前言
opencv矩阵结构为：cv::Mat，或者cv::Mat_等，当需要与eigen的矩阵结构相互转换时主要使用函数：cv::eigen2cv和cv::cv2eigen.
code
Eigen::MatrixXd tmp1(values.rows, values.cols); cv::cv2eigen(values, tmp1); Eigen::MatrixXd tmp2(this->weights.rows, this->weights.cols); cv::cv2eigen(this->weights, tmp2); Eigen::MatrixXd tmp = tmp1 * tmp2; cv::Mat out; cv::eigen2cv(tmp, out); out.convertTo(out, CV_32FC1);
include
#include <eigen3/Eigen/Dense>
#include <opencv2/core/eigen.hpp>
参考
1. opencv_Mat_eigen;
完
【opencv基础】opencv中cv::Mat和eigen数据之间的转换
原文：https://www.cnblogs.com/happyamyhope/p/13158582.html