Firstly, the local gray mean feature and local standard deviation feature were utilized to realize target modeling based on the low SNR characteristic of ir images.

首先，针对红外图像低信噪比的特点，采用局部灰度均值特征及局部标准差特征用于目标建模。

youdao

By computing the standard deviation of water depth, the area of unique terrain feature was chosen as the matching area.

通过计算不同区域的水深标准差，选择地形特征独特的区域作为适配区域。

youdao

By calculating the mean and standard deviation of image subbands decomposed by NSCT, the texture feature elements are extracted.

以nsct域各子带系数的均值和标准方差构成基本特征向量。

youdao