FFT

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FFTInputDialogue.JPG

Algorithm Description

Calculates the Fourier Transform or Inverse Fourier Transform of an image.

FFT Input

Phase Units - Specify the input phase units. If auto determine is selected phase units are determined by finding the minimum and maximum in the phase image. Phase zero is calculated as (maximum - minimum)/2 and phase range is (maximum - minimum).
Transform Parameters - Define to 2D/3D FFT or IFFT, you need to choose by pairs.
Scale image with power law- Applies an exponential or power transform of the form f(x) = x^0.3 to improve contrast in K-space, for visualization only.
Perform FFT shift- Rearrange the outputs of fft by moving the zero frequency component to the center of the array.

FFT Output

Produces the magnitude and phase images after the requested FFT transform.

Location