goodFeaturesToTrack.cpp

Go to the documentation of this file.

#include "mexopencv.hpp"
using namespace std;
using namespace cv;

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    // Check the number of arguments
    nargchk(nrhs>=1 && (nrhs%2)==1 && nlhs<=1);

    // Argument vector
    vector<MxArray> rhs(prhs, prhs+nrhs);

    // Option processing
    int maxCorners = 1000;
    double qualityLevel = 0.01;
    double minDistance = 2.0;
    Mat mask;
    int blockSize = 3;
    bool useHarrisDetector = false;
    double k = 0.04;
    for (int i=1; i<nrhs; i+=2) {
        string key(rhs[i].toString());
        if (key=="MaxCorners")
            maxCorners = rhs[i+1].toInt();
        else if (key=="QualityLevel")
            qualityLevel = rhs[i+1].toDouble();
        else if (key=="MinDistance")
            minDistance = rhs[i+1].toDouble();
        else if (key=="Mask")
            mask = rhs[i+1].toMat(CV_8U);
        else if (key=="BlockSize")
            blockSize = rhs[i+1].toInt();
        else if (key=="UseHarrisDetector")
            useHarrisDetector = rhs[i+1].toBool();
        else if (key=="K")
            k = rhs[i+1].toDouble();
        else
            mexErrMsgIdAndTxt("mexopencv:error","Unrecognized option");
    }

    // Process
    Mat image(rhs[0].toMat(rhs[0].isUint8() ? CV_8U : CV_32F));
    vector<Point2f> corners;
    goodFeaturesToTrack(image, corners, maxCorners, qualityLevel, minDistance,
        mask, blockSize, useHarrisDetector, k);
    plhs[0] = MxArray(corners);
}