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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 the infrared detection system is used to detect the airborne targets at low altitude, various scenes of the ground may also enter the field of view of the detector. The presence of the ground objects will affect the detection of the target. From the perspective of infrared imaging, this paper mainly studies the problem that the ground view will reduce the detection ability of the system, and analyzes the reasons for the formation. In view of this problem, Methods. The method estimates the radiation of the target and its background, and then determines the length and position of the grayscale signal interval according to the range of the radiation and finally obtains the range of the desired grayscale signal. Calculation and experimental results show that this method can make full use of the resolving power of the detector and improve the detection performance of the system in the presence of ground objects.