There are two methods about the arithmetic, one is retrieving wind-field using an optical flow based motion estimation technique; the other is retrieving wind direction by using local gradients and gaining wind speed by using Neural Network.
其算法分为两个,一个是基于光流运动估计技术的方法提取风场,另一个是利用局部梯度法提取风向和神经网络提取风速。
参考来源 - X波段雷达图像提取海面风场·2,447,543篇论文数据，部分数据来源于NoteExpress
除了局部不对称特征，局部梯度特征也是图像边缘的一种重要特征。
The local gradient features are also one kind of the important features of image edges.
提出了一种基于局部梯度强度和局部熵的红外小目标融合检测的方法。
A novel method based on gradient strength and local entropy for fusion detection of weak small targets with low contrast is presented in this paper.
根据局部梯度信息对源图像的小波低频系数进行选择，获取融合图像的对应低频系数。
According to local gradient information, wavelet low frequency coefficient obtained from source image is selected to compose respective low frequency coefficient of the fused image.
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