Name
kirsch_dirkirsch_dirKirschDirkirsch_dirKirschDirKirschDir — Detect edges (amplitude and direction) using the Kirsch operator.
kirsch_dirkirsch_dirKirschDirkirsch_dirKirschDirKirschDir calculates an approximation of the first
derivative of the image data and is used as an edge detector. The
filter is based on the following filter masks:
-3 -3 5 -3 5 5 5 5 5 5 5 -3
-3 0 5 -3 0 5 -3 0 -3 5 0 -3
-3 -3 5 -3 -3 -3 -3 -3 -3 -3 -3 -3
5 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3
5 0 -3 5 0 -3 -3 0 -3 -3 0 5
5 -3 -3 5 5 -3 5 5 5 -3 5 5
The result image contains the maximum response of all masks. The
edge directions are returned in ImageEdgeDirImageEdgeDirImageEdgeDirImageEdgeDirImageEdgeDirimageEdgeDir, and are
stored as x / 2. They correspond to the direction of
the mask yielding the maximum response.
Note that filter operators may return unexpected results if
an image with a reduced domain is used as input. Please refer to the
chapter Filters.
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
- Automatically parallelized on channel level.
- Automatically parallelized on domain level.
Edge amplitude (gradient magnitude) image.
read_image(Image,'fabrik')
kirsch_dir(Image,Kirsch_dirA,Kirsch_dirD)
threshold(Kirsch_dirA,Res,128,255)
read_image(&Image,"fabrik");
kirsch_dir(Image,&Kirsch_dirA,&Kirsch_dirD);
threshold(Kirsch_dirA,&Res,128,255);
read_image(Image,'fabrik')
kirsch_dir(Image,Kirsch_dirA,Kirsch_dirD)
threshold(Kirsch_dirA,Res,128,255)
read_image(Image,'fabrik')
kirsch_dir(Image,Kirsch_dirA,Kirsch_dirD)
threshold(Kirsch_dirA,Res,128,255)
read_image(Image,'fabrik')
kirsch_dir(Image,Kirsch_dirA,Kirsch_dirD)
threshold(Kirsch_dirA,Res,128,255)
read_image(Image,'fabrik')
kirsch_dir(Image,Kirsch_dirA,Kirsch_dirD)
threshold(Kirsch_dirA,Res,128,255)
kirsch_dirkirsch_dirKirschDirkirsch_dirKirschDirKirschDir always returns 2 (H_MSG_TRUE). 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>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>).
If necessary, an exception is raised.
binomial_filterbinomial_filterBinomialFilterbinomial_filterBinomialFilterBinomialFilter,
gauss_filtergauss_filterGaussFiltergauss_filterGaussFilterGaussFilter,
sigma_imagesigma_imageSigmaImagesigma_imageSigmaImageSigmaImage,
median_imagemedian_imageMedianImagemedian_imageMedianImageMedianImage,
smooth_imagesmooth_imageSmoothImagesmooth_imageSmoothImageSmoothImage
hysteresis_thresholdhysteresis_thresholdHysteresisThresholdhysteresis_thresholdHysteresisThresholdHysteresisThreshold,
thresholdthresholdThresholdthresholdThresholdThreshold,
gray_skeletongray_skeletonGraySkeletongray_skeletonGraySkeletonGraySkeleton,
nonmax_suppression_dirnonmax_suppression_dirNonmaxSuppressionDirnonmax_suppression_dirNonmaxSuppressionDirNonmaxSuppressionDir,
close_edgesclose_edgesCloseEdgesclose_edgesCloseEdgesCloseEdges,
close_edges_lengthclose_edges_lengthCloseEdgesLengthclose_edges_lengthCloseEdgesLengthCloseEdgesLength
edges_imageedges_imageEdgesImageedges_imageEdgesImageEdgesImage,
sobel_dirsobel_dirSobelDirsobel_dirSobelDirSobelDir,
robinson_dirrobinson_dirRobinsonDirrobinson_dirRobinsonDirRobinsonDir,
prewitt_dirprewitt_dirPrewittDirprewitt_dirPrewittDirPrewittDir,
frei_dirfrei_dirFreiDirfrei_dirFreiDirFreiDir
bandpass_imagebandpass_imageBandpassImagebandpass_imageBandpassImageBandpassImage,
laplace_of_gausslaplace_of_gaussLaplaceOfGausslaplace_of_gaussLaplaceOfGaussLaplaceOfGauss
Foundation