Marks Ii R J
Appl Opt. 1980 May 15;19(10):1670-2. doi: 10.1364/AO.19.001670.
Given a truncated portion of a band-limited image with known x and y bandwidths, the extrapolation problem is to determine the signal over all x and y. An iterative extrapolation algorithm, recently proposed by Gerchberg, requires only the repeated operations of Fourier transformation and truncation. A coherent optical processor is presented that implements Gerchberg's iterative extrapolation algorithm in two dimensions. Iteration is performed by simple passive feedback.
给定一个具有已知x和y带宽的带限图像的截断部分，外推问题就是要确定整个x和y范围内的信号。格奇伯格最近提出的一种迭代外推算法，只需要进行傅里叶变换和截断的重复操作。本文提出了一种相干光学处理器，它在二维空间中实现了格奇伯格的迭代外推算法。通过简单的无源反馈来进行迭代。
