Eye state identification device and eye state identification method based on infrared detection

An eye state and infrared detection technology, applied in the field of image recognition, can solve the problems of slow response speed, high implementation cost, large calculation amount, etc., and achieve the effect of low cost, good real-time performance and small amount of calculation.

Active Publication Date: 2015-10-28
CHINA THREE GORGES UNIV
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Problems solved by technology

All of the above methods can perform non-contact detection of human eyes, but the technology is relatively complicated, the amount of calculation is large, the recognition speed depends on the operation speed of the image processing chip, the response speed is slow, the volume is large, and the implementation cost is high

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  • Eye state identification device and eye state identification method based on infrared detection
  • Eye state identification device and eye state identification method based on infrared detection
  • Eye state identification device and eye state identification method based on infrared detection

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Embodiment Construction

[0030] Principle analysis:

[0031] If the luminous intensity of the infrared light source is I, it is the luminous flux of the light source per unit solid angle. The area of ​​the infrared light source is S, the distance to the eye is r, the irradiated area of ​​the eye is S', and the irradiated area of ​​the eyelid is assumed to be S L ', the irradiated area of ​​the cornea is S J ', S'=S L '+S J '. The reflectivity of the eyelid and the cornea to infrared light is different, and the reflectance of the eyelid is R L , the corneal reflectance is R J , both of them are regarded as approximate cosine radiators, the light intensity received by the infrared receiver is:

[0032] E = ∫ S L ′ ∫ S R L sin 2 U × Ids ...

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Abstract

An eye state identification device and an eye state identification method based on infrared detection are provided. The eye state identification device comprises an infrared transmitting module and an infrared receiving module which are arranged around an eye. The infrared transmitting module and the infrared receiving module are connected with a single chip microcomputer module, and the single chip microcomputer module is connected with a positioning module. The single chip microcomputer module is further connected with a communication module and an alarm module. According to the eye state identification device and the eye state identification method based on infrared detection, the eye movement is monitored by transmitting infrared light actively and detecting the intensity of reflected light in different eye positions based on the fact that different optical surfaces have different reflectivity to infrared light. The device and the method have the characteristics of simple structure, small size, a small amount of calculation, and good real-time performance.

Description

technical field [0001] The invention relates to an image recognition method, in particular to an eye state recognition device and method based on infrared detection. Background technique [0002] At present, there have been a variety of detection methods to detect whether the subject is conscious and early warning, such as: behavioral characteristics (head movement, eye movement, gaze direction, etc.), physiological parameters (electroencephalogram, electrocardiogram, respiratory status, muscle activity, etc.) detection to judge the state of consciousness of people. Among these detection parameters, eye movement is the most widely used feature, and the recognition of eye state can be used to judge the level of consciousness. There are various detection methods for eye movements or states. The PERCLOS algorithm measures and detects the state of the eyes, such as pupil diameter, gaze, eye movement, and the length of time when the eyes are closed. Iris recognition is to use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B21/06
CPCG08B21/06
Inventor 何慧灵戴后清韩龙飞郑胜潘礼庆
Owner CHINA THREE GORGES UNIV
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