OpenCV CV::Mat and Eigen::Matrix

c++ opencv eigen

Yeraze · Feb 9, 2013 · Viewed 39.3k times · Source

Is there a reversible way to convert an OpenCV cv::Mat object to an Eigen::Matrix?

e.g., Some way of doing:

cv::Mat cvMat;
Eigen::Matrix eigMat;
camera->retrieve(cvMat);

// magic to convert cvMat to eigMat
// work on eigMat
// convert eigMat back to cvMat

imshow("Image", cvMat);

I've tried using cv2eigen and eigen2cv, but the resulting cvMat is completely mangled and I'm not exactly sure why. The dimensions are correct, but the graphics are totally trashed, so possibly a bytes-per-pixel or datasize issue?

Answer

You can also use

void eigen2cv(const Eigen::Matrix<_Tp, _rows, _cols, _options, _maxRows, _maxCols>& src, Mat& dst)

and

void cv2eigen(const Mat& src, Eigen::Matrix<_Tp, _rows, _cols, _options, _maxRows, _maxCols>& dst)

from #include <opencv2/core/eigen.hpp>.

OpenCV CV::Mat and Eigen::Matrix

Answer

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