InverseFFTImg

DESCRIPTION

Computes the real inverse Fourier transform of an image using a mixed-radix FFT. Images whose dimensions are multiples of 2, 3, 4, 5, and 7 are transformed more rapidly, but any shape image is acceptable. The module accepts as input arrays in the packed format produced by the ForwardFFTImg module. The output image is not scaled. The Fourier transformation is discussed in:

Digital Image Processing, Gonzales, R.C., Wintz, P., Addison Wesley, Second Edition, 1987, pp 61--137.

The Fourier Transform and Its Applications, Bracewell, R.N., McGraw-Hill, Second Edition, 1978.

INPUTS

Port: Img In
Type: Lattice
Constraints: 1..3-D
Frequency domain image.

WIDGETS

OUTPUTS

Port: Img Out
Type: Lattice
Constraints: 1..3-D
Spatial domain image.

KNOWN PROBLEMS

SEE ALSO

ForwardFFTImg, FourierConjgImg, FourierCrossCorrImg, FourierExpFltImg, FourierGaussFltImg, FourierMagnitudeImg, FourierMergeImg, FourierMultImg, FourierPhaseImg, FourierPwrImg.
[Documentation Home]
© The Numerical Algorithms Group Ltd, Oxford UK. 2000