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PubMed · 436408

Two-dimensional fast transforms applied to memory limited disk operating computers.

G Eden
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Abstract

Two-dimensional transform algorithms are usually impractical to small machines which cannot handle N2 real (or complex) data points in core when N is large. Storing the input data in N disk records and computing two sequential one-dimensional transforms requires N(N + 3) disk access and 2 N applications of the one-dimensional procedure. Expanding the fast one-dimensional algorithm it is suggested that only 2 N log2N disk accesses are needed whereas the one-dimensional procedure is activated only N times.

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G Eden. 1979. Two-dimensional fast transforms applied to memory limited disk operating computers.. https://doi.org/10.1016/0010-468x(79)90037-0

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