成象系统分辨特性分析

成象过程可视为原图象通过成象系统,并产生与原图象有差异的图象估计的过程。成象系统的结构(可由数学模型表示)决定了图象估计的质量.因此,我们通过分析成象系统结构特征就可以达到分析成象系统分辨能力的目的。本文较细致地定义了成象系统分辨特征指标,并指出了这些指标的分析计算过程。作为实例,我们用本文的分析方法分析了ISAR R—D成象系统的分辨特性。

Resolution performance analysis of imaging system

A general analyzing method for imaging system resolution performance is introduced.As is well known, an imaging process can be thought as of the image estimation process inwhich the original image function passes through the imaging system and the image differ-ent from the original image is produced from the system. So the structure of the imagingsystem determines the quality of the image estimation. For this reason, through the analysisof the structure characteristics of an imaging system, we can achieve the goal to analyze theresolution performance of the imaging system. In this paper, we define some resolutioncharacteristic parameters and show the calculating process for the parameters. As an exam-ple, we use the analyzing method to analyze the resolution performance of the ISAR R-Dimaging system.