Firstly, a gradient operator based on local standard deviation is performed and potential edge regions are well separated.
首先提出了一种基于标准差的梯度算子，将图像中潜在的边缘区域很好地区分出来；
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。
The algorithm adopts low pass filter to estimate the background and calculates the standard deviation to estimate the fluctuation of background to get the local adaptive detection threshold.
该算法以低通滤波算法估计背景中的低频成分，及图像局部方差估计背景起伏，来计算出局部自适应的目标检测判决门限。
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