An age group classification system for gray-scale facial images is proposed in this paper. Four age groups, including babies, young adults, middle-aged adults, and old adults, are used in the classification system.

openbr，是一个类似opencv的三方库，有强大的人脸识别，人脸性别分类，年龄估计等功能实现，需要的可以下载安装-Openbr, is a three parties of similar opencv library, has a strong face recognition, facial gender classification, age estimation function implementation, need to download and install

Human facial age estimation aims to automatically label a facial image with exact age or age group based on visual features derived from a facial image.