To determine the keypoint orientation, a gradient orientation histogram is computed in the neighbourhood of the keypoint.
为了定位特征值的指向，会使用到一个计算出的周围特征值的变换指向直方图来表示。
Feature space imitates the model of biological complex neurons in primary visual cortex, and it is constructed through orientation histogram in feature's local area.
特征空间则模仿了灵长类动物的视觉神经元模型，以区域图像梯度直方图的方式建立。
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。
Recently, methods basing on histogram of orientation gradient are proved to be good for human detection.
在人体检测技术当中，梯度方向直方图是近年来被证明比较好的一种方法。
Recently, methods basing on histogram of orientation gradient are proved to be good for human detection.
在人体检测技术当中，梯度方向直方图是近年来被证明比较好的一种方法。
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