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。
Those salient regions are represented by 3 invariant features of gradient orientation, moment and canonical hue. They are used for scene recognition in terms of their match ratio.
对场景图像中的显著区域采用梯度方向、二阶不变矩、归一化色调3种特征进行不变性表示，并根据其匹配率实现场景识别。
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。
First, a method to estimate the local image gradient, called the BEG (best estimation of gradient) algorithm was proposed to extract the texture orientation parameters.
首先提出了局部图像的梯度估计方法，称之为BEG(梯度的最佳估计)算法，用来提取图像的纹理方向特征参数。
The ES is calculated by normalizing the summation of orientation gradient.
支持度的计算采用了标准化方向梯度强度和的形式。
In this paper, some works were done to optimize the properties of BST thin films, including the annealing temperature, orientation and composition gradient.
本文通过对退火温度、择优取向、组分梯度的研究，对钛酸锶钡(BST)薄膜进行了性能优化。
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。
方向梯度；
方向梯度；
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