Rabbani M, Shaw R, Van Metter R
J Opt Soc Am A. 1987 May;4(5):895-901. doi: 10.1364/josaa.4.000895.
We have analyzed the influence of stochastic amplifying and scattering mechanisms on the transfer of signal and noise through multistage imaging systems in terms of multivariate moment-generating functions. Stochastic amplification of photon noise by one stage of an imaging system is shown to constitute an effective signal to the next, while the underlying photon-noise component is unaffected by a subsequent scattering process. In the case of stationary, photon-limited inputs, these considerations then lead to useful expressions for the noise power spectrum and detective quantum efficiency for multistage image systems. The application of these results to the analysis of radiographic screen-film imaging systems is discussed.
我们已根据多元矩生成函数，分析了随机放大和散射机制对信号与噪声在多级成像系统中传输的影响。成像系统的某一级对光子噪声的随机放大被证明对下一级构成有效信号，而潜在的光子噪声分量不受后续散射过程的影响。对于平稳的、光子受限的输入情况，这些考虑进而得出了多级图像系统噪声功率谱和探测量子效率的有用表达式。本文讨论了这些结果在射线照相屏片成像系统分析中的应用。
