Hough变换在航迹起始中的应用

Track initiation with Hough transform

为了在重杂波区内检测出运动的目标 ,提出了一种改进的 Hough变换算法用于初始航迹的建立。通过检测在变换后参量空间的积累程度 ,可以识别处于匀速运动的目标。同传统的 Hough变换算法相比 ,设计中选取了更为合适的变换参量 ,改进了原算法中性能随距离变化的缺点。解决了跨相邻图元造成积累丢失 ,推算并验证了航迹起始的检测概率及虚警概率。该算法充分利用了目标在采样时间段内的累积信息 ,具有简化的检测手段 。

A track initiation technique is proposed to detect targets in heavy clutter using a modified Hough transform method to initiate the tracking. Constant velocity targets are detected by accumulating data in the Hough parameter space. The modified Hough transform uses improved parameters. The performance deteriorates greatly with distance with the traditional Hough transform case, but is virtually independent of distance with the modified method. Also, straddling losses are avoided when using adjoining maps. Expressions are presented for P f and P d. Simulations based on a typical navigation radar show that the improved detection ability is easy to use.