contlengthcontlengthContlengthContlengthcontlength（算子）

名称

contlengthcontlengthContlengthContlengthcontlength — 区域的轮廓长度。

签名

contlength(Regions : : : ContLength)

描述

算子 contlengthcontlengthContlengthContlengthContlengthcontlength calculates the total length of the contour (sum of all connection components of the region) for each region of RegionsRegionsRegionsRegionsregionsregions. The distance between two neighboring contour points parallel to the coordinate axes is rated 1, the distance in the diagonal is rated 。

In the documentation of this chapter (Regions / Features), you can find an image illustrating regions which vary in the length of their contours.

If more than one region is passed the numerical values of the contour length are stored in a tuple, the position of a value in the tuple corresponding to the position of the region in the input tuple. In case of an empty region the operator contlengthcontlengthContlengthContlengthContlengthcontlength returns the value 0.

注意

The contour of holes is not calculated.

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

RegionsRegionsRegionsRegionsregionsregions (输入对象) region(-array) → object

待检查的区域。

ContLengthContLengthContLengthContLengthcontLengthcont_length (输出控制) real(-array) → (real)

Contour length of the input region(s).

Assertion: ContLength >= 0

示例 (C++)

#include "HalconCpp.h"
#include <iostream>
using namespace HalconCpp;

int main (int argc, char *argv[])
{
  HWindow        w(10,10,512,512);
  HRegion        reg;
  int            NumOfElements = 3;

  std::cout << "Draw " << NumOfElements << " regions " << std::endl;
  GenEmptyObj(&reg);
  for (int i=0; i < NumOfElements; i++)
  {
    reg = reg.ConcatObj(w.DrawRegion());
  }

  HTuple circ = reg.Circularity ();
  HTuple cont = reg.Contlength ();

  for (int i = 0; i < NumOfElements; i++)
  {
    std::cout << "region " << i+1 << ": \tcircularity = " << circ[i].D() <<
                 "\tcontour length =" << cont[i].D() << std::endl;
  }
  std::cout << "Click into the graphics window to end." << std::endl;
  w.Click ();
  return(0);
}

示例 (C++)

#include "HalconCpp.h"
#include <iostream>
using namespace HalconCpp;

int main (int argc, char *argv[])
{
  HWindow        w(10,10,512,512);
  HRegion        reg;
  int            NumOfElements = 3;

  std::cout << "Draw " << NumOfElements << " regions " << std::endl;
  GenEmptyObj(&reg);
  for (int i=0; i < NumOfElements; i++)
  {
    reg = reg.ConcatObj(w.DrawRegion());
  }

  HTuple circ = reg.Circularity ();
  HTuple cont = reg.Contlength ();

  for (int i = 0; i < NumOfElements; i++)
  {
    std::cout << "region " << i+1 << ": \tcircularity = " << circ[i].D() <<
                 "\tcontour length =" << cont[i].D() << std::endl;
  }
  std::cout << "Click into the graphics window to end." << std::endl;
  w.Click ();
  return(0);
}

示例 (C++)

#include "HalconCpp.h"
#include <iostream>
using namespace HalconCpp;

int main (int argc, char *argv[])
{
  HWindow        w(10,10,512,512);
  HRegion        reg;
  int            NumOfElements = 3;

  std::cout << "Draw " << NumOfElements << " regions " << std::endl;
  GenEmptyObj(&reg);
  for (int i=0; i < NumOfElements; i++)
  {
    reg = reg.ConcatObj(w.DrawRegion());
  }

  HTuple circ = reg.Circularity ();
  HTuple cont = reg.Contlength ();

  for (int i = 0; i < NumOfElements; i++)
  {
    std::cout << "region " << i+1 << ": \tcircularity = " << circ[i].D() <<
                 "\tcontour length =" << cont[i].D() << std::endl;
  }
  std::cout << "Click into the graphics window to end." << std::endl;
  w.Click ();
  return(0);
}

示例 (C++)

#include "HalconCpp.h"
#include <iostream>
using namespace HalconCpp;

int main (int argc, char *argv[])
{
  HWindow        w(10,10,512,512);
  HRegion        reg;
  int            NumOfElements = 3;

  std::cout << "Draw " << NumOfElements << " regions " << std::endl;
  GenEmptyObj(&reg);
  for (int i=0; i < NumOfElements; i++)
  {
    reg = reg.ConcatObj(w.DrawRegion());
  }

  HTuple circ = reg.Circularity ();
  HTuple cont = reg.Contlength ();

  for (int i = 0; i < NumOfElements; i++)
  {
    std::cout << "region " << i+1 << ": \tcircularity = " << circ[i].D() <<
                 "\tcontour length =" << cont[i].D() << std::endl;
  }
  std::cout << "Click into the graphics window to end." << std::endl;
  w.Click ();
  return(0);
}

示例 (C++)

#include "HalconCpp.h"
#include <iostream>
using namespace HalconCpp;

int main (int argc, char *argv[])
{
  HWindow        w(10,10,512,512);
  HRegion        reg;
  int            NumOfElements = 3;

  std::cout << "Draw " << NumOfElements << " regions " << std::endl;
  GenEmptyObj(&reg);
  for (int i=0; i < NumOfElements; i++)
  {
    reg = reg.ConcatObj(w.DrawRegion());
  }

  HTuple circ = reg.Circularity ();
  HTuple cont = reg.Contlength ();

  for (int i = 0; i < NumOfElements; i++)
  {
    std::cout << "region " << i+1 << ": \tcircularity = " << circ[i].D() <<
                 "\tcontour length =" << cont[i].D() << std::endl;
  }
  std::cout << "Click into the graphics window to end." << std::endl;
  w.Click ();
  return(0);
}

结果

算子 contlengthcontlengthContlengthContlengthContlengthcontlength 在输入不为空时返回值 2 ( H_MSG_TRUE )。当输入为空（无可用输入区域）时，可设置行为通过算子 set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>)。如有必要，则抛出异常。

可能的前趋

thresholdthresholdThresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionConnectionconnection

可能的后继

get_region_contourget_region_contourGetRegionContourGetRegionContourGetRegionContourget_region_contour

替代

compactnesscompactnessCompactnessCompactnessCompactnesscompactness

另见

area_centerarea_centerAreaCenterAreaCenterAreaCenterarea_center, get_region_contourget_region_contourGetRegionContourGetRegionContourGetRegionContourget_region_contour

模块

基础

算子