全极化SAR图像边缘检测的随机距离法

doi:10.11947/j.AGCS.2015.20130810

测绘学报 ›› 2015, Vol. 44 ›› Issue (7): 753-760.doi: 10.11947/j.AGCS.2015.20130810

全极化SAR图像边缘检测的随机距离法

王庆, 曾琪明, 张海真, 焦健

北京大学遥感与地理信息系统研究所北京市空间信息集成与3S工程应用重点实验室, 北京 100871

收稿日期:2013-12-30 修回日期:2014-10-14 发布日期:2015-07-28
通讯作者: 曾琪明,E-mail:qmzeng@pku.edu.cn E-mail:qmzeng@pku.edu.cn
作者简介:王庆(1986-),男,博士,研究方向为极化SAR图像处理。E-mail:wangqing_rs@163.com
基金资助:
国家863计划(2012AA121304);国家自然科学基金(41171267)

Edge Detection of PolSAR Image Based on Stochastic Distance

WANG Qing, ZENG Qiming, ZHANG Haizhen, JIAO Jian

Key Laboratory of Spatial Information Integration and Applications of Beijing Municipality, Institute of Remote Sensing and GIS, Peking University, Beijing 100871, China

Received:2013-12-30 Revised:2014-10-14 Published:2015-07-28
Supported by:
The National High-tech Research and Development Program of China (863 Program) (No. 2012AA121304);The National Natural Science Foundation of China (No. 41171267)

摘要/Abstract

摘要：

提出了一种基于复Wishart分布随机距离的PolSAR图像边缘检测方法,将统计学中的随机距离理论引入PolSAR图像边缘检测中,依据的主要原理是边缘两侧类别之间随机距离的大小与边缘的方向和两侧类别差异的高度相关性。通过模拟数据对随机距离检测边缘的性能进行了全面分析,表明随机距离具有准确的边缘定向和定位能力。并利用基于复Wishart分布随机数生成器模拟的PolSAR图像和一景机载全极化SAR图像进行了验证。试验结果证实了该方法检测边缘的效果。

关键词: 随机距离, Wishart分布, PolSAR, 边缘检测

Abstract:

A new edge detection methodology in PolSAR images is proposed, which is based on stochastic distance in the statistical theory and combined with complex Wishart distribution. Its main principle is inspired from the phenomenon that stochastic distance of two classes separated by an edge is closely related to the edge direction and the contrast of two classes. Simulation experiments are carried out to analyze the performance of the proposed methods. Results prove that methods have better capabilities in edge orientation and edge positioning than common used methods. Then, the proposed detection procedure is tested on a simulated PolSAR image with the complex Wishart distribution, as well as an airborne fully polarimetric SAR image.

Key words: stochastic distance, Wishart distribution, PolSAR, edge detection

中图分类号:

P237

王庆, 曾琪明, 张海真, 焦健. 全极化SAR图像边缘检测的随机距离法[J]. 测绘学报, 2015, 44(7): 753-760.

WANG Qing, ZENG Qiming, ZHANG Haizhen, JIAO Jian. Edge Detection of PolSAR Image Based on Stochastic Distance[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(7): 753-760.

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全极化SAR图像边缘检测的随机距离法

Edge Detection of PolSAR Image Based on Stochastic Distance

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