Name
gen_sin_bandpassgen_sin_bandpassGenSinBandpassgen_sin_bandpassGenSinBandpassGenSinBandpass — Generate a bandpass filter with sinusoidal shape.
Herror gen_sin_bandpass(Hobject* ImageFilter, double Frequency, const char* Norm, const char* Mode, const Hlong Width, const Hlong Height)
Herror T_gen_sin_bandpass(Hobject* ImageFilter, const Htuple Frequency, const Htuple Norm, const Htuple Mode, const Htuple Width, const Htuple Height)
void GenSinBandpass(HObject* ImageFilter, const HTuple& Frequency, const HTuple& Norm, const HTuple& Mode, const HTuple& Width, const HTuple& Height)
void HImage::GenSinBandpass(double Frequency, const HString& Norm, const HString& Mode, Hlong Width, Hlong Height)
void HImage::GenSinBandpass(double Frequency, const char* Norm, const char* Mode, Hlong Width, Hlong Height)
gen_sin_bandpassgen_sin_bandpassGenSinBandpassgen_sin_bandpassGenSinBandpassGenSinBandpass generates a rotationally invariant bandpass
filter with the response being a sinusoidal function in the
frequency domain. The maximum of the sine is determined by
FrequencyFrequencyFrequencyFrequencyFrequencyfrequency, which is given as a fraction of the maximum
(horizontal and vertical) frequency that can be represented in an
image of size WidthWidthWidthWidthWidthwidth x HeightHeightHeightHeightHeightheight, i.e.,
FrequencyFrequencyFrequencyFrequencyFrequencyfrequency should lie between 0 and 1. To achieve a maximum
overall efficiency of the filtering operation, the parameter
NormNormNormNormNormnorm can be used to specify the normalization factor of the
filter. If fft_genericfft_genericFftGenericfft_genericFftGenericFftGeneric and NormNormNormNormNormnorm = 'n'"n""n""n""n""n"
is used the normalization in the FFT can be avoided. ModeModeModeModeModemode
can be used to determine where the DC term of the filter lies or
whether the filter should be used in the real-valued FFT. If
fft_genericfft_genericFftGenericfft_genericFftGenericFftGeneric is used, 'dc_edge'"dc_edge""dc_edge""dc_edge""dc_edge""dc_edge" can be used to gain
efficiency. If fft_imagefft_imageFftImagefft_imageFftImageFftImage and fft_image_invfft_image_invFftImageInvfft_image_invFftImageInvFftImageInv are used
for filtering, NormNormNormNormNormnorm = 'none'"none""none""none""none""none" and ModeModeModeModeModemode
= 'dc_center'"dc_center""dc_center""dc_center""dc_center""dc_center" must be used. If rft_genericrft_genericRftGenericrft_genericRftGenericRftGeneric is
used, ModeModeModeModeModemode = 'rft'"rft""rft""rft""rft""rft" must be used. The filter is
always zero for the DC term, rises with the sine function up to
FrequencyFrequencyFrequencyFrequencyFrequencyfrequency, and drops for higher frequencies accordingly.
The range of the sine used is from 0 to pi. All other
points are set to zero.
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
Bandpass filter as image in the frequency domain.
Distance of the filter's maximum from the DC term.
Default value: 0.1
Suggested values: 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0
Restriction: Frequency >= 0
Normalizing factor of the filter.
Default value:
'none'
"none"
"none"
"none"
"none"
"none"
List of values: 'n'"n""n""n""n""n", 'none'"none""none""none""none""none"
Location of the DC term in the frequency domain.
Default value:
'dc_center'
"dc_center"
"dc_center"
"dc_center"
"dc_center"
"dc_center"
List of values: 'dc_center'"dc_center""dc_center""dc_center""dc_center""dc_center", 'dc_edge'"dc_edge""dc_edge""dc_edge""dc_edge""dc_edge", 'rft'"rft""rft""rft""rft""rft"
Width of the image (filter).
Default value: 512
List of values: 128, 160, 192, 256, 320, 384, 512, 640, 768, 1024, 2048, 4096, 8192
Height of the image (filter).
Default value: 512
List of values: 120, 128, 144, 240, 256, 288, 480, 512, 576, 1024, 2048, 4096, 8192
gen_sin_bandpassgen_sin_bandpassGenSinBandpassgen_sin_bandpassGenSinBandpassGenSinBandpass returns 2 (H_MSG_TRUE) if all parameters are correct.
If necessary, an exception is raised.
fft_imagefft_imageFftImagefft_imageFftImageFftImage,
fft_genericfft_genericFftGenericfft_genericFftGenericFftGeneric,
rft_genericrft_genericRftGenericrft_genericRftGenericRftGeneric
convol_fftconvol_fftConvolFftconvol_fftConvolFftConvolFft
gen_std_bandpassgen_std_bandpassGenStdBandpassgen_std_bandpassGenStdBandpassGenStdBandpass
fft_image_invfft_image_invFftImageInvfft_image_invFftImageInvFftImageInv,
gen_gauss_filtergen_gauss_filterGenGaussFiltergen_gauss_filterGenGaussFilterGenGaussFilter,
gen_mean_filtergen_mean_filterGenMeanFiltergen_mean_filterGenMeanFilterGenMeanFilter,
gen_derivative_filtergen_derivative_filterGenDerivativeFiltergen_derivative_filterGenDerivativeFilterGenDerivativeFilter,
gen_bandpassgen_bandpassGenBandpassgen_bandpassGenBandpassGenBandpass,
gen_bandfiltergen_bandfilterGenBandfiltergen_bandfilterGenBandfilterGenBandfilter,
gen_highpassgen_highpassGenHighpassgen_highpassGenHighpassGenHighpass,
gen_lowpassgen_lowpassGenLowpassgen_lowpassGenLowpassGenLowpass
Foundation