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Amplitude and Phase in 2D Fourier Transforms

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In this Demonstration, we take the 2D Fourier transform of a 2D Gaussian, , with standard deviation :

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The middle and right panels plot the amplitude and phase of the transformed function, , respectively. The 2D Fourier transform of a real-valued function may result in a complex-valued function. The amplitude is determined by the contribution from a certain frequency component, while the phase carries additional information on the spatial distribution.

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Contributed by: Katherine Rosenfeld (April 2011)
Based on a talk by: David Wilner
Open content licensed under CC BY-NC-SA

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See slides 9 and 10 from David Wilner's talk "Imaging and Deconvolution" available at http://www.aoc.nrao.edu/events/synthesis/2010/lectures10.html.

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