Journal
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
Volume 22, Issue 9, Pages 1050-1055Publisher
IEEE COMPUTER SOC
DOI: 10.1109/34.877526
Keywords
scale-space filtering; temporal versus frequency aliasing; time-frequency trade-off scale
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We study implementation issues for spatial convolution filters and their Fourier alternative, with the aim to optimize the accuracy of filter output. We focus on Gaussian scale-space filters and show that there exists a trade-off scale that subdivides the available scale range into two subintervals of equal length. Below this trade-off scale Fourier filtering yields more accurate results than spatial filtering; above it is the other way around. This should be contrasted with demands of computational speed, which show the opposite tenet.
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