Two-dimensional zoom FFT

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Stork, R.
Hoyer, Elmer A.

Stork, R.; Hoyer, E.; , "Two-dimensional zoom FFT," Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '78. , vol.3, no., pp. 753- 756, Apr 1978 doi: 10.1109/ICASSP.1978.1170462


The concept of the zoom FFT (a more efficient algorithm which allows zooming in on a narrow segment of the spectrum while preserving its frequency content) is extended to the two-dimensional case. The technique is further expanded to allow zooms over a specified segment within both the time and the frequency domains. Comparisons are also made as to the computational efficiency of this technique compared to the conventional two-dimensional FFT algorithms.

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