摘要
医学影像图像是一类拓扑纹理图像。在临床诊断和治疗中,常需要将不同模态的医学影像图像配准。为此提出一种结合拓扑纹理图像不变特征的医学影像光流场配准的方法。首先,以尺度不变特征变换(SIFT)描述子对待配准图像做局部特征描述,同时,以一致性提纯法对图像局部特征匹配对提纯;其次,以图像局部不变特征为参考,对图像进行基于光流场模型的弹性图像配准,同时,对配准模型予以单元分解,以避免图像局部拓扑纹理特征因被光滑而模糊配准的结果。仿真实验结果表明,新方法具有较好的医学影像图像配准效果。
Medical image is a kind of topological texture image. In clinical diagnosis and treatment, it is often needed to match medical images of different models. This paper put forward a medical imaging optical flow field registration method in conjunction with invariant features of topology texture image. Firstly, Scale Invariant Feature Transform (SIFT) descriptor was used to describe local characteristics of image registration and image registration on local imaging characteristics is refined by the eonsistency purification method. Secondly, the image was matched on the basis of elastic image registration of optical flow model by reference to the image local invariant features, and the registration model was decomposed by units to avoid blurred registered result and loss of local topological image texture features because of being smoothed. The result of simulation experiment indicates that the new method has better effect on medical image registration.
出处
《计算机应用》
CSCD
北大核心
2014年第A01期206-210,共5页
journal of Computer Applications
关键词
图像配准
局部特征
尺度不变特征转换
特征提取
光流场模型
image restoration
local feature
Scale Invariant Feature Transform (SIFT)
feature extraction
optical flowmodel
作者简介
通信作者电子邮箱yuwenyongl986@126.com 于文勇(1986-),男,山东青岛人,硕士研究生,主要研究方向:图像处理;
康晓东(1964-),男,天津人,教授,博士,主要研究方向:医学图像处理、医疗信息系统集成;
葛文杰(1994-),男,天津人,主要研究方向:电子信息;
郭宏(1974-),男,天津人,工程师。硕士,主要研究方向:软件工程;
王昊(1984-),男,河北保定人,工程师,硕士研究生,主要研究方向:图像处理;
耿佳佳(1988-),女,山西l临汾人,硕士研究生,主要研究方向:图像处理。