基于相位一致性的遥感影像道路特征检测方法  

Road Feature Detection Based on Phase Congruency Using Remote Sensing Image

作　　者：韦春桃[1] 李彩露[1] 杨先武[2] 吴平[1] 

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]信阳师范学院城市与环境科学学院,河南信阳464002

出　　处：《地理与地理信息科学》2011年第4期62-66,共5页Geography and Geo-Information Science

基　　金：广西自然科学基金"基于频率域的遥感影像特征检测算法"(桂科自0728219);广西科学基金:广西区应用基础研究专项"工程建筑变形监测非线性融合变形分析与预报研究"(桂科基0991023);广西研究生教育创新计划项目(2010105960816M19)

摘　　要：在空间域中进行道路特征检测容易受图像亮度、对比度和噪声的影响,为了克服这一缺点,该文采用在频率域中进行道路特征检测。基于频率域的相位一致性道路特征检测方法具有亮度和对比度不变性,特征在频率域中表现出最大的相位一致性,通过计算影像6个方向的相位一致性值得到相位一致性值之和的灰度图,对灰度图进行二值化,然后使用数学形态学方法进行细化,去除噪声,检测出道路特征。实验表明,该方法对对比度、亮度变化不敏感,能够精确地检测出与人眼视觉相一致的道路特征。In spatial domain,the results of road feature detection are susceptible to the brightness and contrast of image.To overcome this shortcoming,the features in frequency domain have been detected in this paper.The phase congruency method which is based on frequency domain to detect feature has invariance to brightness and contrast,and features of image are shown to be the largest phase congruency in the frequency domain.The phase congruency value of six directions have been calculated,and then the sum of the six values are obtained,a fixed threshold has been set to get a binary image.The road can be detected by mathematical morphology,and the noise is also removed.Experiment results show that the method is not sensitive to the changes of brightness and contrast,and it can detect road feature accurately,and the features which are detected by phase congruency are consistent with human feature perception.

关 键 词：遥感影像 相位一致性 数学形态学 道路 特征检测 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]