射频成像GIF技术的瞄准点选择算法

为提高射频成像制导引信一体化(GIF)技术起爆控制精度,提出精确的目标瞄准点实时判别算法. 本算法首先进行雷达图像统计学建模,设计三峰值Gauss函数对图像进行直方图规定化处理,以改变灰度值分布,削弱相干斑噪声的影响;然后利用统计排序滤波器滤波,并采用Ostu方法进行阈值处理,结合形态学方法得到目标轮廓;根据图形学中凸包的概念,计算凸多边形质心即为目标瞄准点. 理论分析和仿真结果表明,本算法时间复杂度低,可精确确定瞄准点,为提高射频成像制导引信一体化起爆控制精度及引战配合效能提供了新途径. 

Target Aimpoint Selection Algorithm for GIF with RF Seeker

A precise real-time target aimpoint selection algorithm was proposed for detonation control of RF imaging guidance integrated fuzing. According to the statistical model of SAR image, a special Gaussian function with 3 peaks was designed for histogram matching, leading to image enhancement and speckle noise weakening; the target contour was extracted with order-statistic filter, Otsu's method and morphological image processing; a convex polygon was obtained based on convex hull of graphics, whose centroid was the aimpoint. The results of the simulations show that the algorithm is efficient to get the precise aimpoint, which put forward a new method for enhancing the detonation control precision of guidance integrated fuzing technique and fuze warhead matching efficiency.