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| 基于DTCWT方向信息的超声图像斑点噪声消除 | |
| 引用本文： | 许慰玲,沈民奋,杨金耀.基于DTCWT方向信息的超声图像斑点噪声消除[J].数据采集与处理,2011,26(6):671-675. |
| 作者姓名： | 许慰玲 沈民奋 杨金耀 |
| 作者单位： | 1. 仲恺农业工程学院信息学院,广州,510225 2. 汕头大学广东省数字信号与图像处理技术重点实验室,汕头,515063 3. 汕头市超声仪器研究所有限公司,汕头,515041 |
| 基金项目： | 国家自然科学基金(61072037)资助项目; 广东省科技厅科技计划(2010B060900111)资助项目 |
| 摘 要： | 针对一般的小波去噪方法在去除超声图像斑点噪声时不能有效保持图像边缘信息的问题,本文提出基于双树复小波变换(Dual tree complex wavelet transform,DTCWT)方向信息的超声图像斑点噪声消除算法.利用双树复小波变换6个方向复小波系数的相对方差来确定该点是否位于边缘或纹理上,对低于门限的像素... |
| 关 键 词： | 超声图像 斑点噪声 双树复小波变换 边缘方向 自适应滤波 |
Speckle Reduction for Ultrasound Image Using Edge Directions in DTCWT Domain |
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| Xu Weiling,Shen Minfen,Yang Jinyao.Speckle Reduction for Ultrasound Image Using Edge Directions in DTCWT Domain[J].Journal of Data Acquisition & Processing,2011,26(6):671-675. | |
| Authors: | Xu Weiling Shen Minfen Yang Jinyao |
| Affiliation: | Xu Weiling1,Shen Minfen2,Yang Jinyao3(1.Information College,Zhongkai University of Agriculture and Engineering,Guangzhou,510225,China,2.Guangdong Provincial Key Laboratory of Digital Signal and Image Processing Technology,Shantou University,Shantou,515063,3.Shantou Institute of Ultrasonic Instruments,515041,China) |
| Abstract: | In general,the edge information of an image can not be effectively preserved when traditional wavelet de-noising methods are adopted to reduce the speckle in ultrasound images.In view of this problem,a novel speckle reducing algorithm for ultrasound images is proposed based on the dual tree complex wavelet transform(DD-DTCWT) direction information.The relative variance of the six directional complex detail coefficients about DTCWT is used to determine whether points are located at the edges or in the textur... |
| Keywords: | ultrasound image speckle dual tree complex wavelet transform edge direction adaptive de-noising |
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