gen_filter_maskgen_filter_maskGenFilterMaskGenFilterMaskgen_filter_mask (Operator)
Name
gen_filter_maskgen_filter_maskGenFilterMaskGenFilterMaskgen_filter_mask — Store a filter mask in the spatial domain as a real-image.
Signature
void GenFilterMask(HObject* ImageFilter, const HTuple& FilterMask, const HTuple& Scale, const HTuple& Width, const HTuple& Height)
void HImage::GenFilterMask(const HTuple& FilterMask, double Scale, Hlong Width, Hlong Height)
void HImage::GenFilterMask(const HString& FilterMask, double Scale, Hlong Width, Hlong Height)
void HImage::GenFilterMask(const char* FilterMask, double Scale, Hlong Width, Hlong Height)
void HImage::GenFilterMask(const wchar_t* FilterMask, double Scale, Hlong Width, Hlong Height)
(
Windows only)
static void HOperatorSet.GenFilterMask(out HObject imageFilter, HTuple filterMask, HTuple scale, HTuple width, HTuple height)
void HImage.GenFilterMask(HTuple filterMask, double scale, int width, int height)
void HImage.GenFilterMask(string filterMask, double scale, int width, int height)
Description
gen_filter_maskgen_filter_maskGenFilterMaskGenFilterMaskgen_filter_mask stores a filter mask in the spatial domain
as a real-image. The center of the filter mask lies in the center
of the resulting image. The parameter ScaleScaleScalescalescale determines by
which amount the values of the filter mask are multiplied (this
results in larger values of the Fourier transform of the filter).
The corresponding filter matrix, which is given in
FilterMaskFilterMaskFilterMaskfilterMaskfilter_mask can be generated either from a file or a
tuple. The format of the filter matrix is described with the
operator convol_imageconvol_imageConvolImageConvolImageconvol_image. Example filter masks can be found in
the directory “filter” in the HALCON home directory. This
operator is useful for visualizing the frequency response of filter
masks (by applying a Fourier transform to the result image of this
operator).
Execution Information
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
Parameters
ImageFilterImageFilterImageFilterimageFilterimage_filter (output_object) image → objectHImageHObjectHObjectHobject * (real)
Filter in the spatial domain.
FilterMaskFilterMaskFilterMaskfilterMaskfilter_mask (input_control) filename.read(-array) → HTupleMaybeSequence[Union[int, str]]HTupleHtuple (string / integer) (string / int / long) (HString / Hlong) (char* / Hlong)
Filter mask as file name or tuple.
Default:
'gauss'
"gauss"
"gauss"
"gauss"
"gauss"
Suggested values:
'gauss'"gauss""gauss""gauss""gauss", 'laplace4'"laplace4""laplace4""laplace4""laplace4", 'laplace8'"laplace8""laplace8""laplace8""laplace8", 'lowpas_3_3'"lowpas_3_3""lowpas_3_3""lowpas_3_3""lowpas_3_3", 'lowpas_5_5'"lowpas_5_5""lowpas_5_5""lowpas_5_5""lowpas_5_5", 'lowpas_7_7'"lowpas_7_7""lowpas_7_7""lowpas_7_7""lowpas_7_7", 'lowpas_9_9'"lowpas_9_9""lowpas_9_9""lowpas_9_9""lowpas_9_9", 'sobel_c'"sobel_c""sobel_c""sobel_c""sobel_c", 'sobel_l'"sobel_l""sobel_l""sobel_l""sobel_l"
ScaleScaleScalescalescale (input_control) real → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Scaling factor.
Default:
1.0
Suggested values:
0.3, 0.5, 0.75, 1.0, 1.25, 1.5, 2.0
Minimum increment:
0.001
Recommended increment:
0.1
WidthWidthWidthwidthwidth (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
HeightHeightHeightheightheight (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
Example (HDevelop)
* If the filter should be read from a file:
gen_filter_mask (Filter, 'lowpas_3_3', 1.0, 512, 512)
* If the filter should be directly passed as a tuple:
gen_filter_mask (Filter, [3,3,9,1,1,1,1,1,1,1,1,1], 1.0, 512, 512)
fft_image (Filter, FilterFFT)
dev_set_paint ('3d_plot')
dev_display (FilterFFT)
Possible Successors
fft_imagefft_imageFftImageFftImagefft_image,
fft_genericfft_genericFftGenericFftGenericfft_generic
See also
convol_imageconvol_imageConvolImageConvolImageconvol_image
Module
Foundation