lowlandslowlandsLowlandsLowlandslowlands (Operator)
Name
lowlandslowlandsLowlandsLowlandslowlands — Detect all gray value lowlands.
Signature
def lowlands(image: HObject) -> HObject
Description
lowlandslowlandsLowlandsLowlandsLowlandslowlands extracts all points from ImageImageImageImageimageimage with a gray value
less or equal to the gray value of its neighbors (8-neighborhood) and
returns them in LowlandsLowlandsLowlandsLowlandslowlandslowlands. Each lowland is returned as a separate
region.
Execution Information
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
Parameters
ImageImageImageImageimageimage (input_object) singlechannelimage(-array) → objectHImageHObjectHImageHobject (byte / direction / cyclic / int1 / int2 / uint2 / int4 / int8 / real)
Image to be processed.
LowlandsLowlandsLowlandsLowlandslowlandslowlands (output_object) region-array → objectHRegionHObjectHRegionHobject *
Extracted lowlands as regions (one region for
each lowland).
Example (C++ (HALCON 5.0-10.0))
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;
int main (int argc, char *argv[])
{
if (argc != 2)
{
cout << "Usage : " << argv[0] << " <name of image>" << endl;
return (-1);
}
HImage image (argv[1]);
HWindow win;
image.Display (win);
HImage cres = image.CornerResponse (5, 0.04);
HRegionArray mins = cres.Lowlands ();
win.SetColored (12);
mins.Display (win);
win.Click ();
return (0);
}
Example (C)
read_image(&Image,"fabrik");
corner_responce(Image,&CornerResp,5,0.04);
lowlands(CornerResp,&Minima);
set_colored(WindowHandle,12);
disp_region(Minima,WindowHandle);
T_area_center(Minima,NULL,&Row,&Col);
Example (C++ (HALCON 5.0-10.0))
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;
int main (int argc, char *argv[])
{
if (argc != 2)
{
cout << "Usage : " << argv[0] << " <name of image>" << endl;
return (-1);
}
HImage image (argv[1]);
HWindow win;
image.Display (win);
HImage cres = image.CornerResponse (5, 0.04);
HRegionArray mins = cres.Lowlands ();
win.SetColored (12);
mins.Display (win);
win.Click ();
return (0);
}
Example (C++ (HALCON 5.0-10.0))
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;
int main (int argc, char *argv[])
{
if (argc != 2)
{
cout << "Usage : " << argv[0] << " <name of image>" << endl;
return (-1);
}
HImage image (argv[1]);
HWindow win;
image.Display (win);
HImage cres = image.CornerResponse (5, 0.04);
HRegionArray mins = cres.Lowlands ();
win.SetColored (12);
mins.Display (win);
win.Click ();
return (0);
}
Example (C++ (HALCON 5.0-10.0))
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;
int main (int argc, char *argv[])
{
if (argc != 2)
{
cout << "Usage : " << argv[0] << " <name of image>" << endl;
return (-1);
}
HImage image (argv[1]);
HWindow win;
image.Display (win);
HImage cres = image.CornerResponse (5, 0.04);
HRegionArray mins = cres.Lowlands ();
win.SetColored (12);
mins.Display (win);
win.Click ();
return (0);
}
Possible Predecessors
binomial_filterbinomial_filterBinomialFilterBinomialFilterBinomialFilterbinomial_filter,
gauss_filtergauss_filterGaussFilterGaussFilterGaussFiltergauss_filter,
smooth_imagesmooth_imageSmoothImageSmoothImageSmoothImagesmooth_image
Possible Successors
area_centerarea_centerAreaCenterAreaCenterAreaCenterarea_center,
get_region_pointsget_region_pointsGetRegionPointsGetRegionPointsGetRegionPointsget_region_points,
select_shapeselect_shapeSelectShapeSelectShapeSelectShapeselect_shape
Alternatives
lowlands_centerlowlands_centerLowlandsCenterLowlandsCenterLowlandsCenterlowlands_center,
gray_skeletongray_skeletonGraySkeletonGraySkeletonGraySkeletongray_skeleton,
local_minlocal_minLocalMinLocalMinLocalMinlocal_min
See also
monotonymonotonyMonotonyMonotonyMonotonymonotony,
topographic_sketchtopographic_sketchTopographicSketchTopographicSketchTopographicSketchtopographic_sketch,
corner_responsecorner_responseCornerResponseCornerResponseCornerResponsecorner_response,
texture_lawstexture_lawsTextureLawsTextureLawsTextureLawstexture_laws
Module
Foundation