The thermal imaging system can be regard as a linear filter and its static performance model can be established by optical Fourier analytical method.
利用光学傅立叶分析的方法可以把热成像系统看作线性滤波器，并建立热成像系统的静态性能模型。
In this paper, main problems that face the Fourier spectrum analysis method and parameter model spectrum analysis method are described from the viewpoint of engineering application.
本文从工程应用的角度叙述了以付里叶变换为基础的谱分析方法和参数模型谱分析方法所面临的主要问题。
A method of using fast Fourier transformation (FFT) to calculate the frequency characteristics of discrete mathematical model is introduced.
介绍了利用快速富里叶变换(FFT)计算离散数学模型频率特性的方法。
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