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gen_sin_bandpassgen_sin_bandpassGenSinBandpassGenSinBandpassgen_sin_bandpass (算子名称)

名称

gen_sin_bandpassgen_sin_bandpassGenSinBandpassGenSinBandpassgen_sin_bandpass — Generate a bandpass filter with sinusoidal shape.

参数签名

gen_sin_bandpass( : ImageFilter : Frequency, Norm, Mode, Width, Height : )

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)

void HImage::GenSinBandpass(double Frequency, const wchar_t* Norm, const wchar_t* Mode, Hlong Width, Hlong Height)   ( Windows only)

static void HOperatorSet.GenSinBandpass(out HObject imageFilter, HTuple frequency, HTuple norm, HTuple mode, HTuple width, HTuple height)

void HImage.GenSinBandpass(double frequency, string norm, string mode, int width, int height)

def gen_sin_bandpass(frequency: float, norm: str, mode: str, width: int, height: int) -> HObject

描述

gen_sin_bandpassgen_sin_bandpassGenSinBandpassGenSinBandpassGenSinBandpassgen_sin_bandpass 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_genericFftGenericFftGenericFftGenericfft_generic 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_genericFftGenericFftGenericFftGenericfft_generic is used, 'dc_edge'"dc_edge""dc_edge""dc_edge""dc_edge""dc_edge" can be used to gain efficiency. If fft_imagefft_imageFftImageFftImageFftImagefft_image and fft_image_invfft_image_invFftImageInvFftImageInvFftImageInvfft_image_inv 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_genericRftGenericRftGenericRftGenericrft_generic 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 . All other points are set to zero.

运行信息

参数表

ImageFilterImageFilterImageFilterImageFilterimageFilterimage_filter (output_object)  image → objectHImageHObjectHImageHobject * (real)

Bandpass filter as image in the frequency domain.

FrequencyFrequencyFrequencyFrequencyfrequencyfrequency (input_control)  real → HTuplefloatHTupleHtuple (real) (double) (double) (double)

Distance of the filter's maximum from the DC term.

Default: 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

NormNormNormNormnormnorm (input_control)  string → HTuplestrHTupleHtuple (string) (string) (HString) (char*)

Normalizing factor of the filter.

Default: 'none' "none" "none" "none" "none" "none"

List of values: 'n'"n""n""n""n""n", 'none'"none""none""none""none""none"

ModeModeModeModemodemode (input_control)  string → HTuplestrHTupleHtuple (string) (string) (HString) (char*)

Location of the DC term in the frequency domain.

Default: '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"

WidthWidthWidthWidthwidthwidth (input_control)  integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Width of the image (filter).

Default: 512

Suggested values: 128, 160, 192, 256, 320, 384, 512, 640, 768, 1024, 2048, 4096, 8192

HeightHeightHeightHeightheightheight (input_control)  integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Height of the image (filter).

Default: 512

Suggested values: 120, 128, 144, 240, 256, 288, 480, 512, 576, 1024, 2048, 4096, 8192

结果

gen_sin_bandpassgen_sin_bandpassGenSinBandpassGenSinBandpassGenSinBandpassgen_sin_bandpass returns 2 ( H_MSG_TRUE) if all parameters are correct. 如有必要，将引发异常。

可能的前置算子

fft_imagefft_imageFftImageFftImageFftImagefft_image, fft_genericfft_genericFftGenericFftGenericFftGenericfft_generic, rft_genericrft_genericRftGenericRftGenericRftGenericrft_generic

可能的后置算子

convol_fftconvol_fftConvolFftConvolFftConvolFftconvol_fft

可替代算子

gen_std_bandpassgen_std_bandpassGenStdBandpassGenStdBandpassGenStdBandpassgen_std_bandpass

参考其它

fft_image_invfft_image_invFftImageInvFftImageInvFftImageInvfft_image_inv, gen_gauss_filtergen_gauss_filterGenGaussFilterGenGaussFilterGenGaussFiltergen_gauss_filter, gen_mean_filtergen_mean_filterGenMeanFilterGenMeanFilterGenMeanFiltergen_mean_filter, gen_derivative_filtergen_derivative_filterGenDerivativeFilterGenDerivativeFilterGenDerivativeFiltergen_derivative_filter, gen_bandpassgen_bandpassGenBandpassGenBandpassGenBandpassgen_bandpass, gen_bandfiltergen_bandfilterGenBandfilterGenBandfilterGenBandfiltergen_bandfilter, gen_highpassgen_highpassGenHighpassGenHighpassGenHighpassgen_highpass, gen_lowpassgen_lowpassGenLowpassGenLowpassGenLowpassgen_lowpass

模块

Foundation

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