| 改进的梯度向量流模型及其应用 |
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| 引用本文： | 封建湖,龚建良,蔡力.改进的梯度向量流模型及其应用[J].数值计算与计算机应用,2010,31(1):30-38. |
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| 作者姓名： | 封建湖 龚建良 蔡力 |
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| 作者单位： | 1. 长安大学理学院,西安,710064
2. 西北工业大学理学院,西安,710072 |
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| 摘 要： | 基于梯度向量流(GVF-Gradient Vector Flow)外力场的活动轮廓线模型的不足之处在于Snake曲线在窄带凹边界处收敛效果不好.通过在能量泛函的变分方程中引入两个以图像梯度为变量的函数来解决这个问题.改进的模型继承了GVF活动轮廓线模型的全部特性,同时提高了其在窄带凹边界处的收敛性,并加快了初始Snake曲线的收敛速度.多个算例说明了本文方法的有效性.
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| 关 键 词： | 梯度向量流 图像分割 边缘检测 活动轮廓线模型 |
IMPROVED GRADIENT VECTOR FLOW MODEL AND ITS APPLICATIONS |
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| Feng Jianhu,Gong Jianliang,Cai Li.IMPROVED GRADIENT VECTOR FLOW MODEL AND ITS APPLICATIONS[J].Journal on Numerical Methods and Computer Applications,2010,31(1):30-38. |
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| Authors: | Feng Jianhu Gong Jianliang Cai Li |
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| Affiliation: | Feng Jianhu Gong Jianliang (College of Science,Chang\'an University,Xi\'an 710064,China) Cai Li (School of Science,Northwestern Polytechnical University,Xi\'an 710072,China) |
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| Abstract: | When we compute the external force field in the active contour model based on the GVF field,there is one defection that the Snake curve is of poor convergence of thin concave boundary.In this article,we introduce two new functions based on the gradient vector in the energy variable function to generate a new GVF field.The improved GVF field can solve the above problem.As a result,the new model has all the characters of the GVF field active contour model.Simultaneously,the improved GVF field has improved the... |
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| Keywords: | gradient vector flow image segmentation edge detection active contourmodel |
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