A Multipolarization Analysis of Coastline Extraction Using X-Band COSMO-SkyMed SAR Data

作者：Buono Andrea^*; Nunziata Ferdinando; Mascolo Lucio; Migliaccio Maurizio

来源：IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014, 7(7): 2811-2820.

DOI：10.1109/JSTARS.2014.2320366

• Coastal areas
• coastline extraction
• Synthetic Aperture Radar (SAR)

In this study, COSMO-SkyMed (CSK) Synthetic Aperture Radar (SAR) data, collected by the single-polarization stripmap Himage mode, are exploited for coastline extraction purposes. First, a multipolarization analysis of sea surface back-scattering is undertaken using the Improved Integral Equation Method (IIEM). Then, a simple two-step approach is proposed to extract the continuous coastline from co- and cross-polarized Himage CSK SAR data. The approach is framed into two steps: 1) obtaining a binary output from the SAR image using a global threshold Constant False Alarm Rate (CFAR) detector; and 2) extracting the continuous one-pixel coastline from the binary output with a conventional Sobel edge detector. The proposed approach is verified against actual CSK SAR data and it is shown to be both effective and accurate when low-to-moderate wind conditions apply.

• 出版日期2014-7