stereoRectify.cpp

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#include "mexopencv.hpp"
#include "opencv2/calib3d.hpp"
using namespace std;
using namespace cv;

namespace {
MxArray toStruct(const Mat& R1, const Mat& R2, const Mat& P1, const Mat& P2,
    const Mat& Q, const Rect& roi1, const Rect& roi2)
{
    const char* fieldnames[] = {"R1", "R2", "P1", "P2", "Q", "roi1", "roi2"};
    MxArray s = MxArray::Struct(fieldnames, 7);
    s.set("R1",   R1);
    s.set("R2",   R2);
    s.set("P1",   P1);
    s.set("P2",   P2);
    s.set("Q",    Q);
    s.set("roi1", roi1);
    s.set("roi2", roi2);
    return s;
}
}

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    // Check the number of arguments
    nargchk(nrhs>=7 && (nrhs%2)==1 && nlhs<=1);

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

    // Option processing
    int flags = cv::CALIB_ZERO_DISPARITY;
    double alpha = -1;
    Size newImageSize;
    for (int i=7; i<nrhs; i+=2) {
        string key(rhs[i].toString());
        if (key == "ZeroDisparity")
            UPDATE_FLAG(flags, rhs[i+1].toBool(), cv::CALIB_ZERO_DISPARITY);
        else if (key == "Alpha")
            alpha = rhs[i+1].toDouble();
        else if (key == "NewImageSize")
            newImageSize = rhs[i+1].toSize();
        else
            mexErrMsgIdAndTxt("mexopencv:error",
                "Unrecognized option %s", key.c_str());
    }

    // Process
    Mat cameraMatrix1(rhs[0].toMat(CV_64F)),
        distCoeffs1(rhs[1].toMat(CV_64F)),
        cameraMatrix2(rhs[2].toMat(CV_64F)),
        distCoeffs2(rhs[3].toMat(CV_64F)),
        R(rhs[5].toMat(CV_64F)),
        T(rhs[6].toMat(CV_64F)),
        R1, R2, P1, P2, Q;
    Size imageSize(rhs[4].toSize());
    Rect roi1, roi2;
    stereoRectify(cameraMatrix1, distCoeffs1, cameraMatrix2, distCoeffs2,
        imageSize, R, T, R1, R2, P1, P2, Q, flags, alpha, newImageSize,
        &roi1, &roi2);
    plhs[0] = toStruct(R1, R2, P1, P2, Q, roi1, roi2);
}