The edge gradient and direction information are obtained by edge detection of remote sensing.
首先对遥感图像进行边缘检测以获取图像中每个像素的边缘梯度和方向信息；
According to features of edge gradient maps of face images, a new eye feature extraction algorithm based on gradient vector flow field was proposed.
根据人脸图像的边缘梯度图提出了一种新的基于梯度向量流场的眼睛特征提取方法。
Gravity gradient tensor; Forward; Edge extraction.
重力张量梯度；正演；边界提取。
Based on different properties of the coefficient modulus of the signal in different scale wavelet transform, conjunction the best estimate of gradient algorithm an edge detecting method is proposed.
基于信号在不同尺度下小波变换系数模不同的变化特征，结合最优梯度估计算法提出了一种边缘检测方法。
This algorithm has combined the gradient mapping of binary edge image and the potential distribution of people's facial characteristics.
该算法将二值边缘图像的梯度映射和人的面部特征的潜在分布规律相结合。
Using the non-maximal suppression method, the edge map is obtained by confirming the gradient map of the scale multiplication.
通过确定尺度相乘后的梯度图像，采用非最大值抑制方法得到边缘图像。
An edge detecting method for digital image is proposed using direction information of the gradient to thin off the differential image and defining a measuring function to link the edge points.
本文提出了一种利用梯度的方向信息，对微分图象进行细化，并确定一测量函数进行边缘点连接，以实现图象边缘检测的方法。
And the corresponding relationship between crustal deformation and earthquake is researched, the earthquake oc curred in high gradient belt along the edge of vertical deformation upward district.
研究了垂直形变异常与地震的对应关系，地震发生在垂直形变隆起区的边缘形变高梯度带上。
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；
The system of automatic boundary data acquisition can obtain the curve data of the endocardium boundary of left ventricle with the tracing algorithm of the gradient image edge.
自动边界数据采集系统是用梯度边缘追踪法自动获取左室内膜边界的曲线点，使用三次曲线插值法及最小二乘法拟合整条左室边界曲线。
In addition, gradient direction constraint of edge point was introduced. Matching algorithm based on aforementioned constraints was proposed.
此外还介绍了边缘点的梯度方向约束，给出了基于以上约束条件的边缘线匹配算法。
Secondly, for the image edge detection, methods including the gradient method, the sharp-processing method, and the Hough transformation were used, and the contour tracing was also conducted.
边缘检测处理部分采用了梯度处理法、锐化处理法、哈夫变换处理法，并对图像作轮廓跟踪处理。
Because the serious noise of coherent speckle exists in the SAR imagery, some people believe that edge extraction using gradient for SAR imagery gives poor results.
但由于在合成孔径雷达图像中存在严重的相干斑噪声，有人认为使用灰度梯度提取合成孔径雷达图像的灰度边界得不到好的结果。
The edge preservation is to preserve the gradient of edge areas.
边缘保持是保持边缘区域的梯度；
Then, mutual recognition about the peaks of BGH between neighboring blocks is implemented so that the edge is not sensitive to the gradient intensity.
然后，通过相邻块内部的梯度峰值的互确认操作，得到对梯度强弱不敏感的边缘，从而能够获得图像中更多的特征信息。
Use the Free Transform Tool (with Warp) to bend the light so that it gets thinner towards the left edge of the image. Use the Gradient Tool (black to transparent) to fade the effect.
使用自由变换工具(弯曲)来弯曲光线，使其在图像的左边缘更薄。使用渐变工具(黑色至透明)完成褪色效果。
These operators make use of gradient and the mean value of the image gray to minimize noise effect, but ignore to harness the image edge.
这些算子使用梯度和梯度的平均值来达到去噪和边沿检测，但忽略了增强图像边沿。
We use gradient algorithm to enhance cell borders in improving the edge detection algorithm. We achieve a better result through application adaptation threshold algorithm and mathematical morphology.
在改进的边缘检测算法中，本文运用梯度算法对图像进行边缘增强，然后应用最佳阈值算法与形态学方法，取得较好的分割效果。
The restored image obtained by using the space domain conjugate gradient algorithm is too smooth and loses some information about the edge detail.
基于空间域共轭梯度算法的盲目图像复原方法由于在复原过程中追求了充分平滑，使得复原图像中的边缘细节信息有所损失。
Gradient based edge detection methods are mainly focus on step edges.
基于梯度的边缘检测算法，主要是针对阶跃形边缘的检测。
That is used to convert a gradient edge image into a binary edge image.
用于梯度边缘图像转换成一个二进制图像边缘。
The main contributions of this thesis are as follows:(1) An edge feature detection model based on gradient and phase (GP model) is proposed.
本文的主要贡献如下：（1）提出了梯度和相位信息相结合的边缘特征检测模型—GP模型。
Velocity gradient, pressure gradient and circulation gradient are used to model the separated vortex flow field over a leading edge delta wing.
用速度梯度、压力梯度和环量梯度模拟大攻角尖前缘三角翼流场。
Ore zones occur in the edge of local positive gravity anomaly, in the strike interrupted area or steep gradient area of regional aeromagnetic anomaly.
而且矿区、矿化集中区还位于反映深部构造变异的局部重力异常区边缘、区域航磁走向中断区或梯度变化带附近。
Propose an improved algorithm, which uses the gradient-sorting estimation to preserve the edge, the results of experiments have shown the improved one i.
利用梯度排序来保持图像内部的边缘，实验结果也表明改进后的修复结果要优于原算法。
Based on the gradient histogram, the double thresholds can be found. At last, non-maximum suppression based on double thresholds is used to detect the edge.
通过基于梯度直方图来选取双阈值，最后进行基于双阈值的非极大值抑制，得到边缘检测的图像。
Morphological gradient is a nonlinear edge detector that can overcome the some drawbacks of the linear edge detector. Wide edges detected by morphological gradient cause the low edge resolution.
数学形态学边缘检测器能克服线性边缘检测器的一些缺点，但是存在宽边缘，导致边缘分辨率较低。
Objective To put forward an improved gradient vector flow (GVF) snake model based on the edge flow for segmentation of medical ultrasonic images of the lymph node.
目的提出一种基于边缘流的梯度矢量流（gradientvectorflow，GVF）形变模型的图像分割方法，并用于淋巴结超声图像的分割。
It is found that the temperature gradient of solidifying front edge could be reduced by reducing focused lamp intensity and increasing substrate temperature.
发现适当降低聚焦加热灯强度、提高衬底加热温度可以降低固化前沿温度梯度，从而降低亚晶界等缺陷密度。
For example, you can use a horizontal gradient to fill a shape with color that changes gradually as you move from the left edge of the shape to the right edge.
例如，您可以使用水平渐层，以随著您从形状左边缘移动到右边缘时逐渐变更的色彩来填满形状。
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