DFT

Category

Transformation

Function

Computes a discrete Fourier transform.

Syntax

output = DFT(input, direction, center);

Inputs

Name	Type	Default	Description
input	field	none	field to be transformed
direction	string	"forward"	direction of the transform
center	flag	0	center the result of the transform

Outputs

Name	Type	Description
output	field	transformed data

Functional Details

This module computes the discrete Fourier transform of a 2- or 3-dimensional regular data set.

input	specifies the field to be transformed.
direction	is one of the following: "forward," "inverse," or "backward" (the last two are interchangeable).
center	specifies whether zero frequency should be placed at the center of the transformed field or at the origin of the positions array.

Components

All scalar components of input are individually Fourier-transformed and output as complex float. All other input components are propagated to the output. Thus a float 2-vector input produces a complex 2-vector output.

Example Visual Programs

FFT.net

See Also

 FFT,  Filter,  Morph