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- multiscale gradient vector field 多尺度梯度矢量场
- Study of Application for Visualization Based on Discrete Gradient Vector Fields 一种基于离散梯度向量域的可视化应用研究
- gradient vector field 梯度矢量流
- Therefore,according to features of the contours in fabric drape images,an active contour model(Snakes model)based on the gradient vector flow(GVF) field is proposed to recognize the edges of fabrics. 根据织物悬垂图像的边缘轮廓特点,提出采用基于梯度向量流场(GVF)的动态轮廓模型(Snake模型)来识别织物的边缘轮廓。
- Objective To promote stability and accuracy of gradient vector flow (GVF) deformable models by improving external potential force field of ultrasound images under speckle noisy environments. 结果通过二值加噪图像和心脏超声图像的实验,验证了该方法的捕捉范围和处理噪声方面优于GVF。
- According to the characteristics of these systems, gradient vector flow (GVF) field links segmentation, extraction of skeleton, and registration for speeding the system processing. 根据这些系统的特点，本文提出以梯度矢量流(GVF)场为主线，连贯医学图像的分割，骨架提取和配准等算法，这样做的目的主要是加快系统的处理速度。
- We discuss several different definitions of directional derivative and gradient vector. 摘要讨论了几种不同的方向导数和梯度的定义。
- So the gradient threshold and the Gradient Vector Flow(GVF) were introduced into the speed stopping function. 针对传统水平集分割图像会出现演化曲线停止于梯度的局部极大值或孤立的边缘处的缺点,对速度停止项进行了改进。
- So the gradient threshold and the Gradient Vector Flow (GVF) were introduced into the speed stopping function. 该方法将梯度阈值和梯度矢量流引入速度停止项中，利用梯度阈值来使边缘得到更好的保持；
- In the case of a vector field causing a particular term in the SME equations, the orientation coincides with the direction of the vector field. 若向量场造成SME方程式中一个特别项，则时空的方向会与向量场的方向一致。
- The guidance vector field can be procedurally generated, or computed from 3D medical images. 方向场可由过程式方法生成，也可由三维医学数据处理而得。
- A new ellipse extraction algorithm based on the ellipse-special deformable templates and gradient vector flow (GVF) was proposed. 摘要给出一种结合梯度矢量流(GVF)及椭圆变形模板的椭圆提取新算法。
- EOF, EOF procedures, principal component analysis procedure, suitable for vector field orthogonal decomposition. 经验正交函数，EOF程序，主成分分析程序，适合做向量场的正交分解。
- Directional snake can improve the detecting capability by charactering image features not only using gradient but also using the directional information of gradient vector. 方向蛇模型的优点是在模型中不仅运用图像的梯度特性,还充分运用梯度的方向特性,从而提高了图像分割的准确性。
- The electric current density vector field also satisfies superposition principle, some applications thereof are introduced. 摘要电流密度矢量场也满足叠加原理，给出了一些应用电流密度场叠加原理的例子。
- Gravitational field is a kind of vector field, and the description of gravitational force by general relativity is very effective. 引力场是一种矢量场，广义相对论对引力问题的描述是非常有效的。
- First, an arbitrary timelike vector field can be interpreted as defining the world lines of some family of (possibly noninertial) ideal observers. 然而，爱因斯坦场方程式对于一时空模型中，物质或非重力力场的哪些状态是被许可的并不太拣选。
- First, base surface is separated from geometric details by using the Poisson equation and a displacement vector field is obtained. 首先利用低通滤波和泊松方程对源曲面上特征区域进行基面与细节特征的分离操作，求得基面与特征之间的偏移矢量场；
- The results showed that the distribution of the precipitable water field was different from the vector field of water vapor flux . 结果表明,可降水量场 与水汽通量矢量场的分布不一致，水汽源地中以北海的水汽输送贡献最大；
- In this paper, a comprehensive simulation of the vector field imaging based on the inter-molecular multiple quantum coherences (iMQC) was performed. 摘要对基于分子间多量子相干的矢量场成像进行了系统的模拟研究。
