红外鱼眼系统下的多目标航迹起始方法研究

为了实现红外鱼眼系统下对多目标航迹进行起始，分析了红外鱼眼系统下目标在像面上的运动特点，提出了用于红外鱼眼系统的多目标航迹起始算法。算法采用逻辑法中的3/4逻辑，利用最大速度约束法去除各采样周期中大部分非相关量测点，用Hough变换方法确定可能航迹，用匀速约束对航迹进行确认。利用模拟目标对算法进行了实验和分析，结果表明，该算法与标准Hough变换法和逻辑法相比，航迹起始性能有了明显提高。当杂波个数为450个时，航迹起始虚警率仅为14%；对非断点航迹的成功起始时间为3帧，对断点航迹的成功起始时间为4帧，且在密集杂波环境下算法执行时间也较短。

Multi-target track initiation of infrared fisheye warning system

In order to realize multi-target track initiation of infrared fisheye warning system, the technology of multi-target track initiation was studied for infrared fisheye warning system. The target moving characteristics on the image surface were analyzed, based on which an algorithm of multi-target track initiation proper to the infrared fisheye warning system was proposed. Using 3/4 logic of the logic method, the maximum velocity constraint method was firstly used to remove the uncorrelated measuring points in each sampling period so that the calculation amount of the Hough transformation could be reduced. The Hough transform method was used to generate initial target tracks, and the uniform velocity criterion was used to select the right tracks. The algorithm was verified with simulated targets. It is shown that, compared with the standard Hough transform and the logic method, the track initiation performance is obviously improved. For 450 clutters, the false alarm probability of track initiation is only 14%; the track initiation consuming time for continuous points is 3 frames while that for the non-continuous points is 4 frames. Further more this algorithm has less running time under the dense clutter environment.