面向OpenCV的groupRectangles的Mex

Question

我使用的是matlab中的mexopencv，但是我注意到groupRectangles matlab包装器只支持3个输入参数，而源代码有3个不同的版本。

我不懂C++，但我试图遵循指导方针和编写的代码，但我无法编译它；它给出了一个奇怪的错误。

我们想要得到分组矩形的分数，文档中的groupRectangles变体对我们没有帮助。我们必须使用第三个，将rejectLevels设置为零：vector levels（wins.size()，0)；GroupPrectangles（胜率、级别、得分、groupThreshold、eps)；其中分数是获胜的分数。它们的尺寸一样。

因此，我一直试图以类似于Kyamagu的mexopencv的方式编写包装器，使用-开发一个新的MEX函数-如这里所提到的https://github.com/kyamagu/mexopencv

/**
 * @file groupRectangles.cpp
 * @brief mex interface for groupRectangles //manual 
 * @author Kota Yamaguchi
 * @date 2011
 */
#include "mexopencv.hpp"
using namespace std;
using namespace cv;

template <>
vector<Rect> MxArray::toVector<Rect>() const
{
    vector<Rect> vr;
    if (isNumeric())
        vr.push_back(toRect());
    else if (isCell()) {
        int n = numel();
        vector<MxArray> vm(toVector<MxArray>());
        vr.reserve(n);
        for (int i=0; i<n; ++i)
            vr.push_back(vm[i].toRect());
    }
    else
        mexErrMsgIdAndTxt("mexopencv:error","Invalid input");
    return vr;
}

/*
* edit start
*/

template <>
vector<Scalar> MxArray::toVector<Scalar>() const
{
    vector<Scalar> levels;
    if (isNumeric())
        levels.push_back(toScalar());
    else if (isCell()) {
        int n = numel();
        vector<MxArray> vm(toVector<MxArray>());
        levels.reserve(n);
        for (int i=0; i<n; ++i)
            levels.push_back(vm[i].toScalar());
    }
    else
        mexErrMsgIdAndTxt("mexopencv:error","Invalid input");
    return levels;
}

template <>
vector<Scalar> MxArray::toVector<Scalar>() const
{
    vector<Scalar> scores;
    if (isNumeric())
        scores.push_back(toScalar());
    else if (isCell()) {
        int n = numel();
        vector<MxArray> vm(toVector<MxArray>());
        scores.reserve(n);
        for (int i=0; i<n; ++i)
            scores.push_back(vm[i].toScalar());
    }
    else
        mexErrMsgIdAndTxt("mexopencv:error","Invalid input");
    return scores;
}





/*
* edit end
*/



/**
 * Main entry called from Matlab
 * @param nlhs number of left-hand-side arguments
 * @param plhs pointers to mxArrays in the left-hand-side
 * @param nrhs number of right-hand-side arguments
 * @param prhs pointers to mxArrays in the right-hand-side
 */
void mexFunction( int nlhs, mxArray *plhs[],
                  int nrhs, const mxArray *prhs[] )
{
    // Check the number of arguments
    if (nrhs<2 || (nrhs%2)!=0 || nlhs>1)
        mexErrMsgIdAndTxt("mexopencv:error","Wrong number of arguments");

    // Argument vector
    vector<MxArray> rhs(prhs,prhs+nrhs);
    vector<Rect> rectList(rhs[0].toVector<Rect>());



/*
* edit start
*/

  vector<Scalar> levels(rhs[1].toVector<Scalar>());
  vector<Scalar> scores(rhs[2].toVector<Scalar>());

/*
* edit end
*/

/*
* edited
*/


    int groupThreshold = rhs[3].toInt();
    double eps=0.2;

    for (int i=4; i<nrhs; i+=2) {
        string key(rhs[i].toString());
        if (key=="EPS")
            eps = rhs[i+1].toDouble();
        else
            mexErrMsgIdAndTxt("mexopencv:error","Unrecognized option %s", key.c_str());
    }

    groupRectangles(rectList,levels,scores,groupThreshold,eps);
    plhs[0] = MxArray(rectList);
}

我得到的错误是：

&，int&,double&)'src/+cv/fullgroupprectangles.cpp:123:62:注意：候选者为：在文件中包括/usr/local/include/opencv2/opencv.hpp:54:0，从include/mxarray.hpp:14，从include/mexopencv.hpp:14，从src/+cv/fullgroupprectangles.cpp:7:/usr/local/include/opencv2/objdetect/objdetect.hpp:330:17:注意：void.hpp:330:17:注意:
候选人需要3个参数，提供了5个/usr/local/include/opencv2/objdetect/objdetect.hpp:331:19:注意：void cv：：groupprectangles（std：：vector>&,std：：vector&,int,double）/usr/local/include/opencv2/objdetect/objdetect.hpp:331:19:注意:
候选人需要4个参数，在文件中提供了5个参数，文件中包括/+cv/fullgrouprectangles.cpp:7:/usr/local/include/opencv2/objdetect/objdetect.hpp:332:17:注意：void cv::grouprectangles(std::vector>&,int,double,std：：vector,std：：vector）/usr/local/include/opencv2/objdetect/objdetect.hpp:332:17：注意：没有已知的参数2从“std：：vector”到“int”/usr/local/include/opencv2/objdetect/objdetect.hpp:333:17：注意：void cv：：groupprectangles（std：：vector>&,std：：vector&,std：：vector&,int,double）：矢量&'

mex: compile of ' "src/+cv/fullgroupRectangles.cpp"' failed.

make:***[+CV/FullGroupRectangles.mexa64]错误255

我真的很感激，谢谢！

Answer 1

带有5个参数的groupRectangles（）获取向量级别和向量得分。只是需要修理。

  /**
   * @file groupRectangles.cpp
   * @brief mex interface for groupRectangles //manual 
   * @author Kota Yamaguchi
   * @date 2011
   */
  #include "mexopencv.hpp"
  using namespace std;
  using namespace cv;


  /*
  * edit end
  */



  /**
   * Main entry called from Matlab
   * @param nlhs number of left-hand-side arguments
   * @param plhs pointers to mxArrays in the left-hand-side
   * @param nrhs number of right-hand-side arguments
   * @param prhs pointers to mxArrays in the right-hand-side
   */
  void mexFunction( int nlhs, mxArray *plhs[],
                    int nrhs, const mxArray *prhs[] )
  {
      // Check the number of arguments
      if (nrhs<2 || (nrhs%2)!=0 || nlhs>1)
          mexErrMsgIdAndTxt("mexopencv:error","Wrong number of arguments");

      // Argument vector
      vector<MxArray> rhs(prhs,prhs+nrhs);
      vector<Rect> rectList(rhs[0].toVector<Rect>());



  /*
  * edit start
  */

    vector<int> levels(rhs[1].toVector<int>());
    vector<double> scores(rhs[2].toVector<double>());

  /*
  * edit end
  */

  /*
  * edited
  */


      int groupThreshold = rhs[3].toInt();
      double eps=0.2;

      for (int i=4; i<nrhs; i+=2) {
          string key(rhs[i].toString());
          if (key=="EPS")
              eps = rhs[i+1].toDouble();
          else
              mexErrMsgIdAndTxt("mexopencv:error","Unrecognized option %s", key.c_str());
      }

      groupRectangles(rectList,levels, scores,groupThreshold,eps);
      plhs[0] = MxArray(rectList);

  }