gradient orientation histogram
...梯度方向直方图 ; 旋转不变性 ; 互信息 [gap=1207]Key words: image registration; major orientation; gradient orientation histogram; rotation invariance; mutual information ..
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A novel gradient orientation histogram was built using a Gaussian-weighted circular window and a major orientation to each feature point was assigned based on local image properties.
构建了一种新的局部梯度方向直方图，同时定义了特征点的主方向，从而提出了一种具有旋转不变性的图像配准算法。
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