346 results about "Visual Stimulations" patented technology

According to the multi-mode visual stimulation and intelligent self-adaption combined myopia prevention and control system based on the AR glasses, all-weather, personalized and full-scene myopia suppression is realized through multi-module cooperation of sensory visual stimulation, visual function training, AI scene dynamic recognition and directional intervention, self-adaption closed-loop feedback, cloud / offline deployment and the like; through multi-dimensional visual stimulation and real-time physiological monitoring, eye axis growth is accurately regulated and controlled, myopia prevention and control precision is improved, out-of-focus and contrast setting are automatically optimized based on immediate refraction and adjustment feedback, personalized intervention is enhanced, lightweight AI and cloud pre-calculation are introduced, the endurance of equipment is effectively prolonged, an existing AR platform is compatible, the development process is simplified, and the development efficiency is improved. And the user compliance is enhanced.

The invention relates to the technical field of medical rehabilitation, and discloses a vestibular function and cognitive function rehabilitation training system and method based on virtual reality, and the rehabilitation training system comprises a hardware platform, a software platform and a server. The hardware platform comprises VR interaction equipment, a head motion tracking sensor and calculation and display equipment; the software platform is integrated with a user management module, a visual stimulation module, a vestibular rehabilitation training module, a cognitive evaluation and training module, a dynamic visual acuity evaluation module and a data management and analysis module. By combining black and white chess grid visual stimulation, standardized vestibular rehabilitation tasks, spatial cognitive testing and DVA objective monitoring, synchronous evaluation and personalized collaborative intervention of vestibular functions and cognitive functions of dizzy patients are realized. According to the method, the problems of boring traditional rehabilitation means, subjective evaluation and lack of quantitative feedback are solved, and the scientificity, interestingness and curative effect testability of rehabilitation training are remarkably improved.

The invention discloses an attention monitoring method and related equipment. Monitoring is realized through coordination of five steps of target detection, risk assessment, visual stimulation, electroencephalogram decoding and attention guidance. The method specifically solves the defects in the prior art: electroencephalogram signal decoding is adopted to replace a subjective report, so that emotion and cognition deviation is avoided, instantaneous attention monitoring is realized, and the hysteresis and non-objectivity of a subjective method are overcome; visual stimulation and electroencephalogram response association is used for replacing operation behavior inference, a mouse or touch equipment is not needed, remote monitoring is adapted, and insufficient real-time performance caused by operation delay is eliminated; the focus target is decoded through the SSVEP response frequency, the limitation of the eye tracker on the monitoring angle and the fixed posture is eliminated, and the method is suitable for the complex scene with multiple screens, multiple angles and multiple postures. Meanwhile, key target list dynamic generation and guide strategy automatic activation form closed-loop management, the key target omission risk is significantly reduced, and the man-machine cooperative monitoring efficiency and reliability are improved.

The invention discloses a cognitive disorder nostalgic audio-video intervention therapy method, which comprises the following steps of: building a scene containing nostalgic music art, classical movies and retro original sound, playing matched audio and visual materials to a patient, and guiding the patient to perform structured intervention activities such as puzzle, theme recall or emotion sharing. Therefore, memory is stimulated, cognition is exercised, and emotion expression is promoted; according to the invention, by integrating three layouts of audios of nostalgic music art, classical movies and retro original sounds with matched visual elements, a multi-scene nostalgic sensory environment is constructed, and auditory and visual channels of a patient can be synchronously stimulated; compared with single auditory or visual stimulation, the compound sensory stimulation can more effectively activate a plurality of brain areas related to memory and emotion in the brain, so that long-term memory of deep sleep is more intensively aroused, and the strength and awakening efficiency of reminiscence stimulation are greatly improved.

The invention belongs to the field of brain-computer interfaces, and particularly relates to a decision-making brain-computer method and device based on virtual reality induction, which combines two psychological decision-making tasks of auditory stimulation and visual stimulation and utilizes virtual reality equipment to create a decision-making brain-computer interface normal form of panoramic interaction, so that a subject can fit a scene facing a decision in reality to the greatest extent, and the accuracy of decision making is improved. The sensory motor cortex is effectively activated, and cooperative activation of the cognitive-motor neural network is induced; a decision interaction feedback link is added to enhance a decision stimulation effect and a cranial nerve feedback mechanism by analyzing related characteristics P300, power spectral density and brain network function connection quantity of the acquired electroencephalogram signals during normal form execution decision reaction. Compared with the prior art, the method has the advantages that immersive audio-visual stimulation and task interaction feedback are brought into a decision-making brain-computer interface for the first time, and a new scheme with neural rehabilitation and human-computer interaction functions is provided for neural feedback training of cognitive functions.

The invention discloses a method and device for distinguishing different subtypes of attention deficit hyperactivity disorder, and the method comprises the steps: setting visual stimulation information and auditory stimulation information, the visual stimulation information comprises visual letter information and visual square position information, and the auditory stimulation information comprises auditory letter pronunciation information and auditory digital pronunciation information; generating a stimulation strategy according to the visual stimulation information and the auditory stimulation information; performing visual and auditory stimulation processing according to the stimulation strategy to obtain a correct rate, average correct response time and a comprehensive score; and according to the correct rate, the average correct reaction time and the comprehensive score, carrying out attention deficit hyperactivity disorder subtype distinguishing treatment to obtain a subtype distinguishing result. According to the method, different subtypes of attention deficit hyperactivity disorder are distinguished, and the accuracy and efficiency are improved. The method can be widely applied to the technical field of behavioral data analysis.

The invention provides a vision assessment method and system based on augmented reality, and relates to the technical field of vision assessment, and the method comprises the steps: obtaining an environment correction parameter based on an environment parameter; generating visual stimulation according to the vision evaluation task, the environment correction parameter and the initial visual stimulation parameter; s103, obtaining response feedback of the user to the current visual stimulation, and performing feature extraction on the response feedback to obtain a feature vector; s104, inputting the feature vector into a pre-trained adjustment model to obtain a visual stimulation parameter adjustment amount, and adjusting the visual stimulation parameter based on the visual stimulation parameter adjustment amount to obtain an updated visual stimulation parameter; s105, generating updated visual stimulation according to the vision evaluation task, the updated visual stimulation parameters and the environment correction parameters; the steps S103 to S105 are iteratively executed until a preset evaluation termination condition is met; and inputting the structured evaluation sequence data into a pre-trained evaluation model to generate a vision evaluation result of the user.

A system and method is disclosed for testing and training a brain capability of planning and executing motion activity. The system comprises the following: an electroencephalographic sensor arrangement attachable to a head of said trainee; a processor configured for receiving and analyzing electroencephalographic signals obtained from said trainee in response to said visual stimulus displayed to said trainee; a memory storing instructions fori. instructing the trainee to imagine executing said motion action;ii. measuring electroencephalographic signals on the electroencephalographic sensor arrangement;iii. calculating at least one of a concentration index; a motor control index; an alertness index;iv. and iteratively providing the trainee with a feedback patternIn some embodiments a display is provided as a visual stimulus to the trainee to which the trainee responds by imagining executing a motion activity.

The embodiment of the invention provides a voxel-level semantic mapping method for a human visual cortex, and the method comprises the steps: building a corresponding relation between a visual stimulation feature and a human brain voxel response through a visual language model and a coding model; adopting a BLIP image description generation and word segmentation technology to extract a plurality of noun candidate tags from a human brain image sample set highly responsive to target human brain voxels; generating a plurality of image samples consistent with the plurality of noun-type candidate tags in terms of semantics in batches, and inputting the image samples into the coding model for response evaluation; and by sorting the voxel responses of the plurality of image samples, distributing semantic correlation scores for the plurality of noun type candidate tags. According to the voxel-level semantic mapping method for the human visual cortex provided by the embodiment of the invention, the label bias can be reduced by utilizing the visual language model by constructing a voxel-level semantic mapping mechanism running in an open vocabulary space. The embodiment of the invention further provides a voxel-level semantic mapping device and electronic equipment.

A vision test can be implemented in a virtual reality (VR) environment using a computer device that includes a head-mounted display (HMD). The computer device can obtain historical vision data of a patient user. Based on the historical vision data, the computer device determines an ordered sequence of vision tests including a first vision test for the patient user. The first vision test is followed by a set of one or more subsequent vision tests of the ordered sequence of vision tests. The computer device executes a user application configured to enable the ordered sequence of vision tests by rendering a user interface on the display. A first visual stimulus of the first vision test is displayed on the user interface. The computer device obtains a user response to the first visual stimulus, and dynamically adjusts one or more subsequent visual stimuli based on the user response.

A system and method relating to a brain-computer interface in which a visual stimulus overlaying one or more objects is provided, at least a portion of the visual stimulus having a characteristic modulation. The brain computer interface measures neural response to objects viewed by a user. The neural response to the visual stimulus is correlated to the modulation, the correlation being stronger when attention is concentrated upon the visual stimulus. The visual stimulus includes a feedback element that varies according to a measure of attention on the or each overlaid object.

The invention discloses a method and device for evaluating speech expression ability of neurological and mental diseases. According to the method, speech is induced through a visual stimulation material, speech data are collected, and after speech recognition, semantic calibration and text error correction, evaluation indexes are calculated from multiple dimensions of fluency, microcosmic linguistics and macroscopic linguistics in combination with a natural language processing technology, a large language model and a vector embedding technology, so that the evaluation accuracy is improved. And the result credibility is guaranteed through a robustness verification mechanism of iteration reflection of a double-big language model. According to the method, the problems of large subjective deviation, low efficiency and shallow analysis dimension of traditional evaluation are solved, and objective, accurate, efficient and comprehensive evaluation is realized.

Brain activity can be monitored to facilitate a vision test in a virtual reality (VR) environment using an electronic device that includes a head-mounted display (HMD) and a plurality of electrodes. The electronic device can execute a user application configured to enable a virtual vision test, and generates a VR user interface corresponding to a three-dimensional (3D) virtual environment. The electronic device renders, on the HMD, a user interface including a first visual stimulus corresponding to the virtual vision test. While displaying the visual stimulus, in real time, the electronic device collects a plurality of electrical signals by the plurality of electrodes that contact a head of a user, and determines information of at least one of a second visual stimulus following the first visual stimulus and a user response to the first visual stimulus based on the plurality of electrical signals.

A dichoptic visual stimulus is presented to a user's eyes by presenting a first visual stimulus to a first eye of the user, the first visual stimulus being presented with a first modulation, and presenting a second visual stimulus to a second eye of the user, the second visual stimulus being presented without the first modulation. The first visual stimulus and second visual stimulus are configured to cause the user to perceive the first visual stimulus and the second visual stimulus as a single visual element, and to perceive the visual element as being unmodulated by the first modulation. Neural signals are obtained from a neural signal capture device configured to detect neural activity of the user. In response to determining, based on the neural signals, that the first eye is focused on the first visual stimulus, a computing system executes a command associated with the dichoptic visual stimulus.

The invention discloses an SSVEP (Steady-State Visual Evoked Potential) recognition system and method based on linear frequency modulation visual evoked potential migration. The visual stimulation generation and presentation module generates and presents a visual stimulation signal; the electroencephalogram signal acquisition module is used for acquiring Chirp-VEP and SSVEP electroencephalogram signals; the electroencephalogram signal preprocessing module is used for preprocessing the collected electroencephalogram signals; the Chirp pulse matrix construction module is used for converting a Chirp signal to obtain a Chirp pulse matrix, the Chirp-VEP decomposition module is used for constructing a least square optimization problem to solve common model parameters of Chirp-VEP, and the common model parameters are migrated to SSVEP through the SSVEP identification module to carry out feature extraction and classification. According to the method, the system overhead is reduced, the calibration time is shortened, the training cost is minimized while the optimal performance is kept, and the practicability of the brain-computer interface based on SSVEP is improved.

The invention belongs to the technical field of mouse neuroscience research, and relates to a multi-modal mouse virtual reality and nerve recording integrated system based on skull anchoring, which comprises a skull anchoring basic support, a binocular miniature VR display module, a multi-modal fixed expansion frame and a behavior and power supply platform. According to the invention, the skull screw is used as a unique space reference, accurate limiting of the head is realized through rapid butt joint of the MMA and the external fixing rod, and rapid plugging and coordinate multiplexing of equipment for two-photon imaging, optical genetic stimulation and the like are realized in combination with an M2 anchoring hole preset in the MMA; the total mass of the whole machine is strictly controlled within 3.2 g; the optical system provides panoramic visual stimulation with a horizontal field angle of 140 degrees, completely covers a key binocular vision area on the top of the mouse head, and supports high-order cognitive task paradigms such as complex ecological visual navigation, spatial memory and social interaction.

The invention provides a virtual reality body rehabilitation system. The virtual reality body rehabilitation system comprises a virtual domain system, a body feeling stimulation system, a body feeling evaluation system, an equipment domain system and a central control module. The virtual domain system specifically induces the sense of ownership, the sense of autonomy and the sense of position by creating a virtual environment of a virtual avatar, real-time action mapping and adaptation rehabilitation tasks; the body feeling stimulation system takes visual stimulation as a core and is matched with linkage of various kinds of sensory stimulation, so that the authenticity of body experience is enhanced; the body feeling evaluation system evaluates real-time body feeling and provides reliable data support for regulation and control. On the basis of the physical cognition theory, the virtual reality technology, the multi-mode sensing technology, the neuroscience and the rehabilitation medicine principle are fused, multi-channel feeling collaborative stimulation such as vision, body feeling and touch feeling is achieved by constructing the immersive virtual environment, a patient is induced to generate physical experience, abnormal body representation is remodeled, nerve plasticity and function recovery are promoted, and the rehabilitation effect of the patient is improved. The patient is helped to return to normal life and society.

The invention discloses a cognitive disorder recognition system and method based on audio and video modal decoupling representation learning, and the system comprises an integrated processing and display terminal module which is used for operating data, presenting visual stimulation, controlling a collection process, and preliminarily storing data; the visual stimulation presentation and task instruction module is used for clearly and standardly displaying a preset cognitive evaluation task to the participant and informing the participant of specific operation needing to be completed; the audio and video synchronous acquisition module is used for capturing dynamic visual information when a participant executes a task and acoustic information when the participant executes the task; the cognitive state and auxiliary information input module is used for allowing an operator to input information; the control and management module is used for realizing standardized operation and ensuring consistency and high efficiency of data acquisition; and the cognitive impairment recognition module is used for performing multi-modal analysis processing on the data. The early cognitive impairment screening method can provide efficient, accurate and generalizable early cognitive impairment screening for the elderly groups in the community.

A dichoptic visual stimulus is presented to a user's eyes by presenting a first visual stimulus to a first eye of the user, the first visual stimulus being presented with a first modulation, and presenting a second visual stimulus to a second eye of the user, the second visual stimulus being presented without the first modulation. The first visual stimulus and second visual stimulus are configured to cause the user to perceive the first visual stimulus and the second visual stimulus as a single visual element, and to perceive the visual element as being unmodulated by the first modulation. Neural signals are obtained from a neural signal capture device configured to detect neural activity of the user. In response to determining, based on the neural signals, that the first eye is focused on the first visual stimulus, a computing system executes a command associated with the dichoptic visual stimulus.

The invention provides a visual motion function test system and method based on full-view surround synchronous visual stimulation, and is applied to the technical field of medical data processing. Visual stimulation parameters and rotating bar motion mode parameters are combined, the rolling direction of a bar and the rotating direction of a rotating bar are synchronously matched, a synchronous presentation scene of visual stimulation and motion tasks is established based on a four-screen linkage control technology and a rotating bar-screen adaptive design, and full-view stimulation constraint conditions are generated; processing is carried out based on visual stimulation parameters, rotating rod reference data, synchronous control logic and dynamic parameter combination constraint conditions, and rod time, rotating speed during falling and motion trail data are collected; processing the collected kinematics data, and combining functional parameters including visual state grouping and brain region neuron activation counting to generate motion balance ability and brain function associated data; and processing by combining normality test and an inter-group statistical method to generate a vision-motion function evaluation result.

A method and system for detecting intentional selection of a user interface element using a binocular display. A first visual stimulus is presented stereoscopically to a user's eyes at a first virtual depth perceived by the user's depth perception and overlapping a first position within a field of view of the user. A second visual stimulus is presented stereoscopically to the user's eyes at a second virtual depth perceived by the user's depth perception and overlapping the first position. Neural signals are obtained from a neural signal capture device configured to detect neural activity of the user. In response to determining, based on the neural signals, that the user's eyes are focused on either the first visual stimulus or second visual stimulus, a computing system is placed into a first state or second state, respectively, associated with the first visual stimulus or second visual stimulus, respectively.

The present invention relates to an apparatus (10) for the self-administration of therapies for the treatment of speech disorders comprising a stimulus delivery device (11,12) with a horizontal development substantially curved along an angular portion so as to outline a portion of a circle, comprising at least one panel (11) for the delivery of visual stimuli spatially distributed in an angular range substantially equal to the angular portion of horizontal development of the stimulus delivery device (11,12); at least one acoustic source (12) for the delivery of acoustic stimuli spatially distributed in an angular range substantially equal to the angular portion of horizontal development of the stimulus delivery device (11,12); and a local electronic processing unit configured to control the generation of visual and acoustic stimuli by means of the at least one panel (11) and the at least one acoustic source (12), and characterized in that it comprises at least one first acoustic detector (15) for detecting a reproduction of a verbal element produced by the patient, wherein the at least one first acoustic detector (15) is carried by the at least one panel (11) and positioned so as to detect acoustic signals generated in a space inside the portion of circle outlined by the stimulus delivery device (11,12).

The application provides a SSVEP-based brain-computer interface stimulation modulation method, system, device and medium, comprising the following steps: acquiring a preset code sequence set, a stimulation frequency set and a stimulation paradigm; the code sequence set comprises a plurality of code sequences; the code sequence comprises a plurality of code elements, and the code element corresponds to a brightness amplitude depth coefficient; the stimulation frequency set comprises a plurality of stimulation frequencies; the stimulation paradigm is used for modulating the brightness amplitude depth and the flicker frequency of visual stimulation based on the code sequence and the stimulation frequency; based on the code sequence and the stimulation frequency, a code stimulation combination of the code sequence and the stimulation frequency is generated; and based on the code stimulation combination, the visual stimulation corresponding to each stimulation block is modulated by using the stimulation paradigm. The SSVEP-based brain-computer interface stimulation modulation method, system, device and medium provided by the application not only expand the number of stimulation targets, but also improve the comfort of users when gazing at the visual stimulation.

A cognitive assessment and stimulation method and a robotic platform for hippotherapy that comprises a structure comprising at least a high torque servomotor, and an articulated mechanism that simulates the horse's head, at least two load cells placed on the articulated mechanism of the structure, for controlling direction and speed, at least one seat module, that comprises at least one inertial sensor of posture intended to be placed on the patient to determine his / her posture, and one or more load cells placed on the seat to determine the load distribution thereon; and at least two pressure sensors for speed control and that further comprises a temperature control module, which allows temperature control, a visual stimulation sub-module and / or an auditory stimulation sub-module, a crane type module coupled to a harness comprising some stirrups which allow the transfer of the patient and also providing control of weight on the platform and give security to the patient, avoiding the risk of falling.

Provided herein are systems, methods, and computer program products for determining partial impulsivity of a user of a virtual or augmented reality system. A virtual environment having a plurality of targets is provided. A visual stimulus is provided at a target. A first period of time from when the first visual stimulus is provided to when a user fixates on the visual stimulus, a first acceleration of the body part, a second period of time from when the first visual stimulus is provided to when the first acceleration occurs, a second acceleration (deceleration) of the body part, a third period of time from when the first acceleration occurs to when the velocity of the body part is zero is determined, a total fixation time on the visual stimulus, a total number of impulsive movements in a session, and an impulsivity score are determined.

To estimate an arousal direction of a driver of a vehicle.SOLUTION: A first derivation unit 41 derives a first index value corresponding to a driver's visual stimulation based on a front image of a vehicle obtained by an imaging unit. A second derivation unit 42 derives a second index value corresponding to a relatively strong visual stimulation among a driver's visual stimuli based on a result of comparing the first index value with a predetermined stimulation threshold. An arousal direction estimation unit 43 estimates an arousal direction, which is a direction of change in the driver's arousal level, based on a correlation between a temporal change in the first index value and a temporal change in the second index value.SELECTED DRAWING: Figure 9

The application discloses a color resolution measurement system, comprising a parameter acquisition module, a visual stimulus generation module, a human-computer interaction module, a process control module and a data recording and analysis module. The parameter acquisition module acquires measurement parameters; the visual stimulus generation module generates color visual stimuli for measurement; the human-computer interaction module presents the stimuli to the measured individual and acquires the recognition of the visual stimuli by the measured individual; the process control module controls the measurement process; and the data recording and analysis module records the measurement data and analyzes and determines the color resolution threshold. The color resolution measurement system provided by the application can quantize the resolution capability of the measured individual to various colors through targeted visual stimulus design, measurement process control and data analysis method, can adjust the measurement precision through parameter setting, has simple task design and operation mode, is suitable for animal function evaluation and has a broader application prospect.

A virtual vision test can be performed to evaluate response time in detecting subtle visual changes under varying light conditions in a virtual reality (VR) environment. The test can be conducted using an electronic device with a head-mounted display (HMD) and a camera. The device can generate and render a VR user interface in a photorealistic virtual environment, simulating dynamic lighting scenarios. The device can continuously track eye movements in response to visual stimuli presented in these scenarios. The system can then evaluate the detection of subtle visual changes based on the tracked eye movements, and provide a comprehensive assessment of visual acuity and responsiveness under different lighting conditions.

A display system and methods for providing visual stimuli to a user to improve conditions related to amblyopia. The display system comprises a display device configured to provide left and right display elements and a computer unit for providing the visual content to the display device. The computer unit is configured to provide to the left display element left visual content comprising a left base layer and a left stimulation layer and to the right display element right visual content comprising a right base layer and a right stimulation layer. The left stimulation layer and / or the right stimulation layer is / are implemented with one or more mix functions to display a grating image on the display device. The mix functions are configured to exhibit spatial frequency and drift velocity so the grating image of the left stimulation layer and / or the right stimulation layer moves continuously across the display device.

The utility model discloses visual function adjustment training appearance and system relates to ophthalmic optics instrument technical field. A kind of visual function adjustment training appearance, including display panel and light stimulation part, the front of display panel includes the display for output visual stimulation information;The light stimulation part includes the light district at the outer periphery of display panel front, and light district is arranged with light emitting piece to radiate the light of preset wavelength for user visual, and the eyes of the user are illuminated. The utility model improves the adjustment and training effect of visual function by the synergistic effect of visual stimulation information and illumination.