局部灰度化的空中红外目标探测方法

Air Infrared Target Detecting Based on Partial Graying

在红外探测系统对空中目标进行低空探测时,地面的各种景物也可能进入探测器视场内,地面景物的存在将对目标的探测产生影响。从红外成像的角度出发,主要对地面景物会降低系统探测能力的问题进行了研究,分析了这种影响形成的原因,并针对该问题,提出了通过灰度化探测器视场内特定信号区间的方法。该方法对目标和其所在背景的辐射进行估计,再根据二者辐射的范围对灰度化信号区间的长度和位置进行确定,并最终得到所需灰度化信号的范围。计算和实验结果表明,采用该方法可以充分利用探测器的分辨本领,提高在地面景物存在情况下系统的探测性能。

When to detect the air target at the low altitude by the infrared （IR） detecting system, the scenery on the ground can also be contained in the view of the detector, and affects detecting of the target. Based on the IR imaging, the problem of the ground scenery can weaken the detecting capability of the IR system is studied, and the reason for this problem is analyzed, the method of graying a special signal range within the view of the detector is proposed for this specific problem. According to this method, the radiation of the target and its background are evaluated, the length and the location of the signal range to be grayed are confirmed by the evaluated results, so the signal range that need to be grayed can be gotten. The calculated and experiment results show that the detecting capability can be improved by this method when encountering the ground scenery.