Frequency domain operations

COMPLEX

Combine two images (real & imaginary) into a complex image (B)

COMPOL

Combine two images (magnitude & phase) into a complex image (B)

COMSEP

Separate complex image into real and imaginary components (B)

CONJ

Compute the complex conjugate of a complex-valued image (B)

CROSSCOR

Perform Fourier-domain auto- and cross-correlation (C)

DCTFIL

Filter an image using the discrete cosign transform (C)

FFT1

Compute the one-dimensional FFT of an image (C)

FFT1FIL

Filter an image at specified frequencies (C)