Name
gen_sin_bandpass gen_sin_bandpass GenSinBandpass gen_sin_bandpass GenSinBandpass GenSinBandpass — 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_bandpass gen_sin_bandpass GenSinBandpass gen_sin_bandpass GenSinBandpass GenSinBandpass 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
Frequency Frequency Frequency Frequency Frequency frequency , which is given as a fraction of the maximum
(horizontal and vertical) frequency that can be represented in an
image of size Width Width Width Width Width width x Height Height Height Height Height height , i.e.,
Frequency Frequency Frequency Frequency Frequency frequency should lie between 0 and 1. To achieve a maximum
overall efficiency of the filtering operation, the parameter
Norm Norm Norm Norm Norm norm can be used to specify the normalization factor of the
filter. If fft_generic fft_generic FftGeneric fft_generic FftGeneric FftGeneric and Norm Norm Norm Norm Norm norm = 'n' "n" "n" "n" "n" "n"
is used the normalization in the FFT can be avoided. Mode Mode Mode Mode Mode mode
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_generic fft_generic FftGeneric fft_generic FftGeneric FftGeneric is used, 'dc_edge' "dc_edge" "dc_edge" "dc_edge" "dc_edge" "dc_edge" can be used to gain
efficiency. If fft_image fft_image FftImage fft_image FftImage FftImage and fft_image_inv fft_image_inv FftImageInv fft_image_inv FftImageInv FftImageInv are used
for filtering, Norm Norm Norm Norm Norm norm = 'none' "none" "none" "none" "none" "none" and Mode Mode Mode Mode Mode mode
= 'dc_center' "dc_center" "dc_center" "dc_center" "dc_center" "dc_center" must be used. If rft_generic rft_generic RftGeneric rft_generic RftGeneric RftGeneric is
used, Mode Mode Mode Mode Mode mode = '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
Frequency Frequency Frequency Frequency Frequency frequency , and drops for higher frequencies accordingly.
The range of the sine used is from 0 to
. 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_bandpass gen_sin_bandpass GenSinBandpass gen_sin_bandpass GenSinBandpass GenSinBandpass returns 2 (H_MSG_TRUE) if all parameters are correct.
If necessary, an exception is raised.
fft_image fft_image FftImage fft_image FftImage FftImage ,
fft_generic fft_generic FftGeneric fft_generic FftGeneric FftGeneric ,
rft_generic rft_generic RftGeneric rft_generic RftGeneric RftGeneric
convol_fft convol_fft ConvolFft convol_fft ConvolFft ConvolFft
gen_std_bandpass gen_std_bandpass GenStdBandpass gen_std_bandpass GenStdBandpass GenStdBandpass
fft_image_inv fft_image_inv FftImageInv fft_image_inv FftImageInv FftImageInv ,
gen_gauss_filter gen_gauss_filter GenGaussFilter gen_gauss_filter GenGaussFilter GenGaussFilter ,
gen_mean_filter gen_mean_filter GenMeanFilter gen_mean_filter GenMeanFilter GenMeanFilter ,
gen_derivative_filter gen_derivative_filter GenDerivativeFilter gen_derivative_filter GenDerivativeFilter GenDerivativeFilter ,
gen_bandpass gen_bandpass GenBandpass gen_bandpass GenBandpass GenBandpass ,
gen_bandfilter gen_bandfilter GenBandfilter gen_bandfilter GenBandfilter GenBandfilter ,
gen_highpass gen_highpass GenHighpass gen_highpass GenHighpass GenHighpass ,
gen_lowpass gen_lowpass GenLowpass gen_lowpass GenLowpass GenLowpass
Foundation