一种基于 ROEWA 算子改进的 CV 模型用于乳腺超
声图像分割 |
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引用本文: | 刘 磊,温铁祥,秦文健,李 凌,辜 嘉.一种基于 ROEWA 算子改进的 CV 模型用于乳腺超
声图像分割[J].集成技术,2017,6(5):32-39. |
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作者姓名: | 刘 磊 温铁祥 秦文健 李 凌 辜 嘉 |
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作者单位: | 中国科学院深圳先进技术研究院 深圳518055 |
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基金项目: | 国家自然科学基金项目,深圳市基础研究项目 |
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摘 要: | 基于区域的几何活动轮廓(Chan-Vese,CV)模型是乳腺超声图像中常用的一种分割算法.但传统的CV模型不能满足乳腺超声图像分割精度高、速度快的要求.因此,文章提出了一种基于指数加权平均比率(Ratio of Exponential Weighted Averages,ROEWA)算子改进的CV模型,用于乳腺超声图像中病灶区域的分割.首先,计算乳腺超声图像的ROEWA算子.其次,基于图像的ROEWA算子构建边缘指示函数,用于代替CV模型中的Dirac项.最后,去除平滑项,从而提高曲线演化的速度.实验结果表明,文章提出的算法不仅能提高分割的精度,而且能显著提高分割的速度.
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关 键 词: | 乳腺肿瘤 超声图像 分割 活动轮廓模型 指数加权平均比率算子 |
收稿时间: | 2017/6/30 0:00:00 |
修稿时间: | 2017/8/24 0:00:00 |
Segmentation of Breast Ultrasound Image with an Improved CV Model
Based on ROEWA Operator |
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Authors: | LIU Lei WEN Tiexiang QIN Wenjian LI Ling and GU Jia |
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Abstract: | The Chan-Vese (CV) model has been widely investigated for breast ultrasound (BUS) image
segmentation. However, the traditional CV model can not meet the requirement of high precision and speed for
BUS segmentation. To address this issue, an improved CV model based on the ratio of exponentially weighted
averages (ROEWA) operator was proposed in this paper. Firstly, the ROEWA of the BUS image was calculated.
Then, a ROEWA-based edge indicator function was built to replace the Dirac term of traditional CV model.
Finally, the smoothing term was removed to improve the speed of curve evolution. Experimental results show that
the advantages of the proposed model in terms of computational efficiency and accuracy. |
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Keywords: | breast lesion ultrasound images segmentation active contour model ROEWA operator |
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