摘要： 描述了人眼的自动定位算法，其方法是利用图像的灰度投影曲线，将图像缩小在人脸的眼部区域，进而确定人眼在眉眼区域的大致位置，然后通过了灰度直方图估计初始阈值，对二值化眉眼区域进行了阈值分割，利用二维相关系数判定双眼黑块的出现并利用对称相似性进一步确定了双眼的具体位置。

关键词: 人眼定位；阈值；人脸识别

Abstract: This paper presents the algorithm of locating eyes automatically. By utilizing the gray projection curve of the facial image, this paper focuses on the area of the eyes in the image, and decides the position of the eyes. The gray-level histogram estimates the value of the initial threshold and segment the two-leveled area of the eyes. This paper uses the 2-D correlation coefficients to judge the appearance of the black block in two eyes.This paper further locates the position of two eyes, according to the similarity of symmetry.

Key words: Localization of human eyes; Threshold values; Face recognition