微光成像系统量子噪声的计算机模拟仿真研究

针对在微光成像过程中起主要影响作用的噪声成分 ,建立了微光成像系统的量子噪声数学模型。为了仿真微光成像系统中的量子噪声 ,必须生成符合噪声分布的随机数据 ,并根据已建立的模型进行加权。采用线性同余法生成 3个均匀分布随机序列 ,其中两个分别组成新的随机序列的整数和小数部分 ,第 3个用来对新序列进行混洗。然后采用函数变换法由均匀分布的随机序列生成高斯分布的随机序列。仿真软件实时提取视频流 ,叠加噪声并与原始视频同时回放 ,实现了实时仿真微光成像系统的量子噪声

Simulation of Quantum Noise in the Low-Light-Level Imaging System

A mathematical model of quantum noise having much effect on the low light imaging system is set up. To simulate the quantum noise, the random numbers obeying noise distribution must be formed and are weighted on the basis of the model created. Three uniform random sequences are built by the linear congruential method, of which two are used to form integer number and decimal fraction parts of the new random sequence respectively and the third to shuffle the new sequence. And then a Gauss sequence is formed out of uniform distribution by a function transforming method. It actualizes the simulation in real time of quantum noise in the low light imaging system, where video flow is extracted in real time, the noise summed up and played back side by side with the original video signs by a simulation software.