak interval, and identifying a candidate green view rate range and a candidate sky visibility range.

The invention relates to the technical field of eye vision optical equipment, and provides a binocular adjustment ability evaluation training instrument and an evaluation training method. The training instrument comprises a binocular optical module, a pupil imaging module, a display interface and a calculation processing module. According to the training instrument, a dynamic curve of the pupil diameter and the sighting mark distance is constructed by collecting pupil images in the sighting mark moving process, and the dynamic curve and a reference curve are subjected to difference area comparison. According to the method, the problems that an evaluation method in the prior art is high in subjectivity and cannot be quantized or only can be subjected to static measurement are solved, an objective, dynamic and quantifiable binocular adjustment capability evaluation means is provided, and the dynamic characteristics of human eyes in the adjustment process can be comprehensively reflected.

Various implementations use coaxial illumination to determine pupil features (e.g., perimeter location, pupil shape, pupil diameter, pupil center, etc.). Coaxial illumination involves producing light from a light source that is approximately coaxial with an image sensor that is configured to capture reflections of the light from the light source from an eye. The light from the light source can pass through the pupil into the eye and reflect off the retina to produce a bright-pupil type light pattern in data obtained by the image sensor. The light can be pulsed at a certain frequency so that frequency division can be used to distinguish reflections of the light that pass through the pupil off the retina from reflections of light from other light sources. In some implementations, the image sensor is an event camera that detects events. Pupil features can be assessed by evaluating events that recur in a given region at a given frequency.

The embodiment of the invention discloses a brightness adjusting method and device, equipment and a medium, and the method comprises the steps: obtaining the current pupil diameter of a user under the condition that the user wears head-mounted display equipment; according to preset first mapping data, obtaining a parameter value of a brightness adjustment parameter corresponding to the current pupil diameter as a target value of the brightness adjustment parameter; wherein the first mapping data is data reflecting the corresponding relation between the parameter value of the brightness adjusting parameter and the pupil diameter; and adjusting the screen brightness of the head-mounted display device according to the target value of the brightness adjustment parameter.

The invention discloses a full-electronic closed-loop feedback type self-service vision detection and vision training system and method, and relates to the technical field of intelligent medical equipment and human-computer interaction. The system comprises a variable focal power display module, a sensing and feedback module and a main control unit, and self-service vision detection, personalized closed-loop training and disease course dynamic optimization are realized through a'detection and training integration 'framework; in the detection stage, the near-infrared eye movement tracking technology is fused, and objective vision judgment is achieved based on eyeball micro-glancing and fixation stability; meanwhile, a fatigue fusing mechanism is constructed through pupil diameter and blink frequency monitoring, the response time trend is predicted and adjusted through a cloud LSTM model, and training modes are switched in a self-adaptive mode. According to the invention, the problems of unreliable subjective feedback, boring training content, lack of individuation, over-training risk and the like of the existing equipment are solved, and low-cost, high-frequency, safe and effective family vision nursing is realized.

The invention relates to an intelligent mind and pupil monitoring method and device, and the method comprises the steps: collecting a brain heat radiation signal, a micro-motion feature and a pupil video sequence of a patient, and obtaining the cerebral cortex neural activity data of the patient; inputting the pupil video sequence into a deformed pupil positioning model, and extracting a pupil contour, a pupil diameter, a light reflex incubation period and a contraction speed curve; inputting the brain heat radiation signal, the micro-motion characteristic and the cerebral cortex neural activity data into a time-frequency fusion neural network model, and identifying the consciousness state of the patient; according to the pupil contour, the pupil diameter, the light reflex incubation period, the contraction speed curve and the consciousness state of the patient, a comprehensive neural state index report of the patient is generated. According to the method, sub-pixel-level pupil contour segmentation is achieved, the pupil diameter is accurately extracted, the method has higher adaptability to light reflection latency and contraction speed curves, pupil deformation, shielding and illumination changes, and finer changes of the consciousness state can be captured.

The invention discloses a drug user noninvasive identification method based on pupil light reflex dynamic change, and the method comprises the steps: based on a heterogeneous stacking integration model optimized by a genetic algorithm, fusing Gaussian Process, Extra Tres, CatBoost, Gaussian Native Bayes and AdaBoost classifiers, and constructing a decision mechanism through a dynamic weighted voting strategy; according to the method, the recognition accuracy rate of 84.04% is obtained on an independent test set, the dominant frequency peak value and the pupil diameter variability are two characteristics with the largest contribution, and the accumulative contribution degree reaches 56.7%; according to the method, the clinical interpretability of the model is remarkably improved while rapid and non-invasive drug user screening is achieved, quantitative biological indexes are provided for autonomic nerve dysfunction caused by addictive drugs, effective technical means are provided for public health monitoring and clinical auxiliary decision making, and the method has wide application prospects.

Various implementations determine a pupil characteristic (e.g., perimeter location, pupil shape, pupil diameter, pupil center, etc.) using on-axis illumination. On-axis illumination involves producing light from a light source that is approximately on-axis with an image sensor configured to capture reflections of the light from the light source off the eye. The light from the light source may passes through the pupil into the eye and reflect off the retina to produce a bright pupil-type light pattern in data obtained by the image sensor. The light may be pulsed at a frequency so that frequency segmentation may be used to distinguish reflections through the pupil off the retina from reflections of light from other light sources. In some implementations, the image sensor is an event camera that detects events. The pupil characteristics may be assessed by assessing events that recur in a given area at the given frequency.

The invention provides a near-eye display device. The near-to-eye display device comprises an optical system and a display screen. The optical system includes a lens. The display screen is located on the incident side of the optical system. The image light emitted by the display screen is a discrete light beam, and the image light is configured to enable a display picture of the image light to pass through a crystalline lens of a human eye in a fine light beam mode and be imaged on the retina. The diameter of the thin beam is not larger than the pupil diameter of human eyes. The display screen of the near-to-eye display device emits discrete light beams, so that the light beams reaching the human eyes are thin light beams, and the thin light beams can weaken the effect of crystalline lenses in the human eye observation process. When the crystalline lens is in different diopter states, human eyes can clearly see a display picture, so that the display picture formed on the retina is basically not influenced by the problem of myopia astigmatism of the human eyes.

The application discloses an automatic center positioning and eyeball rotation compensation control system, method and equipment for femtosecond laser refractive surgery, and relates to the field of ophthalmic surgery equipment. The system comprises an image acquisition module, an image processing module, a motion control module, a negative pressure control module and a central processing module. The preoperative sitting visual axis deviation, iris texture and pupil diameter reference value are collected. The light is automatically adjusted during the operation to make the pupil diameter consistent with the pupil diameter reference value, thereby realizing high-precision automatic alignment. After the negative pressure suction ring physically contacts the cornea, the negative pressure is started to ensure stable sealing. After the negative pressure suction, the eyeball rotation angle is automatically calculated through iris feature matching, and the cutting model axis position is adjusted. The application realizes full-process automation, solves the problems of manual operation, large error and low efficiency in the prior art, and significantly improves the visual axis positioning accuracy and surgical safety through active control of physiological conditions (pupil diameter) and strict physical contact logic.

The embodiment of the application provides a wearable head eye movement tracking device, method, processing device and system, and belongs to the technical field of life science. The wearable head eye movement tracking device comprises a device outer frame, a hole is arranged in the middle of the device outer frame, the hole is through from top to bottom, and ear supports protruding downward are arranged on the two sides of the device outer frame, so that the device outer frame is fixed on the head of a dog; and the wearable head eye movement tracking device further comprises at least one eyeball tracking camera, the eyeball tracking camera is used for acquiring an eye image containing the eyes of the dog, and the eye image is used for being sent to a processing device in communication connection with the wearable head eye movement tracking device, so that the processing device identifies the eye image and obtains a target pupil diameter of the eyes of the dog. The application can realize tracking of eye information of a dog with a larger body size and stronger free activity without space limitation, and improves the accuracy of the collected eye information of the dog.

The application relates to the technical field of pupil parameter detection, and discloses a parameter quantification method and system based on an intelligent quantification pupil pen, a pupil pen and a medium.The method comprises the following steps: acquiring a resting image sequence of a target pupil in a non-stimulating measurement environment, processing the resting image sequence, and obtaining a resting pupil diameter; acquiring a dynamic image sequence of the target pupil in a visible light stimulating measurement environment, and obtaining dynamic parameters of the target according to the dynamic image sequence and the resting pupil diameter; and obtaining an analysis report according to the dynamic parameters and the resting pupil diameter.The application can directly output accurate numerical values such as the resting pupil diameter, the light reflex latency, the contraction speed, the contraction amplitude and the like, subjective estimation errors are eliminated, consistent results can be obtained by different operators using the same device, and the evaluation accuracy and reliability are improved.

The invention provides a method and device for adjusting the light transmittance of glass in a vehicle, and belongs to the technical field of glass light transmittance control. The method comprises the steps that a real-time picture of a driver of a vehicle and the illumination intensity in the vehicle are obtained, the real-time picture comprises the face of the driver, and the illumination intensity in the vehicle and the obtaining time of the real-time picture are located in the same time period; acquiring a real-time pupil diameter according to the real-time picture and the reference picture; the reference picture comprises the face of the driver; acquiring a reference pupil diameter under the illumination intensity in the vehicle from a pupil diameter change diagram, wherein the pupil diameter change diagram is a change diagram of the pupil diameter of the driver in a natural state along with the illumination intensity; calculating the deviation between the real-time pupil diameter and the reference pupil diameter; when the deviation is within the preset error range, the light transmittance of glass of the vehicle is adjusted according to the real-time pupil diameter; and when the deviation exceeds the preset error range, the light transmittance of the glass of the vehicle is adjusted according to the illumination intensity outside the vehicle, and the applicability of the method is improved.