基于小波域MRF模型的SAR图像分割  

SAR image segmentation using MRF model in wavelet domain

作　　者：曹兰英[1] 夏良正[1] 张昆辉[2] 

机构地区：[1]东南大学自动控制系,南京210096 [2]中国雷华电子技术研究所,无锡214063

出　　处：《东南大学学报（自然科学版）》2004年第6期847-850,共4页Journal of Southeast University：Natural Science Edition

摘　　要：针对存在严重斑点噪声的合成孔径雷达 (SAR)图像的分割问题 ,提出了一种基于小波域马尔科夫随机场 (MRF)模型的算法 .该算法综合利用了隐含马尔科夫树的相关邻域信息和图像的多分辨率描述的信息 ,将期望最大化用于先验概率分布参数的估计 ,采用最大后验准则来进行图像的分割 .通过对SAR图像的分割实验表明 ,该算法可有效去除斑点噪声的影响 ,并能在准确分割目标的同时保留目标的细节信息 .To solve the problem of synthetic aperture radar (SAR) image segmentation with multiplicative nature of the speckle. An SAR image segmentation algorithm using Markov random field (MRF) model in wavelet domain is proposed, in which the information of adjacent pixels of hidden Markov tree (HMT) and the information of multi-scale described images are combined. The expectation-maximization (EM) method is used for estimation of pre-probability; the maximum a posteriori (MAP) is used for segmentation of images. Simulation shows that this algorithm can avoid the influence of speckle and achieve an accurate segmentation with detail information of the targets.

关 键 词：SAR图像 MRF模型 小波变换 图像分割 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]