Research on Constant False Alarm Rate Detection Technique for Ship in SAR Image

MENG Xiangwei

doi:10.11999/JEIT231436

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MENG Xiangwei. Research on Constant False Alarm Rate Detection Technique for Ship in SAR Image[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231436

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MENG Xiangwei. Research on Constant False Alarm Rate Detection Technique for Ship in SAR Image[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231436

MENG Xiangwei. Research on Constant False Alarm Rate Detection Technique for Ship in SAR Image[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231436

Citation:

MENG Xiangwei. Research on Constant False Alarm Rate Detection Technique for Ship in SAR Image[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231436

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Research on Constant False Alarm Rate Detection Technique for Ship in SAR Image

doi: 10.11999/JEIT231436

MENG Xiangwei^,

Department of Electrical and Electronic Engineering, Yantai Nanshan University, Yantai 265713, China

Funds: The National Natural Science Foundation of China (62171402)

Received Date: 2023-12-28
Rev Recd Date: 2024-06-13

Available Online: 2024-06-19

Abstract

Abstract

Among various methods to detect the ship targets in Synthetic Aperture Radar (SAR) image, the Constant False Alarm Rate (CFAR) detection algorithm with an adaptive detection threshold is the most important and extensively used one. In order to improve the detection performance for ships in SAR image, various statistical distributions are applied, with an attempt to accurately model the SAR clutter backgrounds, such as Gamma, K, log-normal, G0, the alpha-stable distribution, etc. In modern radar systems, the use of the CFAR technique is necessary to keep the false alarms at a suitably low rate in an a priori unknown time-varying and spatially nonhomogeneous backgrounds, and to improve the detection probability as much as possible. The clutter background in SAR images is complicated and variable, when the actual clutter background deviates from the assumed statistical distribution, the performance of the parametric CFAR detectors deteriorates, whereas the nonparametric CFAR method exhibits its advantage. In this paper, the Wilcoxon nonparametric CFAR scheme for ship detection in SAR image is proposed and analyzed. By comparison with several typical parametric CFAR schemes on 3 real SAR images of Radarsat-2, ICEYE-X6 and Gaofen-3, the robustness of the Wilcoxon nonparametric detector to maintain a good false alarm performance in these different detection backgrounds is revealed, and its detection performance for the weak ship is improved evidently. Moreover, the detection speed of the Wilcoxon nonparametric detector is fast, and it has the simplicity of hardware implementation.
- SAR image,
- Radar clutter,
- Target detection,
- Constant False Alarm Rate(CFAR),
- Nonparametric

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References(18)

References

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