FourierPwrImg
DESCRIPTION
Raises the coefficients of a frequency domain image by a Power in the
log domain. The operation is equivalent to taking the logarithm of the
magnitude of the input image, raising that value to a power,
exponentiating the result, and writing the result back into the packed
complex form. This operation is useful for image sharpening. The input
must be a frequency domain image in the packed format produced by the
ForwardFFTImg module (see format description in ForwardFFTImg
documentation). The Fourier transformation and the cross correlation
are discussed in:
Digital Image Processing, Gonzales, R.C., Wintz, P.,
Addison Wesley, Second Edition, 1987, pp 61--137.
INPUTS
Port: Img In
Type: Lattice
Constraints: 1..3-D.
source frequency domain image
WIDGETS
Port: Power
Type: Dial
constant exponent value
OUTPUTS
Port: Img Out
Type: Lattice
Constraints: 1..3-D.
powered frequency domain image
PROBLEMS
SEE ALSO
ForwardFFTImg
InverseFFTImg
FourierMultImg
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© The Numerical Algorithms Group Ltd,
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