Using random walker for knowledge transfer in classifying multi-temporal VHR images

被引:0
|
作者
Guo, Zhou [1 ]
Du, Shihong [1 ]
Zhao, Wenzhi [1 ]
机构
[1] Peking Univ, Inst Remote Sensing & GIS, Beijing 100871, Peoples R China
基金
中国国家自然科学基金;
关键词
REMOTE-SENSING DATA; LAND-COVER; ADAPTIVE CLASSIFICATION; MAXIMUM-LIKELIHOOD;
D O I
10.1080/2150704X.2015.1082208
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
Acquiring land cover types from very high resolution (VHR) images is of great significance to many applications and has been intensively studied for many years. The difficulties in image classification and the high frequencies of remote sensing image acquisition make it urgent to develop efficient knowledge transfer approaches for understanding multi-temporal VHR images. This letter proposed a knowledge transfer approach that uses the label information of the existing VHR images to classify multi-temporal images. The approach was implemented in three steps: object-based change detection, knowledge transfer of label information, and random walker (RW) classification. The proposed approach was tested by two datasets with each having two temporal images acquired on the same geographical areas. The experimental results showed that the proposed approach outperformed the support vector machine (SVM) algorithm in classifying multi-temporal images and can reduce the influence of spectral confusions on image classification.
引用
收藏
页码:4332 / 4343
页数:12
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