Translations:Mathematical foundation of 3-D migration/57/en

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so that H(k) is expressed entirely in terms of hn and cos k. As a result, convolution with the filter hn can be performed by a recursive Chebychev filter structure described by Hale [1]. This is essential for an efficient application of a 2-D explicit extrapolation filter, since direct convolution in two dimensions is very costly.

  1. Cite error: Invalid <ref> tag; no text was provided for refs named ch07r36