feature sample extracting

• 特征样本提取

feature sample extracting的用法和样例：

例句

1. Firstly, the combined feature of the unknown target is compared with the samples of the training sample space in the NNFC, and a feature difference matrix is obtained.
   该分类器首先把待识别目标的组合特征与训练模板中的组合特征样本一一进行比较，从而得到了一个特征差矩阵。