Self-operated measuring unit for reaction of pupil aperture to light based on digital image processing

Abstract

The invention provides a self-operated measuring unit for reaction of the pupil aperture to light based on digital image processing. The self-operated measuring unit consists of a uniform light stimulator, an infrared image acquisition module and pupil measuring software, wherein the uniform light stimulator is used for controlling hardware and a light source array to establish a photostimulation environment conforming to an International Society for Clinical Electrophysiological of vision (ISCEV) standard; the infrared image acquisition module is used for dynamically acquiring images and transmitting the images into a memory; the pupil measuring software is used for performing filtering processing and equilibrium processing on the images, performing recursive partitioning on the images according to a gray average and a variation proportion, extracting feature information including area, perimeter and circularity for judging whether the images are pupils of human eyes, and performing curve fitting, identification, and position and radius parameter extraction on verified pupils. According to the measuring unit provided by the invention, three kinds of stimulation light in red, white and blue conforming to the required strength of reaction of pupil to light can be generated, the size change of the reaction of pupil aperture to light is measured in real time, the shrinkage change rate of beam-focusing stimulation is calculated, and stability and accuracy are realized.

Description

technical field [0001] The invention relates to the technical field of pupil detection, is applicable to the detection of changes in the pupil's response to light and disease discrimination, and has broad application prospects in the auxiliary detection of medical ophthalmology. Background technique [0002] The light response of the pupil of the human eye is an important basis for judging the retinal disease of the human eye. The amount of light entering the eye can be adjusted by enlarging and shrinking, thereby affecting the magnitude of retinal aberration. The traditional visual electrophysiological examination method cannot effectively detect the pupillary response to light due to its contact and non-quantitative detection. [0003] At present, regarding pupil detection, a large number of different research methods have been proposed at home and abroad. The template matching method based on the template method takes a lot of time due to the irregular template, and the r...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the interference factors introduced by the stimulation environment and collection and the complex operation of the recursive inter-class variance method, the present invention generates stimulation light of a specified level and color to stimulate the pupil according to medical requirements, and uses digital image processing methods to extract the pupil and its components. Aperture and other parameters, real-time detection of changes in pupil response to light stimulation

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