摘要
人脸识别是生物特征识别的重要组成部分,而人眼是人脸最突出的特征之一,眼睛定位成为人脸识别的关键环节。积分投影法是一种常用的人眼定位方法,但直接采用此方法进行人眼定位时,由于眉毛与眼睛距离较近,容易将眉毛的水平位置错误地判定为眼睛的水平位置,降低眼睛定位的准确率。所以,在人脸区域粗定位后,计算眼睛区域的水平积分投影时,增加了其在水平方向灰度变化频繁的特征,即差分投影法,最后将积分投影法与差分投影法相结合来实现人眼定位。该方法在ORL人脸库上经过测试,取得了约90.5%的定位准确率。实验结果表明,该方法可以更准确地定位人眼。
Face recognition is an important part of biometric identification. The eyes are one of the most prominent features of the face, and their localization is a key step of face recognition. Integral pro- jection is usually used for eyes localization, but the horizontal position of eyebrows is always mistaken for eyes ＇when we use this method directly. This can lead to accuracy reduction. So after roughly mark- ing out the area of face, we add the differential projection, namely, the gray value of the region that changes frequently in the horizontal direction, to the integral projection. The accurate position of eyes is defined by combining the integral projection and the differential projection. Experiments on the ORL face database show that the proposed method can get 90.5 % accurate positioning performance, thus lo- cating eyes more exactly.
出处
《计算机工程与科学》
CSCD
北大核心
2017年第3期534-539,共6页
Computer Engineering & Science
关键词
人眼定位
积分投影
差分投影
eyes localization
integral projection
differential projection
