论文部分内容阅读
红外传感系统用作图象特征探测和分类时，对其性能的预测需要评估特征源和背景产生的传感器的图象信号。这个过程包括评估探测器、扫描系统（如果采用的话）和光学系统在特定环境下，对系统性能的影响。传感器性能分析需要考虑源和背景辐射特性，并且通常假设它为扩展源。而对某些任务，在决定源产生的景象对比度时，除了辐射特性之外，还必须考虑源的表现尺寸。对一个源表现尺寸的要求是由于在成象过程中光学模糊而使表现尺寸小的辐射源的图象对比度降低引起的。本文分析了源的表现尺寸、探测器瞬时视场和光学模糊对成象红外传感器图象对比度的影响。
When used to detect and classify image features, the use of infrared sensing systems to predict their performance requires evaluation of the image signals from the source and background generated sensors. This process includes assessing the effects on the system performance of the detector, the scanning system (if used) and the optical system under certain circumstances. Sensor performance analysis needs to consider the source and background radiation characteristics, and is generally assumed to be an extension source. For certain tasks, in addition to the radiation characteristics, the dimensions of the source must be considered in determining the contrast of the scene produced by the source. The requirement for a source representation size is due to a reduction in the image contrast of a radiation source exhibiting small size due to optical blur during imaging. In this paper, the effects of source size, instantaneous field of view of detector and optical blur on image contrast of imaging infrared sensor are analyzed.