平均脸是一个整容专业词汇，指经过计算机技术处理得到的某一群体的合成性容貌。长着平均脸的一群人在很大程度上有着相似的相貌，使出现撞脸的机会大大增加。
他用20张不同的图片做了一张自己“平均脸”照片。
He made an "average face" image of himself using 20 different images.
该文提出了一种基于二维pca的类内平均脸方法进行人脸的特征提取。
In this paper, a method based on within-class average faces of two-dimensional PCA is proposed for face feature extraction.
许多著书者称平均脸不同于迷人脸，而迷人脸间的差异很大程度上取决于人种。
Many authors have reported that the average faces are different from attractive faces and that attractive faces differ considerably according to race.
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