ClassesClasses | | Operators

fft_imagefft_imageFftImageFftImage (Operator)

Name

fft_imagefft_imageFftImageFftImage — Compute the fast Fourier transform of an image.

Signature

fft_image(Image : ImageFFT : : )

Herror fft_image(const Hobject Image, Hobject* ImageFFT)

Herror T_fft_image(const Hobject Image, Hobject* ImageFFT)

void FftImage(const HObject& Image, HObject* ImageFFT)

HImage HImage::FftImage() const

static void HOperatorSet.FftImage(HObject image, out HObject imageFFT)

HImage HImage.FftImage()

Description

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')
.

Attention

The transformation is always performed for the entire image, i.e., the domain of the image is ignored.

Execution Information

Parameters

ImageImageImageImageimage (input_object)  (multichannel-)image(-array) objectHImageHImageHobject (byte / real)

Input image.

ImageFFTImageFFTImageFFTImageFFTimageFFT (output_object)  image(-array) objectHImageHImageHobject * (complex)

Fourier-transformed image.

Result

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.

Possible Predecessors

optimize_fft_speedoptimize_fft_speedOptimizeFftSpeedOptimizeFftSpeedOptimizeFftSpeed, read_fft_optimization_dataread_fft_optimization_dataReadFftOptimizationDataReadFftOptimizationDataReadFftOptimizationData

Possible Successors

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

Alternatives

fft_genericfft_genericFftGenericFftGenericFftGeneric, rft_genericrft_genericRftGenericRftGenericRftGeneric

See also

fft_image_invfft_image_invFftImageInvFftImageInvFftImageInv

Module

Foundation


ClassesClasses | | Operators