一种改进的各向异性扩散超声图像去噪算法

王亚强; 陈波

doi:10.3788/YJYXS20153002.0310

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一种改进的各向异性扩散超声图像去噪算法

成像技术与图像处理 | 更新时间：2020-08-12

- 一种改进的各向异性扩散超声图像去噪算法
- Improved anisotropic diffusion ultrasound image denoising algorithm
- 液晶与显示 2015年30卷第2期页码：310-316
- 作者机构：
  
  西南科技大学计算机科学与技术学院,四川绵阳,621010
- 作者简介：
  
  [ "王亚强(1987-),男,河南平顶山人,硕士研究生,主要研究方向为医学图像处理,嵌入式技术。E-mail:wangyaqiang1314@163.com" ]
  [ "陈波(1963-),男,四川广汉人,教授,博士,主要研究方向为医学图像处理、嵌入式技术。" ]
- 基金信息：
  
  国家自然科学基金资助项目(No.61202044)();四川省科技创新苗子工程项目(No.20132022)()
- DOI：10.3788/YJYXS20153002.0310
  中图分类号： TP391.41
- 收稿日期：2014-04-28，
  
  修回日期：2014-06-03，
  
  网络出版日期：2014-06-09，
  
  纸质出版日期：2015-04-05
- 稿件说明：
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王亚强, 陈波. 一种改进的各向异性扩散超声图像去噪算法[J]. 液晶与显示, 2015,30(2): 310-316

WANG Ya-qiang, CHEN Bo. Improved anisotropic diffusion ultrasound image denoising algorithm[J]. , 2015,30(2): 310-316
王亚强, 陈波. 一种改进的各向异性扩散超声图像去噪算法[J]. 液晶与显示, 2015,30(2): 310-316 DOI： 10.3788/YJYXS20153002.0310.

WANG Ya-qiang, CHEN Bo. Improved anisotropic diffusion ultrasound image denoising algorithm[J]. , 2015,30(2): 310-316 DOI： 10.3788/YJYXS20153002.0310.

摘要

针对传统的各向异性扩散算法中扩散系数函数的平滑效果不好

扩散过程中扩散门限

的选取依靠经验确定

扩散过程对图像细节保护不足的问题

提出了一种改进的各向异性扩散算法。介绍了几种当前比较典型的各向异性扩散去噪算法;在典型算法分析的基础上提出了一种基于自适应中值滤波的改进扩散模型;根据扩散系数应满足的3个条件及经典的扩散系数函数

提出了改进的扩散模型中的改进扩散系数函数;提出了一种扩散门限

的自适应选取的方法。通过在改进的扩散模型中使用改进的扩散系数函数并结合扩散门限

的自适应选取

对超声图像进行去噪。实验结果表明

所提算法优于PM模型、Catte模型、王常虹算法等

去噪后图像的FOM值比PM模型高出3.34%

PSNR值比PM模型高出0.250 6。该算法在去除散斑噪声的同时有效保护了图像的细节及边缘

有助于医务人员对患病区域的准确诊断。

Abstract

In the traditional anisotropic diffusion algorithm

for the result of the smoothing effect of diffusion coefficient function is not good

the value of diffusion threshold

relying on the experience and the protection of image details is inadequate in the diffusion process. To solve above problems

an improved anisotropic diffusion algorithm is put forward. First

several current typical anisotropic diffusion denoising algorithms are introduced. Then

an improved diffusion model which based on adaptive median filtering is put forward on the basis of typical algorithm analysis. And then

an improved diffusion coefficient function in improved diffusion model is put forward according to three conditions which the diffusion coefficient function should satisfy and the classical diffusion coefficient function. Finally

a method of adaptive selection of the diffusion threshold

is put forward. The algorithm removes noise in ultrasound images by using the improved diffusion coefficient function in the modified diffusion model and combining adaptive selection of the diffusion threshold. The experimental results show that the proposed algorithm outperforms the PM model

Catte model

the Wang Changhong algorithm etc. The FOM value of the denoised image is 3.34% higher than that of the PM model and PSNR value is 0.250 6 higher than the PM model. The algorithm effectively removes speckle noise and at the same time protects image details and edges effectively and it contributes to accurate diagnose of the diseased area for medical personnel.

关键词

Keywords

references

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