cxeigen.hpp

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#ifndef __OPENCV_EIGEN_HPP__
#define __OPENCV_EIGEN_HPP__

#ifdef __cplusplus

#include "cxcore.h"
#include <Eigen/Core>

namespace cv
{

template<typename _Tp, int _rows, int _cols, int _options, int _maxRows, int _maxCols>
void eigen2cv( const Eigen::Matrix<_Tp, _rows, _cols, _options, _maxRows, _maxCols>& src,
               Mat& dst, bool _copyData=true )
{
    Mat _src(src.rows(), src.cols(), DataType<_Tp>::type,
          (void*)src.data(), (size_t)(src.stride()*sizeof(_Tp)));
    if( !_copyData )
        dst = _src;
        else
                _src.copyTo(dst);
}
    
template<typename _Tp, int _rows, int _cols, int _options, int _maxRows, int _maxCols>
void cv2eigen( const Mat& src,
               Eigen::Matrix<_Tp, _rows, _cols, _options, _maxRows, _maxCols>& dst )
{
    CV_Assert(src.rows == _rows && src.cols == _cols);
    Mat _dst(_rows, _cols, DataType<_Tp>::type,
             dst.data(), (size_t)(dst.stride()*sizeof(_Tp)));
    src.convertTo(_dst, _dst.type());
    CV_Assert(_dst.data == (uchar*)dst.data());
}

template<typename _Tp>
void cv2eigen( const Mat& src,
               Eigen::Matrix<_Tp, Eigen::Dynamic, Eigen::Dynamic>& dst )
{
    dst.resize(src.rows, src.cols);
    Mat _dst(src.rows, src.cols, DataType<_Tp>::type,
             dst.data(), (size_t)(dst.stride()*sizeof(_Tp)));
    src.convertTo(_dst, _dst.type());
    CV_Assert(_dst.data == (uchar*)dst.data());
}

    
template<typename _Tp>
void cv2eigen( const Mat& src,
               Eigen::Matrix<_Tp, Eigen::Dynamic, 1>& dst )
{
    CV_Assert(src.cols == 1);
    dst.resize(src.rows);
    Mat _dst(src.rows, src.cols, DataType<_Tp>::type,
             dst.data(), (size_t)(dst.stride()*sizeof(_Tp)));
    src.convertTo(_dst, _dst.type());
    CV_Assert(_dst.data == (uchar*)dst.data());
}


template<typename _Tp>
void cv2eigen( const Mat& src,
               Eigen::Matrix<_Tp, 1, Eigen::Dynamic>& dst )
{
    CV_Assert(src.rows == 1);
    dst.resize(src.cols);
    Mat _dst(src.rows, src.cols, DataType<_Tp>::type,
             (void*)dst.data(), (size_t)(dst.stride()*sizeof(_Tp)));
    src.convertTo(_dst, _dst.type());
    CV_Assert(_dst.data == (uchar*)dst.data());
}                     
              
}

#endif

#endif