对数域的光学相干层析图像噪声模型分析

纪文; 孙水发; 王帅; 董方敏

doi:10.7510/jgjs.issn.1001-3806.2014.06.027

对数域的光学相干层析图像噪声模型分析

1.
三峡大学智能视觉与图像信息研究所, 宜昌 443002

作者简介: 纪文(1989-),男,硕士研究生,现主要从事医学图像处理的研究。.

通讯作者: 孙水发, watersun@ctgu.edu.cn ;

基金项目:
国家自然科学基金资助项目(61272237;61272236)
中图分类号: TP391.4

Analysis of noise model of optical coherence tomography image in logarithmic domain

1.
Institute of Intelligent Vision and Image Information, Three Gorges University, Yichang 443002, China

Corresponding author: SUN Shuifa, watersun@ctgu.edu.cn ;

CLC number: TP391.4

摘要: 为了分析光学相干层析成像技术(OCT)的图像对数变换前后的斑点噪声分布模型,为图像去噪及其它图像处理过程提供参考,采用了先推导斑点噪声理论分布模型,再通过实验数据验证的方法。首先分析了对数变换前斑点噪声的统计特性,利用数学理论推导得到斑点噪声对数变换后的理论分布模型,然后用OCT心血管图像的平滑区域作为噪声的试验数据,得到变换前后斑点噪声的直方图分布数据,最后用理论分布模型对试验数据进行曲线拟合,取得了确定系数、均方根差和卡方检测的评价数据。结果表明,对数变换后斑点噪声分布符合Fisher-Tippett分布。这一结果对OCT图像去噪等处理过程是有帮助的。
- 图像处理 /
- 噪声模型 /
- 对数变换 /
- 光学相干层析图像 /
- 斑点噪声
Abstract: In order to analyze the speckle noise distribution model of optical coherence tomography (OCT) images before and after logarithm transformation and provide references for image de-noising and other image processing, theoretical distribution model of the speckle noise was deduced firstly and then was verified by experimental results. First of all, the statistical properties of the speckle noise before the logarithm transformation were analyzed. The distribution model of the speckle noise after logarithm transform was derived through the mathematical theory. Then, the smooth regions of cardiovascular OCT images were selected as the experimental data to obtain the histogram distribution of the speckle noise before and after the logarithm transformation. Finally, the experimental data were fitted by the theoretical distribution model and the evaluated data, such as R-square, root mean square error and X-square tests. The results prove that the noise distribution after logarithm transformation presents Fisher-Tippett distribution. The results are helpful for the de-noising on OCT images.
- image processing /
- noise model /
- logarithm transformation /
- optical coherence tomography image /
- speckle noise

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对数域的光学相干层析图像噪声模型分析

作者简介: 纪文(1989-),男,硕士研究生,现主要从事医学图像处理的研究。.

通讯作者: 孙水发, watersun@ctgu.edu.cn ;

Analysis of noise model of optical coherence tomography image in logarithmic domain

Corresponding author: SUN Shuifa, watersun@ctgu.edu.cn ;

计量

对数域的光学相干层析图像噪声模型分析

通讯作者: 孙水发, watersun@ctgu.edu.cn;

作者简介: 纪文(1989-),男,硕士研究生,现主要从事医学图像处理的研究。

English Abstract

Analysis of noise model of optical coherence tomography image in logarithmic domain

Corresponding author: SUN Shuifa, watersun@ctgu.edu.cn

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对数域的光学相干层析图像噪声模型分析

作者简介: 纪文(1989-),男,硕士研究生,现主要从事医学图像处理的研究。.

通讯作者: 孙水发, watersun@ctgu.edu.cn ;

Analysis of noise model of optical coherence tomography image in logarithmic domain

Corresponding author: SUN Shuifa, watersun@ctgu.edu.cn ;

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对数域的光学相干层析图像噪声模型分析

通讯作者: 孙水发, watersun@ctgu.edu.cn;

作者简介: 纪文(1989-),男,硕士研究生,现主要从事医学图像处理的研究。

English Abstract

Analysis of noise model of optical coherence tomography image in logarithmic domain

Corresponding author: SUN Shuifa, watersun@ctgu.edu.cn

全文HTML

目录