关键词: 眼睛定位, 等亮度线, 数学形态学, 眼睛状态, 疲劳检测

Abstract: Majority of vision-based methods are carried on through the analysis of eye states so as to confirm the states of fatigue，among which the accurate localization of the eyes and the precise analysis of the eye states are the key links.This paper puts forward an efficient eye localization and eye states analysis method，which detects the face under natural environment in advance，and then locates the eyes accurately as well as analyzes the eye states.First of all，an isopleths method is applied to accurately detect the regions of the eyes and preprocess the image，and then the eye states can be determined by using the mathematical morphology method.Experimental results show that the means raised can react the continuously changing states of the eyes with efficiency and high accuracy，in addition it also meets the needs of application requirements of fatigue detection.

Key words: eye localization, isophote curvature, mathematical morphology, eye states, fatigue detection