上反式光电侦查设备虚拟海天线波门控制方法

Control method based on virtual sea-horizon wave gate for up-trans photoelectric scout device

针对上反式光电侦查设备采用传统波门控制方法全视场搜索跟踪水面目标时,由于背景辐射和波面反射造成较高虚警率的问题,提出一种适合上反式光电侦查设备搜索波门布置策略的控制方法。该方法通过建立虚拟海平面经两轴上反式光电侦查设备空间模型反射、投影的数学模型,实时计算虚拟海天线和视频图像边线的交点并发送给视频跟踪器,沿虚拟海天线布置的窄带状搜索波门,仅对搜索波门内的水面目标作出响应。海试试验证明,该方法的目标搜索效率与带状波门所占图像面积的比例成反比,虚警率降低80%。

When the traditional up-trans photoelectric scout devices search and scout the surface targets in full field, the sky background radiation and the surface reflection yawp hold abso- lutely a majority of the image area, so the false alarm rate is rather high. At the same time, picking-up and scouting the surface target in complete image require exorbitant hardware and software of the video tracker. Aiming at the problems above, we proposed a control method of scout wave gate collocation strategy for fitting the up-trans photoelectric scout device. We built the math model of the virtual sea level reflected and projected by the space model of up- trans photoelectric scout device, calculated the points of intersection of the virtual sea-horizon and video image sidelines and sent to the video tracker in time, then collocated the narrowband scout wave gate along the virtual sea-horizon, the device only responded the surface target in the scouting wave gate as a result. The sea experiment result show that, the efficiency of ob- ject searching is inversely proportional to the proportion of narrowband scout in the image, and the error alarm rate reduces 80%.