Name
fft_imagefft_imageFftImageFftImage — Compute the fast Fourier transform of an image.
fft_imagefft_imageFftImageFftImageFftImage calculates the Fourier transform of the input
image (ImageImageImageImageimage), i.e., it transforms the image into the
frequency domain. The algorithm used is the fast Fourier transform.
This corresponds to the call
fft_generic(Image,ImageFFT,'to_freq',-1,'sqrt','dc_center','complex')
.
The transformation is always performed for the entire image, i.e., the
domain of the image is ignored.
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
- Automatically parallelized on channel level.
- Automatically parallelized on internal data level.
Fourier-transformed image.
fft_imagefft_imageFftImageFftImageFftImage returns 2 (H_MSG_TRUE) if the input image is of correct
type. If the input is empty the behavior can be set via
set_system(::'no_object_result',<Result>:)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>). If necessary,
an exception is raised.
optimize_fft_speedoptimize_fft_speedOptimizeFftSpeedOptimizeFftSpeedOptimizeFftSpeed,
read_fft_optimization_dataread_fft_optimization_dataReadFftOptimizationDataReadFftOptimizationDataReadFftOptimizationData
convol_fftconvol_fftConvolFftConvolFftConvolFft,
convol_gaborconvol_gaborConvolGaborConvolGaborConvolGabor,
convert_image_typeconvert_image_typeConvertImageTypeConvertImageTypeConvertImageType,
power_bytepower_bytePowerBytePowerBytePowerByte,
power_realpower_realPowerRealPowerRealPowerReal,
power_lnpower_lnPowerLnPowerLnPowerLn,
phase_degphase_degPhaseDegPhaseDegPhaseDeg,
phase_radphase_radPhaseRadPhaseRadPhaseRad
fft_genericfft_genericFftGenericFftGenericFftGeneric,
rft_genericrft_genericRftGenericRftGenericRftGeneric
fft_image_invfft_image_invFftImageInvFftImageInvFftImageInv
Foundation