Hybrid two-stage active contour method with region and edge information for intensity inhomogeneous image segmentation

被引:39
|
作者
Soomro, Shafiullah [1 ]
Munir, Asad [1 ]
Choi, Kwang Nam [1 ]
机构
[1] Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea
来源
PLOS ONE | 2018年 / 13卷 / 01期
基金
新加坡国家研究基金会;
关键词
LEVEL SET METHOD; MODEL;
D O I
10.1371/journal.pone.0191827
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
This paper presents a novel two-stage image segmentation method using an edge scaled energy functional based on local and global information for intensity inhomogeneous image segmentation. In the first stage, we integrate global intensity term with a geodesic edge term, which produces a preliminary rough segmentation result. Thereafter, by taking final contour of the first stage as initial contour, we begin second stage segmentation process by integrating local intensity term with geodesic edge term to get final segmentation result. Due to the suitable initialization from the first stage, the second stage precisely achieves desirable segmentation result for inhomogeneous image segmentation. Two stage segmentation technique not only increases the accuracy but also eliminates the problem of initial contour existed in traditional local segmentation methods. The energy function of the proposed method uses both global and local terms incorporated with compacted geodesic edge term in an additive fashion which uses image gradient information to delineate obscured boundaries of objects inside an image. A Gaussian kernel is adapted for the regularization of the level set function and to avoid an expensive re-initialization. The experiments were carried out on synthetic and real images. Quantitative validations were performed on Multimodal Brain Tumor Image Segmentation Benchmark (BRATS) 2015 and PH2 skin lesion database. The visual and quantitative comparisons will demonstrate the efficiency of the proposed method.
引用
收藏
页数:20
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