Image and Signal Processing Methods

Local incidence angle referenced classification on polarimetric synthetic aperture radar images in mountain glacier areas

[+] Author Affiliations
Lei Huang, Zhen Li, Bang-sen Tian

Chinese Academy of Sciences, Institute of Remote Sensing and Digital Earth, Haidian District, Dengzhuang South Road, 9#, Beijing 100094, China

J. Appl. Remote Sens. 10(2), 025015 (May 27, 2016). doi:10.1117/1.JRS.10.025015
History: Received June 23, 2015; Accepted May 4, 2016
Text Size: A A A

Abstract.  The incidence angle is a crucial parameter for synthetic aperture radar (SAR). The local incidence angle differs greatly in mountainous areas, and it may lead to quite different backscatter properties for the same ground targets for different incidence angles. As a result, it has to be taken into consideration in image classification. This work demonstrates the importance of the local incidence angle and the necessity of considering this angle in SAR image classification in mountainous areas. A local incidence angle referenced method based on support vector machines is developed to perform classification. In this method, the datasets are divided into different zones according to local incidence angle, and the training and predicting are performed within these zones to eliminate the influence of the local incidence angles. The experiments are performed around the Dongkemadi Glacier in the central Qinghai-Tibetan plateau using two RADARSAT-2 polarimetric SAR images. This paper concentrates on the effect of the local incidence angles in SAR image classification. Compared to the method using only backscatter coefficients, the proposed method improves the overall classification accuracy by 6 to 8%. More important, it is verified that this method is more helpful for the ground cover types where the terrain changes sharply.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Lei Huang ; Zhen Li and Bang-sen Tian
"Local incidence angle referenced classification on polarimetric synthetic aperture radar images in mountain glacier areas", J. Appl. Remote Sens. 10(2), 025015 (May 27, 2016). ; http://dx.doi.org/10.1117/1.JRS.10.025015


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.