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To explore the capability of quad polarimetric SAR images from a new pursuit monostatic mode of TerraSAR-X and TanDEM-X, a novel process chain for ship detection and velocity estimation is proposed in this paper. Compared with the classic processing chain used for single SAR image, more efficient techniques are integrated into this novel chain, which take advantage of the new image mode and its excellent...
High-resolution synthetic aperture radar (SAR) data have been widely used in marine environmental protection, marine environmental monitoring, and marine traffic management. Ship detection is one of the important parts of SAR data for marine applications. This letter focuses on the feature analysis of ships in high-resolution SAR images and proposes an improved optimizing algorithm for ship detection...
Synthetic Aperture Radar (SAR) is a significant tool to satisfy the growing demand of the maritime vessel traffic. ScanSAR, as an important role of SAR systems with very high imageries swath, is more suitable for the detection issue. In this paper, features of ships on Radarsat-2 ScanSAR imagery are characterized as “Bright-Dark” structure. According to the unique features, a new ship detector based...
Due to its extensive and acceptable resolution, the use of scanning synthetic aperture radar (ScanSAR) image for ship detection has become a common application in ocean monitoring studies. In this paper, a new ScanSAR ship detector, which is based on the Hessian of Laplacian, is proposed. The radar echoes of ships and the antenna gain (AG) phenomenon of the ocean in ScanSAR image are investigated...
Maritime surveillance and ship detection are important applications in marine area. Azimuth ambiguities and system noises in SAR image are common phenomena, which may cause false alarms in ship detection. In this paper, a new method based on eigenvalue decomposition and OS-CFAR detector is proposed. The characteristics of ship azimuth ambiguities and systems noises are also analyzed. The method has...
Ship detection and monitoring techniques are important applications in protection of marine resources. In this paper, a ship detection method is proposed based on the Freeman three component decomposition and OS-CFAR detector. The detector has been applied on RADARSAT-2 QUAD Mode image to demonstrate the efficiency of the method. Compared with polarimetric white filter, SPAN image, HH-CFAR and HV-CFAR...
It's worth to investigate that the false alarm is reduced with polarimetic information while keeping the detection ratio when the fully polarimetic SAR images used for ship detection. An improved S-NMF (Sparseness-Nonnegative Matrix Factorization) for ship detection according to the nonnegative and sparseness characteristics of eigenvalues is proposed in this paper. The first two eigenvalues are used...
Considering the variability of Synthetic Aperture Radar (SAR) imaging (different sensor, resolution) and complex condition of sea surface, the traditional single statistical model may be no longer a good choice to fit the distribution of actual sea clutter in SAR image. Based on the characteristic of Gamma distribution which is suitable to model uniform area, and G0 distribution which is adaptive...
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