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Fast fine-pixel aerial image calculation in partially coherent imaging by matrix representation of modified Hopkins equation

机译:通过修正的霍普金斯方程的矩阵表示快速实现部分相干成像中精细像素航空图像的计算

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摘要

A fast computation algorithm for fine-pixel aerial images is presented that modifies the transmission cross coefficient approach of Hopkins as a product of two matrices. The spatial frequency of the image is calculated by the sum of diagonal and off-diagonal elements of the matrix. Let N, N_(F), and M be the number of the point sources, the sampling number for fast Fourier transform, and the sampling number in the spatial frequency domain ranging twice the pupil size, respectively. The calculation time of this method is proportional to BN[(M - 1)/2]~(4), while that of a conventional source integration method is 2ANN_(F)log_(2)N_(F), where A and B are constants and generally B < A. If N_(F) is sufficiently greater than M or M is small enough, which is the fine-pixel condition, this method runs faster than the source integration method. If the coherence factor is 0.9 and M <= 55, this method runs faster than the source integration even under the Nyquist sampling condition.
机译:提出了一种用于精细像素航空图像的快速计算算法,该算法将霍普金斯的传输交叉系数方法修改为两个矩阵的乘积。图像的空间频率由矩阵的对角线元素和非对角线元素之和计算得出。令N,N_(F)和M分别为点源数,用于快速傅里叶变换的采样数和在两倍于瞳孔大小的空间频域中的采样数。该方法的计算时间与BN [(M-1)/ 2]〜(4)成正比,而常规源积分方法的计算时间为2ANN_(F)log_(2)N_(F),其中A和B是常数,通常B

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  • 来源
    《Applied optics》 |2010年第20期|共7页
  • 作者

    Kenji Yamazoe;

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