Name
fft_imagefft_imageFftImagefft_imageFftImageFftImage — Compute the fast Fourier transform of an image.
fft_imagefft_imageFftImagefft_imageFftImageFftImage calculates the Fourier transform of the input
image (ImageImageImageImageImageimage), 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_imageFftImagefft_imageFftImageFftImage 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>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>). If necessary,
an exception is raised.
optimize_fft_speedoptimize_fft_speedOptimizeFftSpeedoptimize_fft_speedOptimizeFftSpeedOptimizeFftSpeed,
read_fft_optimization_dataread_fft_optimization_dataReadFftOptimizationDataread_fft_optimization_dataReadFftOptimizationDataReadFftOptimizationData
convol_fftconvol_fftConvolFftconvol_fftConvolFftConvolFft,
convol_gaborconvol_gaborConvolGaborconvol_gaborConvolGaborConvolGabor,
convert_image_typeconvert_image_typeConvertImageTypeconvert_image_typeConvertImageTypeConvertImageType,
power_bytepower_bytePowerBytepower_bytePowerBytePowerByte,
power_realpower_realPowerRealpower_realPowerRealPowerReal,
power_lnpower_lnPowerLnpower_lnPowerLnPowerLn,
phase_degphase_degPhaseDegphase_degPhaseDegPhaseDeg,
phase_radphase_radPhaseRadphase_radPhaseRadPhaseRad
fft_genericfft_genericFftGenericfft_genericFftGenericFftGeneric,
rft_genericrft_genericRftGenericrft_genericRftGenericRftGeneric
fft_image_invfft_image_invFftImageInvfft_image_invFftImageInvFftImageInv
Foundation