面积特征 meaning in Chinese

areal feature

A survey of character recognition methods is presented in chapter 3 . comparison of some extracted feature matching algorithms based on statistical pattern recognition is conducted . these features are profile , mesh and projection of micro structure for distinguishing similar characters
作者对车牌汉字识别的特征提取方法进行了研究，首先比较了多种基于统计模式识别的特征提取匹配算法，包括外围面积特征，网格特征和用于区分相似汉字的微结构投影特征。