光学学报, 1999, 19 (12): 1649, 网络出版: 2006-08-09
光电成像系统混淆效应的定量分析
Quantitative Analysis of Aliasing Effects in Opto-Electric Imaging Systems
光电成像系统 傅里叶变换 欠抽样 频谱混淆 莫尔条纹 opto-electric imaging system Fourier transform sampling aliasing Moire patterns
摘要
光电成像系统由于欠抽样产生频谱混淆。 用矢量分析方法, 给出了正弦图像基元的混淆表达式。 具体分析了以矩形光栅为例的周期性目标莫尔条纹式的混淆效应, 以及非周期性目标噪声形式的混淆效应。 并分别作了计算机仿真实验。
Abstract
In opto-electric imaging systems, aliasing will occur when sampling a scene containing spatial frequencies exceeding half of the sampling frequency. By the use of vector analysis method, a quantitative aliasing expression for an sinusoidal elementary image is given. Moire effect as an aliasing phenomenon of periodic objects and aliasing contents as signal dependent noise of non-periodic objects are analysed. Computer simulations are presented for both cases.
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张海涛, 赵达尊. 光电成像系统混淆效应的定量分析[J]. 光学学报, 1999, 19(12): 1649. 张海涛, 赵达尊. Quantitative Analysis of Aliasing Effects in Opto-Electric Imaging Systems[J]. Acta Optica Sinica, 1999, 19(12): 1649.
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