124 results about "Artificial vision" patented technology

A flexible circuit electrode array with more than one layer of metal traces comprising: a polymer base layer; more than one layer of metal traces, separated by polymer layers, deposited on said polymer base layer, including electrodes suitable to stimulate neural tissue; and a polymer top layer deposited on said polymer base layer and said metal traces. Polymer materials are useful as electrode array bodies for neural stimulation. They are particularly useful for retinal stimulation to create artificial vision, cochlear stimulation to create artificial hearing, or cortical stimulation many purposes. The pressure applied against the retina, or other neural tissue, by an electrode array is critical. Too little pressure causes increased electrical resistance, along with electric field dispersion. Too much pressure may block blood flow.

Polymer materials are useful as electrode array bodies for neural stimulation. They are particularly useful for retinal stimulation to create artificial vision, cochlear stimulation to create artificial hearing, and cortical stimulation, and many related purposes. The pressure applied against the retina, or other neural tissue, by an electrode array is critical. Too little pressure causes increased electrical resistance, along with electric field dispersion. Too much pressure may block blood flow. Common flexible circuit fabrication techniques generally require that a flexible circuit electrode array be made flat. Since neural tissue is almost never flat, a flat array will necessarily apply uneven pressure. Further, the edges of a flexible circuit polymer array may be sharp and cut the delicate neural tissue. By applying the right amount of heat to a completed array, a curve can be induced. With a thermoplastic polymer it may be further advantageous to repeatedly heat the flexible circuit in multiple molds, each with a decreasing radius. Further, it is advantageous to add material along the edges. It is further advantageous to provide a fold or twist in the flexible circuit array. Additional material may be added inside and outside the fold to promote a good seal with tissue.

This invention concerns the tracking of objects in video data for artificial vision; for instance for a bionic eye. More particularly, the invention concerns a vision enhancement apparatus for a vision-impaired user. In other aspects, the invention concerns a method for enhancing vision and software to perform the method. The image processor operates to process video data representing images of a scene. Automatically detect and track a user selected object, such as a face, in the images. And, automatically modify the video data, by reserving a user selected area of the displayed images for displaying the tracked object as a separate video tile within the scene. The separate video tile remains in the selected area despite movement of the camera relative to the scene, or movement of the user relative to the object or the scene.

The present invention relates to a system and method for the automated inspection of geometric parameters of railway wheels rolling on a track by artificial vision techniques. The present invention uses a structured light source (10) that illuminates a line of light (12) upon a fraction of the surface of revolution (3) of a wheel (1), a CCD camera (20), which captures an image (21) of the illuminated area, and a data processing system that records, digitalizes, geometrically corrects and reconstructs information of the surface of revolution (3) that is not recorded in the image (21), in order to obtain a numeric description of the complete transverse section of the wheel (1) represented by a reconstructed profilogram (500) for calculating the geometric parameters of the wheel (1).

The current invention relates to the method to achieve artificial vision with using flexible substrate based light emitting arrays, or optical passage arrays, to project image upon the retina of a human eye. Further, it relates to the method to detect the real-time focal length change of the eye-lens and modify the flexible substrate curvature and distance from the eye to vary global angle configurations of light beams that go into the eye to produce images on the retina at various focus depth of the eye to achieve re-focusable artificial vision.

The invention discloses a regular graphic code used for locating an indoor mobile robot and a locating method which are used for solving the technical problem that an existing indoor mobile robot locating method is low in remote recognition efficiency. According to the technical scheme, the regular graphic code is a two-dimensional graphic code, and the pattern is a regular square module array andis composed of an encoding region and a functional graphic region, wherein the functional graphic region is a detection graph at the outer hollow-square-shaped position and used for locating the regular graphic code position in images collected by a camera; the encoding region is a two-dimensional lattice graph in the hollow-square-shaped region, marking points at the four vertexes of the two-dimensional lattice are used for marking the coordinate direction in the encoding region, and the other marking points serve as data information codes of the encoding region. The regular graphic code isadopted as an artificial vision road sign, three-dimensional pose measurement and location of the indoor mobile robot can be achieved, and remote recognition efficiency and accuracy are improved.

An artificial retina device and a retinal stimulation system and method for stimulating and modulating its function is disclosed. The artificial retina device includes multi-phasic microphotodiode subunits. In persons suffering from blindness due to outer retinal layer damage, a plurality of such devices, when surgically implanted into the subretinal space, may allow useful formed artificial vision to develop. By projecting real or computer controlled visible light images, and computer controlled infrared light images or illumination, simultaneously or in rapid alternation onto the artificial retina device, the nature of induced retinal images may be modulated and improved. The retinal stimulation system may be worn as a headset. Color images may be induced by programming the stimulating pulse durations and frequencies of the stimulation.

A visual prosthetic device is based on videodisc microelectrode array, belonging to the technical field of medical appliance. The device comprises a microelectrode array substrate, a microelectrode array and an electrode cable, and is characterized by further comprising a cover board and a retina nail; wherein, the two ends of the microelectrode array substrate are respectively provided with a through hole of the retina nail, the middle of microelectrode array substrate is provided with 18 electrode through holes, and the retina nail passes through the through hole of the retina nail to fix the microelectrode array substrate on a videodisc of the retina; the microelectrode array consists of 18 wire electrodes which are fixed in the electrode through holes that are arranged in the center of the microelectrode array substrate, one ends of the wire electrodes are connected in vitro by the electrode cables, and the cover board covers above the electrode through holes of the microelectrode array substrate to fix the microelectrode array. The visual prosthetic device is applied for generating artificial vision and is the medical device for helping the retina blindness patients to gain brightness and vision again.

A method of providing artificial vision to a visually-impaired user implanted with a visual prosthesis. The method includes configuring, in response to selection information received from the user, a smart prosthesis to perform at least one function of a plurality of functions in order to facilitate performance of a visual task. The method further includes extracting, from an input image signal generated in response to optical input representative of a scene, item information relating to at least one item within the scene relevant to the visual task. The smart prosthesis then generates image data corresponding to an abstract representation of the scene wherein the abstract representation includes a representation of the at least one item. Pixel information based upon the image data is then provided to the visual prosthesis.

The present invention relates to an artificial vision simulation and experimental system in the field of biomedical engineering technology. Said simulation and experimental system includes the following several modules: video image acquisition and processing module, stimulation pulse generation and control module and feedback diagnosis module. Said invention also provides the concrete action of the above-mentioned every module, and can simulate whole process of artificial vision, and can obtain the key technique and data of artificial vision process.

The present invention is a system for mapping a high resolution image to a lower resolution electrode array and, by applying varying stimulus to neighboring electrodes, creating a perceived image greater in resolution than the electrode array. The invention is applicable to a wide range of neural stimulation devices including artificial vision and artificial hearing. By applying a sub-threshold stimulus to two neighboring electrodes where the sum of the stimuli is above the threshold of perception, a perception is created in neural tissue between the two electrodes. By adjusting the stimulus on neighboring electrodes, the location of stimulation can be altered. Further, noise can be applied to the stimulating electrode or its neighboring electrodes to reduce the threshold of stimulation.

The invention discloses a colored printed matter defect automatic detection system and detection method based on machine vision. The automatic detection system comprises: an image acquisition system, an image processing system connected to the image acquisition system, and a display and control system connected to the image processing system. The image acquisition system converts the acquired printed matter image and color information into digital signals that can be processed by the image processing system, the image processing system computes the digital signals, extracts target characteristics, and then outputs the judgment result according to a preset judge criterion. The display and control system outputs the judgment result of the image processing system. By the way, the system and the method provided by the invention can improve the flexibility and automation degree of production, replace artificial vision, reduce the labor intensity of workers, improve the production efficiency and automation degree, and reduce the defective rate.

The invention discloses a micro-electrode array chip before retina in the field of artificial vision. The micro-electrode array chip comprises a chip substrate, a lead buried in the chip substrate and micro-electrodes protruding the surface of the substrate and forming an array. The edge of the lower end of the chip substrate is provided with at least two lower suture line preformed holes; a micro-electrode arrangement lower area, a micro-electrode arrangement middle area, a micro-electrode arrangement upper area, a substrate reduction area and a substrate expansion area are sequentially arranged on the chip substrate from bottom to top; the substrate expansion area contains contacts corresponding to the electrode arrangement areas, and are connected with the micro-electrodes through the lead buried in the chip substrate; the chip substrate close to the lower end of the substrate reduction area is provided with at least three groups of two sclera cut suture line preformed holes, and two edges are respectively provided with at least two upper suture line preformed holes; and two sides of the substrate expansion area are provided with eye external suture line preformed holes. The micro-electrode array chip can stimulate retinal ganlion cells of the blind to recover partial vision of the blind, and avoids rhegmatogenous retinal detachment, choroidal hemorrhage and sympathetic ophthalmia caused by iatrogenic retinal breaks.

The adaptive artificial vision method comprises the following steps: (a) defining successive couples of timesteps (t₋₁, t; t, t₊₁; . . . ) synchronized by a clock (101), (b) comparing two successive images (I_t−, I_t; I_t, I_t+1, . . . ) from an input device (102, 103) at each couple of synchronized timesteps (t₋₁, t; t, t₊₁; . . . ) spaced by a predetermined time delay τ₀ for obtaining a delta image Δ_t which is the result of the computation of the distance between each pixel of the two successive images (I_t−1, I_t; I_t, I_t+1, . . . ) in view of characterizing movements of objects, (c) extracting features from the delta image Δ_t for obtaining a potential dynamic patch P_t which is compared with dynamic patches previously recorded in a repertory which is progressively constructed in real time from an initial void repertory, (d) selecting the closest dynamic patch D_i in the repertory or if no sufficiently close dynamic patch still exists, adding the potential dynamic patch P_t to the repertory and therefore obtaining and storing a dynamic patch D_i from the comparison of two successive images (I_t−1, I_t; I_t, I_t+1, . . . ) at each couple of synchronized timesteps (t₋₁, t; t, t₊₁; . . . ), and (e) temporally integrating stored dynamic patches Di of the repertory in order to detect and store stable sets of active dynamic patches representing a characterization of a reoccuring movement or event which is observed. A process of static pattern recognition may then be efficiently used.

The invention discloses equipment and a method for forming artificial vision by electrical stimulation. The equipment comprises an image acquisition unit used for acquiring an image, a signal conversion unit used for converting the obtained image into an electrical stimulation signal, a signal transmission unit used for sending the electrical stimulation signal to an electrical stimulation array, the electrical stimulation array used for electrically stimulating corneas, scleras and/or eyelids in contact with the electrical stimulation array by the electrical stimulation signal and forming an electrical stimulation image on the corneas, the scleras and/or the eyelids. Through the equipment, the artificial vision is formed by electrically stimulating the corneas, the scleras and/or the eyelids; a flexible electrode array is buried or attached into a contact lens, so that a user can perceive the electrical stimulation image on the corneas by directly wearing the contact lens; the artificial vision is formed, so that image information of outside world can be perceived.

An artificial retina device to electrically stimulate a neuroretina of an eye to produce artificial vision, the artificial retina device comprising: an electrical source; at least one stimulating electrode connected with the electrical source; and at least one ground return electrode connected with the electrical source, wherein the stimulating electrode and ground return electrode are configured to be disposed within the eye on opposite sides of the neuroretina.