作者：曹彪, 刘奇

作者单位：四川大学电气信息学院, 四川 成都 610065

关键词：分割; 全变差; 数学形态学; 水平集

摘要：

针对噪声严重的超声图像,提出了一种结合数学形态学和Level Set的分割方法。首先采用全变差模型进行图像滤波,再通过交互式区域选择和数学形态学方法获得感兴趣目标的二值化图像,并把该二值化图像轮廓作为水平集方法的初始曲线。改进隐式测地活动轮廓模型(GAC)中的边缘检测函数,增强了处理弱边缘的能力。分割结果表明,该方法能够准确地提取出目标轮廓,同时减少了迭代次数和运算时间。

Ultrasound image segmentation method based on mathematical morphology and Level Set

CAO Biao, LIU Qi

School of Electrical Information, Sichuan University, Chengdu 610065, China

Abstract: A segmentation method based on mathematical morphology and level set was proposed for ultrasound images.First,the total variation model was utilized to filter the noisy ultrasound image,then the alternate region choosing and mathematical morphology method were used to obtain the binary image of the interesting object.The binary image was used as the initial curve of the level set method.The edge detection function of the implicit geodesic active contour model(GAC) was improved,and the weak edge detection was enhanced.The results show that the target contour can be accurately extracted.While the iterative and computation time is reduced.

Keywords: Segmentation; Total variation; Mathematical morphology; Level set

2007, 33(5): 114-117  收稿日期: 2007-3-17;收到修改稿日期: 2007-5-24

基金项目: 

作者简介: 曹彪(1982-),男,山西文水人,硕士研究生,研究方向:信号与信息处理。

参考文献

[1] Kass M, Witkin A, and Terzopoulos D. Snakes:active contour models[J].International Journal of Computer Vision, 1987, 1(4):321-331.
[2] V Caslles, F Catte, B. Coll, et al. A geometric model for active contours in image processing[J].Numeric Mathematic, 1993, 66(1):1-31.
[3] V Caselles, R Kimmel, and G Sapiro. Geodesic active contours[J].Computer visition, 1997, 22(1):61-79.
[4] Ravikanth Malladi, J A Sethian, Baba C Vemuri. Shape modeling with front propagation:a level set approach[J].IEEE Transactions on Pattern Analysis and Machine Intelligence, 1995, 17(2):158-175.
[5] Li Chun-ming, Xu Cheng-yang Gui Chanfeng, et al. Level set evolution without Re-initialization:a new variation formulation[J].Computer Vision and Patten Recognition, 2005, 1:430-436.
[6] Rudin L, Osher S, Fatemi E. Nonlinear total variation bassed noise removel algorithms[J].Physisca.D, 1992, 60:259-268.
[7] Tony F. Chan. The digital TV filter and nonlinear denoising[J].IEEE Transaction on Image Processing, 2001, 10(2):231-241.
[8] 陈胜, 杨新, 等.多网格法解总变分问题及在医学图像增强中的应用[J]. 中国图象图形学报, 2004, 7:787-792.
[9] Osher S, J A Sethian. Fronts propagating with curvature dependent speed:algorithms based on Hamilton-Jacobin for mutations[J].Journal of Computational Physics, 1988, 79:12-49.
[10] Tony F. Chan, Laminate A., Vese. Active contours without edges[J]. IEEE Transaction on Image Processing, 2001, 10(2); 266-277.