Journal
SENSORS
Volume 9, Issue 2, Pages 1221-1236Publisher
MDPI
DOI: 10.3390/s90201221
Keywords
polarimetric SAR; co-polarization; ship detection; convolution
Funding
- National Natural Science Foundation of China [40276050]
- ENVISAT-ASAR
- Open-ended Fund of Key Laboratory of Ocean Circulation and Wave, Chinese Academy of Sciences [KLOCAW0808]
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The convolution between co-polarization amplitude only data is studied to improve ship detection performance. The different statistical behaviors of ships and surrounding ocean are characterized a by two-dimensional convolution function (2D-CF) between different polarization channels. The convolution value of the ocean decreases relative to initial data, while that of ships increases. Therefore the contrast of ships to ocean is increased. The opposite variation trend of ocean and ships can distinguish the high intensity ocean clutter from ships' signatures. The new criterion can generally avoid mistaken detection by a constant false alarm rate detector. Our new ship detector is compared with other polarimetric approaches, and the results confirm the robustness of the proposed method.
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