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结合红外成像系统的组成结构以及红外辐射信号的传递过程,给出了杂波的定义,即杂波是场景中包含的与目标信号相似的信号,同时分析了杂波的特征依赖性和相对性。基于杂波仅通过信号处理算法对目标信号产生影响的认识,给出了杂波影响下的系统探测性能模型,并与不考虑杂波时的系统探测性能模型进行对比,指出背景杂波导致的目标检测难度远远大于不考虑杂波的情况,系统的探测性能是目标、背景间均值、方差差异的复杂函数。
Combined with the composition of infrared imaging system and the transmission process of infrared radiation signals, the definition of clutter is given, that is, the clutter is a signal similar to the target signal contained in the scene, and the characteristic dependence and relativity of the clutter are also analyzed . Based on the understanding that the clutter affects the target signal only by the signal processing algorithm, the system detection performance model under the influence of clutter is given and compared with the system detection performance model without considering the clutter, and the background clutter-induced Target detection is much more difficult than without considering the clutter, the detection performance of the system is a complex function of the target, background mean and variance differences.