SAR图像点目标的检测

Detection for SAR image point target

分析了在均匀杂波回波功率服从 Gamma分布条件下 SAR点目标检测 ,推导了点目标虚警概率和检测概率与阈值系数关系 ,提出了检测点目标阈值系数选择根据和方法。在杂波均值估计方面 ,提出了以全局均值代替局部动态均值。

Point target detection in SAR image is analyzed in case of Gamma distribution for echo power of uniformity clutter.The relationship between threshold coefficient and false alarm probability and detection probability are deduced according to statistic of SAR image, so theory and method of selecting threshold coefficient for point target detection are obtained.The method of local dynamic mean value placed by global mean value is proposed.Experiment shows methods in this paper are better than the two parameter constant false alarm rate (CFAR) in detection validity and calculating quantity.