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光电成像系统的抽样过程引起图像频谱分布在频谱空间无限重复，即使抽样过程满足系统的Ｎｙｑｕｉｓｔ条件，即无频谱混叠，但在重建过程中，如果电子滤波的频率响应范围较宽，不能对高阶频谱项截止，它对高阶重复的频谱项的衰减所产生的残余频谱会在重建图像中产生假响应。本文提出用同一图像进行多重交织抽样的方法来消除重建过程中的高阶残余频谱，同时具有较好图像恢复的效果。在理论上用光学传递函数方法证明了有关的结论。
The sampling process of the electro-optical imaging system causes the image spectral distribution to repeat indefinitely in the spectral space. Even though the sampling process satisfies the Nyquist condition of the system, ie, there is no spectral aliasing, in the reconstruction process, if the frequency response of the electronic filtering is wide, When the spectral term is cut off, the residual spectrum generated by the attenuation of the spectral components of the higher-order repetition will generate a false response in the reconstructed image. This paper proposes to use the same image to carry out multiple interlacing sampling to eliminate the high-order residual spectrum in the reconstruction process and at the same time, it has good effect of image restoration. In theory, the optical transfer function method to prove the relevant conclusions.