梯度矢量流模型,gradient vector flow model
1)gradient vector flow model梯度矢量流模型
2)gradient vector flow(GVF) snake梯度矢量流Snake模型
3)gradient vector flow (GVF)梯度矢量流
1.A novel scheme for the contour detection is proposed based on gradient vector flow (GVF) snakes and multiscale analysis.本文提出了一种基于梯度矢量流(GVF)snake与多尺度分析的轮廓提取新方法。
2.Combining Gradient Vector Flow (GVF) Snake model with graph cuts theory, a fast concave object extraction algorithm was proposed.首先用图割算法对初始轮廓线迭代变形,使其在快速提取非凹型段目标边界的同时将轮廓线有效地置于梯度矢量流力场的"有效逼近域"内,然后用GVF Snake算法继续对轮廓线迭代变形,提取凹型段目标边界。
英文短句/例句

1.B-Spline Curve Fitting Based on Gradient Vector Flow Deformable Models基于梯度矢量流变形轮廓的B样条曲线拟合
2.Medical Image Segmentation Based on Dynamic Directional Vector Flow Snake Model基于动态方向梯度矢量流蛇模型的图像分割
3.Gradient Vector Flow Geodesic Active Contour Model Aided Region Force辅以区域力量的梯度矢量流测地线活动轮廓模型
4.Wavelet-based Multiscale DDGVF Snake Model for Cardiac Magnetic Resonance Images Segmentation小波多尺度动态方向梯度矢量流与心脏核磁共振图像分割
5.Iterative Gradient Vector Flow (IGVF) Method and Its Application in Medical Image Segmentation;迭代梯度矢量流方法及其在医学图像分割中的应用
6.Medical Image Segmentation Using GVF Deformable Models;梯度矢量流(GVF)变形模型在医学图像分割中的应用
7.Image Segmentation Based on Improved Dynamic Directional Vector Flow Snake Model基于改进的动态方向梯度矢量流蛇模型的图像分割
8.Application of convective and moist vorticity vectors in the analysis of a heavy rainfall event对流涡度矢量和湿涡度矢量在暴雨诊断分析中的应用研究
9.THE RELATIVASTIC TRANSFORMATION OF ENERGYFLOW DENSITY VECTOR AND ENERGY DENSITYOF ELECTROMAGNETIC FIELD电磁场能流密度矢量与能量密度的相对论变换
10.Strain Gradient Plasticity Theory Based on Taylor Dislocation Model with Non-classical Vector-like Stress;考虑Taylor位错模型的含非经典应力矢量的应变梯度塑性理论
11.To Define the Relation between Contour Surface and Gradi雗t in Vector Field through Experiment;利用实验方法确定矢量场中等值面与梯度的关系
12.It shows three different approaches to airborne gravimetry, namely scalar gravimetry, vector gravimetry and gravity gradiometry.航空重力测量可分为航空标量重力测量、航空矢量重力测量和航空梯度重力测量。
13.Probability Current DensityIs a Constant vector in the Penetration of a Rectangular Potential Barrier;概率流密度矢量是方形势垒穿透中之守恒量
14.Image Segmentation Method Based on GVF Snake Model基于梯度向量流模型的图像分割方法
15.Conditions Where Magnetic Field Intensity Vector Relates Only to Conduct Electricity;磁场强度矢量仅与传导电流有关的条件
16.Experiments of discharge coefficient of film cooling holes under adverse pressure gradient主流逆压力梯度下气膜孔流量系数的实验
17.For this reason,the authors propose a method to detect fingerprint features directly fr om the fingerprint gradient orientations.为此,提出一种直接按指纹梯度矢量的方向图进行指纹特征检出的算法。
18.Vector Magnetic Field Measurements of Sunspots and Calculation of Longitudinal Current Density;太阳黑子矢量磁场的测量及视向电流密度的计算
相关短句/例句

gradient vector flow(GVF) snake梯度矢量流Snake模型
3)gradient vector flow (GVF)梯度矢量流
1.A novel scheme for the contour detection is proposed based on gradient vector flow (GVF) snakes and multiscale analysis.本文提出了一种基于梯度矢量流(GVF)snake与多尺度分析的轮廓提取新方法。
2.Combining Gradient Vector Flow (GVF) Snake model with graph cuts theory, a fast concave object extraction algorithm was proposed.首先用图割算法对初始轮廓线迭代变形,使其在快速提取非凹型段目标边界的同时将轮廓线有效地置于梯度矢量流力场的"有效逼近域"内,然后用GVF Snake算法继续对轮廓线迭代变形,提取凹型段目标边界。
4)GVF梯度矢量流
1.Methods Traditional gradient force, gradient plus pressure force and gradient vector flow (GVF) force were used in active contour models to segment malleus, incus, eardrum and some shared surface images.方法将传统的梯度外力、梯度加压力及梯度矢量流外力应用于主动轮廓模型,分别对砧骨、锤骨、砧骨和锤骨间的共享狭窄面及鼓膜等图像进行图像分割,比较图像分割的结果,选择收敛速度快、分割结果准确的方法。
2.We presented a novel and fast convergent skeleton snake model based on gradient vector flow(GVF).提出了一种基于梯度矢量流 (GVF)的快速收敛骨架snake算法。
3.Objective: To investigate the potential of gradient vector flow(GVF) Snake model as a method of image segment in radiographic absorptiometry method(RA) which is used to qualify bone mineral density.结果:实验表明梯度矢量流模型有较好的鲁棒性和实用性,分割结果与实际边界非常吻合。
5)gradient vector flow梯度矢量流
1.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。
2.A brain segmentation algorithm for human head Magnetic Resonance Images(MRI)was proposed,which was based on gradient vector flow(GVF)deformable models and effectively dressed the problem of weak convergence at abrupt corners in GVF method.本文给出了一种人头部核磁共振MRI图像的脑区域分割算法,该算法基于梯度矢量流GVF的可变形模型方法,且有效地解决了该方法在轮廓的突变处存在的弱收敛问题。
3.The geodesic active contour aided with CV-GVF method is therefore proposed by way of combining the geodesic active contour with the coupling force field composed of gradient vector flow and CV method.针对经典的测地线活动轮廓对初始位置和噪声比较敏感,在有噪声干扰或初始位置距目标边缘较远时,其往往无法准确收敛到目标边缘的问题,通过将由梯度矢量流和CV方法构成的耦合力场与测地线活动轮廓相结合,提出了辅以CV-GVF方法的测地线活动轮廓模型。
6)gradient vector flow(GVF)梯度矢量流
1.A new method of contour initializaiton was proposed by analyzing the shortcomings of the huge waste of time and the failure of extracting some true contours in Gradient Vector Flow(GVF) Snake model.通过对梯度矢量流(GVF)力场迭代和轮廓收敛过程中时间开销大、不能逼近较复杂轮廓等不足之处的分析,提出了一种新的初始轮廓线的设置方法。
延伸阅读

原子的矢量模型  用矢量和矢量合成表示原子中电子角动量及其耦合的一种半经典的模型。它可用来确定给定电子组态的原子内部可能的运动状态。    原子中电子的轨道角动量、自旋角动量以及由自旋轨道耦合而成的角动量,都可以用一矢量PK来表示。矢量的方向平行于相应角动量方向,矢量长度正比于相应角动量大小。两个角动量P和P相互作用而耦合,其合成角动量矢量PJ的方向和大小由两角动量矢量P和P的矢量和决定,即PJ=P+P。鉴于量子力学对角动量大小和对空间特殊方向取向量子化要求,得                      式中K1、K2和J是相应角动量的量子数,,h为普朗克常数。角动量在空间特殊方向z轴上的分量为        其合成角动量在z轴上的分量为    原子内电子间角动量耦合应按LS 耦合或jj 耦合两种方式把相应角动量矢量按一定的次序合成。原子的矢量模型也适用于核角动量与电子角动量的耦合。由于核磁矩远比电子磁矩小,所以核角动量引起的能级分裂称为能级的超精细结构(见原子光谱的超精细结构)。原子的矢量模型对于用光谱研究原子结构十分有用。    参考书目   褚圣麟编:《原子物理学》,人民教育出版社,北京,1979。   H. E. White, Introduction to Atomic Spectra,McGraw-Hill,New York,1934.