Device and method for generating phosphene for simulating prothetic vision

Abstract

The invention provides a device and a method for generating phosphene for simulating prothetic vision. The device comprises an image supply module, a phosphene processing module and an image display module, wherein the image supply module is connected with the phosphene processing module to transmit external image information; and the phosphene processing module and the image display module are connected to transmit phosphene adjustment image information. The method for generating the phosphene comprises: inputting the image, preprocessing the image, blocking and dividing entropy intervals, selecting phosphene array distribution for each entropy interval, adjusting the point miss rate of phosphene arrays, setting parameters for each phosphene point, and displaying the image. In the invention, the shape, size, contract, frequency and color factors are taken into consideration in the setting of the parameters for the phosphene respectively, the setting of tortuous distribution of a phosphene queue and the miss rate of the phosphene points is adopted, different parameter settings are adopted for the intervals by separating the entropy intervals of the image, the finally obtain simulation result is closer to actual conditions, and the need for multi-parameter experiment is satisfied.

Description

technical field [0001] The present invention relates to a device and a method in the technical field of medical devices, in particular to a device and method for generating phosphenes for simulating prosthetic vision. Background technique [0002] The formation of vision requires a complete visual pathway. Damage or lesions in different parts of the visual pathway will lead to visual impairment or even blindness. Inspired by cochlear implants, scientists hope to restore the visual function of the blind by using visual prostheses. By stimulating the partially functioning nerve tissue in the visual system of blind patients, the blind can be helped to regain meaningful vision. According to the different implantation positions, the visual prostheses studied today can basically be divided into visual cortical prostheses, optic nerve prostheses, and visual prostheses. Prostheses and retinal prostheses. Studies have shown that applying electrical stimulation to ganglion cells in d...

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Problems solved by technology

At present, many psychophysical studies in the field of prosthetic vision use a method similar to this literature to simulate phosphene images, but there are the following shortcomings: the parameters of the phosphene viewpoint are single, and the phosphene image in the real situation is not considered. Other characteristic parameters of the viewpoint (such as size, color, frequency, etc.); the phosphene array has no distortion and missing settings, and it is difficult to simulate the real situation of the prosthesis implanter; the image processing method is single, and it cannot be based on the information of the image. pixelize volume features

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