MSTAR图像2D Gabor滤波增强与自适应阈值分割  

2D Gabor Filter Enhancing and Adaptive Thresholding for MSTAR Image

作　　者：倪维平[1] 严卫东[1] 吴俊政[1] 芦颖[1] 郑刚[1] 马心璐[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《光电工程》2013年第3期87-93,共7页Opto-Electronic Engineering

摘　　要：为实现MSTAR图像无监督分割,并提高分割精度和计算效率,提出了一种基于Gabor滤波增强的自适应阈值分割算法。首先利用多尺度、多方向的Gabor滤波器组对待分割图像进行滤波处理,抑制目标、阴影和背景区域内部的斑噪起伏,同时增强区域间的差异性;在此基础上,通过对增强图像统计特性的分析,给出了灰度阈值计算形式,实现了MSTAR图像的自适应分割。实验结果表明,本文算法对不同斑噪强度的MSTAR图像均具有良好的处理效果,在分割精度、计算效率等方面优于传统的OTSU,以及FCM、MRF等分割方法。Image segmentation is a hot point in the research field of automatic target recognition of SAR image. In order to segment the MSTAR image automatically, a new adaptive method is proposed. Firstly, 2D Gabor filters with various orientations and scales are used to enhance the original image, which can effectually reduce speckle noise in the background, and smooth the interior of the homogeneous regions. Then the analysis of the statistical characteristics of the enhanced image is made, based on which the adaptive thresholding rules is presented for the automatically segmentation of the images. Experiment results with the MSTAR images indicate that the algorithm presented has advantage of segmentation accuracy, calculation efficiency and noise robustness over the traditional methods, such as OTSU, FCM and MRF

关 键 词：GABOR滤波器组 图像增强 MSTAR图像 自适应阈值分割 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]