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In this letter, polarization cross-entropy is introduced based on the eigendecomposition of the polarimetric coherence matrix. Then, the new parameter is employed for ship detection. From experimental results, it is derived that the distribution of the polarization cross-entropy in ocean regions can be well approximated by a generalized exponential distribution. Then, a constant-false-alarm-rate ship-detection...
A cross-entropy based parameter is proposed to measure the difference between a river area and others. This parameter can be employed for ship detection from a polarimetric SAR image. After deciding the boundaries of the river area, ships are detected only in the river area instead of the whole site. Therefore, most of the false alarms are eliminated. Finally, the performance of this new approach...
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