基于改进测地线模型的医学图像分割

Computer Engineering and Applications(2011)

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Abstract
提出了一种由测地线活动轮廓模型GAC(Geodesic Active Contour)和局部区域信息相结合的图像分割新方法LGAC(Local Geodesic Active Contour)。构造了基于图像局部信息的演化曲线符号压力函数和演化模型,用水平集方法演化实现,零水平集能准确地在目标边缘收敛,对目标背景对比度较低的图像的分割达到理想效果。利用高斯核函数对水平集函数平滑处理以维持演化稳定,节省了计算时间。实验结果证明了该方法的可行性。
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Key words
sign pressure function,Geodesic Active Contou(rGAC),level set,image segmentation
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