11 results about "Visual prosthesis" patented technology

The invention discloses a visual prosthesis control method and system and a storage medium, and relates to the field of medical instruments, and the method comprises the steps: extracting at least one initial target image based on a target object selection result fed back by a user, carrying out the region-of-interest extraction of the initial target image, and obtaining a target object contour image, grouping each contour pixel point based on the brightness values of the contour pixel points in the target object contour map to obtain a plurality of data groups and a stimulation sequence thereof, mapping a stimulation current matrix of each data group based on the stimulation current value and the space coordinate of each contour pixel point, and obtaining a stimulation current matrix of each data group based on the stimulation sequence; and controlling the release of the stimulation current in the electrode array based on each stimulation current matrix in sequence. Redundant information is reduced based on user feedback and region-of-interest extraction, the stimulation sequence based on the average brightness value of each data set is configured, the stimulation current is controlled to be released in the electrode array based on each stimulation current matrix in sequence, and the perception quality of the brain to the target object is improved.

An artificial retinal prosthesis is disclosed for electrically stimulating a retina of an eye by spatiotemporal electrical stimulation to provide color visual perception. The prosthesis comprises a plurality of pixel group units, each including a main pixel unit and at least one auxiliary pixel unit. The main and auxiliary pixel units are driven according to different sequences of cycles, each cycle comprising a dark period followed by a lighted period, such that the pixel units intermittently output lighted pulses. During the lighted periods, the main pixel unit is nominally turned on for at least one lighted duration except for an off duration while the auxiliary pixel units are continuously turned on for the entire lighted period. During the dark periods, both the main pixel unit and the auxiliary pixel units are continuously turned off for the entire dark period.

The invention discloses a cortex visual prosthesis control method and system based on reinforcement learning and behavior feedback, and the method comprises the steps: obtaining a visual image of an external environment, and extracting a feature vector of the visual image; inputting the feature vector into a reinforcement learning environment to generate an electrical stimulation pulse sequence corresponding to a plurality of microelectrode channels; applying the sequence of electrical stimulation pulses to a microelectrode array implanted in the visual cortex of a patient to induce light magical perception; behavior feedback generated when the patient executes a visual recognition task based on the light magical visual perception is obtained; and updating parameters of the reinforcement learning environment based on the behavior feedback to form closed-loop optimization. The stimulation strategy can be evolved on line, the cortical function recombination state of an individual caused by long-term blindness is automatically adapted, the morphological drift of light magical vision along with time can be effectively dealt with, and therefore the stability and long-term availability of artificial visual perception are remarkably improved.

The application discloses an implant device and a visual prosthesis with the same, the implant device comprises: a ring-shaped shell, a containing cavity is defined in the ring-shaped shell, the ring-shaped shell is a metal shell and is provided with a gap; a cover body, the cover body covers the containing cavity; a coil, the coil is used for transmitting data and / or energy, the coil is arranged in the containing cavity; a stimulation circuit board, a first end of the stimulation circuit board is connected with the coil, a second end of the stimulation circuit board is a stimulation end, and the second end extends outward from the ring-shaped shell. Thus, the implant device is small in size, and by arranging the gap in the ring-shaped shell, the shielding existing in the containing cavity is reduced, the eddy current of the metal shell under electromagnetic induction is reduced, the heating caused by the eddy current is reduced, the efficiency of wireless transmission is ensured, and then the radio frequency signal of the coil can be stably and reliably transmitted.

The invention relates to a target recognition-oriented multi-dimensional collaborative visual prosthesis electrical stimulation coding method and system, electronic equipment and a storage medium. The method comprises the following steps: acquiring a two-dimensional target instance; saliency map quantization and edge and key point feature extraction are carried out on the two-dimensional target instance to obtain a linkage quantization grading atlas comprising multi-dimensional features; converting the linkage quantization grading atlas into a multi-dimensional feature quantization atlas adaptive to the size of the target electrode array; acquiring a multi-dimensional feature electrical stimulation parameter sub-atlas sequence corresponding to the multi-dimensional feature quantization atlas; and modulating an electrode array stimulation strategy according to a visual prosthesis communication protocol by using the multi-dimensional characteristic electrical stimulation parameter sub-atlas sequence, and generating a voice feedback signal accurately synchronized with a visual electrical stimulation time sequence by using a text-to-voice technology. According to the method, accurate locking of a semantic effectiveness and visual saliency target is realized, the electrical stimulation coding identification degree of multi-dimensional feature linkage quantitative classification is also remarkably improved, the electrical stimulation power consumption under a visual persistence effect is effectively reduced, and the accuracy of target identification is greatly improved through cross-modal collaboration.

This invention discloses an intelligent visual prosthesis system and encoding method. The system includes an external sensing processing unit and an internal implanted stimulation unit. The external sensing processing unit includes at least an environment sensing unit and a first data processing unit, and the internal implanted stimulation unit includes at least a stimulation signal generation unit and an electrode array. The environment sensing unit is used to acquire a target image. The first data processing unit is used to match the current scene to a preset lighting scene mode according to the image features or ambient illuminance of the target image, independently configure anchor points for the corresponding image grayscale value boundaries for the matched lighting scene mode, and generate a grayscale-charge density mapping relationship corresponding to the lighting scene mode. Then, the grayscale value of each pixel of the target image is mapped to the corresponding target charge density, and a stimulation command is generated and output to the stimulation signal generation unit. The stimulation signal generation unit is used to generate an electrical stimulation pulse sequence according to the stimulation command and a preset reference pulse width and output it to the electrode array.

The invention provides a visual prosthesis wireless energy and data transmission system and method based on a human body medium, and relates to the technical field of wireless transmission. The intelligent glasses comprise a first transmission electrode; the visual prosthesis comprises a second transmission electrode; the first transmission electrode is connected with the second transmission electrode through human tissues; the intelligent glasses are used for conducting energy transmission and / or data transmission with the visual prosthesis through the first transmission electrode, the human tissue and the second transmission electrode. By means of the mode, the human body medium technology is introduced into the visual prosthesis to achieve energy supply and data transmission of the visual prosthesis, the size of the visual prosthesis can be effectively reduced, the data transmission rate can be increased, the transmission distance can be increased, and long-distance transmission can be achieved.

In artificial vision parameter automating method, the system includes a sensory module, a communication module, a database, an image processing module, a learning module and a automating and storing module. The sensory module is configured to take images. The communication module is configured to be send the data obtained from the sensory module to the database. The database is configured to store the images received from the communication module. The image processing module is configured to convert a selected image from the database into a low-resolution phosphene image, to generate test images with various artificial vision parameters. The learning module is configured to extract important features from high-resolution training images, and to build various machine learning models competent at identifying visual stimuli from low-resolution phosphene images. The automating and storing module is configured to automatically select and store primary test data, based on the learning in the learning module.

The invention discloses a control system and method for a visual prosthesis, and provides three schemes including a virtual patient model, bandwidth adaptive coding and a multi-modal closed loop for solving the three problems of insufficient training and evaluation channels, limited implantation link bandwidth and disjunction of simulation and real experience in visual prosthesis research and development. A repeatable, low-risk and high-efficiency control system is constructed, the virtual patient model is used for replacing scarce real implanters to perform large-scale tests, the dependence on the implanters is reduced, the dependence on frequently-used implanters is not needed any more, key information is preferentially transmitted in a limited bandwidth by using the virtual patient model, and the definition and efficiency of visual reconstruction are improved. Moreover, according to the feedback information of the experiencer, the system collects feedback and safety threshold values in real time, the next round of light spots are automatically adjusted, a closed loop of stimulation-perception-adjustment is formed, and the research and development efficiency and effect of the visual prosthesis can be effectively improved.

The application discloses a cortex visual prosthesis implantable antenna based on water-based medium resonance and belongs to the technical field of medical devices, which comprises a ring-shaped shell, a ring-shaped inner shell is arranged in the ring-shaped shell, a through groove is formed in the side wall of the ring-shaped inner shell, the through groove is communicated with the inner space of the ring-shaped shell and the inner space of the ring-shaped inner shell to form a water cavity, a water body is arranged in the water cavity, a metal floor is fixedly connected to the bottom end of the ring-shaped shell and the ring-shaped inner shell, a top shell is fixedly connected to the top end of the ring-shaped shell and the ring-shaped inner shell, a coaxial feeder is embedded in the ring-shaped inner shell and the top shell, and the outer conductor of the coaxial feeder is connected with the metal floor; the water-based medium resonance antenna is arranged, the use of metal structures is reduced, the volume is reduced, the current on the irregular metal can be prevented from increasing ohmic loss to increase the risk of thermal damage, the effective thermal protection performance is ensured, and the strict requirement of human brain tissue on thermal protection is met.

An implantable device includes a flexible cable, a circuit chip, a fluid adhesion layer, and a vapor deposited layer. The flexible cable includes a lead-in part, a stimulation part and a connection part connected between the lead-in part and the stimulation part. The circuit chip is fixed to a surface of one side of the lead-in part, and is electrically connected to the lead-in part. The fluid adhesion layer is adhered to an outer side of the circuit chip and an outer side of the lead-in part. The vapor deposited layer (4) is directly deposited on an outer side of the fluid adhesion layer.