ICE超声图像斑点噪声的统计分析
Statistical analysis of speckle noise in ICE ultrasound imaging
李轶鹏 1黄春明 1黄超 1李睿1
作者信息
- 1. 江西省电力科学研究院,江西南昌330096
- 折叠
摘要
通过基于三次样条曲线的弹性图像配准方法对ICE (Intracardiac Echocardiographic)图像进行配准后提取对数斑点噪声并对其进行统计分析.该图像配准方法是使用基于斑点噪声统计特性的最大似然方法建立目标函数并进行最小化,然后再重构运动场函数并进而在所有像素点提取对数斑点噪声差异值.计算结果表明在图像不同区域噪声的统计特性呈现明显有区别的空间特征.
Abstract
Statistical properties of log-speckle noise in ICE (Intracardiac Echocardiographic) ultrasound images are analyzed after extraction by an elastic image registration method based on cubic B-spline.The image registration is achieved by minimizing a cost functional constructed by stochastic modeling of speckle noise based on maximum likelihood method.Then the deformation is reconstructed to extract estimates of the log-speckle disparities at all pixels.Numerical results show the noticeable spatial modulations across the various regions of the ICE images.
关键词
斑点噪声/图像配准/三次样条曲线Key words
speckle noise/image registration/cubic B-spline引用本文复制引用
出版年
2013
NETL
NSTL
维普
万方数据