local_minlocal_minLocalMinLocalMinlocal_min (算子)

名称

local_minlocal_minLocalMinLocalMinlocal_min — 检测图像中的所有局部最小值。

签名

local_min(Image : LocalMinima : : )

描述

local_minlocal_minLocalMinLocalMinLocalMinlocal_min extracts all points from ImageImageImageImageimageimage having a gray value smaller than the gray value of all its neighbors and returns them in LocalMinimaLocalMinimaLocalMinimaLocalMinimalocalMinimalocal_minima. The neighborhood used can be set by set_system(::'neighborhood',<4/8>)set_system("neighborhood",<4/8>)SetSystem("neighborhood",<4/8>)SetSystem("neighborhood",<4/8>)SetSystem("neighborhood",<4/8>)set_system("neighborhood",<4/8>)。

执行信息

多线程类型：可重入（与非独占算子并行运行）。
多线程作用域：全局（可从任何线程调用）。
在元组级别上自动并行化。

参数

ImageImageImageImageimageimage (输入对象) singlechannelimage(-array) → object (byte / direction / cyclic / int1 / int2 / uint2 / int4 / int8 / real)

Image to be processed.

LocalMinimaLocalMinimaLocalMinimaLocalMinimalocalMinimalocal_minima (输出对象) region(-array) → object

Extracted local minima as regions.

元素数量： LocalMinima == Image

示例 (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.LocalMin ();

  win.SetColored (12);
  mins.Display (win);
  win.Click ();

  return (0);
}

示例（C）

read_image(&Image,"fabrik");
corner_responce(Image,&CornerResp,5,0.04);
local_min(CornerResp,&Minima);
set_colored(WindowHandle,12);
disp_region(Minima,WindowHandle);
T_get_region_points(Minima,&Row,&Col);

示例 (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.LocalMin ();

  win.SetColored (12);
  mins.Display (win);
  win.Click ();

  return (0);
}

示例 (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.LocalMin ();

  win.SetColored (12);
  mins.Display (win);
  win.Click ();

  return (0);
}

示例 (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.LocalMin ();

  win.SetColored (12);
  mins.Display (win);
  win.Click ();

  return (0);
}

可能的前趋

binomial_filterbinomial_filterBinomialFilterBinomialFilterBinomialFilterbinomial_filter, gauss_filtergauss_filterGaussFilterGaussFilterGaussFiltergauss_filter, smooth_imagesmooth_imageSmoothImageSmoothImageSmoothImagesmooth_image

可能的后继

get_region_pointsget_region_pointsGetRegionPointsGetRegionPointsGetRegionPointsget_region_points, connectionconnectionConnectionConnectionConnectionconnection

替代

gray_skeletongray_skeletonGraySkeletonGraySkeletonGraySkeletongray_skeleton, lowlandslowlandsLowlandsLowlandsLowlandslowlands, lowlands_centerlowlands_centerLowlandsCenterLowlandsCenterLowlandsCenterlowlands_center

另见

monotonymonotonyMonotonyMonotonyMonotonymonotony, topographic_sketchtopographic_sketchTopographicSketchTopographicSketchTopographicSketchtopographic_sketch, corner_responsecorner_responseCornerResponseCornerResponseCornerResponsecorner_response, texture_lawstexture_lawsTextureLawsTextureLawsTextureLawstexture_laws

模块

基础

算子