scholarly journals Unsupervised Change Detection in Multitempolar SAR Images Based on Integration of Clustering and Active Contour Model

2017 ◽  
Vol 5 (1) ◽  
pp. 21-37 ◽  
Author(s):  
armin moghimi ◽  
safa Khazai ◽  
hamid ebadi ◽  
◽  
◽  
...  
Keyword(s):  
Change Detection ◽  
Active Contour ◽  
Active Contour Model ◽  
Sar Images ◽  
Contour Model

scholarly journals Change Detection in Synthetic Aperture Radar Images Based on Fuzzy Active Contour Models and Genetic Algorithms

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Jiao Shi ◽  
Jiaji Wu ◽  
Anand Paul ◽  
Licheng Jiao ◽  
Maoguo Gong
Keyword(s):  
Synthetic Aperture Radar ◽  
Change Detection ◽  
Active Contour ◽  
Active Contour Model ◽  
Synthetic Aperture ◽  
Difference Image ◽  
Radar Images ◽  
Contour Model ◽  
The Difference ◽  
Aperture Radar

This paper presents an unsupervised change detection approach for synthetic aperture radar images based on a fuzzy active contour model and a genetic algorithm. The aim is to partition the difference image which is generated from multitemporal satellite images into changed and unchanged regions. Fuzzy technique is an appropriate approach to analyze the difference image where regions are not always statistically homogeneous. Since interval type-2 fuzzy sets are well-suited for modeling various uncertainties in comparison to traditional fuzzy sets, they are combined with active contour methodology for properly modeling uncertainties in the difference image. The interval type-2 fuzzy active contour model is designed to provide preliminary analysis of the difference image by generating intermediate change detection masks. Each intermediate change detection mask has a cost value. A genetic algorithm is employed to find the final change detection mask with the minimum cost value by evolving the realization of intermediate change detection masks. Experimental results on real synthetic aperture radar images demonstrate that change detection results obtained by the improved fuzzy active contour model exhibits less error than previous approaches.

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