Journal
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
Volume 7, Issue 4, Pages 806-810Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2010.2048697
Keywords
Constant false alarm rate (CFAR); gray correlation; ship detect; synthetic aperture radar (SAR); 2-D joint log-normal (2DLN) distribution
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The characteristic difference between targets and clutter is analyzed. Considering the ship target's gray intensity distribution and its shape difference compared to the clutter, in this letter, a new algorithm is presented based on correlation. The algorithm utilizes the strong gray intensity correlation in the ship target; also, the joint gray intensity distribution using 2-D joint log-normal distribution of a pixel with neighboring pixels in the clutter is modeled, which can be used for correlation-based joint constant false alarm rate detection. Using this algorithm, the false alarms caused by speckle and local background nonhomogeneity can be greatly reduced. The detection performance is much better.
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