CAJ | 학술논문

利用最小作用曲面提取狭长的管状器官轮廓时,常常出现边界泄露问题.为此提出一种基于传递波(演化曲线或曲面)的平均能量准则来控制传递波传递.将处于尾部、能量低于平均能量的传递波"冻结",仅让具有较大能量,处于首部的传递波继续传递,最终提取管状器官的整个轮廓.运用基于该准则的Fast Marching算法快速有效地提取出结肠轮廓.该准则结合传递波的全局能量信息,对图像的噪声及低对比度有鲁棒性.
이용최소작용곡면제취협장적관상기관륜곽시,상상출현변계설로문제.위차제출일충기우전체파(연화곡선혹곡면)적평균능량준칙래공제전체파전체.장처우미부、능량저우평균능량적전체파"동결",부양구유교대능량,처우수부적전체파계속전체,최종제취관상기관적정개륜곽.운용기우해준칙적Fast Marching산법쾌속유효지제취출결장륜곽.해준칙결합전체파적전국능량신식,대도상적조성급저대비도유로봉성.
When the tubular structures surfaces are extracted by the minimal action surface,edges leakage problem could not avoided.So a front propagation freezing criterion is developed based on the average energy of the front propagation.Freeze the "tail" of the front and its energy less than the average energy of the whole front propagation,and continue propagate the "head' of the front and its energy larger than the average energy of the whole front propagation.While the "head" front gets the end of the objects,the whole surfaces of the object are extracted.Experimental results show the freezing criterion of fast marching method avoids the edges leakage problem effectively .The criterion is based on the global optimum, so can enhance the robustness to the noise and low contrast medical images.